Climate averages 1991–2020
Chilliwack 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 Chilliwack: daytime highs average 3.9°C and nights cool to about -0.7°C. By daytime temperature it is the coolest month of the year.
Expect about 327 mm of rain on roughly 20 days, which makes December a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 8 h 18 min on an average December day.
The nearest other city in this atlas is Abbotsford (25 km away). In December its highs average 3.6°C, about as warm as Chilliwack, with 246 mm of rain.
Among the 86 cities listed in Canada, Chilliwack ranks 12th of 86 for the warmest December highs and 84th of 86 for the driest December (rainfall, lowest first). The mean December high of those 86 cities is 0.2°C; Chilliwack is 3.7°C warmer than that mean.
From December to January, average highs rise by 0.3°C to 4.2°C, and monthly rainfall rises from 327 mm to 342 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
Chilliwack climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.2°C-1.0°C | -1.0°C | 342 | 19.7 | 8.79 h |
| February | 6.3°C-0.4°C | -0.4°C | 213 | 16.5 | 10.110 h |
| March | 8.7°C1.4°C | 1.4°C | 263 | 20.0 | 11.912 h |
| April | 12.5°C4.1°C | 4.1°C | 172 | 17.3 | 13.714 h |
| May | 17.5°C8.0°C | 8.0°C | 122 | 14.8 | 15.315 h |
| June | 19.8°C11.2°C | 11.2°C | 102 | 14.4 | 16.116 h |
| July | 23.4°C14.1°C | 14.1°C | 61 | 8.8 | 15.816 h |
| August | 23.8°C14.3°C | 14.3°C | 74 | 8.6 | 14.414 h |
| September | 20.5°C11.4°C | 11.4°C | 124 | 11.1 | 12.713 h |
| October | 13.9°C6.7°C | 6.7°C | 256 | 17.4 | 10.811 h |
| November | 7.6°C2.1°C | 2.1°C | 372 | 20.5 | 9.29 h |
| December, selected | 3.9°C-0.7°C | -0.7°C | 327 | 20.1 | 8.38 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 · 25 kmHigh 3.6°C · Low -1.9°C · 246 mm rain
- Maple Ridge in DecemberCanada · 48 kmHigh 4.3°C · Low -0.6°C · 378 mm rain
- Langley in DecemberCanada · 52 kmHigh 5.1°C · Low 0.0°C · 212 mm rain
- Bellingham in DecemberUnited States · 60 kmHigh 5.8°C · Low 1.3°C · 206 mm rain
- Coquitlam in DecemberCanada · 62 kmHigh 4.8°C · Low 0.4°C · 330 mm rain
- Surrey in DecemberCanada · 64 kmHigh 4.8°C · Low 0.0°C · 212 mm rain
- New Westminster in DecemberCanada · 70 kmHigh 4.6°C · Low -0.4°C · 307 mm rain
- Burnaby in DecemberCanada · 73 kmHigh 5.0°C · Low 0.9°C · 307 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 Chilliwack) is explained once on the Chilliwack year overview and on the Sources, method and limits page.