Parkman weather by month
What a typical year looks like in Parkman, Wyoming: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Dayton, 10 km from Parkman; records cover 2000–2026.
The year at a glance
- Precipitation a year
- 18 in458 mm
- Snow a year
- 68 in173 cm
- Last spring freeze
- May 24
- First fall freeze
- Sep 17
- Heating degree days
- 7,970
- Cooling degree days
- 294
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −17°−27° (heating, 99%) and 96°36° (cooling, 1%).
Month by month
Parkman in January
Highs average 36°2° and lows 10°−12°, with 0.82 in21 mm of precipitation and 11 in27 cm of snow in a typical January.
- Record high
- 69°21° (2005)
- Record low
- −35°−37° (2024)
- Heating degree days
- 1300
- Cooling degree days
- 0
Parkman in February
Highs average 38°3° and lows 12°−11°, with 0.89 in23 mm of precipitation and 11 in28 cm of snow in a typical February.
- Record high
- 76°24° (2026)
- Record low
- −38°−39° (2025)
- Heating degree days
- 1118
- Cooling degree days
- 0
Parkman in March
Highs average 47°8° and lows 20°−7°, with 1.5 in38 mm of precipitation and 12 in30 cm of snow in a typical March.
- Record high
- 82°28° (2025)
- Record low
- −27°−33° (2019)
- Heating degree days
- 977
- Cooling degree days
- 0
Parkman in April
Highs average 55°13° and lows 29°−2°, with 2.1 in52 mm of precipitation and 7 in18 cm of snow in a typical April.
- Record high
- 85°29° (2012)
- Record low
- −4°−20° (2002)
- Heating degree days
- 689
- Cooling degree days
- 0
Parkman in May
Highs average 65°18° and lows 38°3°, with 3.4 in85 mm of precipitation and 1.4 in3.6 cm of snow in a typical May.
- Record high
- 99°37° (2026)
- Record low
- 14°−10° (2005)
- Heating degree days
- 427
- Cooling degree days
- 4
Parkman in June
Highs average 75°24° and lows 45°7°, with 2 in51 mm of precipitation in a typical June.
- Record high
- 107°42° (2021)
- Record low
- 28°−2° (2009)
- Heating degree days
- 170
- Cooling degree days
- 21
Parkman in July
Highs average 85°30° and lows 51°11°, with 1.2 in29 mm of precipitation in a typical July.
- Record high
- 107°42° (2002)
- Record low
- 30°−1° (2022)
- Heating degree days
- 31
- Cooling degree days
- 130
Parkman in August
Highs average 84°29° and lows 50°10°, with 0.88 in22 mm of precipitation in a typical August.
- Record high
- 102°39° (2001)
- Record low
- 28°−2° (2022)
- Heating degree days
- 56
- Cooling degree days
- 118
Parkman in September
Highs average 73°23° and lows 40°5°, with 1.6 in39 mm of precipitation and 0.3 in0.8 cm of snow in a typical September.
- Record high
- 102°39° (2022)
- Record low
- 19°−7° (2014)
- Heating degree days
- 266
- Cooling degree days
- 19
Parkman in OctoberThis month
Highs average 59°15° and lows 30°−1°, with 1.9 in47 mm of precipitation and 6 in16 cm of snow in a typical October.
- Record high
- 90°32° (2011)
- Record low
- −9°−23° (2020)
- Heating degree days
- 637
- Cooling degree days
- 2
Parkman in November
Highs average 46°8° and lows 18°−8°, with 1.2 in29 mm of precipitation and 8 in19 cm of snow in a typical November.
- Record high
- 79°26° (2025)
- Record low
- −17°−27° (2010)
- Heating degree days
- 993
- Cooling degree days
- 0
Parkman in December
Highs average 36°2° and lows 10°−12°, with 0.82 in21 mm of precipitation and 12 in30 cm of snow in a typical December.
- Record high
- 76°24° (2021)
- Record low
- −39° (2016)
- Heating degree days
- 1306
- Cooling degree days
- 0