Winnebago County, Illinois, United States

Last updated: 11:05 PM CDT  ·  Refresh
25°C
Feels like 28°
Mostly Clear
▲ 34°  /  ▼ 19°
Wind
6 mph NNW
Humidity
84%
Dew Point
22°
Pressure
28.83 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
17%
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 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1440 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
25°
4%
12 AM
24°
21%
1 AM
23°
3%
2 AM
23°
3%
3 AM
23°
3%
4 AM
22°
3%
5 AM
20°
3%
6 AM
19°
6%
7 AM
19°
6%
8 AM
20°
6%
9 AM
21°
6%
10 AM
22°
7%
11 AM
23°
7%
12 PM
25°
7%
1 PM
28°
7%
2 PM
28°
7%
3 PM
28°
7%
4 PM
28°
7%
5 PM
29°
7%
6 PM
29°
3%
7 PM
28°
3%
8 PM
27°
3%
9 PM
23°
3%
10 PM
21°
3%
7-Day Forecast
Tonight
34° 19°
Mostly Clear.
Tue
29° 17°
Partly Cloudy.
Wed
29° 16°
Clear.
Thu
33° 18°
Partly Cloudy with a 28% chance of rain.
Fri
28° 18°
Rain, 90% chance.
Sat
32° 17°
Rain, 69% chance.
Sun
31° 15°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 25° Mostly Clear 4% 6 mph NNW 84%
12 AM 24° Mostly Clear 21% 6 mph NNW 83%
1 AM 23° Clear 3% 7 mph NNW 85%
2 AM 23° Mostly Clear 3% 9 mph N 89%
3 AM 23° Partly Cloudy 3% 10 mph NNE 92%
4 AM 22° Mostly Cloudy 3% 11 mph NNE 94%
5 AM 20° Mostly Cloudy 3% 10 mph NNE 92%
6 AM 19° Overcast 6% 10 mph NNE 92%
7 AM 19° Overcast 6% 9 mph NNE 91%
8 AM 20° Overcast 6% 10 mph NNE 86%
9 AM 21° Mostly Cloudy 6% 10 mph NNE 80%
10 AM 22° Partly Cloudy 7% 10 mph NNE 74%
11 AM 23° Partly Cloudy 7% 9 mph NNE 70%
12 PM 25° Partly Cloudy 7% 9 mph NNE 65%
1 PM 28° Partly Cloudy 7% 9 mph NNE 60%
2 PM 28° Partly Cloudy 7% 9 mph NNE 57%
3 PM 28° Partly Cloudy 7% 9 mph NNE 54%
4 PM 28° Partly Cloudy 7% 9 mph NNE 53%
5 PM 29° Partly Cloudy 7% 9 mph NNE 56%
6 PM 29° Partly Cloudy 3% 8 mph NNE 59%
7 PM 28° Mostly Clear 3% 7 mph NE 62%
8 PM 27° Mostly Clear 3% 7 mph NE 62%
9 PM 23° Mostly Clear 3% 6 mph NE 63%
10 PM 21° Clear 3% 6 mph ENE 63%
15-Day Forecast
Today
7/27
Mostly Clear
4%
19°
34°
Tue
7/28
Partly Cloudy
7%
17°
29°
Wed
7/29
Clear
15%
16°
29°
Thu
7/30
Partly Cloudy
28%
18°
33°
Fri
7/31
Rain
90%
18°
28°
Sat
8/1
Rain
69%
17°
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%
17°
30°
Fri
8/7
Drizzle
60%
16°
31°
Sat
8/8
Drizzle
60%
16°
32°
Sun
8/9
Drizzle
60%
17°
32°
Mon
8/10
Drizzle
60%
17°
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, 02:00'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
SBCAPE873 J/kg
MLCAPE594 J/kg
MUCAPE1850 J/kg
SBCIN-474 J/kg
MLCIN0 J/kg
Lifted Index-3.1
Kinematics
0–6 km Shear42 kt
0–1 km Shear19 kt
Eff. Shear42 kt
0–1 km SRH-72
0–3 km SRH-42
Eff. SRH-44
Storm Motion288° @ 28 kt
0–1 km EHI-0.4
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index-3.8
Thermo & Levels
PWAT1.05 in
0–3 km LR3.9 °C/km
700–500 LR7.0 °C/km
Total Totals43.5
LCL934 hPa
LFC600 hPa
EL238 hPa
Freezing Lvl16,089 ft