Gillette Weather in December
Average highs run from 39°F on December 1 to 35°F on December 31, and lows from 19°F to 15°F. Normal precipitation for the month is 0.64 in over about 7 wet days.
December day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 36°F
- Average low
- 16°F
- Precipitation
- 0.64 in
- Snowfall
- 8.4 in
- Record high
- 75°FDec 1, 2021
- Record low
- -29°FDec 21, 2022
- Chance of a freeze
- 100%
- Daylight
- 9 h 06 min to 8 h 55 min
- Cloud cover
- 66%
- Humidity
- 72%
- Dew point
- 17°F
- Wind
- 10.5 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Dec 1 | 39°F | 19°F | 75°F 2021 | -3°F 2007 | 21% | 16% |
| Dec 2 | 39°F | 19°F | 68°F 2021 | -10°F 2007 | 21% | 16% |
| Dec 3 | 38°F | 18°F | 61°F 2024 | -5°F 2009 | 21% | 17% |
| Dec 4 | 38°F | 18°F | 61°F 2007 | 1°F 2008 | 21% | 17% |
| Dec 5 | 38°F | 18°F | 58°F 2012 | -7°F 2011 | 21% | 17% |
| Dec 6 | 37°F | 18°F | 60°F 2023 | -15°F 2005 | 21% | 17% |
| Dec 7 | 37°F | 17°F | 61°F 2024 | -22°F 2005 | 21% | 17% |
| Dec 8 | 37°F | 17°F | 66°F 2020 | -19°F 2016 | 21% | 18% |
| Dec 9 | 36°F | 17°F | 64°F 2020 | -18°F 2009 | 21% | 18% |
| Dec 10 | 36°F | 17°F | 60°F 2014 | -11°F 2000 | 21% | 18% |
| Dec 11 | 36°F | 16°F | 60°F 2014 | -20°F 2000 | 21% | 18% |
| Dec 12 | 36°F | 16°F | 65°F 2014 | -12°F 2000 | 22% | 19% |
| Dec 13 | 35°F | 16°F | 61°F 2014 | -10°F 2008 | 22% | 19% |
| Dec 14 | 35°F | 16°F | 60°F 1998 | -20°F 2008 | 22% | 19% |
| Dec 15 | 35°F | 16°F | 63°F 2025 | -21°F 2008 | 22% | 19% |
| Dec 16 | 35°F | 16°F | 60°F 2023 | -13°F 2000 | 22% | 19% |
| Dec 17 | 35°F | 15°F | 59°F 2025 | -24°F 2016 | 22% | 20% |
| Dec 18 | 35°F | 15°F | 57°F 2023 | -18°F 2016 | 23% | 20% |
| Dec 19 | 35°F | 15°F | 59°F 2023 | -12°F 1998 | 23% | 20% |
| Dec 20 | 35°F | 15°F | 59°F 2023 | -24°F 1998 | 23% | 20% |
| Dec 21 | 35°F | 15°F | 62°F 2024 | -29°F 2022 | 23% | 21% |
| Dec 22 | 35°F | 15°F | 59°F 2020 | -29°F 2022 | 23% | 21% |
| Dec 23 | 35°F | 15°F | 61°F 2025 | -26°F 2022 | 23% | 21% |
| Dec 24 | 35°F | 15°F | 65°F 2025 | -10°F 2009 | 23% | 21% |
| Dec 25 | 35°F | 15°F | 55°F 2005 | -6°F 2017 | 24% | 21% |
| Dec 26 | 35°F | 15°F | 54°F 2005 | -4°F 2014 | 24% | 21% |
| Dec 27 | 35°F | 15°F | 53°F 2006 | -11°F 2021 | 24% | 21% |
| Dec 28 | 35°F | 15°F | 60°F 2002 | -6°F 2025 | 24% | 21% |
| Dec 29 | 35°F | 15°F | 56°F 2002 | -16°F 2014 | 24% | 21% |
| Dec 30 | 35°F | 15°F | 48°F 2023 | -22°F 2014 | 24% | 22% |
| Dec 31 | 35°F | 15°F | 54°F 2025 | -17°F 2017 | 24% | 22% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- December 1
- sunrise 7:18 AM, sunset 4:24 PM
- December 31
- sunrise 7:38 AM, sunset 4:33 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00483855 (Gillette 4SE), public domain. Records: NOAA GHCN-Daily, station USW00094023, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.