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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 82°F, while the coldest is January averaging around 16°F at night. Precipitation is fairly even year-round, totalling about 37 inches.
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 (°F) | 30 | 32 | 41 | 55 | 68 | 77 | 82 | 79 | 73 | 59 | 47 | 35 |
| Avg temp (°F) | 23 | 24 | 33 | 45 | 57 | 66 | 70 | 68 | 62 | 50 | 39 | 29 |
| Avg low (°F) | 16 | 16 | 24 | 34 | 45 | 55 | 59 | 57 | 51 | 41 | 32 | 23 |
| Precipitation (in) | 3.0 | 2.7 | 2.9 | 3.3 | 3.2 | 3.1 | 3.1 | 3.1 | 3.4 | 3.4 | 2.9 | 3.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 30 | 32 | 41 | 55 | 68 | 77 |
| Avg temp (°F) | 23 | 24 | 33 | 45 | 57 | 66 |
| Avg low (°F) | 16 | 16 | 24 | 34 | 45 | 55 |
| Precipitation (in) | 3.0 | 2.7 | 2.9 | 3.3 | 3.2 | 3.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 82 | 79 | 73 | 59 | 47 | 35 |
| Avg temp (°F) | 70 | 68 | 62 | 50 | 39 | 29 |
| Avg low (°F) | 59 | 57 | 51 | 41 | 32 | 23 |
| Precipitation (in) | 3.1 | 3.1 | 3.4 | 3.4 | 2.9 | 3.1 |
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 (mph) | 11.1 | 10.8 | 10.0 | 9.5 | 7.9 | 7.2 | 6.9 | 6.6 | 7.3 | 8.6 | 9.4 | 10.0 |
| 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 (mph) | 11.1 | 10.8 | 10.0 | 9.5 | 7.9 | 7.2 |
| 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 (mph) | 6.9 | 6.6 | 7.3 | 8.6 | 9.4 | 10.0 |
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.