Winnebago, Illinois Climate
United States
Pop. 3,012 Elev. 268 m / 879 ft
TZ: America/Chicago (UTC-5) ·
Dry and warm, Winnebago sees July highs of 85°F (29°C) and cold January lows of 14°F (-10°C). Humidity pushes the summer feels-like temperature to 94°F (34°C), while wind chill can drive winter lows to 5°F (-15°C). Expect around 41 rainy days annually (31.6 in / 803 mm total), with snow on 6 days and 36 in (907 mm) of annual accumulation. The city averages 120 sunny days per year and around 31 thunderstorm days. Nearby lake water reaches 77°F (25°C) in summer.
| Temperature | 85°F (30°C) high | 14°F (-10°C) low |
| Feels like | 94°F (34°C) high | 5°F (-15°C) low |
| Rain | 41 days | 31.6 in (803 mm) /yr |
| Snow | 6 days | 35.7 in (907 mm) /yr |
| Sky | 120 sunny | 31 stormy |
| Wind | 2.4 mph (1.1 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Apr, May, Sep, Oct
Sky & Air by Month
Cloud cover (%)
53
Jan 63
Feb 55
Mar 67
Apr 58
May 53
Jun 59
Jul 52
Aug 39
Sep 46
Oct 56
Nov 76
Dec Humidity (%)
60
Jan 65
Feb 60
Mar 60
Apr 60
May 63
Jun 72
Jul 73
Aug 68
Sep 67
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 9 mi Chicago Rockford International Airport (RFD)
Ski resort 59 mi Blackhawk Ski Club
National park 93 mi Historic Pullman Foundation Exhibit Hall
Hospital 8 mi Mercyhealth Hospital–Rockton Avenue
Hiking trail 14 mi Lone Rock Trail
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 30°F -1°C | 14°F -10°C | 0.4 in 10 mm | 2.2 in56 mm | 13 |
| February | 33°F 1°C | 17°F -8°C | 0.2 in 6 mm | 7.8 in198 mm | 6 |
| March | 56°F 13°C | 33°F 1°C | 3.1 in 80 mm | 8.1 in206 mm | 9 |
| April | 61°F 16°C | 42°F 5°C | 3.1 in 79 mm | 0.1 in2 mm | 4 |
| May | 70°F 21°C | 50°F 10°C | 3.0 in 77 mm | — | 12 |
| June | 84°F 29°C | 64°F 18°C | 4.6 in 118 mm | — | 10 |
| July | 85°F 30°C | 69°F 20°C | 6.2 in 157 mm | — | 8 |
| August | 80°F 27°C | 62°F 17°C | 4.9 in 123 mm | — | 14 |
| September | 78°F 25°C | 56°F 13°C | 2.0 in 52 mm | — | 17 |
| October | 66°F 19°C | 48°F 9°C | 1.5 in 39 mm | — | 12 |
| November | 49°F 9°C | 34°F 1°C | 0.9 in 23 mm | 10.5 in267 mm | 11 |
| December | 33°F 1°C | 18°F -8°C | 1.5 in 39 mm | 7.0 in178 mm | 4 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 13 | 0 |
| February | 6 | 0 |
| March | 9 | 4 |
| April | 4 | 2 |
| May | 12 | 1 |
| June | 10 | 4 |
| July | 8 | 6 |
| August | 14 | 7 |
| September | 17 | 5 |
| October | 12 | 1 |
| November | 11 | 0 |
| December | 4 | 1 |
Water Temperatures Data
↑ See chart| Month | Lake Avg High |
|---|---|
| January | 32°F 0°C |
| February | 32°F 0°C |
| March | 36°F 2°C |
| April | 46°F 8°C |
| May | 56°F 13°C |
| June | 69°F 21°C |
| July | 77°F 25°C |
| August | 72°F 22°C |
| September | 65°F 18°C |
| October | 58°F 14°C |
| November | 42°F 5°C |
| December | 32°F 0°C |