Lee County, Illinois, United States

Last updated: 9:33 PM CDT  ·  Refresh
29°C
Feels like 36°
Mostly Clear
▲ 33°  /  ▼ 21°
Wind
9 mph W
Humidity
84%
Dew Point
26°
Pressure
28.82 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
20%
Sunrise
5:46 AM
Sunset
8:20 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Lee County is currently mostly clear at 29°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3925 J/kg) — isolated convective development possible. Sunrise: 5:46AM · Sunset: 8:20PM.

Alerts

No active alerts for this location.
43 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
29°
4%
10 PM
28°
40%
11 PM
27°
21%
12 AM
26°
14%
1 AM
25°
3%
2 AM
24°
5%
3 AM
24°
6%
4 AM
23°
6%
5 AM
21°
6%
6 AM
21°
3%
7 AM
21°
3%
8 AM
21°
3%
9 AM
22°
3%
10 AM
23°
3%
11 AM
24°
3%
12 PM
26°
3%
1 PM
27°
3%
2 PM
28°
3%
3 PM
28°
3%
4 PM
29°
3%
5 PM
29°
3%
6 PM
28°
3%
7 PM
27°
3%
8 PM
26°
3%
7-Day Forecast
Tonight
33° 21°
Mostly Clear.
Tue
29° 17°
Partly Cloudy.
Wed
29° 16°
Clear.
Thu
30° 19°
Partly Cloudy with a 21% chance of rain.
Fri
24° 18°
Rain, 90% chance.
Sat
29° 17°
Rain, 69% chance.
Sun
28° 16°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 29° Mostly Clear 4% 9 mph W 84%
10 PM 28° Mostly Clear 40% 9 mph W 89%
11 PM 27° Mostly Clear 21% 10 mph WNW 84%
12 AM 26° Partly Cloudy 14% 10 mph WNW 80%
1 AM 25° Partly Cloudy 3% 10 mph NW 80%
2 AM 24° Partly Cloudy 5% 10 mph NNW 85%
3 AM 24° Partly Cloudy 6% 11 mph N 92%
4 AM 23° Mostly Cloudy 6% 12 mph NNE 94%
5 AM 21° Mostly Cloudy 6% 11 mph NNE 93%
6 AM 21° Overcast 3% 10 mph NNE 92%
7 AM 21° Overcast 3% 11 mph NNE 90%
8 AM 21° Overcast 3% 11 mph NNE 86%
9 AM 22° Mostly Cloudy 3% 11 mph NNE 83%
10 AM 23° Mostly Cloudy 3% 10 mph NNE 79%
11 AM 24° Partly Cloudy 3% 10 mph NNE 74%
12 PM 26° Partly Cloudy 3% 9 mph N 69%
1 PM 27° Partly Cloudy 3% 9 mph N 65%
2 PM 28° Mostly Clear 3% 8 mph NNE 63%
3 PM 28° Mostly Clear 3% 8 mph NNE 61%
4 PM 29° Clear 3% 8 mph NNE 62%
5 PM 29° Clear 3% 8 mph NNE 65%
6 PM 28° Clear 3% 8 mph NNE 68%
7 PM 27° Clear 3% 7 mph NNE 70%
8 PM 26° Clear 3% 7 mph NNE 68%
15-Day Forecast
Today
7/27
Mostly Clear
4%
21°
33°
Tue
7/28
Partly Cloudy
14%
17°
29°
Wed
7/29
Clear
13%
16°
29°
Thu
7/30
Partly Cloudy
21%
19°
30°
Fri
7/31
Rain
90%
18°
24°
Sat
8/1
Rain
69%
17°
29°
Sun
8/2
Clear
17%
16°
28°
Mon
8/3
Clear
17%
15°
28°
Tue
8/4
Drizzle
44%
18°
30°
Wed
8/5
Rain
90%
19°
31°
Thu
8/6
Drizzle
64%
17°
30°
Fri
8/7
Drizzle
60%
17°
28°
Sat
8/8
Drizzle
60%
17°
28°
Sun
8/9
Drizzle
60%
18°
28°
Mon
8/10
Drizzle
60%
18°
28°
43
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
43 AQI 7.8 µg/m³
O3
Ground-level ozone
36 AQI 40 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 43 Good 36 43
Wed 48 Good 31 48
Thu 43 Good 36 43
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 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE4333 J/kg
MLCAPE4879 J/kg
MUCAPE5321 J/kg
SBCIN-62 J/kg
MLCIN0 J/kg
Lifted Index-9.5
Kinematics
0–6 km Shear38 kt
0–1 km Shear17 kt
Eff. Shear51 kt
0–1 km SRH10
0–3 km SRH-28
Eff. SRH-28
Storm Motion287° @ 36 kt
0–1 km EHI0.3
Composite Parameters
Sig. Tornado0.3
STP (eff)0.0
Supercell0.0
K-Index1.9
Thermo & Levels
PWAT1.61 in
0–3 km LR5.0 °C/km
700–500 LR7.5 °C/km
Total Totals53.0
LCL933 hPa
LFC816 hPa
EL124 hPa
Freezing Lvl15,945 ft