WeatherWX.com
Walnut Creek Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 51°F Lo 35°F | Hi 56°F Lo 38°F | Hi 62°F Lo 44°F | Hi 71°F Lo 53°F | Hi 78°F Lo 61°F | Hi 85°F Lo 68°F | Hi 89°F Lo 72°F | Hi 87°F Lo 71°F | Hi 82°F Lo 66°F | Hi 73°F Lo 56°F | Hi 62°F Lo 45°F | Hi 55°F Lo 40°F |
| 8 mph | 8 mph | 9 mph | 9 mph | 8 mph | 7 mph | 6 mph | 6 mph | 7 mph | 7 mph | 7 mph | 7 mph |
| 3.5 in | 3.5 in | 3.6 in | 3.4 in | 4 in | 4.6 in | 5.1 in | 6.2 in | 6 in | 3.5 in | 3.5 in | 3.9 in |
| 72% | 74% | 72% | 72% | 76% | 76% | 77% | 77% | 77% | 75% | 72% | 75% |
| 39% | 43% | 41% | 35% | 40% | 36% | 37% | 39% | 38% | 33% | 34% | 40% |
| 30.1 in | 30.1 in | 30.1 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.1 in | 30.1 in |
| 23 | 20 | 23 | 24 | 21 | 18 | 17 | 17 | 20 | 26 | 25 | 24 |
| 7 | 7 | 7 | 6 | 10 | 12 | 14 | 14 | 10 | 5 | 5 | 7 |
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2 | 3 | 4 | 4 | 6 | 6 | 6 | 6 | 5 | 4 | 3 | 3 |
| 203 | 169 | 182 | 210 | 199 | 218 | 212 | 196 | 199 | 223 | 220 | 201 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 11°C Lo 2°C | Hi 13°C Lo 4°C | Hi 17°C Lo 7°C | Hi 22°C Lo 12°C | Hi 26°C Lo 16°C | Hi 30°C Lo 20°C | Hi 32°C Lo 22°C | Hi 31°C Lo 22°C | Hi 28°C Lo 19°C | Hi 23°C Lo 13°C | Hi 16°C Lo 7°C | Hi 13°C Lo 5°C |
| 12 km/h | 13 km/h | 14 km/h | 14 km/h | 12 km/h | 11 km/h | 10 km/h | 9 km/h | 11 km/h | 12 km/h | 12 km/h | 12 km/h |
| 90 mm | 88 mm | 90 mm | 86 mm | 100 mm | 117 mm | 130 mm | 157 mm | 153 mm | 88 mm | 90 mm | 99 mm |
| 72% | 74% | 72% | 72% | 76% | 76% | 77% | 77% | 77% | 75% | 72% | 75% |
| 39% | 43% | 41% | 35% | 40% | 36% | 37% | 39% | 38% | 33% | 34% | 40% |
| 1020 mb | 1020 mb | 1019 mb | 1017 mb | 1017 mb | 1015 mb | 1015 mb | 1015 mb | 1016 mb | 1017 mb | 1021 mb | 1020 mb |
| 23 | 20 | 23 | 24 | 21 | 18 | 17 | 17 | 20 | 26 | 25 | 24 |
| 7 | 7 | 7 | 6 | 10 | 12 | 14 | 14 | 10 | 5 | 5 | 7 |
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2 | 3 | 4 | 4 | 6 | 6 | 6 | 6 | 5 | 4 | 3 | 3 |
| 203 | 169 | 182 | 210 | 199 | 218 | 212 | 196 | 199 | 223 | 220 | 201 |
| 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.