Union County, Illinois, United States

Last updated: 9:46 PM CDT  ·  Refresh
27°C
Feels like 29°
Clear
▲ 35°  /  ▼ 19°
Wind
8 mph N
Humidity
79%
Dew Point
22°
Pressure
29.25 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
2%
Sunrise
5:52 AM
Sunset
8:13 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Union County is currently clear at 26°C. Dry conditions are expected through the next 24 hours. Sunrise: 5:52AM · Sunset: 8:13PM.

Alerts

No active alerts for this location.
44 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
27°
3%
10 PM
25°
14%
11 PM
24°
7%
12 AM
23°
3%
1 AM
23°
3%
2 AM
22°
3%
3 AM
21°
3%
4 AM
20°
3%
5 AM
19°
3%
6 AM
19°
3%
7 AM
21°
3%
8 AM
22°
3%
9 AM
23°
3%
10 AM
24°
5%
11 AM
26°
5%
12 PM
26°
5%
1 PM
28°
5%
2 PM
28°
5%
3 PM
28°
5%
4 PM
28°
3%
5 PM
27°
3%
6 PM
27°
3%
7 PM
26°
3%
8 PM
26°
3%
7-Day Forecast
Tonight
35° 19°
Clear.
Wed
29° 18°
Mostly Clear.
Thu
27° 16°
Clear.
Fri
23° 17°
Mostly Cloudy with a 44% chance of rain.
Sat
29° 18°
Clear with a 45% chance of rain.
Sun
33° 23°
Clear.
Mon
34° 23°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 27° Clear 3% 8 mph N 79%
10 PM 25° Clear 14% 8 mph N 83%
11 PM 24° Clear 7% 8 mph N 83%
12 AM 23° Clear 3% 8 mph N 83%
1 AM 23° Clear 3% 8 mph N 85%
2 AM 22° Clear 3% 7 mph N 87%
3 AM 21° Clear 3% 6 mph N 89%
4 AM 20° Clear 3% 6 mph N 90%
5 AM 19° Clear 3% 6 mph N 90%
6 AM 19° Clear 3% 7 mph N 89%
7 AM 21° Clear 3% 8 mph N 85%
8 AM 22° Clear 3% 8 mph N 81%
9 AM 23° Clear 3% 7 mph N 77%
10 AM 24° Mostly Clear 5% 8 mph N 73%
11 AM 26° Partly Cloudy 5% 9 mph N 69%
12 PM 26° Partly Cloudy 5% 10 mph N 66%
1 PM 28° Partly Cloudy 5% 10 mph N 64%
2 PM 28° Partly Cloudy 5% 10 mph NNE 62%
3 PM 28° Partly Cloudy 5% 10 mph NNE 61%
4 PM 28° Partly Cloudy 3% 10 mph NNE 63%
5 PM 27° Partly Cloudy 3% 10 mph NNE 66%
6 PM 27° Partly Cloudy 3% 9 mph NNE 68%
7 PM 26° Partly Cloudy 3% 9 mph NNE 70%
8 PM 26° Partly Cloudy 3% 9 mph NNE 72%
15-Day Forecast
Today
7/21
Clear
3%
19°
35°
Wed
7/22
Mostly Clear
5%
18°
29°
Thu
7/23
Clear
3%
16°
27°
Fri
7/24
Mostly Cloudy
44%
17°
23°
Sat
7/25
Clear
45%
18°
29°
Sun
7/26
Clear
17%
23°
33°
Mon
7/27
Clear
17%
23°
34°
Tue
7/28
Rain
28%
19°
32°
Wed
7/29
Drizzle
44%
18°
29°
Thu
7/30
Drizzle
44%
16°
29°
Fri
7/31
Drizzle
60%
17°
29°
Sat
8/1
Drizzle
60%
19°
30°
Sun
8/2
Drizzle
60%
20°
31°
Mon
8/3
Drizzle
60%
20°
31°
Tue
8/4
Drizzle
60%
21°
32°
44
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
44 AQI 7.9 µg/m³
O3
Ground-level ozone
36 AQI 39 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 44 Good 36 44
Thu 31 Good 31 21
Fri 33 Good 33 11
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 Wed Jul 22, 01:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE317 J/kg
MLCAPE24 J/kg
MUCAPE317 J/kg
SBCIN-319 J/kg
MLCIN0 J/kg
Lifted Index0.4
Kinematics
0–6 km Shear40 kt
0–1 km Shear11 kt
Eff. Shear—
0–1 km SRH-91
0–3 km SRH-106
Eff. SRH—
Storm Motion284° @ 29 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index4.0
Thermo & Levels
PWAT1.33 in
0–3 km LR4.5 °C/km
700–500 LR5.4 °C/km
Total Totals37.2
LCL930 hPa
LFC466 hPa
EL201 hPa
Freezing Lvl17,602 ft