Weather World
Jefferson County, TN Official Website
Jefferson County Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 45°F Lo 29°F | Hi 52°F Lo 34°F | Hi 60°F Lo 40°F | Hi 69°F Lo 48°F | Hi 77°F Lo 56°F | Hi 85°F Lo 63°F | Hi 88°F Lo 67°F | Hi 87°F Lo 65°F | Hi 82°F Lo 60°F | Hi 70°F Lo 49°F | Hi 59°F Lo 39°F | Hi 51°F Lo 35°F |
| 5 mph | 5 mph | 6 mph | 6 mph | 5 mph | 4 mph | 4 mph | 4 mph | 4 mph | 4 mph | 5 mph | 5 mph |
| 4.6 in | 4.7 in | 4.7 in | 4.2 in | 4.5 in | 3.7 in | 4.7 in | 3.7 in | 4.1 in | 3.5 in | 3.7 in | 4.7 in |
| 76% | 77% | 75% | 73% | 75% | 73% | 73% | 72% | 73% | 74% | 72% | 77% |
| 49% | 52% | 45% | 37% | 38% | 31% | 35% | 32% | 33% | 33% | 36% | 46% |
| 30.2 in | 30.1 in | 30.1 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.1 in | 30.2 in | 30.1 in |
| 20 | 18 | 22 | 23 | 22 | 21 | 21 | 23 | 23 | 26 | 24 | 22 |
| 8 | 8 | 9 | 7 | 9 | 9 | 11 | 8 | 7 | 5 | 5 | 8 |
| 3 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 2 | 1 | 1 | 1 |
| 2 | 3 | 3 | 4 | 5 | 6 | 6 | 6 | 5 | 3 | 2 | 2 |
| 149 | 127 | 165 | 200 | 195 | 222 | 212 | 239 | 226 | 221 | 212 | 172 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 8°C Lo -1°C | Hi 11°C Lo 1°C | Hi 16°C Lo 5°C | Hi 21°C Lo 9°C | Hi 25°C Lo 13°C | Hi 29°C Lo 18°C | Hi 31°C Lo 20°C | Hi 30°C Lo 19°C | Hi 28°C Lo 16°C | Hi 21°C Lo 10°C | Hi 15°C Lo 4°C | Hi 10°C Lo 2°C |
| 9 km/h | 9 km/h | 9 km/h | 9 km/h | 8 km/h | 7 km/h | 6 km/h | 6 km/h | 6 km/h | 7 km/h | 7 km/h | 8 km/h |
| 116 mm | 118 mm | 118 mm | 107 mm | 113 mm | 94 mm | 119 mm | 94 mm | 105 mm | 89 mm | 95 mm | 120 mm |
| 76% | 77% | 75% | 73% | 75% | 73% | 73% | 72% | 73% | 74% | 72% | 77% |
| 49% | 52% | 45% | 37% | 38% | 31% | 35% | 32% | 33% | 33% | 36% | 46% |
| 1021 mb | 1020 mb | 1019 mb | 1017 mb | 1017 mb | 1015 mb | 1016 mb | 1016 mb | 1017 mb | 1018 mb | 1021 mb | 1021 mb |
| 20 | 18 | 22 | 23 | 22 | 21 | 21 | 23 | 23 | 26 | 24 | 22 |
| 8 | 8 | 9 | 7 | 9 | 9 | 11 | 8 | 7 | 5 | 5 | 8 |
| 3 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 2 | 1 | 1 | 1 |
| 2 | 3 | 3 | 4 | 5 | 6 | 6 | 6 | 5 | 3 | 2 | 2 |
| 149 | 127 | 165 | 200 | 195 | 222 | 212 | 239 | 226 | 221 | 212 | 172 |
| 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.