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Chilliwack, British Columbia climate

Cfb Oceanic / temperate

Chilliwack has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 77°F, while the coldest is January averaging around 33°F at night. Precipitation totals about 67 inches a year and is strongly seasonal — November alone averages 10.1 inches while July barely receives 1.94 inches.

☀️ Summers

Mild

Highs near 77°F in July.

❄️ Winters

Chilly

Lows near 33°F in January.

🌧️ Rain

Very wet

About 67 in of rain a year.

Wettest in November

⛅ Sky & trend

Often cloudy

Cloudy skies much of the year.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Chilliwack climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	43	48	52	59	67	70	77	77	71	59	48	43
Avg temp (°F)	38	42	45	51	58	61	66	66	61	52	43	38
Avg low (°F)	33	36	38	42	49	53	56	55	51	45	39	34
Precipitation (in)	9.7	5.3	6.7	4.8	3.8	3.3	1.9	2.3	3.8	7.3	10.1	8.0

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	43	48	52	59	67	70
Avg temp (°F)	38	42	45	51	58	61
Avg low (°F)	33	36	38	42	49	53
Precipitation (in)	9.7	5.3	6.7	4.8	3.8	3.3

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	77	77	71	59	48	43
Avg temp (°F)	66	66	61	52	43	38
Avg low (°F)	56	55	51	45	39	34
Precipitation (in)	1.9	2.3	3.8	7.3	10.1	8.0

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	71	69	73	73	70	70	51	51	56	70	74	73
Relative humidity (%)	95	92	90	84	80	80	78	78	79	85	93	95
Wind speed (mph)	0.6	0.6	0.6	0.6	0.5	0.4	0.5	0.6	0.7	0.6	0.5	0.5

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	71	69	73	73	70	70
Relative humidity (%)	95	92	90	84	80	80
Wind speed (mph)	0.6	0.6	0.6	0.6	0.5	0.4

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	51	51	56	70	74	73
Relative humidity (%)	78	78	79	85	93	95
Wind speed (mph)	0.5	0.6	0.7	0.6	0.5	0.5

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Agassiz Rcs, a weather station, about 16 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →