Photo: University of the Fraser Valley · CC BY 2.0Chilliwack is among the wettest of Canadian towns: 1,734 mm of rain and snow a year
In July the day’s top temperature is typically 24.9°C. Only about 35 nights a year bring a frost, fewer than in 98% of Canadian towns. Expect the most rain and snow in November and the least in July. Plan for rain or snow on about 161 days a year, the days with 1 mm or more.
Chilliwack has no ECCC normals station of its own: every figure here comes from Agassiz, 18 km north-east.
A year in Chilliwack at a glance
Each month’s typical high and low, in °C.
What stands out about Chilliwack’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in British Columbia beside it.
What a year in Chilliwack feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
Frost on 35 days, 20°C on 106
Frosts fall from November to March; January has the most, about 10. Some 11 days a year climb past 30°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
Rain and melted snow: about 1,734 mm a year
7th wettest of 255 towns of 2,500+ in British Columbia.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
52 cm of snow in a typical year
The snow season runs November to March; January brings the most, about 18 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Chilliwack
88% of a year’s heating need falls between October and April. Months averaging under 10°C: November to March.
Measured against 18°C: each day’s shortfall in mean temperature, added over twelve months. By this count, homes here need less heating than 98% of Canadian towns.
Living with Chilliwack’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Highs of 17–27°C with nights of 8°C or more come in May, Jun, Jul, Aug and Sep.
Parks & trails →Humid summer days, the humidex above 30, number about 34 a year.
A typical year is calm by definition; Chilliwack’s hazards page covers the exceptions.
Flood & hazards →ECCC’s normals location: Agassiz
Behind the 1991–2020 normals for Agassiz are 2 stations, which ECCC combines into one record.
| Distance from the town | 18 km north-east |
| Station altitude | 19 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −13.9°C |
| Hottest reading, 1991–2020 | 37.3°C |
| Average wind | 6.6 km/h on average, most often from the north-east |
| Next-nearest location | Abbotsford, 32 km |
How Chilliwack compares
Compared with 2,611 towns and neighbourhoods of 2,500 or more across Canada; the dots mark the other normals locations in British Columbia.
Nearby towns’ climate
Nearby places read from a different ECCC location (places on Chilliwack’s own would show the same figures). The one place listed is 13 km from Chilliwack, the nearest with figures.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Chilliwack Agassiz | 24.9°C | 0.8°C | 1,734 mm |
| Cultus Lake 13 km · Abbotsford | 24.4°C 0.5°C cooler | 0.6°C about the same | 1,505 mm |
Chilliwack weather by month
Average daily high and low, mean temperature, rain and snow (as water) and snowfall by month, 1991–2020.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | 6.1°C | 0.8°C | 3.5°C | 250 mm | 18 cm |
| February | 8.6°C | 2.0°C | 5.3°C | 137 mm | 5 cm |
| March | 11.3°C | 3.3°C | 7.3°C | 152 mm | 7 cm |
| April | 15.0°C | 5.8°C | 10.4°C | 123 mm | 0 cm |
| May | 19.3°C | 9.2°C | 14.2°C | 90 mm | 0 cm |
| June | 21.2°C | 11.5°C | 16.4°C | 91 mm | 0 cm |
| July | 24.9°C | 13.1°C | 19.0°C | 55 mm | 0 cm |
| August | 25.0°C | 13.0°C | 19.0°C | 69 mm | 0 cm |
| September | 21.6°C | 10.8°C | 16.2°C | 98 mm | 0 cm |
| October | 15.1°C | 7.4°C | 11.2°C | 185 mm | 0 cm |
| November | 9.0°C | 3.6°C | 6.4°C | 268 mm | 7 cm |
| December | 5.8°C | 1.1°C | 3.5°C | 217 mm | 14 cm |
| Year | 15.2°C | 6.8°C | 11.0°C | 1,734 mm | 52 cm |
A March here can run from −9.3°C to 25.8°C
January is the least predictable month: about two years in three its average lands within 2.0°C of the normal, 3.5°C. August is the steadiest, within 0.9°C.
Where Chilliwack’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 normals from ECCC for Agassiz, its nearest location with complete temperatures.
- Comparisons: Canadian towns and neighbourhoods of at least 2,500, each placed by its nearest location (city totals and reserves excluded).
- Not on this page: sunshine (no 1991–2020 normals exist for it) and any altitude adjustment, since there is no elevation for the town itself.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Chilliwack’s climate
How warm does Chilliwack get in summer?
The warmest month is August, when afternoons average 25.0°C.
How cold does Chilliwack get in winter?
In January, the coldest month, the typical low is 0.8°C.
How much rain and snow does Chilliwack get?
1,734 mm a year counting snow as water. The wettest month is November (268 mm); the driest, July (55 mm).
How long does snow stay on the ground?
Snow covers the ground, 1 cm or more, on about 11 days a year.
Are these figures for Chilliwack itself?
They are borrowed from Agassiz, the nearest place to Chilliwack where ECCC publishes 1991–2020 normals.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Chilliwack →
Adapted from Statistics Canada (Census of Population 2021, population estimates 2025, 2021 census boundaries) under the Statistics Canada Open Licence; this does not constitute an endorsement by Statistics Canada. Neighbourhood names in some cities © OpenStreetMap contributors (ODbL).