Willow Creek weather by month
What a typical year looks like in Willow Creek, Montana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Logan Landfill, 20 km from Willow Creek; records cover 2008–2026.
The year at a glance
- Precipitation a year
- 15.5 in394 mm
- Snow a year
- Rare
- Last spring freeze
- May 22
- First fall freeze
- Sep 12
- Heating degree days
- 8,289
- Cooling degree days
- 196
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −16°−27° (heating, 99%) and 95°35° (cooling, 1%).
Month by month
Willow Creek in January
Highs average 33°0° and lows 10°−12°, with 0.39 in9.9 mm of precipitation in a typical January.
- Record high
- 59°15° (2012)
- Record low
- −44°−42° (2024)
- Heating degree days
- 1362
- Cooling degree days
- 0
Willow Creek in February
Highs average 37°3° and lows 13°−10°, with 0.44 in11 mm of precipitation in a typical February.
- Record high
- 63°17° (2026)
- Record low
- −32°−36° (2014)
- Heating degree days
- 1118
- Cooling degree days
- 0
Willow Creek in March
Highs average 46°8° and lows 21°−6°, with 1 in25 mm of precipitation in a typical March.
- Record high
- 80°27° (2026)
- Record low
- −12°−24° (2019)
- Heating degree days
- 978
- Cooling degree days
- 0
Willow Creek in April
Highs average 55°13° and lows 29°−2°, with 1.6 in40 mm of precipitation in a typical April.
- Record high
- 83°28° (2018)
- Record low
- 1°−17° (2018)
- Heating degree days
- 698
- Cooling degree days
- 0
Willow Creek in May
Highs average 64°18° and lows 36°2°, with 2.7 in68 mm of precipitation in a typical May.
- Record high
- 92°33° (2026)
- Record low
- 18°−8° (2010)
- Heating degree days
- 459
- Cooling degree days
- 0
Willow Creek in June
Highs average 73°23° and lows 44°7°, with 2.8 in72 mm of precipitation in a typical June.
- Record high
- 101°38° (2021)
- Record low
- 23°−5° (2018)
- Heating degree days
- 215
- Cooling degree days
- 17
Willow Creek in July
Highs average 85°29° and lows 49°10°, with 1.3 in34 mm of precipitation in a typical July.
- Record high
- 106°41° (2026)
- Record low
- 32°0° (2016)
- Heating degree days
- 46
- Cooling degree days
- 102
Willow Creek in August
Highs average 83°28° and lows 46°8°, with 1.2 in30 mm of precipitation in a typical August.
- Record high
- 104°40° (2026)
- Record low
- 31°−1° (2015)
- Heating degree days
- 75
- Cooling degree days
- 66
Willow Creek in September
Highs average 73°23° and lows 39°4°, with 1.4 in35 mm of precipitation in a typical September.
- Record high
- 99°37° (2022)
- Record low
- 24°−4° (2014)
- Heating degree days
- 284
- Cooling degree days
- 11
Willow Creek in OctoberThis month
Highs average 58°14° and lows 28°−2°, with 1.2 in31 mm of precipitation in a typical October.
- Record high
- 90°32° (2011)
- Record low
- −16°−27° (2020)
- Heating degree days
- 679
- Cooling degree days
- 0
Willow Creek in November
Highs average 42°6° and lows 19°−7°, with 0.83 in21 mm of precipitation in a typical November.
- Record high
- 74°23° (2020)
- Record low
- −21°−29° (2014)
- Heating degree days
- 1036
- Cooling degree days
- 0
Willow Creek in December
Highs average 32°0° and lows 11°−11°, with 0.62 in16 mm of precipitation in a typical December.
- Record high
- 69°21° (2021)
- Record low
- −39° (2022)
- Heating degree days
- 1339
- Cooling degree days
- 0