WeatherWX.com
Jefferson Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 28°F Lo 13°F | Hi 31°F Lo 15°F | Hi 47°F Lo 31°F | Hi 59°F Lo 41°F | Hi 70°F Lo 52°F | Hi 80°F Lo 63°F | Hi 83°F Lo 65°F | Hi 82°F Lo 63°F | Hi 76°F Lo 57°F | Hi 61°F Lo 44°F | Hi 47°F Lo 32°F | Hi 34°F Lo 21°F |
| 10 mph | 10 mph | 11 mph | 11 mph | 9 mph | 9 mph | 7 mph | 7 mph | 9 mph | 10 mph | 11 mph | 10 mph |
| 0.4 in | 0.5 in | 1.1 in | 1.7 in | 2.6 in | 2.7 in | 1.4 in | 1.9 in | 1.6 in | 1.3 in | 0.7 in | 0.7 in |
| 83% | 82% | 74% | 69% | 74% | 78% | 81% | 78% | 71% | 65% | 69% | 78% |
| 55% | 51% | 50% | 47% | 46% | 36% | 31% | 33% | 29% | 35% | 37% | 48% |
| 30.2 in | 30.2 in | 30.1 in | 29.9 in | 29.9 in | 29.9 in | 30.0 in | 29.9 in | 30.0 in | 30.0 in | 30.1 in | 30.1 in |
| 22 | 20 | 23 | 22 | 22 | 22 | 26 | 24 | 24 | 26 | 25 | 23 |
| 5 | 5 | 6 | 8 | 9 | 8 | 6 | 7 | 6 | 5 | 4 | 5 |
| 3 | 3 | 2 | 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 | 5 | 6 | 5 | 5 | 4 | 3 | 2 | 1 |
| 46 | 50 | 51 | 54 | 59 | 68 | 80 | 77 | 81 | 75 | 69 | 59 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi -2°C Lo -10°C | Hi -1°C Lo -10°C | Hi 9°C Lo -1°C | Hi 15°C Lo 5°C | Hi 21°C Lo 11°C | Hi 27°C Lo 17°C | Hi 28°C Lo 18°C | Hi 28°C Lo 17°C | Hi 25°C Lo 14°C | Hi 16°C Lo 7°C | Hi 9°C Lo 0°C | Hi 1°C Lo -6°C |
| 17 km/h | 17 km/h | 17 km/h | 18 km/h | 15 km/h | 14 km/h | 12 km/h | 12 km/h | 14 km/h | 16 km/h | 17 km/h | 17 km/h |
| 11 mm | 13 mm | 27 mm | 44 mm | 67 mm | 69 mm | 35 mm | 48 mm | 40 mm | 33 mm | 17 mm | 18 mm |
| 83% | 82% | 74% | 69% | 74% | 78% | 81% | 78% | 71% | 65% | 69% | 78% |
| 55% | 51% | 50% | 47% | 46% | 36% | 31% | 33% | 29% | 35% | 37% | 48% |
| 1021 mb | 1021 mb | 1018 mb | 1013 mb | 1014 mb | 1012 mb | 1014 mb | 1014 mb | 1016 mb | 1016 mb | 1019 mb | 1019 mb |
| 22 | 20 | 23 | 22 | 22 | 22 | 26 | 24 | 24 | 26 | 25 | 23 |
| 5 | 5 | 6 | 8 | 9 | 8 | 6 | 7 | 6 | 5 | 4 | 5 |
| 3 | 3 | 2 | 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 | 5 | 6 | 5 | 5 | 4 | 3 | 2 | 1 |
| 46 | 50 | 51 | 54 | 59 | 68 | 80 | 77 | 81 | 75 | 69 | 59 |
| 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.