Climate averages 1991–2020
Bellingham weather
in December.
A cold, very wet month: the coolest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Bellingham: daytime highs average 5.8°C and nights cool to about 1.3°C. By daytime temperature it is the coolest month of the year.
Expect about 206 mm of rain on roughly 18 days, which makes December a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 8 h 21 min on an average December day.
The nearest other city in this atlas is Abbotsford (37 km away). In December its highs average 3.6°C, 2.2°C cooler than Bellingham, with 246 mm of rain.
Among the 498 cities listed in the United States, Bellingham ranks joint 331st of 498 for the warmest December highs and joint 493rd of 498 for the driest December (rainfall, lowest first). The mean December high of those 498 cities is 10.5°C; Bellingham is 4.7°C cooler than that mean.
From December to January, average highs rise by 0.5°C to 6.4°C, and monthly rainfall rises from 206 mm to 213 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Bellingham climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 6.4°C1.2°C | 1.2°C | 213 | 18.6 | 8.89 h |
| February | 7.8°C1.2°C | 1.2°C | 139 | 15.5 | 10.110 h |
| March | 9.8°C2.6°C | 2.6°C | 171 | 18.9 | 11.912 h |
| April | 12.5°C4.7°C | 4.7°C | 122 | 15.2 | 13.714 h |
| May | 15.9°C8.1°C | 8.1°C | 86 | 11.3 | 15.215 h |
| June | 17.9°C11.1°C | 11.1°C | 64 | 9.4 | 16.116 h |
| July | 21.2°C13.8°C | 13.8°C | 32 | 5.1 | 15.716 h |
| August | 21.7°C14.2°C | 14.2°C | 46 | 5.3 | 14.414 h |
| September | 19.0°C11.8°C | 11.8°C | 81 | 9.1 | 12.613 h |
| October | 13.6°C7.7°C | 7.7°C | 162 | 14.7 | 10.911 h |
| November | 8.7°C3.8°C | 3.8°C | 240 | 18.8 | 9.29 h |
| December, selected | 5.8°C1.3°C | 1.3°C | 206 | 18.3 | 8.48 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Abbotsford in DecemberCanada · 37 kmHigh 3.6°C · Low -1.9°C · 246 mm rain
- Langley in DecemberCanada · 40 kmHigh 5.1°C · Low 0.0°C · 212 mm rain
- Surrey in DecemberCanada · 46 kmHigh 4.8°C · Low 0.0°C · 212 mm rain
- Maple Ridge in DecemberCanada · 52 kmHigh 4.3°C · Low -0.6°C · 378 mm rain
- Delta in DecemberCanada · 55 kmHigh 5.7°C · Low 1.4°C · 198 mm rain
- New Westminster in DecemberCanada · 59 kmHigh 4.6°C · Low -0.4°C · 307 mm rain
- Chilliwack in DecemberCanada · 60 kmHigh 3.9°C · Low -0.7°C · 327 mm rain
- Coquitlam in DecemberCanada · 62 kmHigh 4.8°C · Low 0.4°C · 330 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Bellingham) is explained once on the Bellingham year overview and on the Sources, method and limits page.