Climate at a glance · St. Thomas
Annual mean9°day and night
Precipitation992 mma year
Warmest monthJulyavg high 27°
Coldest monthJanuaryavg low -9°
Average temperature by month
High · lowJanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation by month
992 mm a yearJanFebMarAprMayJunJulAugSepOctNovDec
Monthly averages
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | -1° | 1° | 6° | 13° | 20° | 25° | 27° | 26° | 22° | 15° | 8° | 2° |
| Avg low | -9° | -8° | -4° | 2° | 8° | 13° | 15° | 15° | 11° | 5° | 1° | -5° |
| Precip, mm | 73 | 63 | 66 | 83 | 87 | 92 | 83 | 80 | 95 | 86 | 99 | 85 |
Climate normals 1981–2010 · St Thomas Wpcp station (2 km away) · Environment and Climate Change Canada
42.7736°N, 81.1804°W · Elevation 232 m