Wheaton, Illinois Climate
United States
Pop. 53,715 Elev. 233 m / 764 ft
TZ: America/Chicago (UTC-5) ·
Wheaton has a dry climate with warm summers reaching 85°F (29°C) in July and cold winters averaging 16°F (-9°C) in January. Humidity pushes the summer feels-like temperature to 95°F (35°C), while wind chill can drive winter lows to 7°F (-14°C). Rain falls on about 47 days per year (33.2 in / 844 mm total), with snow on 5 days and 36 in (923 mm) of annual accumulation. The city averages 111 sunny days per year and around 36 thunderstorm days. Ocean water temperatures reach 75°F (24°C) in summer.
| Temperature | 85°F (30°C) high | 16°F (-9°C) low |
| Feels like | 95°F (35°C) high | 7°F (-14°C) low |
| Rain | 47 days | 33.2 in (844 mm) /yr |
| Snow | 5 days | 36.4 in (923 mm) /yr |
| Sky | 111 sunny | 36 stormy |
| Wind | 2.6 mph (1.1 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Apr, Sep, Oct
Sky & Air by Month
Cloud cover (%)
56
Jan 65
Feb 57
Mar 67
Apr 62
May 53
Jun 62
Jul 53
Aug 35
Sep 47
Oct 58
Nov 76
Dec Humidity (%)
60
Jan 65
Feb 59
Mar 61
Apr 65
May 66
Jun 73
Jul 72
Aug 69
Sep 68
Oct 67
Nov 75
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 13 mi Chicago O'Hare International Airport (ORD)
Ski resort 4 mi
National park 28 mi Historic Pullman Foundation Exhibit Hall
Hospital 2 mi Marianjoy Rehabilitation Hospital
Hiking trail 4 mi Red Maple Allée
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 31°F -1°C | 16°F -9°C | 0.8 in 21 mm | 5.2 in133 mm | 14 |
| February | 35°F 2°C | 20°F -7°C | 0.1 in 3 mm | 8.1 in206 mm | 4 |
| March | 57°F 14°C | 36°F 2°C | 3.5 in 90 mm | 4.6 in117 mm | 10 |
| April | 61°F 16°C | 43°F 6°C | 2.7 in 68 mm | 0.1 in4 mm | 6 |
| May | 68°F 20°C | 50°F 10°C | 4.1 in 105 mm | — | 8 |
| June | 83°F 28°C | 64°F 18°C | 5.4 in 138 mm | — | 10 |
| July | 85°F 30°C | 69°F 21°C | 4.9 in 125 mm | — | 7 |
| August | 80°F 27°C | 64°F 18°C | 3.8 in 97 mm | — | 10 |
| September | 78°F 26°C | 57°F 14°C | 1.6 in 40 mm | — | 17 |
| October | 66°F 19°C | 49°F 10°C | 3.2 in 81 mm | — | 13 |
| November | 50°F 10°C | 36°F 2°C | 1.0 in 26 mm | 10.7 in272 mm | 9 |
| December | 35°F 2°C | 21°F -6°C | 2.0 in 51 mm | 7.5 in192 mm | 3 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 14 | 1 |
| February | 4 | 0 |
| March | 10 | 4 |
| April | 6 | 1 |
| May | 8 | 4 |
| June | 10 | 6 |
| July | 7 | 7 |
| August | 10 | 6 |
| September | 17 | 4 |
| October | 13 | 2 |
| November | 9 | 0 |
| December | 3 | 1 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 37°F 3°C | 32°F 0°C |
| February | 35°F 1°C | 32°F 0°C |
| March | 37°F 3°C | 40°F 4°C |
| April | 44°F 7°C | 49°F 10°C |
| May | 49°F 9°C | 57°F 14°C |
| June | 67°F 20°C | 70°F 21°C |
| July | 75°F 24°C | 78°F 25°C |
| August | 74°F 24°C | 74°F 23°C |
| September | 69°F 21°C | 68°F 20°C |
| October | 67°F 20°C | 59°F 15°C |
| November | 52°F 11°C | 44°F 6°C |
| December | 43°F 6°C | 33°F 1°C |