Whatcom County Weather in December
Average highs run from 40°F on December 1 to 36°F on December 31, and lows from 32°F to 29°F. Normal precipitation for the month is 14.15 in over about 21 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
- 37°F
- Average low
- 30°F
- Precipitation
- 14.15 in
- Snowfall
- 12.9 in
- Record high
- 67°FDec 10, 2014
- Record low
- -1°FDec 16, 1964
- Chance of a freeze
- 100%
- Daylight
- 8 h 33 min to 8 h 20 min
- Cloud cover
- 73%
- Humidity
- 95%
- Dew point
- 27°F
- Wind
- 4.3 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 | 40°F | 32°F | 61°F 1958 | 17°F 2022 | 69% | 10% |
| Dec 2 | 39°F | 32°F | 60°F 2015 | 20°F 2022 | 69% | 11% |
| Dec 3 | 39°F | 31°F | 62°F 2015 | 20°F 1994 | 69% | 11% |
| Dec 4 | 39°F | 31°F | 59°F 2023 | 15°F 1956 | 68% | 12% |
| Dec 5 | 39°F | 31°F | 59°F 2023 | 15°F 1956 | 68% | 12% |
| Dec 6 | 39°F | 31°F | 60°F 2024 | 12°F 1980 | 68% | 13% |
| Dec 7 | 38°F | 31°F | 59°F 2020 | 8°F 1980 | 68% | 13% |
| Dec 8 | 38°F | 31°F | 62°F 2014 | 9°F 1972 | 68% | 13% |
| Dec 9 | 38°F | 30°F | 63°F 2014 | 11°F 1972 | 68% | 14% |
| Dec 10 | 38°F | 30°F | 67°F 2014 | 7°F 1972 | 68% | 14% |
| Dec 11 | 38°F | 30°F | 59°F 2014 | 20°F 1949 | 68% | 14% |
| Dec 12 | 38°F | 30°F | 61°F 1952 | 17°F 1972 | 68% | 15% |
| Dec 13 | 37°F | 30°F | 62°F 1969 | 15°F 1972 | 68% | 15% |
| Dec 14 | 37°F | 30°F | 63°F 1962 | 18°F 2008 | 68% | 15% |
| Dec 15 | 37°F | 30°F | 62°F 1962 | 2°F 1964 | 68% | 16% |
| Dec 16 | 37°F | 30°F | 59°F 2018 | -1°F 1964 | 68% | 16% |
| Dec 17 | 37°F | 30°F | 57°F 1976 | 6°F 1964 | 68% | 16% |
| Dec 18 | 37°F | 29°F | 56°F 1972 | 15°F 1984 | 68% | 16% |
| Dec 19 | 37°F | 29°F | 58°F 1959 | 12°F 1990 | 68% | 17% |
| Dec 20 | 37°F | 29°F | 59°F 1958 | 11°F 1990 | 68% | 17% |
| Dec 21 | 37°F | 29°F | 60°F 1950 | 8°F 1990 | 68% | 17% |
| Dec 22 | 36°F | 29°F | 59°F 1986 | 10°F 1998 | 68% | 17% |
| Dec 23 | 36°F | 29°F | 59°F 1950 | 8°F 1990 | 68% | 17% |
| Dec 24 | 36°F | 29°F | 63°F 1963 | 7°F 1964 | 68% | 17% |
| Dec 25 | 36°F | 29°F | 60°F 1980 | 7°F 1964 | 68% | 17% |
| Dec 26 | 36°F | 29°F | 63°F 1980 | 9°F 2021 | 68% | 17% |
| Dec 27 | 36°F | 29°F | 58°F 2022 | 7°F 1968 | 68% | 17% |
| Dec 28 | 36°F | 29°F | 59°F 1986 | 1°F 1968 | 68% | 17% |
| Dec 29 | 36°F | 29°F | 60°F 2023 | 0°F 1968 | 69% | 17% |
| Dec 30 | 36°F | 29°F | 60°F 1963 | 4°F 1968 | 69% | 16% |
| Dec 31 | 36°F | 29°F | 60°F 1963 | 6°F 2021 | 69% | 16% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 7:40 AM, sunset 4:13 PM
- December 31
- sunrise 8:01 AM, sunset 4:21 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00458715 (Upper Baker Dam), public domain. Records: NOAA GHCN-Daily, station USW00024217, 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.