Glen Ellyn, Illinois Climate
United States
Pop. 28,201 Elev. 227 m / 745 ft
TZ: America/Chicago (UTC-5) ·
Glen Ellyn is largely arid, with warm summers peaking at 85°F (29°C) in July and cold winters around 16°F (-9°C) in January. Humidity pushes the summer feels-like temperature to 94°F (34°C), while wind chill can drive winter lows to 6°F (-14°C). Precipitation occurs on roughly 45 days per year (32.0 in / 812 mm total), with snow on 4 days and 36 in (926 mm) of annual accumulation. The city averages 113 sunny days per year and around 32 thunderstorm days. Ocean water temperatures reach 75°F (24°C) in summer.
| Temperature | 85°F (29°C) high | 16°F (-9°C) low |
| Feels like | 94°F (34°C) high | 6°F (-14°C) low |
| Rain | 45 days | 32.0 in (812 mm) /yr |
| Snow | 4 days | 36.5 in (926 mm) /yr |
| Sky | 113 sunny | 32 stormy |
| Wind | 2.6 mph (1.1 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 66
Feb 58
Mar 67
Apr 62
May 53
Jun 61
Jul 51
Aug 34
Sep 46
Oct 58
Nov 78
Dec Humidity (%)
59
Jan 66
Feb 60
Mar 62
Apr 67
May 66
Jun 73
Jul 72
Aug 69
Sep 68
Oct 67
Nov 73
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 11 mi Chicago O'Hare International Airport (ORD)
Ski resort 5 mi
National park 27 mi Historic Pullman Foundation Exhibit Hall
Hospital 3 mi UChicago Medicine AdventHealth GlenOaks
Hiking trail 6 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 | 1.3 in 32 mm | 4.5 in114 mm | 13 |
| February | 34°F 1°C | 19°F -7°C | 0.1 in 3 mm | 9.2 in233 mm | 3 |
| March | 56°F 14°C | 35°F 2°C | 3.2 in 82 mm | 4.7 in119 mm | 9 |
| April | 60°F 15°C | 42°F 6°C | 2.9 in 73 mm | 0.2 in5 mm | 5 |
| May | 66°F 19°C | 49°F 9°C | 3.9 in 98 mm | — | 8 |
| June | 83°F 28°C | 64°F 18°C | 4.9 in 124 mm | — | 10 |
| July | 85°F 29°C | 69°F 21°C | 5.1 in 130 mm | — | 8 |
| August | 80°F 27°C | 64°F 18°C | 3.5 in 88 mm | — | 14 |
| September | 77°F 25°C | 57°F 14°C | 1.6 in 40 mm | — | 18 |
| October | 65°F 18°C | 49°F 10°C | 2.6 in 67 mm | — | 14 |
| November | 49°F 10°C | 36°F 2°C | 1.2 in 30 mm | 10.8 in273 mm | 9 |
| December | 35°F 2°C | 21°F -6°C | 1.7 in 44 mm | 7.2 in183 mm | 2 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 13 | 1 |
| February | 3 | 0 |
| March | 9 | 4 |
| April | 5 | 1 |
| May | 8 | 3 |
| June | 10 | 5 |
| July | 8 | 7 |
| August | 14 | 4 |
| September | 18 | 4 |
| October | 14 | 2 |
| November | 9 | 0 |
| December | 2 | 1 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 37°F 3°C | 33°F 0°C |
| February | 35°F 1°C | 32°F 0°C |
| March | 37°F 3°C | 37°F 3°C |
| April | 44°F 7°C | 46°F 8°C |
| May | 49°F 9°C | 54°F 12°C |
| June | 67°F 20°C | 66°F 19°C |
| July | 75°F 24°C | 77°F 25°C |
| August | 74°F 24°C | 74°F 23°C |
| September | 69°F 21°C | 67°F 20°C |
| October | 67°F 20°C | 60°F 15°C |
| November | 52°F 11°C | 45°F 7°C |
| December | 43°F 6°C | 34°F 1°C |