South Wilmington, IL
Climate overview — based on NOAA 1991-2020 normals from DWIGHT, IL US.
Year-round temperatures (°F)
Climate summary
South Wilmington has an annual average temperature of 49.3°F with about 37.7 inches of precipitation per year and 23.3 inches of snow. The warmest month is July (average high 83.5°F), and the coldest is January (average low 14.0°F). May is typically the wettest month (4.85 in) and February the driest (1.64 in). Snow typically falls from November through April.
Best time to visit South Wilmington
Full guide →Climate change signal
All-time records →110 of 366 (30.1%) of South Wilmington's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1990s | 105 | |
| 2000s | 96 | |
| 2010s | 93 | |
| 2020s | 72 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 30.7°F | 14.0°F | 22.3°F | 1.96 in | 7.9 in | 7 |
| February | 35.0°F | 17.3°F | 26.2°F | 1.64 in | 4.9 in | 6 |
| March | 47.5°F | 26.7°F | 37.1°F | 2.55 in | 3.5 in | 8 |
| April | 60.8°F | 36.9°F | 48.8°F | 3.54 in | 0.6 in | 11 |
| May | 72.1°F | 49.3°F | 60.7°F | 4.85 in | — | 11 |
| June | 81.1°F | 59.1°F | 70.1°F | 4.60 in | — | 9 |
| July | 83.5°F | 62.1°F | 72.8°F | 3.90 in | — | 8 |
| August | 81.9°F | 59.4°F | 70.7°F | 3.68 in | — | 8 |
| September | 77.1°F | 51.3°F | 64.2°F | 3.25 in | — | 7 |
| October | 64.1°F | 40.2°F | 52.1°F | 3.19 in | — | 8 |
| November | 48.5°F | 29.4°F | 39.0°F | 2.58 in | 0.8 in | 8 |
| December | 36.1°F | 19.6°F | 27.8°F | 1.95 in | 5.6 in | 8 |
Climate twins of South Wilmington
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).