Cascade Weather in December
Average highs run from 35°F on December 1 to 30°F on December 31, and lows from 20°F to 14°F. Normal precipitation for the month is 3.51 in over about 16 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
- 32°F
- Average low
- 16°F
- Precipitation
- 3.51 in
- Snowfall
- 26.4 in
- Record high
- 53°FDec 1, 2021
- Record low
- -22°FDec 21, 1998
- Chance of a freeze
- 100%
- Daylight
- 9 h 05 min to 8 h 53 min
- Cloud cover
- 66%
- Humidity
- 89%
- Dew point
- 19°F
- Wind
- 5.8 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 | 20°F | 53°F 2021 | -2°F 2015 | 52% | 29% |
| Dec 2 | 35°F | 20°F | 49°F 2021 | -3°F 1997 | 52% | 30% |
| Dec 3 | 34°F | 19°F | 46°F 2021 | -6°F 2022 | 52% | 30% |
| Dec 4 | 34°F | 19°F | 44°F 2021 | -4°F 2018 | 52% | 30% |
| Dec 5 | 34°F | 19°F | 47°F 2023 | -5°F 2018 | 52% | 31% |
| Dec 6 | 33°F | 18°F | 46°F 2023 | -10°F 2018 | 52% | 31% |
| Dec 7 | 33°F | 18°F | 42°F 2015 | -15°F 2005 | 52% | 31% |
| Dec 8 | 33°F | 18°F | 45°F 2015 | -15°F 2005 | 52% | 32% |
| Dec 9 | 32°F | 18°F | 46°F 2015 | -11°F 2009 | 51% | 32% |
| Dec 10 | 32°F | 17°F | 47°F 2025 | -15°F 2009 | 51% | 32% |
| Dec 11 | 32°F | 17°F | 45°F 2025 | -9°F 2009 | 51% | 33% |
| Dec 12 | 32°F | 17°F | 49°F 2025 | -3°F 1997 | 51% | 33% |
| Dec 13 | 32°F | 16°F | 49°F 2025 | -2°F 2020 | 51% | 33% |
| Dec 14 | 31°F | 16°F | 48°F 2002 | -4°F 2005 | 51% | 33% |
| Dec 15 | 31°F | 16°F | 46°F 2002 | -7°F 2005 | 51% | 34% |
| Dec 16 | 31°F | 16°F | 48°F 2025 | -11°F 2008 | 50% | 34% |
| Dec 17 | 31°F | 15°F | 47°F 2025 | -16°F 2016 | 50% | 34% |
| Dec 18 | 31°F | 15°F | 41°F 2024 | -16°F 2016 | 50% | 34% |
| Dec 19 | 31°F | 15°F | 40°F 2025 | -6°F 1997 | 50% | 34% |
| Dec 20 | 30°F | 15°F | 42°F 2023 | -12°F 1998 | 50% | 34% |
| Dec 21 | 30°F | 15°F | 43°F 2019 | -22°F 1998 | 49% | 34% |
| Dec 22 | 30°F | 15°F | 48°F 2019 | -17°F 2022 | 49% | 34% |
| Dec 23 | 30°F | 14°F | 43°F 2025 | -12°F 1998 | 49% | 34% |
| Dec 24 | 30°F | 14°F | 47°F 2025 | -14°F 2017 | 49% | 34% |
| Dec 25 | 30°F | 14°F | 42°F 2005 | -10°F 2001 | 49% | 34% |
| Dec 26 | 30°F | 14°F | 43°F 2022 | -11°F 2001 | 49% | 34% |
| Dec 27 | 30°F | 14°F | 46°F 2022 | -5°F 2003 | 49% | 34% |
| Dec 28 | 30°F | 14°F | 43°F 2011 | -2°F 2000 | 48% | 34% |
| Dec 29 | 30°F | 14°F | 42°F 2011 | -5°F 2020 | 48% | 34% |
| Dec 30 | 30°F | 14°F | 42°F 2017 | -9°F 2003 | 48% | 34% |
| Dec 31 | 30°F | 14°F | 39°F 2005 | -11°F 2010 | 48% | 34% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- December 1
- sunrise 8:01 AM, sunset 5:06 PM
- December 31
- sunrise 8:21 AM, sunset 5:14 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00101514 (Cascade 1 Nw), public domain. Records: NOAA GHCN-Daily, station USW00094182, 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.