Sundance weather by month
What a typical year looks like in Sundance, Wyoming: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Sundance 8 Nnw, 14 km from Sundance; records cover 2007–2026.
The year at a glance
- Precipitation a year
- 29.2 in742 mm
- Snow a year
- Rare
- Last spring freeze
- May 27
- First fall freeze
- Sep 12
- Heating degree days
- 8,839
- Cooling degree days
- 157
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −12°−24° (heating, 99%) and 86°30° (cooling, 1%).
Month by month
Sundance in January
Highs average 32°0° and lows 15°−9°, with 1.6 in40 mm of precipitation in a typical January.
- Record high
- 60°16° (2015)
- Record low
- −39° (2024)
- Heating degree days
- 1293
- Cooling degree days
- 0
Sundance in February
Highs average 30°−1° and lows 15°−10°, with 2 in52 mm of precipitation in a typical February.
- Record high
- 57°14° (2017)
- Record low
- −28°−33° (2011)
- Heating degree days
- 1193
- Cooling degree days
- 0
Sundance in March
Highs average 39°4° and lows 23°−5°, with 2.6 in66 mm of precipitation in a typical March.
- Record high
- 75°24° (2026)
- Record low
- −21°−29° (2019)
- Heating degree days
- 1062
- Cooling degree days
- 0
Sundance in April
Highs average 46°8° and lows 28°−2°, with 3.6 in90 mm of precipitation in a typical April.
- Record high
- 74°23° (2012)
- Record low
- −1°−18° (2020)
- Heating degree days
- 838
- Cooling degree days
- 0
Sundance in May
Highs average 55°13° and lows 38°3°, with 3.9 in98 mm of precipitation in a typical May.
- Record high
- 83°28° (2009)
- Record low
- 18°−8° (2008)
- Heating degree days
- 576
- Cooling degree days
- 2
Sundance in June
Highs average 65°19° and lows 47°8°, with 2.9 in74 mm of precipitation in a typical June.
- Record high
- 92°33° (2012)
- Record low
- 27°−3° (2024)
- Heating degree days
- 281
- Cooling degree days
- 11
Sundance in July
Highs average 75°24° and lows 53°12°, with 2.4 in62 mm of precipitation in a typical July.
- Record high
- 95°35° (2021)
- Record low
- 36°2° (2023)
- Heating degree days
- 91
- Cooling degree days
- 60
Sundance in August
Highs average 74°23° and lows 52°11°, with 1.9 in49 mm of precipitation in a typical August.
- Record high
- 91°33° (2012)
- Record low
- 35°2° (2026)
- Heating degree days
- 118
- Cooling degree days
- 61
Sundance in September
Highs average 65°19° and lows 44°7°, with 1.7 in43 mm of precipitation in a typical September.
- Record high
- 92°33° (2022)
- Record low
- 19°−7° (2014)
- Heating degree days
- 327
- Cooling degree days
- 22
Sundance in OctoberThis month
Highs average 50°10° and lows 33°0°, with 3.1 in78 mm of precipitation in a typical October.
- Record high
- 81°27° (2011)
- Record low
- −3°−19° (2020)
- Heating degree days
- 740
- Cooling degree days
- 1
Sundance in November
Highs average 39°4° and lows 23°−5°, with 1.8 in45 mm of precipitation in a typical November.
- Record high
- 67°19° (2010)
- Record low
- −13°−25° (2014)
- Heating degree days
- 1020
- Cooling degree days
- 0
Sundance in December
Highs average 30°−1° and lows 16°−9°, with 1.7 in44 mm of precipitation in a typical December.
- Record high
- 59°15° (2021)
- Record low
- −32°−36° (2022)
- Heating degree days
- 1300
- Cooling degree days
- 0