Lewis and Clark County, MT
An ordinary day in Lewis and Clark County, MT: was cooler than 40 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.
- Tuesday 29 September 2026: a high of 63.1°F averaged over Lewis and Clark County, MT, the coldest 29 September day in the county average since 2023, 36th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 37.9°F averaged over Lewis and Clark County, MT, the warmest 29 September night in the county average since 2025, tied 31st warmest of 76 (with 2000 and 1975) (county average from NOAA gridded data, 1951 to 2026).
- No measurable precipitation in the county average of Lewis and Clark County, MT for 9 days to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).
The month
- September 2026 so far averaged 53.9°F in Lewis and Clark County, MT, the warmest 1 to 29 September in the county average since 2025, 24th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- August 2026 averaged 63°F in Lewis and Clark County, MT, the warmest August in the county average since 2025, tied 25th warmest of 132 (with 2023, 2012, 1999 and 1 other year) (county average from NOAA's monthly county data, 1895 to 2026).
- Days of the month without a value
- 0
Every year on this date
- Above the normal range
- In it
- Below it
- Normal range
- This year and the extreme
Every year as a table
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 63.1 | 37.9 |
| 2025 | 74.3 | 40.2 |
| 2024 | 77.5 | 41.1 |
| 2023 | 55.7 | 34.5 |
| 2022 | 79.7 | 44.1 |
| 2021 | 56.9 | 36.5 |
| 2020 | 66.9 | 35.3 |
| 2019 | 32.3 | 22.1 |
| 2018 | 42.3 | 32.9 |
| 2017 | 69 | 35.9 |
| 2016 | 70.1 | 40.2 |
| 2015 | 66.9 | 32.1 |
| 2014 | 50.8 | 41.7 |
| 2013 | 51.1 | 39.2 |
| 2012 | 75.2 | 39.5 |
| 2011 | 62.9 | 34.4 |
| 2010 | 76.3 | 45.8 |
| 2009 | 70.1 | 31.8 |
| 2008 | 67.4 | 35.9 |
| 2007 | 63.3 | 35.3 |
| 2006 | 70.2 | 44.6 |
| 2005 | 63.9 | 33.3 |
| 2004 | 67.5 | 36.6 |
| 2003 | 62.7 | 32.3 |
| 2002 | 59.1 | 33.4 |
| 2001 | 68.3 | 44.2 |
| 2000 | 70.9 | 37.9 |
| 1999 | 50.7 | 23.3 |
| 1998 | 66.5 | 38.3 |
| 1997 | 59.8 | 40 |
| 1996 | 71.9 | 40.6 |
| 1995 | 59.8 | 37.2 |
| 1994 | 75.6 | 41.8 |
| 1993 | 67.5 | 38.2 |
| 1992 | 71.1 | 36.2 |
| 1991 | 69.5 | 39.8 |
| 1990 | 64.8 | 33 |
| 1989 | 74.3 | 42.1 |
| 1988 | 56.3 | 36.3 |
| 1987 | 63.4 | 34.2 |
| 1986 | 46.6 | 35.1 |
| 1985 | 31.7 | 16.4 |
| 1984 | 48.3 | 18.7 |
| 1983 | 46.2 | 31 |
| 1982 | 39.5 | 33.3 |
| 1981 | 55.1 | 39.2 |
| 1980 | 67.6 | 40 |
| 1979 | 68.1 | 36.8 |
| 1978 | 52.4 | 38.2 |
| 1977 | 50 | 40.5 |
| 1976 | 70.8 | 41.5 |
| 1975 | 66.4 | 37.9 |
| 1974 | 60.1 | 29 |
| 1973 | 72.8 | 36.9 |
| 1972 | 44 | 25.3 |
| 1971 | 47.8 | 29.5 |
| 1970 | 74 | 39.7 |
| 1969 | 64.1 | 39.1 |
| 1968 | 64.8 | 38.8 |
| 1967 | 81.1 | 48.8 |
| 1966 | 65.4 | 46.4 |
| 1965 | 42.8 | 29 |
| 1964 | 57.8 | 35.9 |
| 1963 | 75.8 | 37.4 |
| 1962 | 60.5 | 40.1 |
| 1961 | 50.8 | 28.9 |
| 1960 | 63.2 | 28.3 |
| 1959 | 39.9 | 27.5 |
| 1958 | 60 | 35.9 |
| 1957 | 71.5 | 41.8 |
| 1956 | 50.5 | 35 |
| 1955 | 48.5 | 32.3 |
| 1954 | 35.5 | 30.5 |
| 1953 | 60.5 | 34 |
| 1952 | 68.3 | 40.3 |
| 1951 | 62.3 | 31.6 |
Nearby
Helena, MT 40.3 mi, the nearest city with its own station