Jefferson County, ID
An ordinary day in Jefferson County, ID: was cooler than 47 of 75 earlier years in the county average (county average from NOAA gridded data, 1951 to 2026).
Last updated . This page normally updates every day; the latest update is late.
- High
- 68.2°F
- Coldest since 2023
- 29th coldest of 76
- Low
- 42.1°F
- Warmest since 2025
- 12th warmest of 76
- Precipitation
- 0.01 in
- Wettest since 2019
- 13th wettest of 76
- Normal range, 61.5 to 79.5°F
Every year as a table
Every 29 September low of the county average in Jefferson County, ID since 1951: 42.1°F in 2026; the lowest is 16.9°F, in 1985.
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 68.2 | 42.1 |
| 2025 | 76.2 | 45.9 |
| 2024 | 86 | 43.3 |
| 2023 | 64.8 | 35.4 |
| 2022 | 79.6 | 43 |
| 2021 | 60.1 | 30.4 |
| 2020 | 69.2 | 30.6 |
| 2019 | 50.7 | 34.3 |
| 2018 | 76.3 | 35 |
| 2017 | 69.6 | 36.2 |
| 2016 | 79.5 | 41.8 |
| 2015 | 78.7 | 37.7 |
| 2014 | 59 | 42 |
| 2013 | 61.8 | 41.8 |
| 2012 | 76.2 | 41 |
| 2011 | 77.7 | 40.4 |
| 2010 | 83.8 | 38.6 |
| 2009 | 79.8 | 42.1 |
| 2008 | 79.4 | 35.6 |
| 2007 | 65.6 | 34.5 |
| 2006 | 75.2 | 35.8 |
| 2005 | 69.8 | 30.1 |
| 2004 | 74.1 | 41.1 |
| 2003 | 80.3 | 42.4 |
| 2002 | 67 | 36.1 |
| 2001 | 76 | 46 |
| 2000 | 78.7 | 38 |
| 1999 | 57.8 | 20 |
| 1998 | 76 | 38.4 |
| 1997 | 68.1 | 31.3 |
| 1996 | 74.1 | 32.6 |
| 1995 | 63.6 | 36.4 |
| 1994 | 78.8 | 41.6 |
| 1993 | 76.9 | 35.4 |
| 1992 | 78.3 | 32.3 |
| 1991 | 67.8 | 45.3 |
| 1990 | 76.6 | 41 |
| 1989 | 79.9 | 42.8 |
| 1988 | 63.4 | 30.3 |
| 1987 | 70.6 | 28 |
| 1986 | 49.9 | 28.9 |
| 1985 | 48.7 | 16.9 |
| 1984 | 60.7 | 25.2 |
| 1983 | 59.3 | 43.3 |
| 1982 | 48.1 | 35.3 |
| 1981 | 59.9 | 42.9 |
| 1980 | 74.5 | 34.8 |
| 1979 | 76.1 | 36.6 |
| 1978 | 74.5 | 38.4 |
| 1977 | 68.4 | 46 |
| 1976 | 73.7 | 35.3 |
| 1975 | 71.3 | 32.1 |
| 1974 | 68.7 | 31.8 |
| 1973 | 73.7 | 34.1 |
| 1972 | 54.1 | 24.6 |
| 1971 | 50 | 32.6 |
| 1970 | 76.9 | 31.3 |
| 1969 | 74.9 | 39.9 |
| 1968 | 71.1 | 36.5 |
| 1967 | 80.9 | 40.3 |
| 1966 | 71.3 | 40 |
| 1965 | 54.4 | 33 |
| 1964 | 72 | 34.1 |
| 1963 | 81.4 | 40.8 |
| 1962 | 64.1 | 39.4 |
| 1961 | 53.8 | 33.2 |
| 1960 | 76.2 | 38.3 |
| 1959 | 50.1 | 22.4 |
| 1958 | 67.9 | 36.4 |
| 1957 | 82 | 42.2 |
| 1956 | 64.8 | 30.1 |
| 1955 | 59.3 | 27.3 |
| 1954 | 52.1 | 29.4 |
| 1953 | 70.1 | 36.7 |
| 1952 | 75.2 | 36.7 |
| 1951 | 72.4 | 40.6 |
The month
September 2026 so far averaged 59°F in Jefferson County, ID, the warmest 1 to 29 September in the county average since 2025, 17th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
The month in words
- August 2026 averaged 70.1°F in Jefferson County, ID, the warmest August in the county average since 2022, 4th warmest of 132 (county average from NOAA's monthly county data, 1895 to 2026).
- Tuesday 29 September 2026: a high of 68.2°F averaged over Jefferson County, ID, the coldest 29 September day in the county average since 2023, 29th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 42.1°F averaged over Jefferson County, ID, the warmest 29 September night in the county average since 2025, tied 12th warmest of 76 (with 2009) (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: 0.01 in of precipitation averaged over Jefferson County, ID, the wettest 29 September in the county average since 2019, tied 13th wettest of 76 (with 2004) (county average from NOAA gridded data, 1951 to 2026).
- Days of the month without a value
- 0
Nearby
Pocatello, ID 61.9 mi, the nearest city with its own station