Dewey County Weather in December
Average highs run from 35°F on December 1 to 27°F on December 31, and lows from 16°F to 8°F. Normal precipitation for the month is 0.57 in over about 5 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
- 30°F
- Average low
- 11°F
- Precipitation
- 0.57 in
- Snowfall
- 8.3 in
- Record high
- 71°FDec 1, 2021
- Record low
- -30°FDec 31, 2017
- Chance of a freeze
- 100%
- Daylight
- 9 h 01 min to 8 h 49 min
- Cloud cover
- 64%
- Humidity
- 79%
- Dew point
- 17°F
- Wind
- 11.2 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 | 35°F | 16°F | 71°F 2021 | -8°F 2014 | 15% | 13% |
| Dec 2 | 35°F | 16°F | 54°F 2012 | 0°F 2006 | 15% | 14% |
| Dec 3 | 35°F | 15°F | 54°F 1998 | -11°F 2006 | 15% | 14% |
| Dec 4 | 34°F | 15°F | 54°F 2020 | -9°F 2005 | 15% | 14% |
| Dec 5 | 34°F | 14°F | 58°F 2020 | -20°F 2005 | 15% | 14% |
| Dec 6 | 33°F | 14°F | 61°F 2023 | -15°F 2013 | 16% | 14% |
| Dec 7 | 33°F | 14°F | 60°F 2024 | -20°F 2013 | 16% | 14% |
| Dec 8 | 33°F | 13°F | 63°F 2020 | -10°F 2013 | 16% | 15% |
| Dec 9 | 32°F | 13°F | 57°F 2015 | -13°F 2013 | 16% | 15% |
| Dec 10 | 32°F | 13°F | 51°F 2015 | -11°F 2000 | 16% | 15% |
| Dec 11 | 31°F | 13°F | 54°F 2004 | -20°F 2013 | 16% | 15% |
| Dec 12 | 31°F | 12°F | 54°F 2017 | -20°F 2000 | 16% | 15% |
| Dec 13 | 31°F | 12°F | 51°F 2017 | -14°F 2000 | 16% | 15% |
| Dec 14 | 30°F | 12°F | 59°F 1998 | -15°F 2016 | 16% | 15% |
| Dec 15 | 30°F | 11°F | 55°F 2018 | -20°F 2009 | 16% | 16% |
| Dec 16 | 30°F | 11°F | 50°F 2002 | -19°F 2008 | 17% | 16% |
| Dec 17 | 29°F | 11°F | 57°F 2004 | -28°F 2016 | 17% | 16% |
| Dec 18 | 29°F | 11°F | 60°F 2011 | -26°F 2016 | 17% | 16% |
| Dec 19 | 29°F | 10°F | 51°F 2018 | -12°F 2022 | 17% | 16% |
| Dec 20 | 29°F | 10°F | 48°F 2003 | -13°F 2013 | 17% | 16% |
| Dec 21 | 28°F | 10°F | 50°F 2020 | -19°F 2022 | 17% | 17% |
| Dec 22 | 28°F | 10°F | 53°F 2023 | -19°F 2022 | 18% | 17% |
| Dec 23 | 28°F | 9°F | 47°F 2021 | -25°F 2013 | 18% | 17% |
| Dec 24 | 28°F | 9°F | 50°F 1999 | -23°F 2000 | 18% | 17% |
| Dec 25 | 28°F | 9°F | 51°F 1999 | -10°F 2000 | 18% | 17% |
| Dec 26 | 27°F | 9°F | 52°F 2005 | -13°F 2017 | 18% | 17% |
| Dec 27 | 27°F | 9°F | 53°F 2024 | -11°F 2017 | 18% | 17% |
| Dec 28 | 27°F | 8°F | 54°F 1999 | -16°F 2021 | 18% | 17% |
| Dec 29 | 27°F | 8°F | 55°F 1999 | -16°F 2021 | 19% | 18% |
| Dec 30 | 27°F | 8°F | 46°F 1999 | -18°F 2017 | 19% | 18% |
| Dec 31 | 27°F | 8°F | 50°F 1999 | -30°F 2017 | 19% | 18% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- December 1
- sunrise 7:02 AM, sunset 4:03 PM
- December 31
- sunrise 7:22 AM, sunset 4:11 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00398307 (Timber Lake), public domain. Records: NOAA GHCN-Daily, station USW00094052, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.