Yaak weather by month
What a typical year looks like in Yaak, Montana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Yaak 9nne, 14 km from Yaak; records cover 1998–2026.
The year at a glance
- Precipitation a year
- 22.8 in578 mm
- Snow a year
- Rare
- Last spring freeze
- Jun 13
- First fall freeze
- Aug 14
- Heating degree days
- 8,782
- Cooling degree days
- 60
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 94°34° (cooling, 1%).
Month by month
Yaak in January
Highs average 29°−1° and lows 14°−10°, with 2.3 in58 mm of precipitation in a typical January.
- Record high
- 55°13° (2024)
- Record low
- −46°−43° (2024)
- Heating degree days
- 1344
- Cooling degree days
- 0
Yaak in February
Highs average 36°2° and lows 14°−10°, with 1.7 in44 mm of precipitation in a typical February.
- Record high
- 56°13° (2005)
- Record low
- −29°−34° (2011)
- Heating degree days
- 1121
- Cooling degree days
- 0
Yaak in March
Highs average 44°7° and lows 22°−6°, with 2.3 in58 mm of precipitation in a typical March.
- Record high
- 72°22° (2004)
- Record low
- −30°−34° (2019)
- Heating degree days
- 988
- Cooling degree days
- 0
Yaak in April
Highs average 54°12° and lows 27°−3°, with 1.2 in31 mm of precipitation in a typical April.
- Record high
- 82°28° (2016)
- Record low
- 4°−16° (2008)
- Heating degree days
- 729
- Cooling degree days
- 0
Yaak in May
Highs average 65°18° and lows 35°2°, with 2.2 in55 mm of precipitation in a typical May.
- Record high
- 89°32° (2003)
- Record low
- 18°−8° (2008)
- Heating degree days
- 467
- Cooling degree days
- 0
Yaak in June
Highs average 71°22° and lows 41°5°, with 2.5 in65 mm of precipitation in a typical June.
- Record high
- 102°39° (2021)
- Record low
- 25°−4° (2009)
- Heating degree days
- 274
- Cooling degree days
- 4
Yaak in July
Highs average 81°27° and lows 43°6°, with 1.2 in30 mm of precipitation in a typical July.
- Record high
- 100°38° (2002)
- Record low
- 30°−1° (2008)
- Heating degree days
- 119
- Cooling degree days
- 30
Yaak in August
Highs average 81°27° and lows 42°6°, with 0.93 in24 mm of precipitation in a typical August.
- Record high
- 104°40° (2018)
- Record low
- 27°−3° (2005)
- Heating degree days
- 132
- Cooling degree days
- 25
Yaak in September
Highs average 70°21° and lows 35°2°, with 1.3 in33 mm of precipitation in a typical September.
- Record high
- 96°36° (2025)
- Record low
- 19°−7° (2005)
- Heating degree days
- 373
- Cooling degree days
- 1
Yaak in OctoberThis month
Highs average 53°11° and lows 28°−2°, with 1.7 in43 mm of precipitation in a typical October.
- Record high
- 79°26° (2003)
- Record low
- −11°−24° (2002)
- Heating degree days
- 769
- Cooling degree days
- 0
Yaak in November
Highs average 36°2° and lows 22°−6°, with 2.8 in70 mm of precipitation in a typical November.
- Record high
- 61°16° (2012)
- Record low
- −18°−28° (2010)
- Heating degree days
- 1092
- Cooling degree days
- 0
Yaak in December
Highs average 27°−3° and lows 15°−10°, with 2.7 in68 mm of precipitation in a typical December.
- Record high
- 50°10° (2021)
- Record low
- −39° (2022)
- Heating degree days
- 1374
- Cooling degree days
- 0