Wilmington, Illinois Climate
United States
Pop. 5,694 Elev. 166 m / 545 ft
TZ: America/Chicago (UTC-5) ·
Wilmington is largely arid, with warm summers peaking at 86°F (30°C) in July and cold winters around 16°F (-9°C) in January. Humidity pushes the summer feels-like temperature to 98°F (37°C), while wind chill can drive winter lows to 7°F (-14°C). Precipitation occurs on roughly 43 days per year (34.4 in / 873 mm total), with snow on 4 days and 32 in (824 mm) of annual accumulation. The city averages 116 sunny days per year and around 33 thunderstorm days. Ocean water temperatures reach 77°F (25°C) in summer.
| Temperature | 86°F (30°C) high | 16°F (-9°C) low |
| Feels like | 98°F (37°C) high | 7°F (-14°C) low |
| Rain | 43 days | 34.4 in (873 mm) /yr |
| Snow | 4 days | 32.5 in (824 mm) /yr |
| Sky | 116 sunny | 33 stormy |
| Wind | 2.8 mph (1.2 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Sep, Oct
Sky & Air by Month
Cloud cover (%)
55
Jan 63
Feb 54
Mar 67
Apr 61
May 54
Jun 64
Jul 53
Aug 35
Sep 46
Oct 56
Nov 76
Dec Humidity (%)
62
Jan 65
Feb 57
Mar 59
Apr 63
May 67
Jun 74
Jul 74
Aug 64
Sep 63
Oct 66
Nov 77
Dec Weather Days by Month
Water Temperatures
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Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 39 mi Chicago Midway International Airport (MDW)
Ski resort 33 mi
National park 38 mi Historic Pullman Foundation Exhibit Hall
Hospital 15 mi Saint Joseph Medical Center
Hiking trail 23 mi Brown Paved Trail
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 32°F 0°C | 16°F -9°C | 0.6 in 15 mm | 5.9 in150 mm | 13 |
| February | 37°F 3°C | 21°F -6°C | 0.2 in 6 mm | 6.5 in164 mm | 8 |
| March | 59°F 15°C | 37°F 3°C | 3.5 in 89 mm | 3.6 in92 mm | 11 |
| April | 64°F 18°C | 44°F 7°C | 3.8 in 97 mm | 0.1 in2 mm | 5 |
| May | 71°F 22°C | 51°F 11°C | 3.8 in 96 mm | — | 9 |
| June | 84°F 29°C | 65°F 19°C | 5.2 in 133 mm | — | 10 |
| July | 86°F 30°C | 70°F 21°C | 5.7 in 144 mm | — | 5 |
| August | 81°F 27°C | 64°F 18°C | 3.8 in 96 mm | — | 10 |
| September | 81°F 27°C | 57°F 14°C | 1.4 in 35 mm | — | 19 |
| October | 69°F 20°C | 49°F 10°C | 3.5 in 89 mm | — | 13 |
| November | 52°F 11°C | 36°F 2°C | 1.2 in 30 mm | 9.1 in232 mm | 10 |
| December | 36°F 2°C | 21°F -6°C | 1.7 in 43 mm | 7.3 in184 mm | 3 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 13 | 1 |
| February | 8 | 0 |
| March | 11 | 5 |
| April | 5 | 3 |
| May | 9 | 3 |
| June | 10 | 4 |
| July | 5 | 8 |
| August | 10 | 3 |
| September | 19 | 2 |
| October | 13 | 3 |
| November | 10 | 0 |
| December | 3 | 1 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 36°F 2°C | 32°F 0°C |
| February | 33°F 1°C | 32°F 0°C |
| March | 38°F 4°C | 40°F 4°C |
| April | 47°F 8°C | 49°F 10°C |
| May | 54°F 12°C | 57°F 14°C |
| June | 71°F 22°C | 70°F 21°C |
| July | 76°F 25°C | 78°F 25°C |
| August | 77°F 25°C | 74°F 23°C |
| September | 69°F 21°C | 68°F 20°C |
| October | 66°F 19°C | 59°F 15°C |
| November | 53°F 12°C | 44°F 6°C |
| December | 43°F 6°C | 33°F 1°C |