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Guelph, Ontario climate
Dfb Warm-summer humid continental
Guelph has a strongly seasonal cold-temperate climate (Warm-summer humid continental, Köppen Dfb). The hottest month is July with an average daily high near 79°F, while the coldest is January averaging around 12°F at night. Precipitation is fairly even year-round, totalling about 37 inches. Snowfall is heavy (60 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)Guelph climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 26 | 29 | 38 | 51 | 65 | 74 | 79 | 77 | 70 | 56 | 43 | 32 |
| Avg temp (°F) | 19 | 20 | 29 | 41 | 54 | 64 | 68 | 67 | 59 | 47 | 36 | 26 |
| Avg low (°F) | 12 | 12 | 20 | 32 | 43 | 53 | 58 | 56 | 49 | 38 | 29 | 20 |
| Precipitation (in) | 3.1 | 2.1 | 2.3 | 3.4 | 3.3 | 3.7 | 3.2 | 3.1 | 3.2 | 3.4 | 3.0 | 2.8 |
| Snowfall (in) | 17.4 | 13.5 | 8.2 | 2.4 | 0.1 | — | — | — | — | 0.3 | 4.9 | 13.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 26 | 29 | 38 | 51 | 65 | 74 |
| Avg temp (°F) | 19 | 20 | 29 | 41 | 54 | 64 |
| Avg low (°F) | 12 | 12 | 20 | 32 | 43 | 53 |
| Precipitation (in) | 3.1 | 2.1 | 2.3 | 3.4 | 3.3 | 3.7 |
| Snowfall (in) | 17.4 | 13.5 | 8.2 | 2.4 | 0.1 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 79 | 77 | 70 | 56 | 43 | 32 |
| Avg temp (°F) | 68 | 67 | 59 | 47 | 36 | 26 |
| Avg low (°F) | 58 | 56 | 49 | 38 | 29 | 20 |
| Precipitation (in) | 3.2 | 3.1 | 3.2 | 3.4 | 3.0 | 2.8 |
| Snowfall (in) | — | — | — | 0.3 | 4.9 | 13.5 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 73 | 69 | 68 | 67 | 64 | 59 | 54 | 54 | 56 | 68 | 74 | 76 |
| Relative humidity (%) | 90 | 89 | 83 | 77 | 75 | 73 | 69 | 70 | 72 | 79 | 85 | 89 |
| Wind speed (mph) | 10.2 | 10.3 | 9.5 | 8.7 | 7.1 | 6.2 | 5.9 | 5.6 | 6.2 | 7.4 | 8.1 | 8.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 73 | 69 | 68 | 67 | 64 | 59 |
| Relative humidity (%) | 90 | 89 | 83 | 77 | 75 | 73 |
| Wind speed (mph) | 10.2 | 10.3 | 9.5 | 8.7 | 7.1 | 6.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 54 | 54 | 56 | 68 | 74 | 76 |
| Relative humidity (%) | 69 | 70 | 72 | 79 | 85 | 89 |
| Wind speed (mph) | 5.9 | 5.6 | 6.2 | 7.4 | 8.1 | 8.9 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 28 years of daily observations at Fergus Moe, a weather station, about 20 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.