Climate at a glance · Sarnia
Annual mean8°day and night
Precipitation879 mma year
Warmest monthJulyavg high 26°
Coldest monthJanuaryavg low -8°
Average temperature by month
High · lowJanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation by month
879 mm a yearJanFebMarAprMayJunJulAugSepOctNovDec
Monthly averages
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | -1° | 0° | 5° | 12° | 18° | 24° | 26° | 25° | 22° | 15° | 8° | 2° |
| Avg low | -8° | -8° | -4° | 2° | 7° | 13° | 16° | 15° | 11° | 5° | 1° | -5° |
| Precip, mm | 52 | 51 | 57 | 72 | 80 | 83 | 78 | 79 | 105 | 76 | 82 | 64 |
Climate normals 1981–2010 · Sarnia Airport station (8 km away) · Environment and Climate Change Canada
42.9787°N, 82.4041°W · Elevation 185 m