Weather World
Riley Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 29°F Lo 18°F | Hi 32°F Lo 19°F | Hi 43°F Lo 28°F | Hi 54°F Lo 37°F | Hi 66°F Lo 48°F | Hi 75°F Lo 57°F | Hi 80°F Lo 63°F | Hi 78°F Lo 61°F | Hi 72°F Lo 55°F | Hi 59°F Lo 45°F | Hi 46°F Lo 34°F | Hi 35°F Lo 26°F |
| 10 mph | 10 mph | 10 mph | 10 mph | 8 mph | 8 mph | 7 mph | 7 mph | 8 mph | 10 mph | 10 mph | 10 mph |
| 2.1 in | 2.5 in | 3.5 in | 5 in | 4.1 in | 4.8 in | 3.8 in | 3.4 in | 2.9 in | 3.4 in | 2.4 in | 2.5 in |
| 85% | 85% | 77% | 75% | 76% | 76% | 77% | 77% | 77% | 76% | 77% | 82% |
| 68% | 66% | 57% | 53% | 43% | 36% | 33% | 34% | 36% | 46% | 50% | 64% |
| 30.1 in | 30.1 in | 30.1 in | 30.0 in | 30.0 in | 29.9 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.1 in | 30.1 in |
| 17 | 15 | 21 | 20 | 22 | 22 | 23 | 24 | 24 | 24 | 22 | 20 |
| 9 | 8 | 7 | 9 | 9 | 8 | 8 | 7 | 6 | 7 | 6 | 7 |
| 5 | 5 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 4 |
| 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 2 | 1 | 1 | 2 |
| 1 | 1 | 2 | 3 | 4 | 5 | 5 | 5 | 3 | 2 | 1 | 1 |
| 76 | 80 | 118 | 131 | 166 | 188 | 211 | 212 | 205 | 154 | 145 | 87 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi -2°C Lo -8°C | Hi -0°C Lo -7°C | Hi 6°C Lo -2°C | Hi 12°C Lo 3°C | Hi 19°C Lo 9°C | Hi 24°C Lo 14°C | Hi 27°C Lo 17°C | Hi 26°C Lo 16°C | Hi 22°C Lo 13°C | Hi 15°C Lo 7°C | Hi 8°C Lo 1°C | Hi 2°C Lo -3°C |
| 17 km/h | 16 km/h | 17 km/h | 16 km/h | 14 km/h | 13 km/h | 11 km/h | 11 km/h | 12 km/h | 15 km/h | 17 km/h | 16 km/h |
| 54 mm | 64 mm | 89 mm | 128 mm | 105 mm | 122 mm | 96 mm | 85 mm | 74 mm | 86 mm | 61 mm | 64 mm |
| 85% | 85% | 77% | 75% | 76% | 76% | 77% | 77% | 77% | 76% | 77% | 82% |
| 68% | 66% | 57% | 53% | 43% | 36% | 33% | 34% | 36% | 46% | 50% | 64% |
| 1018 mb | 1018 mb | 1018 mb | 1015 mb | 1016 mb | 1013 mb | 1014 mb | 1015 mb | 1017 mb | 1016 mb | 1018 mb | 1018 mb |
| 17 | 15 | 21 | 20 | 22 | 22 | 23 | 24 | 24 | 24 | 22 | 20 |
| 9 | 8 | 7 | 9 | 9 | 8 | 8 | 7 | 6 | 7 | 6 | 7 |
| 5 | 5 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 4 |
| 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 2 | 1 | 1 | 2 |
| 1 | 1 | 2 | 3 | 4 | 5 | 5 | 5 | 3 | 2 | 1 | 1 |
| 76 | 80 | 118 | 131 | 166 | 188 | 211 | 212 | 205 | 154 | 145 | 87 |
| 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.