Delavan, Illinois Climate
United States
Pop. 1,633 Elev. 190 m / 623 ft
TZ: America/Chicago (UTC-5) ·
Delavan has warm summers with average highs of 87°F (31°C) in July, and frigid 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 50 days per year (31.8 in / 807 mm total), with snow on 5 days and 28 in (720 mm) of annual accumulation. The city averages 128 sunny days per year and around 38 thunderstorm days. Nearby lake water reaches 79°F (26°C) in summer.
| Temperature | 87°F (31°C) high | 18°F (-8°C) low |
| Feels like | 102°F (39°C) high | 10°F (-12°C) low |
| Rain | 50 days | 31.8 in (807 mm) /yr |
| Snow | 5 days | 28.4 in (720 mm) /yr |
| Sky | 128 sunny | 38 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 (%)
51
Jan 59
Feb 52
Mar 67
Apr 57
May 54
Jun 66
Jul 49
Aug 36
Sep 43
Oct 50
Nov 69
Dec Humidity (%)
64
Jan 64
Feb 55
Mar 60
Apr 60
May 71
Jun 77
Jul 74
Aug 60
Sep 59
Oct 66
Nov 78
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 22 mi General Wayne A. Downing Peoria International Airport (PIA)
Ski resort 124 mi
National park 136 mi Historic Pullman Foundation Exhibit Hall
Hospital 8 mi Hopedale Medical Complex
Hiking trail 22 mi Meadow Valley Park
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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 8 mm | 6.9 in175 mm | 15 |
| February | 40°F 4°C | 23°F -5°C | 0.3 in 7 mm | 4.3 in109 mm | 9 |
| March | 62°F 17°C | 39°F 4°C | 3.1 in 80 mm | 2.0 in52 mm | 11 |
| April | 67°F 19°C | 47°F 8°C | 4.6 in 117 mm | — | 4 |
| May | 74°F 24°C | 54°F 12°C | 3.7 in 94 mm | — | 10 |
| June | 84°F 29°C | 67°F 19°C | 5.4 in 136 mm | — | 10 |
| July | 87°F 31°C | 71°F 22°C | 6.1 in 154 mm | — | 4 |
| August | 83°F 28°C | 64°F 18°C | 2.0 in 51 mm | — | 15 |
| September | 83°F 28°C | 57°F 14°C | 0.9 in 23 mm | — | 19 |
| October | 72°F 22°C | 51°F 11°C | 2.7 in 68 mm | — | 14 |
| November | 54°F 12°C | 37°F 3°C | 1.6 in 41 mm | 7.2 in184 mm | 11 |
| December | 39°F 4°C | 22°F -5°C | 1.1 in 28 mm | 7.9 in200 mm | 6 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 15 | 0 |
| February | 9 | 0 |
| March | 11 | 3 |
| April | 4 | 8 |
| May | 10 | 2 |
| June | 10 | 5 |
| July | 4 | 11 |
| August | 15 | 4 |
| September | 19 | 2 |
| October | 14 | 1 |
| November | 11 | 1 |
| December | 6 | 1 |
Water Temperatures Data
↑ See chart| Month | Lake Avg High |
|---|---|
| January | 32°F 0°C |
| February | 32°F 0°C |
| March | 42°F 6°C |
| April | 53°F 12°C |
| May | 61°F 16°C |
| June | 73°F 23°C |
| July | 79°F 26°C |
| August | 75°F 24°C |
| September | 68°F 20°C |
| October | 59°F 15°C |
| November | 43°F 6°C |
| December | 32°F 0°C |