WeatherWX.com
Harriston Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 40°F Lo 24°F | Hi 45°F Lo 27°F | Hi 53°F Lo 33°F | Hi 64°F Lo 42°F | Hi 73°F Lo 52°F | Hi 82°F Lo 59°F | Hi 86°F Lo 64°F | Hi 84°F Lo 62°F | Hi 77°F Lo 56°F | Hi 66°F Lo 46°F | Hi 53°F Lo 34°F | Hi 45°F Lo 29°F |
| 6 mph | 6 mph | 6 mph | 6 mph | 5 mph | 5 mph | 4 mph | 4 mph | 4 mph | 5 mph | 6 mph | 5 mph |
| 2.9 in | 3 in | 3.2 in | 4 in | 4.7 in | 3.7 in | 3.5 in | 3.3 in | 4.5 in | 3.9 in | 3.2 in | 3.9 in |
| 75% | 76% | 75% | 74% | 77% | 73% | 72% | 74% | 76% | 77% | 73% | 77% |
| 42% | 45% | 44% | 40% | 44% | 33% | 34% | 36% | 38% | 36% | 33% | 43% |
| 30.1 in | 30.1 in | 30.1 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.1 in | 30.0 in | 30.2 in | 30.1 in |
| 21 | 17 | 21 | 22 | 21 | 19 | 21 | 21 | 23 | 25 | 25 | 22 |
| 7 | 7 | 7 | 7 | 10 | 11 | 10 | 10 | 7 | 6 | 5 | 7 |
| 3 | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| 2 | 2 | 3 | 3 | 5 | 6 | 5 | 5 | 4 | 3 | 2 | 2 |
| 179 | 153 | 174 | 190 | 190 | 231 | 229 | 220 | 209 | 223 | 228 | 190 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 5°C Lo -5°C | Hi 7°C Lo -3°C | Hi 12°C Lo 1°C | Hi 18°C Lo 6°C | Hi 23°C Lo 11°C | Hi 28°C Lo 15°C | Hi 30°C Lo 18°C | Hi 29°C Lo 17°C | Hi 25°C Lo 13°C | Hi 19°C Lo 8°C | Hi 12°C Lo 1°C | Hi 7°C Lo -2°C |
| 10 km/h | 10 km/h | 10 km/h | 10 km/h | 9 km/h | 8 km/h | 7 km/h | 7 km/h | 7 km/h | 8 km/h | 9 km/h | 9 km/h |
| 75 mm | 77 mm | 81 mm | 100 mm | 118 mm | 94 mm | 88 mm | 85 mm | 115 mm | 99 mm | 81 mm | 99 mm |
| 75% | 76% | 75% | 74% | 77% | 73% | 72% | 74% | 76% | 77% | 73% | 77% |
| 42% | 45% | 44% | 40% | 44% | 33% | 34% | 36% | 38% | 36% | 33% | 43% |
| 1020 mb | 1019 mb | 1019 mb | 1016 mb | 1017 mb | 1015 mb | 1015 mb | 1016 mb | 1018 mb | 1018 mb | 1021 mb | 1020 mb |
| 21 | 17 | 21 | 22 | 21 | 19 | 21 | 21 | 23 | 25 | 25 | 22 |
| 7 | 7 | 7 | 7 | 10 | 11 | 10 | 10 | 7 | 6 | 5 | 7 |
| 3 | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| 2 | 2 | 3 | 3 | 5 | 6 | 5 | 5 | 4 | 3 | 2 | 2 |
| 179 | 153 | 174 | 190 | 190 | 231 | 229 | 220 | 209 | 223 | 228 | 190 |
| 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.