East Missoula weather by month
What a typical year looks like in East Missoula, Montana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Missoula International Airport, 12 km from East Missoula; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 14.1 in358 mm
- Snow a year
- 43 in109 cm
- Last spring freeze
- May 13
- First fall freeze
- Sep 23
- Heating degree days
- 7,513
- Cooling degree days
- 307
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −4°−20° (heating, 99%) and 97°36° (cooling, 1%).
Month by month
East Missoula in January
Highs average 32°0° and lows 18°−8°, with 0.96 in24 mm of precipitation and 10 in25 cm of snow in a typical January.
- Record high
- 60°16° (1939)
- Record low
- −33°−36° (1957)
- Heating degree days
- 1246
- Cooling degree days
- 0
East Missoula in February
Highs average 37°3° and lows 21°−6°, with 0.88 in22 mm of precipitation and 9 in22 cm of snow in a typical February.
- Record high
- 66°19° (1995)
- Record low
- −28°−33° (1933)
- Heating degree days
- 1009
- Cooling degree days
- 0
East Missoula in March
Highs average 48°9° and lows 27°−3°, with 0.92 in23 mm of precipitation and 5 in13 cm of snow in a typical March.
- Record high
- 78°26° (2004)
- Record low
- −13°−25° (1955)
- Heating degree days
- 857
- Cooling degree days
- 0
East Missoula in April
Highs average 56°13° and lows 32°0°, with 1.4 in35 mm of precipitation and 1.3 in3.3 cm of snow in a typical April.
- Record high
- 90°32° (1910)
- Record low
- 2°−17° (1936)
- Heating degree days
- 624
- Cooling degree days
- 0
East Missoula in May
Highs average 66°19° and lows 40°4°, with 1.8 in45 mm of precipitation and 0.3 in0.8 cm of snow in a typical May.
- Record high
- 95°35° (1936)
- Record low
- 21°−6° (1954)
- Heating degree days
- 375
- Cooling degree days
- 3
East Missoula in June
Highs average 73°23° and lows 46°8°, with 2.1 in54 mm of precipitation in a typical June.
- Record high
- 102°39° (2015)
- Record low
- 26°−3° (1906)
- Heating degree days
- 185
- Cooling degree days
- 28
East Missoula in July
Highs average 85°30° and lows 52°11°, with 0.85 in22 mm of precipitation in a typical July.
- Record high
- 107°42° (2007)
- Record low
- 27°−3° (1901)
- Heating degree days
- 39
- Cooling degree days
- 146
East Missoula in August
Highs average 84°29° and lows 50°10°, with 0.83 in21 mm of precipitation in a typical August.
- Record high
- 105°41° (1961)
- Record low
- 25°−4° (1901)
- Heating degree days
- 47
- Cooling degree days
- 115
East Missoula in September
Highs average 73°23° and lows 42°6°, with 0.96 in24 mm of precipitation and 0.1 in0.3 cm of snow in a typical September.
- Record high
- 99°37° (1967)
- Record low
- 15°−9° (1926)
- Heating degree days
- 240
- Cooling degree days
- 15
East Missoula in OctoberThis month
Highs average 56°13° and lows 32°0°, with 1.2 in30 mm of precipitation and 0.9 in2.3 cm of snow in a typical October.
- Record high
- 85°29° (1963)
- Record low
- −7°−22° (2020)
- Heating degree days
- 649
- Cooling degree days
- 0
East Missoula in November
Highs average 40°4° and lows 25°−4°, with 1.2 in30 mm of precipitation and 5 in14 cm of snow in a typical November.
- Record high
- 73°23° (1999)
- Record low
- −23°−31° (1955)
- Heating degree days
- 982
- Cooling degree days
- 0
East Missoula in December
Highs average 31°−1° and lows 18°−8°, with 1.1 in27 mm of precipitation and 12 in29 cm of snow in a typical December.
- Record high
- 67°19° (2021)
- Record low
- −30°−34° (1964)
- Heating degree days
- 1260
- Cooling degree days
- 0