WeatherWX.com
Romeroville Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 43°F Lo 22°F | Hi 45°F Lo 23°F | Hi 55°F Lo 31°F | Hi 62°F Lo 36°F | Hi 70°F Lo 44°F | Hi 81°F Lo 55°F | Hi 82°F Lo 59°F | Hi 80°F Lo 57°F | Hi 75°F Lo 52°F | Hi 63°F Lo 40°F | Hi 53°F Lo 30°F | Hi 43°F Lo 23°F |
| 8 mph | 9 mph | 10 mph | 10 mph | 10 mph | 8 mph | 7 mph | 7 mph | 7 mph | 8 mph | 8 mph | 9 mph |
| 0.2 in | 0.3 in | 0.4 in | 0.4 in | 0.7 in | 0.5 in | 1.1 in | 1 in | 0.8 in | 0.7 in | 0.2 in | 0.3 in |
| 59% | 56% | 43% | 36% | 37% | 38% | 50% | 49% | 50% | 48% | 47% | 57% |
| 19% | 21% | 20% | 19% | 18% | 17% | 24% | 20% | 18% | 15% | 15% | 20% |
| 30.1 in | 30.0 in | 30.0 in | 29.9 in | 29.9 in | 29.9 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.1 in | 30.1 in |
| 27 | 23 | 27 | 27 | 26 | 26 | 22 | 23 | 25 | 27 | 27 | 26 |
| 3 | 3 | 3 | 3 | 5 | 5 | 9 | 8 | 5 | 3 | 2 | 3 |
| 2 | 3 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2 | 2 | 3 | 3 | 4 | 5 | 5 | 5 | 4 | 3 | 2 | 2 |
| 101 | 90 | 98 | 97 | 102 | 103 | 99 | 103 | 98 | 105 | 103 | 100 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 6°C Lo -6°C | Hi 7°C Lo -5°C | Hi 13°C Lo -1°C | Hi 16°C Lo 3°C | Hi 21°C Lo 7°C | Hi 27°C Lo 13°C | Hi 28°C Lo 15°C | Hi 27°C Lo 14°C | Hi 24°C Lo 11°C | Hi 17°C Lo 4°C | Hi 12°C Lo -1°C | Hi 6°C Lo -5°C |
| 13 km/h | 15 km/h | 16 km/h | 16 km/h | 15 km/h | 14 km/h | 11 km/h | 11 km/h | 12 km/h | 13 km/h | 14 km/h | 14 km/h |
| 6 mm | 7 mm | 11 mm | 10 mm | 18 mm | 14 mm | 29 mm | 25 mm | 19 mm | 17 mm | 5 mm | 7 mm |
| 59% | 56% | 43% | 36% | 37% | 38% | 50% | 49% | 50% | 48% | 47% | 57% |
| 19% | 21% | 20% | 19% | 18% | 17% | 24% | 20% | 18% | 15% | 15% | 20% |
| 1020 mb | 1017 mb | 1015 mb | 1011 mb | 1012 mb | 1012 mb | 1015 mb | 1015 mb | 1016 mb | 1016 mb | 1019 mb | 1019 mb |
| 27 | 23 | 27 | 27 | 26 | 26 | 22 | 23 | 25 | 27 | 27 | 26 |
| 3 | 3 | 3 | 3 | 5 | 5 | 9 | 8 | 5 | 3 | 2 | 3 |
| 2 | 3 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2 | 2 | 3 | 3 | 4 | 5 | 5 | 5 | 4 | 3 | 2 | 2 |
| 101 | 90 | 98 | 97 | 102 | 103 | 99 | 103 | 98 | 105 | 103 | 100 |
| 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.