Weather on September 17
Kalispell, MT
55 Years of Data
About This Date
September 17th in Kalispell, MT typically brings mild fall weather, with average highs around 69°F and lows near 39°F — a 30°F daily swing. Over 55 years of records, the warmest September 17th was in 1981 (70°F average), while the coldest was 1978 (43°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 38% of September 17th dates historically, with the wettest September 17th recording 2.16" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for September 17th in Kalispell, MT? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 80° | 44° | 62° | — | — |
| 2024 | 74° | 45° | 59° | — | — |
| 2023 | 78° | 38° | 58° | — | — |
| 2022 | 71° | 31° | 51° | — | — |
| 2021 | 71° | 28° | 50° | — | — |
| 2020 | 76° | 36° | 56° | — | — |
| 2019 | 62° | 40° | 51° | 0.18" | — |
| 2018 | 66° | 35° | 51° | — | — |
| 2017 | 66° | 27° | 47° | — | — |
| 2016 | 67° | 43° | 55° | 0.13" | — |
| 2015 | 62° | 24° | 43° | — | — |
| 2014 | 81° | 44° | 62° | — | — |
| 2013 | 73° | 37° | 55° | 0.36" | — |
| 2012 | 75° | 36° | 55° | — | — |
| 2011 | 64° | 33° | 49° | — | — |
| 2010 | 55° | 41° | 48° | 0.41" | — |
| 2009 | 79° | 46° | 62° | 0.1" | — |
| 2008 | 81° | 39° | 60° | — | — |
| 2007 | 66° | 46° | 56° | 0.08" | — |
| 2006 | 63° | 34° | 48° | — | — |
| 2005 | 65° | 44° | 54° | 0.03" | — |
| 2004 | 60° | 46° | 53° | — | — |
| 2003 | 51° | 38° | 44° | 0.03" | — |
| 2002 | 57° | 49° | 53° | 1.45" | — |
| 2001 | 77° | 44° | 61° | — | — |
| 2000 | 81° | 46° | 63° | — | — |
| 1999 | 80° | 36° | 58° | — | — |
| 1998 | 82° | 46° | 64° | 0.51" | — |
| 1997 | 57° | 46° | 52° | 0.2" | — |
| 1996 | 52° | 38° | 45° | 1.27" | — |
| 1995 | 79° | 42° | 60° | — | — |
| 1994 | 80° | 38° | 59° | — | — |
| 1993 | 66° | 32° | 49° | — | — |
| 1992 | 63° | 33° | 48° | — | — |
| 1991 | 66° | 38° | 52° | — | — |
| 1990 | 70° | 41° | 55° | — | — |
| 1989 | 58° | 48° | 53° | 1.3" | — |
| 1988 | 48° | 37° | 43° | 1.5" | — |
| 1987 | 65° | 27° | 46° | — | — |
| 1986 | 64° | 42° | 53° | — | — |
| 1985 | 53° | 41° | 47° | 2.16" | — |
| 1984 | 83° | 37° | 60° | — | — |
| 1983 | 59° | 40° | 49° | 0.05" | — |
| 1982 | 71° | 33° | 52° | — | — |
| 1981warmest | 89° | 50° | 70° | — | — |
| 1980 | 72° | 43° | 57° | 0.03" | — |
| 1979 | 80° | 37° | 59° | — | — |
| 1978coldest | 58° | 28° | 43° | — | — |
| 1977 | 62° | 42° | 52° | 1.65" | — |
| 1976 | 81° | 53° | 67° | 0.03" | — |
| 1975 | 64° | 46° | 55° | 1.07" | — |
| 1974 | 77° | 40° | 58° | — | — |
| 1973 | 65° | 31° | 48° | — | — |
| 1972 | 66° | 50° | 58° | 0.08" | — |
| 1971 | 63° | 29° | 46° | — | — |