Winnebago County, Illinois, United States

Last updated: 9:30 PM CDT  ·  Refresh
27°C
Feels like 30°
Mostly Clear
▲ 34°  /  ▼ 20°
Wind
8 mph W
Humidity
76%
Dew Point
23°
Pressure
28.81 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
12%
Sunrise
5:44 AM
Sunset
8:21 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Winnebago County is currently mostly clear at 27°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1940 J/kg) — isolated convective development possible. Sunrise: 5:44AM · Sunset: 8:21PM.

Alerts

No active alerts for this location.
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
27°
13%
10 PM
25°
23%
11 PM
24°
22%
12 AM
24°
16%
1 AM
24°
5%
2 AM
23°
13%
3 AM
23°
15%
4 AM
22°
15%
5 AM
20°
3%
6 AM
20°
3%
7 AM
20°
3%
8 AM
21°
3%
9 AM
22°
3%
10 AM
23°
3%
11 AM
24°
3%
12 PM
26°
3%
1 PM
28°
3%
2 PM
28°
3%
3 PM
28°
3%
4 PM
29°
3%
5 PM
29°
3%
6 PM
29°
3%
7 PM
28°
3%
8 PM
26°
3%
7-Day Forecast
Tonight
34° 20°
Mostly Clear.
Tue
29° 17°
Partly Cloudy.
Wed
29° 16°
Clear with a 23% chance of rain.
Thu
33° 19°
Overcast.
Fri
28° 18°
Rain, 90% chance.
Sat
32° 16°
Drizzle, 82% chance.
Sun
31° 15°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 27° Mostly Clear 13% 8 mph W 76%
10 PM 25° Clear 23% 6 mph W 80%
11 PM 24° Clear 22% 7 mph NW 79%
12 AM 24° Clear 16% 9 mph NNW 81%
1 AM 24° Clear 5% 10 mph NNW 86%
2 AM 23° Mostly Clear 13% 10 mph N 90%
3 AM 23° Partly Cloudy 15% 11 mph NNE 93%
4 AM 22° Mostly Cloudy 15% 11 mph NNE 93%
5 AM 20° Overcast 3% 10 mph NNE 91%
6 AM 20° Mostly Cloudy 3% 10 mph NNE 91%
7 AM 20° Mostly Cloudy 3% 10 mph NNE 87%
8 AM 21° Mostly Cloudy 3% 11 mph NNE 80%
9 AM 22° Partly Cloudy 3% 11 mph NNE 73%
10 AM 23° Partly Cloudy 3% 11 mph NNE 67%
11 AM 24° Mostly Clear 3% 10 mph NNE 62%
12 PM 26° Mostly Clear 3% 10 mph NNE 58%
1 PM 28° Mostly Clear 3% 10 mph NNE 55%
2 PM 28° Mostly Clear 3% 10 mph NNE 54%
3 PM 28° Clear 3% 10 mph NNE 52%
4 PM 29° Clear 3% 10 mph NNE 53%
5 PM 29° Clear 3% 9 mph NNE 56%
6 PM 29° Clear 3% 8 mph NNE 60%
7 PM 28° Clear 3% 7 mph NNE 62%
8 PM 26° Mostly Clear 3% 7 mph NE 62%
15-Day Forecast
Today
7/27
Mostly Clear
13%
20°
34°
Tue
7/28
Partly Cloudy
16%
17°
29°
Wed
7/29
Clear
23%
16°
29°
Thu
7/30
Overcast
14%
19°
33°
Fri
7/31
Rain
90%
18°
28°
Sat
8/1
Drizzle
82%
16°
32°
Sun
8/2
Clear
17%
15°
31°
Mon
8/3
Clear
17%
14°
32°
Tue
8/4
Drizzle
44%
17°
33°
Wed
8/5
Rain
68%
18°
33°
Thu
8/6
Rain
64%
16°
30°
Fri
8/7
Drizzle
60%
16°
31°
Sat
8/8
Drizzle
60%
17°
32°
Sun
8/9
Drizzle
60%
17°
32°
Mon
8/10
Drizzle
60%
18°
32°
52
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
52 AQI 9.7 µg/m³
O3
Ground-level ozone
41 AQI 44 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 52 Moderate 41 52
Wed 51 Moderate 35 51
Thu 57 Moderate 38 57
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Tue Jul 28, 01:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 90 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1427 J/kg
MLCAPE1691 J/kg
MUCAPE2648 J/kg
SBCIN-299 J/kg
MLCIN0 J/kg
Lifted Index-4.9
Kinematics
0–6 km Shear41 kt
0–1 km Shear18 kt
Eff. Shear38 kt
0–1 km SRH-56
0–3 km SRH-50
Eff. SRH-48
Storm Motion289° @ 32 kt
0–1 km EHI-0.5
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index7.1
Thermo & Levels
PWAT1.39 in
0–3 km LR4.7 °C/km
700–500 LR7.1 °C/km
Total Totals47.6
LCL911 hPa
LFC616 hPa
EL204 hPa
Freezing Lvl16,037 ft