Williamsville, Illinois Climate
United States
Pop. 1,496 Elev. 183 m / 600 ft
TZ: America/Chicago (UTC-5) ·
Williamsville has a dry climate with warm summers reaching 87°F (31°C) in July and cold winters averaging 18°F (-8°C) in January. Humidity pushes the summer feels-like temperature to 102°F (39°C), while wind chill can drive winter lows to 10°F (-12°C). Rain falls on about 49 days per year (33.3 in / 845 mm total), with snow on 6 days and 30 in (751 mm) of annual accumulation. The city averages 132 sunny days per year and around 34 thunderstorm days.
| Temperature | 87°F (31°C) high | 18°F (-8°C) low |
| Feels like | 102°F (39°C) high | 10°F (-12°C) low |
| Rain | 49 days | 33.3 in (845 mm) /yr |
| Snow | 6 days | 29.6 in (751 mm) /yr |
| Sky | 132 sunny | 34 stormy |
| Wind | 2.7 mph (1.2 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Mar, Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
50
Jan 59
Feb 52
Mar 68
Apr 57
May 56
Jun 65
Jul 48
Aug 35
Sep 43
Oct 50
Nov 68
Dec Humidity (%)
66
Jan 64
Feb 55
Mar 60
Apr 61
May 72
Jun 78
Jul 73
Aug 61
Sep 60
Oct 66
Nov 78
Dec Weather Days by Month
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 10 mi Abraham Lincoln Capital Airport (SPI)
Ski resort 114 mi Hidden Valley
National park 150 mi Emmett Till and Mamie Till-Mobley National Monument
Hospital 5 mi HSHS Medical Group - Family Medicine
Hiking trail 29 mi River Trail
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 33°F 1°C | 18°F -8°C | 0.3 in 9 mm | 7.9 in200 mm | 14 |
| February | 40°F 4°C | 24°F -4°C | 0.3 in 7 mm | 5.0 in128 mm | 10 |
| March | 62°F 17°C | 40°F 4°C | 2.8 in 72 mm | 1.4 in37 mm | 12 |
| April | 67°F 20°C | 47°F 8°C | 5.0 in 126 mm | 0.1 in1 mm | 4 |
| May | 74°F 24°C | 54°F 12°C | 3.8 in 96 mm | — | 11 |
| June | 84°F 29°C | 67°F 19°C | 6.0 in 152 mm | — | 10 |
| July | 87°F 31°C | 71°F 22°C | 6.4 in 162 mm | — | 5 |
| August | 83°F 28°C | 64°F 18°C | 1.9 in 47 mm | — | 15 |
| September | 83°F 28°C | 57°F 14°C | 1.1 in 28 mm | — | 19 |
| October | 72°F 22°C | 51°F 11°C | 3.2 in 82 mm | — | 14 |
| November | 54°F 12°C | 37°F 3°C | 1.7 in 43 mm | 7.3 in187 mm | 12 |
| December | 39°F 4°C | 23°F -5°C | 0.8 in 22 mm | 7.8 in198 mm | 6 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 14 | 0 |
| February | 10 | 0 |
| March | 12 | 2 |
| April | 4 | 6 |
| May | 11 | 3 |
| June | 10 | 6 |
| July | 5 | 11 |
| August | 15 | 3 |
| September | 19 | 1 |
| October | 14 | 1 |
| November | 12 | 1 |
| December | 6 | 0 |