Weather World
City of St. Thomas, ON
St. Thomas Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 28°F Lo 17°F | Hi 30°F Lo 17°F | Hi 40°F Lo 27°F | Hi 52°F Lo 36°F | Hi 66°F Lo 48°F | Hi 74°F Lo 56°F | Hi 79°F Lo 61°F | Hi 77°F Lo 60°F | Hi 72°F Lo 54°F | Hi 58°F Lo 44°F | Hi 45°F Lo 33°F | Hi 35°F Lo 26°F |
| 11 mph | 11 mph | 11 mph | 10 mph | 9 mph | 8 mph | 7 mph | 7 mph | 8 mph | 10 mph | 10 mph | 11 mph |
| 2.8 in | 2.8 in | 3.8 in | 4.5 in | 4.2 in | 4.8 in | 4.3 in | 4.3 in | 3.3 in | 3.9 in | 3.2 in | 3.8 in |
| 87% | 87% | 80% | 75% | 74% | 76% | 79% | 79% | 77% | 78% | 80% | 85% |
| 76% | 72% | 61% | 56% | 44% | 39% | 36% | 37% | 40% | 51% | 56% | 72% |
| 30.0 in | 30.1 in | 30.1 in | 30.0 in | 30.0 in | 29.9 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.1 in | 30.1 in |
| 14 | 13 | 18 | 18 | 23 | 21 | 22 | 23 | 23 | 22 | 20 | 16 |
| 12 | 10 | 9 | 10 | 8 | 9 | 9 | 8 | 7 | 8 | 8 | 10 |
| 7 | 6 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 5 |
| 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 |
| 1 | 1 | 2 | 3 | 4 | 5 | 5 | 5 | 4 | 2 | 1 | 1 |
| 50 | 61 | 107 | 129 | 181 | 197 | 216 | 211 | 191 | 141 | 122 | 61 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi -2°C Lo -8°C | Hi -1°C Lo -8°C | Hi 5°C Lo -3°C | Hi 11°C Lo 2°C | Hi 19°C Lo 9°C | Hi 23°C Lo 14°C | Hi 26°C Lo 16°C | Hi 25°C Lo 16°C | Hi 22°C Lo 12°C | Hi 15°C Lo 7°C | Hi 7°C Lo 1°C | Hi 1°C Lo -3°C |
| 17 km/h | 17 km/h | 17 km/h | 17 km/h | 14 km/h | 13 km/h | 11 km/h | 11 km/h | 13 km/h | 15 km/h | 17 km/h | 17 km/h |
| 71 mm | 71 mm | 96 mm | 114 mm | 105 mm | 121 mm | 110 mm | 109 mm | 82 mm | 99 mm | 81 mm | 98 mm |
| 87% | 87% | 80% | 75% | 74% | 76% | 79% | 79% | 77% | 78% | 80% | 85% |
| 76% | 72% | 61% | 56% | 44% | 39% | 36% | 37% | 40% | 51% | 56% | 72% |
| 101.8 kPa | 101.8 kPa | 101.8 kPa | 101.5 kPa | 101.6 kPa | 101.3 kPa | 101.4 kPa | 101.5 kPa | 101.7 kPa | 101.6 kPa | 101.8 kPa | 101.8 kPa |
| 14 | 13 | 18 | 18 | 23 | 21 | 22 | 23 | 23 | 22 | 20 | 16 |
| 12 | 10 | 9 | 10 | 8 | 9 | 9 | 8 | 7 | 8 | 8 | 10 |
| 7 | 6 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 5 |
| 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 |
| 1 | 1 | 2 | 3 | 4 | 5 | 5 | 5 | 4 | 2 | 1 | 1 |
| 50 | 61 | 107 | 129 | 181 | 197 | 216 | 211 | 191 | 141 | 122 | 61 |
| Month |
| Avg. Temperatures |
| Avg. Wind Speed |
| Avg. Precipitation |
| Average Humidity |
| Avg. Cloud Cover |
| Pressure Average |
| Average Dry Days |
| Avg. Precip. Days |
| Avg. Snow Days |
| Average Fog Days |
| Average UV Index |
| Avg. Hours of Sun |
Averages are based on historical weather data from the past 10 years.