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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 26°C, while the coldest is January averaging around −11°C at night. Precipitation is fairly even year-round, totalling about 930 mm. Snowfall is heavy (153 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)Guelph climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | −3 | −2 | 3 | 11 | 18 | 23 | 26 | 25 | 21 | 13 | 6 | 0 |
| Avg temp (°C) | −7 | −6 | −2 | 5 | 12 | 18 | 20 | 19 | 15 | 8 | 2 | −3 |
| Avg low (°C) | −11 | −11 | −6 | 0 | 6 | 12 | 14 | 13 | 9 | 3 | −2 | −7 |
| Precipitation (mm) | 78 | 54 | 59 | 87 | 85 | 93 | 80 | 79 | 82 | 87 | 76 | 71 |
| Snowfall (cm) | 44 | 34 | 21 | 6 | 0 | — | — | — | — | 1 | 12 | 34 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | −3 | −2 | 3 | 11 | 18 | 23 |
| Avg temp (°C) | −7 | −6 | −2 | 5 | 12 | 18 |
| Avg low (°C) | −11 | −11 | −6 | 0 | 6 | 12 |
| Precipitation (mm) | 78 | 54 | 59 | 87 | 85 | 93 |
| Snowfall (cm) | 44 | 34 | 21 | 6 | 0 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 26 | 25 | 21 | 13 | 6 | 0 |
| Avg temp (°C) | 20 | 19 | 15 | 8 | 2 | −3 |
| Avg low (°C) | 14 | 13 | 9 | 3 | −2 | −7 |
| Precipitation (mm) | 80 | 79 | 82 | 87 | 76 | 71 |
| Snowfall (cm) | — | — | — | 1 | 12 | 34 |
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.