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Mission, British Columbia climate
Cfb Oceanic / temperate
Mission has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is August with an average daily high near 74°F, while the coldest is December averaging around 33°F at night. Precipitation totals about 73 inches a year and is strongly seasonal — November alone averages 10.7 inches while August barely receives 2.27 inches. Winters bring significant snowfall (29 inches of snow per year on average).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation split into rain and snow · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Mission climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 42 | 45 | 50 | 56 | 64 | 67 | 74 | 74 | 68 | 57 | 47 | 41 |
| Avg temp (°F) | 38 | 40 | 44 | 49 | 56 | 60 | 65 | 65 | 60 | 51 | 43 | 37 |
| Avg low (°F) | 33 | 35 | 37 | 42 | 48 | 52 | 57 | 57 | 53 | 46 | 38 | 33 |
| Precipitation (in) | 10.3 | 5.8 | 7.4 | 5.7 | 4.6 | 3.8 | 2.3 | 2.3 | 4.1 | 7.4 | 10.7 | 9.1 |
| Snowfall (in) | 8.8 | 5.0 | 3.1 | 0.7 | — | — | — | — | — | 0.2 | 2.5 | 9.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 42 | 45 | 50 | 56 | 64 | 67 |
| Avg temp (°F) | 38 | 40 | 44 | 49 | 56 | 60 |
| Avg low (°F) | 33 | 35 | 37 | 42 | 48 | 52 |
| Precipitation (in) | 10.3 | 5.8 | 7.4 | 5.7 | 4.6 | 3.8 |
| Snowfall (in) | 8.8 | 5.0 | 3.1 | 0.7 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 74 | 74 | 68 | 57 | 47 | 41 |
| Avg temp (°F) | 65 | 65 | 60 | 51 | 43 | 37 |
| Avg low (°F) | 57 | 57 | 53 | 46 | 38 | 33 |
| Precipitation (in) | 2.3 | 2.3 | 4.1 | 7.4 | 10.7 | 9.1 |
| Snowfall (in) | — | — | — | 0.2 | 2.5 | 9.1 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 73 | 77 | 75 | 70 | 70 | 52 | 51 | 55 | 71 | 77 | 77 |
| Relative humidity (%) | 91 | 87 | 85 | 81 | 78 | 79 | 77 | 77 | 79 | 84 | 90 | 91 |
| Wind speed (mph) | 2.0 | 1.9 | 1.7 | 1.5 | 1.2 | 1.1 | 1.0 | 1.0 | 1.2 | 1.5 | 1.9 | 2.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 73 | 77 | 75 | 70 | 70 |
| Relative humidity (%) | 91 | 87 | 85 | 81 | 78 | 79 |
| Wind speed (mph) | 2.0 | 1.9 | 1.7 | 1.5 | 1.2 | 1.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 52 | 51 | 55 | 71 | 77 | 77 |
| Relative humidity (%) | 77 | 77 | 79 | 84 | 90 | 91 |
| Wind speed (mph) | 1.0 | 1.0 | 1.2 | 1.5 | 1.9 | 2.1 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Mission West Abbey, a weather station, about 3 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.