Idaho
On Saturday , 5 of 9 Idaho cities had a day more extreme than any in 10 years or more. In the county averages of Tuesday 29 September 2026, 1 of 44 Idaho counties did.
Cities
| City | Day | High | Low | Precipitation | The day | Month so far, rank | Years compared |
|---|---|---|---|---|---|---|---|
| Boise, ID Notable | 85°F | 52°F | 0.00 in | the warmest 3 October since 2010 | 14 | 150 | |
| Burley, ID Notable | 80°F | 42°F | 0.00 in | the warmest 3 October since 2011 | 11 | 105 | |
| Dworshak, ID Notable | 83°F | 51°F | the warmest 3 October since 2010 | 17 | 113 | ||
| Jerome, ID Notable | 80°F | 46°F | 0.00 in | the warmest 3 October since 2011 | 12 | 102 | |
| Pocatello, ID Notable | 81°F | 37°F | 0.00 in | the warmest 3 October since 2011 | 15 | 88 | |
| Challis, ID | 78°F | 40°F | 0.00 in | the warmest 3 October since 2021 | 5 | 100 | |
| Lewiston, ID | 80°F | 48°F | 0.00 in | the warmest 3 October since 2022 | 23 | 133 | |
| McCall, ID | 76°F | 37°F | 0.00 in | the warmest 3 October since 2020 | 7 | 99 | |
| Salmon, ID | 75°F | 35°F | 0.00 in | the warmest 30 September since 2025 | 32 | 106 | |
| Stanley, ID | 75°F | 25°F | 0.00 in | the warmest 3 October since 2020 | 6 | 56 |
- 2026 so far averaged 59.7°F in Boise, ID, tying the record for the warmest 1 January to 3 October, set in 1934, in 149 years since 1878; provisional.
- 2026 so far averaged 55.5°F in Burley, ID, the warmest 1 January to 3 October since 1994 (2000 excluded: 29 of 277 days missing), 3rd warmest of 103.
- 2026 so far averaged 58.9°F in Dworshak, ID (25 days missing), the warmest 1 January to 3 October since 1934 (1941 excluded: 38 of 276 days missing; 1967 excluded: 35 of 276 days missing; 1982 excluded: 43 of 276 days missing; 3 more years excluded for missing days), 2nd warmest of 112.
- 2026 so far averaged 56.6°F in Jerome, ID, the warmest 1 January to 3 October since 1934 (1950 excluded: 38 of 276 days missing; 1987 excluded: 32 of 276 days missing; 2001 excluded: 52 of 276 days missing), 2nd warmest of 104.
- 2026 so far averaged 54.3°F in Pocatello, ID, the warmest 1 January to 3 October on record, in 88 years since 1939; provisional.
- 2026 so far averaged 51.9°F in Challis, ID, the warmest 1 January to 3 October since 1992 (1993 excluded: 44 of 276 days missing; 1994 excluded: 44 of 276 days missing; 1995 excluded: 60 of 276 days missing; 4 more years excluded for missing days), 3rd warmest of 100.
- Fall 2026 so far brought 1.63 in of precipitation in Lewiston, ID, the wettest 1 September to 3 October since 2000, 18th wettest of 134.
- 2026 so far averaged 47.2°F in McCall, ID, the warmest 1 January to 3 October since 2015, 3rd warmest of 86.
- September 2026 brought 2.02 in of precipitation in Salmon, ID, the wettest September since 1986 (2000 excluded: 8 of 30 days missing; 2017 excluded: 4 of 30 days missing; 2019 excluded: 4 of 30 days missing), 6th wettest of 114.
- The first freeze of fall 2026 in Stanley, ID came on Monday 3 August 2026, the earliest since 2016, tied 24th earliest of 59 (with 2012, 2008, 2005 and 4 other years).
Counties
| County | Day | The day in the county average |
|---|---|---|
| Boundary County, ID Notable | the coldest 29 September night in the county average since 1999 | |
| Ada County, ID | the warmest 29 September in the county average since 2025 | |
| Adams County, ID | the warmest 29 September in the county average since 2025 | |
| Bannock County, ID | the warmest 29 September in the county average since 2025 | |
| Bear Lake County, ID | the warmest 29 September in the county average since 2025 | |
| Benewah County, ID | the warmest 29 September in the county average since 2025 | |
| Bingham County, ID | the warmest 29 September in the county average since 2025 | |
| Blaine County, ID | the warmest 29 September in the county average since 2025 | |
| Boise County, ID | the warmest 29 September in the county average since 2025 | |
| Bonner County, ID | the warmest 29 September in the county average since 2025 | |
| Bonneville County, ID | the warmest 29 September in the county average since 2025 | |
| Butte County, ID | the warmest 29 September in the county average since 2025 | |
| Camas County, ID | the warmest 29 September in the county average since 2025 | |
| Canyon County, ID | the warmest 29 September in the county average since 2025 | |
| Caribou County, ID | the warmest 29 September in the county average since 2025 | |
| Cassia County, ID | the warmest 29 September in the county average since 2025 | |
| Clark County, ID | the warmest 29 September in the county average since 2025 | |
| Clearwater County, ID | the warmest 29 September in the county average since 2025 | |
| Custer County, ID | the warmest 29 September in the county average since 2025 | |
| Elmore County, ID | the warmest 29 September in the county average since 2025 | |
| Franklin County, ID | the warmest 29 September in the county average since 2025 | |
| Fremont County, ID | the warmest 29 September in the county average since 2025 | |
| Gem County, ID | the warmest 29 September in the county average since 2025 | |
| Gooding County, ID | the warmest 29 September in the county average since 2025 | |
| Idaho County, ID | the warmest 29 September in the county average since 2025 | |
| Jefferson County, ID | the warmest 29 September in the county average since 2025 | |
| Jerome County, ID | the warmest 29 September in the county average since 2025 | |
| Kootenai County, ID | the warmest 29 September in the county average since 2025 | |
| Latah County, ID | the warmest 29 September in the county average since 2025 | |
| Lemhi County, ID | the warmest 29 September in the county average since 2025 | |
| Lewis County, ID | the warmest 29 September in the county average since 2025 | |
| Lincoln County, ID | the warmest 29 September in the county average since 2025 | |
| Madison County, ID | the warmest 29 September in the county average since 2025 | |
| Minidoka County, ID | the warmest 29 September in the county average since 2025 | |
| Nez Perce County, ID | the warmest 29 September in the county average since 2025 | |
| Oneida County, ID | the warmest 29 September in the county average since 2025 | |
| Owyhee County, ID | the warmest 29 September in the county average since 2025 | |
| Payette County, ID | the warmest 29 September in the county average since 2025 | |
| Power County, ID | the warmest 29 September in the county average since 2025 | |
| Shoshone County, ID | the warmest 29 September in the county average since 2025 | |
| Teton County, ID | the warmest 29 September in the county average since 2025 | |
| Twin Falls County, ID | the warmest 29 September in the county average since 2025 | |
| Valley County, ID | the warmest 29 September in the county average since 2025 | |
| Washington County, ID | the warmest 29 September in the county average since 2025 |
Records set this year
- RecordFriday 21 August 2026: a high of 91°F in Stanley, ID, the warmest 21 August on record, in 67 years since 1916 (no value for 1920, 1927, 1929 and 41 other years); provisional, awaiting the National Weather Service report.
- RecordFriday 21 August 2026: a high of 101°F in Pocatello, ID, the warmest 21 August on record, in 88 years since 1939; provisional, awaiting the National Weather Service report.
- RecordFriday 21 August 2026: a high of 95°F in McCall, ID, the warmest 21 August on record, in 110 years since 1906 (no value for 1911, 1912, 1913 and 8 other years); provisional, awaiting the National Weather Service report.
- RecordFriday 21 August 2026: a high of 99°F in Burley, ID, the warmest 21 August on record, in 108 years since 1917 (no value for 1940 and 1941); provisional, awaiting the National Weather Service report.
- RecordThursday 20 August 2026: a high of 89°F in Stanley, ID, the warmest 20 August on record, in 69 years since 1916 (no value for 1927, 1929, 1930 and 39 other years); provisional, awaiting the National Weather Service report.
- RecordThursday 20 August 2026: a high of 100°F in Pocatello, ID, the warmest 20 August on record, in 88 years since 1939; provisional, awaiting the National Weather Service report.
- RecordSunday 2 August 2026: a high of 103°F in Salmon, ID, the warmest 2 August on record, in 117 years since 1906 (no value for 1920, 1924, 1927 and 1 other year); provisional, awaiting the National Weather Service report.
- RecordSaturday 1 August 2026: a high of 103°F in Pocatello, ID, the warmest 1 August on record, in 88 years since 1939; provisional, awaiting the National Weather Service report.
- RecordSaturday 1 August 2026: a high of 100°F in Challis, ID, the warmest 1 August on record, in 108 years since 1897 (no value for 1898, 1901, 1902 and 19 other years); provisional, awaiting the National Weather Service report.
- RecordSaturday 1 August 2026: a high of 100°F in Burley, ID, the warmest 1 August on record, in 107 years since 1917 (no value for 1940, 1941 and 1948); provisional, awaiting the National Weather Service report.
- RecordSunday 26 July 2026: a high of 103°F in Salmon, ID, the warmest 26 July on record, in 117 years since 1906 (no value for 1920, 1929, 1932 and 1 other year); provisional, awaiting the National Weather Service report.
- RecordSaturday 25 July 2026: a high of 103°F in Salmon, ID, the warmest 25 July on record, in 116 years since 1906 (no value for 1920, 1925, 1926 and 2 other years); provisional, awaiting the National Weather Service report.
- RecordSaturday 25 July 2026: a high of 101°F in Pocatello, ID, the warmest 25 July on record, in 88 years since 1939; provisional, awaiting the National Weather Service report.
- RecordThursday 11 June 2026: a low of 32°F in Pocatello, ID, the coldest 11 June night on record, in 88 years since 1939; provisional, awaiting the National Weather Service report.
- RecordSunday 17 May 2026: a low of 14°F in Stanley, ID, the coldest 17 May night on record, in 66 years since 1917 (no value for 1922, 1929, 1930 and 41 other years); provisional, awaiting the National Weather Service report.
- RecordTuesday 12 May 2026: a high of 79°F in Stanley, ID, the warmest 12 May on record, in 68 years since 1917 (no value for 1929, 1930, 1931 and 39 other years); provisional, awaiting the National Weather Service report.
- RecordTuesday 12 May 2026: a high of 92°F in Burley, ID, the warmest 12 May on record, in 106 years since 1918 (no value for 1940, 1941 and 1942); provisional, awaiting the National Weather Service report.
- RecordTuesday 12 May 2026: a high of 96°F in Boise, ID, the warmest 12 May on record, in 152 years since 1875; provisional, awaiting the National Weather Service report.
- RecordSaturday 25 April 2026: a low of 15°F in Pocatello, ID, the coldest 25 April night on record, in 88 years since 1939; provisional, awaiting the National Weather Service report.
- RecordWednesday 25 March 2026: a high of 75°F in Pocatello, ID, the warmest 25 March on record, in 88 years since 1939; provisional, awaiting the National Weather Service report.
- RecordWednesday 25 March 2026: a high of 75°F in Jerome, ID, the warmest 25 March on record, in 109 years since 1916 (no value for 1921 and 1934); provisional, awaiting the National Weather Service report.
- RecordWednesday 25 March 2026: a high of 77°F in Burley, ID, the warmest 25 March on record, in 107 years since 1918 (no value for 1940 and 1942); provisional, awaiting the National Weather Service report.
- RecordTuesday 24 March 2026: a high of 71°F in Pocatello, ID, the warmest 24 March on record, in 88 years since 1939; provisional, awaiting the National Weather Service report.
- RecordSaturday 21 March 2026: a high of 80°F in Salmon, ID, the warmest 21 March on record, in 114 years since 1906 (no value for 1919, 1920, 1924 and 4 other years); provisional, awaiting the National Weather Service report.
- RecordFriday 20 March 2026: a high of 64°F in Stanley, ID, the warmest 20 March on record, in 67 years since 1917 (no value for 1918, 1923, 1925 and 40 other years); provisional, awaiting the National Weather Service report.
- RecordFriday 20 March 2026: a high of 78°F in Salmon, ID, the warmest 20 March on record, in 114 years since 1906 (no value for 1919, 1921, 1925 and 4 other years); provisional, awaiting the National Weather Service report.
- RecordFriday 20 March 2026: a high of 77°F in Pocatello, ID, the warmest 20 March on record, in 88 years since 1939; provisional, awaiting the National Weather Service report.
- RecordFriday 20 March 2026: a high of 69°F in McCall, ID, the warmest 20 March on record, in 110 years since 1906 (no value for 1911, 1912, 1913 and 8 other years); provisional, awaiting the National Weather Service report.
- RecordFriday 20 March 2026: a high of 79°F in Jerome, ID, the warmest 20 March on record, in 109 years since 1916 (no value for 1921 and 1934); provisional, awaiting the National Weather Service report.
- RecordFriday 20 March 2026: a high of 75°F in Challis, ID, the warmest 20 March on record, in 115 years since 1895 (no value for 1897, 1901, 1902 and 14 other years); provisional, awaiting the National Weather Service report.
- RecordFriday 20 March 2026: a high of 80°F in Burley, ID, the warmest 20 March on record, in 107 years since 1918 (no value for 1940 and 1942); provisional, awaiting the National Weather Service report.
- RecordFriday 20 March 2026: a high of 83°F in Boise, ID, the warmest 20 March on record, in 152 years since 1875; provisional, awaiting the National Weather Service report.
- RecordThursday 19 March 2026: a high of 63°F in Stanley, ID, the warmest 19 March on record, in 67 years since 1917 (no value for 1918, 1923, 1925 and 40 other years); provisional, awaiting the National Weather Service report.
- RecordThursday 19 March 2026: a high of 78°F in Salmon, ID, the warmest 19 March on record, in 115 years since 1906 (no value for 1919, 1922, 1927 and 3 other years); provisional, awaiting the National Weather Service report.
- RecordThursday 19 March 2026: a high of 77°F in Pocatello, ID, the warmest 19 March on record, in 88 years since 1939; provisional, awaiting the National Weather Service report.
- RecordThursday 19 March 2026: a high of 66°F in McCall, ID, the warmest 19 March on record, in 110 years since 1906 (no value for 1911, 1912, 1913 and 8 other years); provisional, awaiting the National Weather Service report.
- RecordThursday 19 March 2026: a high of 76°F in Jerome, ID, the warmest 19 March on record, in 108 years since 1916 (no value for 1921, 1934 and 1955); provisional, awaiting the National Weather Service report.
- RecordThursday 19 March 2026: a high of 75°F in Challis, ID, the warmest 19 March on record, in 112 years since 1895 (no value for 1897, 1901, 1902 and 17 other years); provisional, awaiting the National Weather Service report.
- RecordWednesday 18 March 2026: a high of 62°F in Stanley, ID, the warmest 18 March on record, in 67 years since 1917 (no value for 1918, 1923, 1925 and 40 other years); provisional, awaiting the National Weather Service report.
- RecordWednesday 18 March 2026: a high of 77°F in Pocatello, ID, the warmest 18 March on record, in 88 years since 1939; provisional, awaiting the National Weather Service report.
- RecordWednesday 18 March 2026: a high of 65°F in McCall, ID, the warmest 18 March on record, in 111 years since 1906 (no value for 1908, 1911, 1912 and 7 other years); provisional, awaiting the National Weather Service report.
- RecordWednesday 18 March 2026: a high of 77°F in Jerome, ID, the warmest 18 March on record, in 109 years since 1916 (no value for 1921 and 1934); provisional, awaiting the National Weather Service report.
- RecordWednesday 18 March 2026: a high of 74°F in Challis, ID, the warmest 18 March on record, in 114 years since 1895 (no value for 1897, 1901, 1902 and 15 other years); provisional, awaiting the National Weather Service report.
- RecordWednesday 18 March 2026: a high of 78°F in Burley, ID, the warmest 18 March on record, in 107 years since 1918 (no value for 1940 and 1942); provisional, awaiting the National Weather Service report.
- RecordWednesday 18 March 2026: a high of 80°F in Boise, ID, the warmest 18 March on record, in 152 years since 1875; provisional, awaiting the National Weather Service report.
- RecordTuesday 17 March 2026: a high of 59°F in Stanley, ID, the warmest 17 March on record, in 65 years since 1917 (no value for 1918, 1919, 1923 and 42 other years); provisional, awaiting the National Weather Service report.
- RecordSunday 8 March 2026: a high of 60°F in Pocatello, ID, the warmest 8 March on record, in 88 years since 1939; provisional, awaiting the National Weather Service report.
- RecordSaturday 28 February 2026: a high of 59°F in Salmon, ID, the warmest 28 February on record, in 115 years since 1906 (no value for 1919, 1925, 1932 and 3 other years); provisional, awaiting the National Weather Service report.
- RecordWednesday 18 February 2026: a high of 58°F in Salmon, ID, the warmest 18 February on record, in 115 years since 1906 (no value for 1919, 1923, 1928 and 3 other years); provisional, awaiting the National Weather Service report.
- RecordSaturday 7 February 2026: a high of 46°F in Stanley, ID, the warmest 7 February on record, in 64 years since 1917 (no value for 1918, 1923, 1924 and 43 other years); provisional, awaiting the National Weather Service report.
- RecordSaturday 3 January 2026: a high of 59°F in Boise, ID, the warmest 3 January on record, in 152 years since 1875; provisional, awaiting the National Weather Service report.
- Records set this year not listed
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