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New Westminster, British Columbia climate
Csb Warm-summer Mediterranean
New Westminster has a seasonal cool-temperate climate (Warm-summer Mediterranean, Köppen Csb). The hottest month is July with an average daily high near 76°F, while the coldest is December averaging around 33°F at night. Precipitation totals about 49 inches a year and is strongly seasonal — November alone averages 7.2 inches while July barely receives 1.30 inches. Light snow accumulates each winter (11 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)New Westminster climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 45 | 48 | 53 | 59 | 67 | 71 | 76 | 76 | 69 | 58 | 49 | 44 |
| Avg temp (°F) | 39 | 41 | 45 | 50 | 57 | 61 | 66 | 65 | 60 | 51 | 43 | 39 |
| Avg low (°F) | 34 | 34 | 37 | 40 | 47 | 52 | 55 | 55 | 50 | 44 | 37 | 33 |
| Precipitation (in) | 7.1 | 4.0 | 4.8 | 3.7 | 2.5 | 2.2 | 1.3 | 1.5 | 2.7 | 5.0 | 7.2 | 7.0 |
| Snowfall (in) | 3.5 | 2.2 | 0.8 | 0.4 | — | — | — | — | — | 0.1 | 1.2 | 2.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 45 | 48 | 53 | 59 | 67 | 71 |
| Avg temp (°F) | 39 | 41 | 45 | 50 | 57 | 61 |
| Avg low (°F) | 34 | 34 | 37 | 40 | 47 | 52 |
| Precipitation (in) | 7.1 | 4.0 | 4.8 | 3.7 | 2.5 | 2.2 |
| Snowfall (in) | 3.5 | 2.2 | 0.8 | 0.4 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 76 | 76 | 69 | 58 | 49 | 44 |
| Avg temp (°F) | 66 | 65 | 60 | 51 | 43 | 39 |
| Avg low (°F) | 55 | 55 | 50 | 44 | 37 | 33 |
| Precipitation (in) | 1.3 | 1.5 | 2.7 | 5.0 | 7.2 | 7.0 |
| Snowfall (in) | — | — | — | 0.1 | 1.2 | 2.7 |
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 (%) | 88 | 84 | 83 | 79 | 77 | 77 | 76 | 76 | 78 | 83 | 87 | 87 |
| Wind speed (mph) | 5.2 | 4.9 | 4.5 | 3.6 | 2.8 | 2.7 | 2.3 | 2.2 | 2.6 | 3.7 | 5.0 | 5.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 73 | 77 | 75 | 70 | 70 |
| Relative humidity (%) | 88 | 84 | 83 | 79 | 77 | 77 |
| Wind speed (mph) | 5.2 | 4.9 | 4.5 | 3.6 | 2.8 | 2.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 52 | 51 | 55 | 71 | 77 | 77 |
| Relative humidity (%) | 76 | 76 | 78 | 83 | 87 | 87 |
| Wind speed (mph) | 2.3 | 2.2 | 2.6 | 3.7 | 5.0 | 5.6 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 27 years of daily observations at Richmond Nature Park, a weather station, about 14 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.