WeatherWX.com
St. Catharines Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 31°F Lo 22°F | Hi 32°F Lo 21°F | Hi 40°F Lo 29°F | Hi 50°F Lo 38°F | Hi 62°F Lo 49°F | Hi 71°F Lo 59°F | Hi 78°F Lo 66°F | Hi 77°F Lo 66°F | Hi 71°F Lo 60°F | Hi 59°F Lo 49°F | Hi 47°F Lo 38°F | Hi 37°F Lo 30°F |
| 13 mph | 12 mph | 11 mph | 11 mph | 8 mph | 8 mph | 8 mph | 8 mph | 9 mph | 11 mph | 12 mph | 13 mph |
| 2.9 in | 3 in | 3.5 in | 4.8 in | 3.8 in | 4.3 in | 3.9 in | 3.5 in | 3.3 in | 4.4 in | 2.9 in | 3.3 in |
| 82% | 83% | 78% | 76% | 78% | 78% | 75% | 74% | 73% | 74% | 74% | 79% |
| 71% | 68% | 57% | 50% | 39% | 35% | 30% | 30% | 32% | 48% | 49% | 66% |
| 30.0 in | 30.1 in | 30.1 in | 30.0 in | 30.0 in | 29.9 in | 29.9 in | 30.0 in | 30.0 in | 30.0 in | 30.1 in | 30.0 in |
| 16 | 12 | 20 | 20 | 23 | 22 | 23 | 24 | 23 | 22 | 23 | 18 |
| 11 | 11 | 8 | 9 | 8 | 8 | 8 | 7 | 7 | 9 | 7 | 10 |
| 4 | 5 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 1 | 2 | 3 | 4 | 5 | 5 | 5 | 3 | 2 | 2 | 1 |
| 65 | 65 | 118 | 143 | 202 | 210 | 246 | 244 | 222 | 146 | 142 | 72 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi -1°C Lo -6°C | Hi -0°C Lo -6°C | Hi 4°C Lo -2°C | Hi 10°C Lo 3°C | Hi 17°C Lo 9°C | Hi 22°C Lo 15°C | Hi 25°C Lo 19°C | Hi 25°C Lo 19°C | Hi 22°C Lo 15°C | Hi 15°C Lo 10°C | Hi 8°C Lo 3°C | Hi 3°C Lo -1°C |
| 20 km/h | 20 km/h | 18 km/h | 17 km/h | 14 km/h | 13 km/h | 12 km/h | 13 km/h | 15 km/h | 18 km/h | 20 km/h | 20 km/h |
| 73 mm | 77 mm | 90 mm | 123 mm | 97 mm | 108 mm | 99 mm | 88 mm | 85 mm | 112 mm | 74 mm | 84 mm |
| 82% | 83% | 78% | 76% | 78% | 78% | 75% | 74% | 73% | 74% | 74% | 79% |
| 71% | 68% | 57% | 50% | 39% | 35% | 30% | 30% | 32% | 48% | 49% | 66% |
| 1017 mb | 1018 mb | 1018 mb | 1015 mb | 1016 mb | 1013 mb | 1014 mb | 1015 mb | 1017 mb | 1016 mb | 1019 mb | 1017 mb |
| 16 | 12 | 20 | 20 | 23 | 22 | 23 | 24 | 23 | 22 | 23 | 18 |
| 11 | 11 | 8 | 9 | 8 | 8 | 8 | 7 | 7 | 9 | 7 | 10 |
| 4 | 5 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 1 | 2 | 3 | 4 | 5 | 5 | 5 | 3 | 2 | 2 | 1 |
| 65 | 65 | 118 | 143 | 202 | 210 | 246 | 244 | 222 | 146 | 142 | 72 |
| 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.