Sidney Weather in December
Average highs run from 45°F on December 1 to 41°F on December 31, and lows from 16°F to 13°F. Normal precipitation for the month is 0.20 in over about 3 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
- 42°F
- Average low
- 14°F
- Precipitation
- 0.20 in
- Snowfall
- 5.7 in
- Record high
- 78°FDec 2, 2021
- Record low
- -23°FDec 21, 1983
- Chance of a freeze
- 100%
- Daylight
- 9 h 26 min to 9 h 16 min
- Cloud cover
- 60%
- Humidity
- 62%
- Dew point
- 18°F
- Wind
- 11.4 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 | 45°F | 16°F | 74°F 2021 | -16°F 1985 | 11% | 6% |
| Dec 2 | 45°F | 16°F | 78°F 2021 | -6°F 1985 | 11% | 6% |
| Dec 3 | 44°F | 16°F | 69°F 1959 | -6°F 1978 | 11% | 6% |
| Dec 4 | 44°F | 15°F | 66°F 1975 | -5°F 2009 | 11% | 6% |
| Dec 5 | 44°F | 15°F | 71°F 1980 | -14°F 1972 | 11% | 6% |
| Dec 6 | 43°F | 15°F | 71°F 2023 | -22°F 1972 | 11% | 6% |
| Dec 7 | 43°F | 15°F | 70°F 1981 | -16°F 2005 | 11% | 6% |
| Dec 8 | 43°F | 14°F | 67°F 2020 | -17°F 1972 | 11% | 6% |
| Dec 9 | 42°F | 14°F | 71°F 2015 | -16°F 1972 | 11% | 6% |
| Dec 10 | 42°F | 14°F | 66°F 1968 | -16°F 1972 | 11% | 6% |
| Dec 11 | 42°F | 14°F | 69°F 2025 | -18°F 1985 | 11% | 6% |
| Dec 12 | 42°F | 14°F | 66°F 2017 | -10°F 1961 | 11% | 6% |
| Dec 13 | 41°F | 13°F | 63°F 1980 | -10°F 1985 | 11% | 6% |
| Dec 14 | 41°F | 13°F | 65°F 1969 | -10°F 2008 | 11% | 6% |
| Dec 15 | 41°F | 13°F | 65°F 2002 | -16°F 2008 | 11% | 6% |
| Dec 16 | 41°F | 13°F | 68°F 1962 | -12°F 1964 | 11% | 6% |
| Dec 17 | 41°F | 13°F | 65°F 1962 | -18°F 1964 | 11% | 6% |
| Dec 18 | 41°F | 13°F | 72°F 1980 | -21°F 1983 | 11% | 6% |
| Dec 19 | 41°F | 13°F | 69°F 2025 | -8°F 1951 | 11% | 6% |
| Dec 20 | 41°F | 13°F | 66°F 2003 | -21°F 1983 | 11% | 6% |
| Dec 21 | 40°F | 13°F | 68°F 1981 | -23°F 1983 | 11% | 6% |
| Dec 22 | 40°F | 13°F | 77°F 2025 | -21°F 1998 | 11% | 6% |
| Dec 23 | 40°F | 12°F | 68°F 1964 | -17°F 1983 | 11% | 6% |
| Dec 24 | 40°F | 12°F | 72°F 2025 | -23°F 2017 | 11% | 6% |
| Dec 25 | 40°F | 12°F | 68°F 2025 | -10°F 1948 | 11% | 6% |
| Dec 26 | 40°F | 12°F | 67°F 2005 | -14°F 1948 | 11% | 6% |
| Dec 27 | 40°F | 12°F | 66°F 1980 | -9°F 2017 | 11% | 6% |
| Dec 28 | 40°F | 12°F | 72°F 1980 | -8°F 2014 | 11% | 6% |
| Dec 29 | 41°F | 12°F | 65°F 2011 | -7°F 1968 | 11% | 6% |
| Dec 30 | 41°F | 13°F | 62°F 2011 | -22°F 1968 | 11% | 6% |
| Dec 31 | 41°F | 13°F | 65°F 1980 | -21°F 2014 | 10% | 6% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- December 1
- sunrise 6:58 AM, sunset 4:24 PM
- December 31
- sunrise 7:17 AM, sunset 4:33 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00024030 (Sidney Muni AP), public domain. Records: NOAA GHCN-Daily, station USW00024030, 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.