Custer County, MT
: September 2026 so far averaged 64.2°F in Custer County, MT, the warmest 1 to 29 September in the county average since 2024, tied 9th warmest of 76 (with 2015) (county average from NOAA gridded data, 1951 to 2026).
Last updated . This page normally updates every day; the latest update is late.
- High
- 71.2°F
- Warmest since 2025
- 37th warmest of 76
- Low
- 45.6°F
- Warmest since 2025
- 14th warmest of 76
No measurable precipitation in the county average of Custer County, MT for 5 days to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).
- Normal range, 32.8 to 46.1°F
Every year as a table
Every 29 September high of the county average in Custer County, MT since 1951: 71.2°F in 2026; the highest is 91.6°F, in 2024.
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 71.2 | 45.6 |
| 2025 | 88.2 | 48.7 |
| 2024 | 91.6 | 49.8 |
| 2023 | 68.4 | 45.8 |
| 2022 | 85.9 | 47.4 |
| 2021 | 88 | 49.7 |
| 2020 | 68.2 | 35.7 |
| 2019 | 48.7 | 38.4 |
| 2018 | 50.1 | 32.3 |
| 2017 | 75.3 | 44.5 |
| 2016 | 77.8 | 47.7 |
| 2015 | 67.4 | 40.3 |
| 2014 | 57 | 43.8 |
| 2013 | 66.4 | 37.7 |
| 2012 | 81.5 | 44.9 |
| 2011 | 74.7 | 42.2 |
| 2010 | 88.2 | 47.7 |
| 2009 | 66.4 | 33 |
| 2008 | 68 | 37.3 |
| 2007 | 84 | 42.5 |
| 2006 | 73.9 | 32.8 |
| 2005 | 62 | 34.2 |
| 2004 | 74.2 | 41.3 |
| 2003 | 62.9 | 33.1 |
| 2002 | 64.7 | 36.5 |
| 2001 | 91.2 | 54.2 |
| 2000 | 82.6 | 41.2 |
| 1999 | 54.1 | 27.7 |
| 1998 | 77.2 | 43.4 |
| 1997 | 72.7 | 45.9 |
| 1996 | 73 | 39.4 |
| 1995 | 77.8 | 42.8 |
| 1994 | 82.7 | 42.9 |
| 1993 | 69.5 | 37 |
| 1992 | 77.6 | 31 |
| 1991 | 76.7 | 43.1 |
| 1990 | 63.3 | 31.3 |
| 1989 | 86.1 | 48.7 |
| 1988 | 57.7 | 36.2 |
| 1987 | 64.8 | 36.6 |
| 1986 | 56.6 | 38.3 |
| 1985 | 34.7 | 23.4 |
| 1984 | 47.2 | 25.9 |
| 1983 | 47.8 | 35.4 |
| 1982 | 43 | 33.6 |
| 1981 | 74.1 | 40.7 |
| 1980 | 89.4 | 46 |
| 1979 | 83.2 | 42.1 |
| 1978 | 68.5 | 49.9 |
| 1977 | 65 | 42.9 |
| 1976 | 74.5 | 32.6 |
| 1975 | 70.8 | 37.3 |
| 1974 | 64.1 | 33.8 |
| 1973 | 76.9 | 39.1 |
| 1972 | 53.9 | 23.8 |
| 1971 | 63.6 | 36.9 |
| 1970 | 78.7 | 36.9 |
| 1969 | 81.1 | 39.6 |
| 1968 | 70.1 | 38.3 |
| 1967 | 86.4 | 43.2 |
| 1966 | 70 | 44 |
| 1965 | 42.2 | 33.3 |
| 1964 | 66 | 34.7 |
| 1963 | 75.2 | 38.1 |
| 1962 | 73.9 | 50.9 |
| 1961 | 65.6 | 34.6 |
| 1960 | 63.5 | 36.9 |
| 1959 | 44.7 | 28.6 |
| 1958 | 69.7 | 37.3 |
| 1957 | 84.3 | 44 |
| 1956 | 60.6 | 37.3 |
| 1955 | 72.5 | 38 |
| 1954 | 48.7 | 35 |
| 1953 | 80.1 | 41.1 |
| 1952 | 80.4 | 41.3 |
| 1951 | 70.3 | 34.7 |
The month
August 2026 averaged 71.8°F in Custer County, MT, the warmest August in the county average since 2023, tied 31st warmest of 132 (with 2023 and 2007) (county average from NOAA's monthly county data, 1895 to 2026).
The month in words
- Tuesday 29 September 2026: a high of 71.2°F averaged over Custer County, MT, the warmest 29 September in the county average since 2025, 37th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 45.6°F averaged over Custer County, MT, the warmest 29 September night in the county average since 2025, 14th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Days of the month without a value
- 0
Nearby
Sheridan, WY 125.3 mi, the nearest city with its own station