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Norfolk County, Ontario climate
Dfb Warm-summer humid continental
Norfolk County has a strongly seasonal cool-temperate climate (Warm-summer humid continental, Köppen Dfb). The hottest month is July with an average daily high near 28°C, while the coldest is January averaging around −9°C at night. Precipitation is fairly even year-round, totalling about 943 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 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)Norfolk County climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | −1 | 0 | 5 | 13 | 20 | 25 | 28 | 26 | 23 | 15 | 8 | 2 |
| Avg temp (°C) | −5 | −4 | 0 | 7 | 14 | 19 | 21 | 20 | 17 | 10 | 4 | −2 |
| Avg low (°C) | −9 | −9 | −4 | 1 | 7 | 13 | 15 | 14 | 10 | 5 | 0 | −5 |
| Precipitation (mm) | 77 | 68 | 73 | 84 | 82 | 78 | 80 | 79 | 86 | 86 | 73 | 80 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | −1 | 0 | 5 | 13 | 20 | 25 |
| Avg temp (°C) | −5 | −4 | 0 | 7 | 14 | 19 |
| Avg low (°C) | −9 | −9 | −4 | 1 | 7 | 13 |
| Precipitation (mm) | 77 | 68 | 73 | 84 | 82 | 78 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 26 | 23 | 15 | 8 | 2 |
| Avg temp (°C) | 21 | 20 | 17 | 10 | 4 | −2 |
| Avg low (°C) | 15 | 14 | 10 | 5 | 0 | −5 |
| Precipitation (mm) | 80 | 79 | 86 | 86 | 73 | 80 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 80 | 77 | 76 | 74 | 72 | 66 | 59 | 58 | 59 | 68 | 75 | 81 |
| Relative humidity (%) | 88 | 86 | 81 | 76 | 73 | 69 | 66 | 67 | 70 | 77 | 82 | 87 |
| Wind speed (km/h) | 17.9 | 17.3 | 16.1 | 15.2 | 12.8 | 11.6 | 11.1 | 10.7 | 11.8 | 13.9 | 15.1 | 16.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 80 | 77 | 76 | 74 | 72 | 66 |
| Relative humidity (%) | 88 | 86 | 81 | 76 | 73 | 69 |
| Wind speed (km/h) | 17.9 | 17.3 | 16.1 | 15.2 | 12.8 | 11.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 59 | 58 | 59 | 68 | 75 | 81 |
| Relative humidity (%) | 66 | 67 | 70 | 77 | 82 | 87 |
| Wind speed (km/h) | 11.1 | 10.7 | 11.8 | 13.9 | 15.1 | 16.0 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 23 years of daily observations at Delhi CS, 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.