Weather World
Jefferson County Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 28°F Lo 16°F | Hi 29°F Lo 17°F | Hi 39°F Lo 26°F | Hi 51°F Lo 36°F | Hi 63°F Lo 48°F | Hi 71°F Lo 57°F | Hi 77°F Lo 63°F | Hi 76°F Lo 62°F | Hi 70°F Lo 55°F | Hi 58°F Lo 46°F | Hi 45°F Lo 34°F | Hi 35°F Lo 25°F |
| 10 mph | 10 mph | 10 mph | 10 mph | 8 mph | 8 mph | 7 mph | 8 mph | 8 mph | 10 mph | 11 mph | 11 mph |
| 3.8 in | 3.7 in | 4.8 in | 5.1 in | 3.9 in | 4.7 in | 4.4 in | 4.6 in | 4 in | 6 in | 4.3 in | 5.6 in |
| 86% | 86% | 81% | 77% | 80% | 81% | 78% | 77% | 76% | 76% | 77% | 83% |
| 75% | 72% | 66% | 57% | 47% | 43% | 35% | 37% | 38% | 52% | 56% | 70% |
| 30.0 in | 30.0 in | 30.0 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 |
| 10 | 11 | 17 | 18 | 22 | 20 | 23 | 22 | 24 | 21 | 18 | 13 |
| 14 | 11 | 10 | 10 | 9 | 10 | 8 | 9 | 6 | 10 | 9 | 12 |
| 9 | 7 | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 6 |
| 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 1 |
| 1 | 1 | 2 | 3 | 4 | 5 | 5 | 5 | 4 | 2 | 1 | 1 |
| 62 | 62 | 94 | 124 | 181 | 185 | 225 | 212 | 203 | 133 | 123 | 72 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi -2°C Lo -9°C | Hi -1°C Lo -9°C | Hi 4°C Lo -4°C | Hi 11°C Lo 2°C | Hi 17°C Lo 9°C | Hi 22°C Lo 14°C | Hi 25°C Lo 17°C | Hi 25°C Lo 17°C | Hi 21°C Lo 13°C | Hi 14°C Lo 8°C | Hi 7°C Lo 1°C | Hi 1°C Lo -4°C |
| 16 km/h | 16 km/h | 16 km/h | 16 km/h | 13 km/h | 13 km/h | 12 km/h | 12 km/h | 13 km/h | 15 km/h | 17 km/h | 17 km/h |
| 96 mm | 95 mm | 121 mm | 128 mm | 100 mm | 120 mm | 112 mm | 118 mm | 100 mm | 153 mm | 110 mm | 143 mm |
| 86% | 86% | 81% | 77% | 80% | 81% | 78% | 77% | 76% | 76% | 77% | 83% |
| 75% | 72% | 66% | 57% | 47% | 43% | 35% | 37% | 38% | 52% | 56% | 70% |
| 1017 mb | 1017 mb | 1017 mb | 1015 mb | 1015 mb | 1013 mb | 1014 mb | 1015 mb | 1017 mb | 1016 mb | 1018 mb | 1017 mb |
| 10 | 11 | 17 | 18 | 22 | 20 | 23 | 22 | 24 | 21 | 18 | 13 |
| 14 | 11 | 10 | 10 | 9 | 10 | 8 | 9 | 6 | 10 | 9 | 12 |
| 9 | 7 | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 6 |
| 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 1 |
| 1 | 1 | 2 | 3 | 4 | 5 | 5 | 5 | 4 | 2 | 1 | 1 |
| 62 | 62 | 94 | 124 | 181 | 185 | 225 | 212 | 203 | 133 | 123 | 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.