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Tecumseh, Ontario climate
Cfa Humid subtropical
Tecumseh has a strongly seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 29°C, while the coldest is January averaging around −6°C at night. Precipitation is fairly even year-round, totalling about 939 mm. Winters bring significant snowfall (106 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)Tecumseh climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 0 | 2 | 8 | 15 | 21 | 27 | 29 | 28 | 24 | 17 | 10 | 3 |
| Avg temp (°C) | −3 | −2 | 3 | 9 | 16 | 21 | 24 | 23 | 19 | 12 | 6 | 0 |
| Avg low (°C) | −6 | −6 | −2 | 4 | 10 | 16 | 18 | 18 | 14 | 8 | 2 | −3 |
| Precipitation (mm) | 70 | 62 | 68 | 86 | 94 | 81 | 86 | 94 | 94 | 69 | 71 | 64 |
| Snowfall (cm) | 33 | 26 | 16 | 4 | 0 | — | — | — | — | — | 5 | 21 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 0 | 2 | 8 | 15 | 21 | 27 |
| Avg temp (°C) | −3 | −2 | 3 | 9 | 16 | 21 |
| Avg low (°C) | −6 | −6 | −2 | 4 | 10 | 16 |
| Precipitation (mm) | 70 | 62 | 68 | 86 | 94 | 81 |
| Snowfall (cm) | 33 | 26 | 16 | 4 | 0 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 28 | 24 | 17 | 10 | 3 |
| Avg temp (°C) | 24 | 23 | 19 | 12 | 6 | 0 |
| Avg low (°C) | 18 | 18 | 14 | 8 | 2 | −3 |
| Precipitation (mm) | 86 | 94 | 94 | 69 | 71 | 64 |
| Snowfall (cm) | — | — | — | — | 5 | 21 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 73 | 72 | 72 | 68 | 67 | 61 | 53 | 55 | 54 | 64 | 71 | 75 |
| Relative humidity (%) | 88 | 85 | 79 | 75 | 75 | 76 | 74 | 74 | 74 | 77 | 82 | 86 |
| Wind speed (m/s) | 4.3 | 4.2 | 4.0 | 3.8 | 3.2 | 2.7 | 2.5 | 2.5 | 2.8 | 3.4 | 3.8 | 3.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 73 | 72 | 72 | 68 | 67 | 61 |
| Relative humidity (%) | 88 | 85 | 79 | 75 | 75 | 76 |
| Wind speed (m/s) | 4.3 | 4.2 | 4.0 | 3.8 | 3.2 | 2.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 53 | 55 | 54 | 64 | 71 | 75 |
| Relative humidity (%) | 74 | 74 | 74 | 77 | 82 | 86 |
| Wind speed (m/s) | 2.5 | 2.5 | 2.8 | 3.4 | 3.8 | 3.9 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 27 years of daily observations at Windsor Riverside, a weather station, about 4 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.