Stanley weather by month
What a typical year looks like in Stanley, Idaho: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Stanley, 1 km from Stanley; records cover 1916–2026.
The year at a glance
- Precipitation a year
- 18.2 in462 mm
- Snow a year
- Rare
- Last spring freeze
- Jun 27
- First fall freeze
- Jul 3
- Heating degree days
- 11,134
- Cooling degree days
- 6
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −27°−33° (heating, 99%) and 89°32° (cooling, 1%).
Month by month
Stanley in January
Highs average 26°−4° and lows −3°−19°, with 1.8 in46 mm of precipitation in a typical January.
- Record high
- 54°12° (1971)
- Record low
- −46°−43° (1978)
- Heating degree days
- 1663
- Cooling degree days
- 0
Stanley in February
Highs average 33°0° and lows −1°−18°, with 1.4 in37 mm of precipitation in a typical February.
- Record high
- 56°13° (1977)
- Record low
- −47°−44° (1982)
- Heating degree days
- 1375
- Cooling degree days
- 0
Stanley in March
Highs average 43°6° and lows 9°−13°, with 2 in51 mm of precipitation in a typical March.
- Record high
- 68°20° (2026)
- Record low
- −34°−37° (1917)
- Heating degree days
- 1222
- Cooling degree days
- 0
Stanley in April
Highs average 50°10° and lows 18°−8°, with 1.7 in43 mm of precipitation in a typical April.
- Record high
- 77°25° (1987)
- Record low
- −18°−28° (1920)
- Heating degree days
- 932
- Cooling degree days
- 0
Stanley in May
Highs average 60°16° and lows 26°−3°, with 1.7 in42 mm of precipitation in a typical May.
- Record high
- 87°31° (2003)
- Record low
- 8°−13° (1982)
- Heating degree days
- 676
- Cooling degree days
- 0
Stanley in June
Highs average 69°20° and lows 31°0°, with 1.5 in38 mm of precipitation in a typical June.
- Record high
- 93°34° (2015)
- Record low
- 12°−11° (1923)
- Heating degree days
- 452
- Cooling degree days
- 0
Stanley in July
Highs average 80°27° and lows 34°1°, with 0.62 in16 mm of precipitation in a typical July.
- Record high
- 98°37° (2002)
- Record low
- 15°−9° (1918)
- Heating degree days
- 250
- Cooling degree days
- 4
Stanley in August
Highs average 79°26° and lows 32°0°, with 0.55 in14 mm of precipitation in a typical August.
- Record high
- 95°35° (1992)
- Record low
- 12°−11° (1924)
- Heating degree days
- 296
- Cooling degree days
- 2
Stanley in September
Highs average 70°21° and lows 25°−4°, with 1 in26 mm of precipitation in a typical September.
- Record high
- 92°33° (2017)
- Record low
- 1°−17° (1926)
- Heating degree days
- 521
- Cooling degree days
- 0
Stanley in OctoberThis month
Highs average 56°13° and lows 19°−7°, with 1.6 in41 mm of precipitation in a typical October.
- Record high
- 84°29° (2010)
- Record low
- −11°−24° (2019)
- Heating degree days
- 857
- Cooling degree days
- 0
Stanley in November
Highs average 38°4° and lows 10°−12°, with 2 in51 mm of precipitation in a typical November.
- Record high
- 67°19° (2020)
- Record low
- −30°−34° (1919)
- Heating degree days
- 1230
- Cooling degree days
- 0
Stanley in December
Highs average 25°−4° and lows −2°−19°, with 2.3 in59 mm of precipitation in a typical December.
- Record high
- 60°16° (1918)
- Record low
- −54°−48° (1983)
- Heating degree days
- 1660
- Cooling degree days
- 0