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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 23°C, while the coldest is December averaging around 1°C at night. Precipitation totals about 1864 mm a year and is strongly seasonal — November alone averages 271 mm while August barely receives 58 mm. Winters bring significant snowfall (74 cm 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 (°C) | 5 | 7 | 10 | 14 | 18 | 20 | 23 | 23 | 20 | 14 | 8 | 5 |
| Avg temp (°C) | 3 | 4 | 7 | 9 | 13 | 15 | 18 | 19 | 16 | 11 | 6 | 3 |
| Avg low (°C) | 1 | 2 | 3 | 5 | 9 | 11 | 14 | 14 | 12 | 8 | 3 | 1 |
| Precipitation (mm) | 260 | 148 | 187 | 144 | 117 | 98 | 59 | 58 | 104 | 187 | 271 | 231 |
| Snowfall (cm) | 22 | 13 | 8 | 2 | — | — | — | — | — | 1 | 6 | 23 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 7 | 10 | 14 | 18 | 20 |
| Avg temp (°C) | 3 | 4 | 7 | 9 | 13 | 15 |
| Avg low (°C) | 1 | 2 | 3 | 5 | 9 | 11 |
| Precipitation (mm) | 260 | 148 | 187 | 144 | 117 | 98 |
| Snowfall (cm) | 22 | 13 | 8 | 2 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 23 | 23 | 20 | 14 | 8 | 5 |
| Avg temp (°C) | 18 | 19 | 16 | 11 | 6 | 3 |
| Avg low (°C) | 14 | 14 | 12 | 8 | 3 | 1 |
| Precipitation (mm) | 59 | 58 | 104 | 187 | 271 | 231 |
| Snowfall (cm) | — | — | — | 1 | 6 | 23 |
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 (km/h) | 3.2 | 3.0 | 2.7 | 2.3 | 1.9 | 1.8 | 1.6 | 1.6 | 1.9 | 2.4 | 3.0 | 3.3 |
| 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 (km/h) | 3.2 | 3.0 | 2.7 | 2.3 | 1.9 | 1.8 |
| 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 (km/h) | 1.6 | 1.6 | 1.9 | 2.4 | 3.0 | 3.3 |
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.