Weather World
Grass Valley Service Center Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 54°F Lo 39°F | Hi 54°F Lo 39°F | Hi 57°F Lo 41°F | Hi 64°F Lo 44°F | Hi 72°F Lo 50°F | Hi 84°F Lo 58°F | Hi 92°F Lo 64°F | Hi 91°F Lo 63°F | Hi 85°F Lo 60°F | Hi 73°F Lo 52°F | Hi 60°F Lo 43°F | Hi 53°F Lo 39°F |
| 5 mph | 6 mph | 6 mph | 6 mph | 6 mph | 6 mph | 5 mph | 5 mph | 5 mph | 5 mph | 5 mph | 5 mph |
| 9 in | 12 in | 11.3 in | 4.9 in | 2.3 in | 0.6 in | 0 in | 0.1 in | 0.6 in | 3.9 in | 8.1 in | 13.3 in |
| 69% | 70% | 74% | 67% | 57% | 43% | 34% | 35% | 38% | 44% | 57% | 68% |
| 36% | 38% | 43% | 31% | 21% | 10% | 4% | 5% | 10% | 18% | 29% | 39% |
| 30.2 in | 30.1 in | 30.1 in | 30.0 in | 29.9 in | 29.9 in | 29.9 in | 29.9 in | 29.9 in | 30.0 in | 30.1 in | 30.1 in |
| 23 | 19 | 20 | 25 | 27 | 28 | 31 | 30 | 28 | 28 | 24 | 21 |
| 8 | 8 | 10 | 5 | 4 | 2 | 0 | 1 | 2 | 3 | 6 | 9 |
| 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 3 | 3 | 3 | 4 | 5 | 7 | 7 | 6 | 5 | 4 | 3 | 2 |
| 212 | 184 | 184 | 232 | 270 | 307 | 338 | 359 | 326 | 291 | 239 | 210 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 12°C Lo 4°C | Hi 13°C Lo 4°C | Hi 14°C Lo 5°C | Hi 18°C Lo 7°C | Hi 23°C Lo 10°C | Hi 29°C Lo 15°C | Hi 33°C Lo 18°C | Hi 33°C Lo 17°C | Hi 30°C Lo 15°C | Hi 23°C Lo 11°C | Hi 16°C Lo 6°C | Hi 11°C Lo 4°C |
| 9 km/h | 9 km/h | 9 km/h | 9 km/h | 9 km/h | 9 km/h | 9 km/h | 8 km/h | 9 km/h | 9 km/h | 8 km/h | 8 km/h |
| 229 mm | 305 mm | 287 mm | 124 mm | 57 mm | 16 mm | 1 mm | 3 mm | 16 mm | 99 mm | 205 mm | 338 mm |
| 69% | 70% | 74% | 67% | 57% | 43% | 34% | 35% | 38% | 44% | 57% | 68% |
| 36% | 38% | 43% | 31% | 21% | 10% | 4% | 5% | 10% | 18% | 29% | 39% |
| 1021 mb | 1019 mb | 1018 mb | 1016 mb | 1014 mb | 1012 mb | 1013 mb | 1013 mb | 1013 mb | 1015 mb | 1019 mb | 1020 mb |
| 23 | 19 | 20 | 25 | 27 | 28 | 31 | 30 | 28 | 28 | 24 | 21 |
| 8 | 8 | 10 | 5 | 4 | 2 | 0 | 1 | 2 | 3 | 6 | 9 |
| 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 3 | 3 | 3 | 4 | 5 | 7 | 7 | 6 | 5 | 4 | 3 | 2 |
| 212 | 184 | 184 | 232 | 270 | 307 | 338 | 359 | 326 | 291 | 239 | 210 |
| 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.