Basin weather by month
What a typical year looks like in Basin, Wyoming: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Basin, 1 km from Basin; records cover 1898–2026.
The year at a glance
- Precipitation a year
- 7.2 in182 mm
- Snow a year
- 20 in51 cm
- Last spring freeze
- May 8
- First fall freeze
- Sep 22
- Heating degree days
- 6,765
- Cooling degree days
- 950
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −15°−26° (heating, 99%) and 100°38° (cooling, 1%).
Month by month
Basin in January
Highs average 32°0° and lows 9°−13°, with 0.24 in6.1 mm of precipitation and 3 in9 cm of snow in a typical January.
- Record high
- 64°18° (1931)
- Record low
- −43°−42° (1951)
- Heating degree days
- 1376
- Cooling degree days
- 0
Basin in February
Highs average 39°4° and lows 15°−10°, with 0.32 in8.1 mm of precipitation and 4 in10 cm of snow in a typical February.
- Record high
- 73°23° (1982)
- Record low
- −51°−46° (1899)
- Heating degree days
- 1068
- Cooling degree days
- 0
Basin in March
Highs average 54°12° and lows 27°−3°, with 0.31 in7.9 mm of precipitation and 2.3 in5.8 cm of snow in a typical March.
- Record high
- 86°30° (2026)
- Record low
- −31°−35° (1922)
- Heating degree days
- 752
- Cooling degree days
- 0
Basin in April
Highs average 63°17° and lows 37°3°, with 0.75 in19 mm of precipitation and 1.5 in3.8 cm of snow in a typical April.
- Record high
- 90°32° (1939)
- Record low
- −4°−20° (1936)
- Heating degree days
- 460
- Cooling degree days
- 3
Basin in May
Highs average 73°23° and lows 47°8°, with 1.4 in35 mm of precipitation and 0.1 in0.3 cm of snow in a typical May.
- Record high
- 99°37° (1936)
- Record low
- 18°−8° (1954)
- Heating degree days
- 205
- Cooling degree days
- 44
Basin in June
Highs average 84°29° and lows 55°13°, with 1 in26 mm of precipitation in a typical June.
- Record high
- 110°43° (1981)
- Record low
- 30°−1° (1906)
- Heating degree days
- 42
- Cooling degree days
- 168
Basin in July
Highs average 93°34° and lows 60°16°, with 0.41 in10 mm of precipitation in a typical July.
- Record high
- 112°44° (1900)
- Record low
- 36°2° (1913)
- Heating degree days
- 4
- Cooling degree days
- 360
Basin in August
Highs average 91°33° and lows 57°14°, with 0.32 in8.1 mm of precipitation in a typical August.
- Record high
- 115°46° (1983)
- Record low
- 34°1° (1920)
- Heating degree days
- 11
- Cooling degree days
- 293
Basin in September
Highs average 79°26° and lows 48°9°, with 0.95 in24 mm of precipitation and 0.2 in0.5 cm of snow in a typical September.
- Record high
- 102°39° (1950)
- Record low
- 14°−10° (1926)
- Heating degree days
- 127
- Cooling degree days
- 78
Basin in OctoberThis month
Highs average 63°17° and lows 36°2°, with 0.79 in20 mm of precipitation and 1.5 in3.8 cm of snow in a typical October.
- Record high
- 91°33° (2011)
- Record low
- −7°−22° (2020)
- Heating degree days
- 494
- Cooling degree days
- 4
Basin in November
Highs average 46°8° and lows 23°−5°, with 0.36 in9.1 mm of precipitation and 3 in8 cm of snow in a typical November.
- Record high
- 77°25° (1999)
- Record low
- −28°−33° (1959)
- Heating degree days
- 912
- Cooling degree days
- 0
Basin in December
Highs average 34°1° and lows 11°−11°, with 0.3 in7.6 mm of precipitation and 4 in10 cm of snow in a typical December.
- Record high
- 67°19° (1995)
- Record low
- −43°−42° (1978)
- Heating degree days
- 1314
- Cooling degree days
- 0