Boone County, Illinois, United States

Last updated: 9:29 PM CDT  ·  Refresh
26°C
Feels like 26°
Partly Cloudy
▲ 30°  /  ▼ 19°
Wind
10 mph SSE
Humidity
78%
Dew Point
22°
Pressure
28.78 inHg
Visibility
6 mi
UV Index
0.0
Cloud Cover
31%
Sunrise
5:43 AM
Sunset
8:19 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Boone County is currently partly cloudy at 25°C. Precipitation is likely — peak probability 51% around 9 PM. Atmospheric instability is elevated (CAPE up to 1530 J/kg) — isolated convective development possible. Sunrise: 5:43AM · Sunset: 8:19PM.

Alerts

No active alerts for this location.
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
50%
10 PM
24°
42%
11 PM
24°
23%
12 AM
23°
16%
1 AM
23°
5%
2 AM
23°
6%
3 AM
22°
3%
4 AM
22°
3%
5 AM
19°
3%
6 AM
19°
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
26°
3%
2 PM
27°
3%
3 PM
27°
3%
4 PM
27°
3%
5 PM
27°
3%
6 PM
27°
3%
7 PM
26°
3%
8 PM
24°
3%
7-Day Forecast
Tonight
30° 19°
Partly Cloudy with a 50% chance of rain.
Tue
28° 17°
Partly Cloudy.
Wed
29° 16°
Clear with a 23% chance of rain.
Thu
31° 19°
Fog with a 22% chance of rain.
Fri
27° 18°
Rain, 90% chance.
Sat
31° 16°
Drizzle, 90% chance.
Sun
30° 15°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 26° Partly Cloudy 50% 10 mph SSE 78%
10 PM 24° Clear 42% 6 mph WNW 82%
11 PM 24° Clear 23% 6 mph NW 82%
12 AM 23° Clear 16% 8 mph NNW 83%
1 AM 23° Mostly Clear 5% 9 mph N 86%
2 AM 23° Partly Cloudy 6% 10 mph N 90%
3 AM 22° Partly Cloudy 3% 11 mph NNE 93%
4 AM 22° Mostly Cloudy 3% 11 mph NNE 93%
5 AM 19° Overcast 3% 10 mph N 92%
6 AM 19° Overcast 3% 9 mph N 91%
7 AM 20° Overcast 3% 10 mph N 88%
8 AM 21° Mostly Cloudy 3% 10 mph NNE 81%
9 AM 22° Mostly Cloudy 3% 11 mph NNE 75%
10 AM 23° Partly Cloudy 3% 11 mph NNE 69%
11 AM 24° Mostly Clear 3% 10 mph NNE 64%
12 PM 26° Mostly Clear 3% 10 mph NNE 60%
1 PM 26° Clear 3% 10 mph NNE 57%
2 PM 27° Clear 3% 10 mph NNE 55%
3 PM 27° Clear 3% 10 mph NNE 54%
4 PM 27° Clear 3% 10 mph NNE 54%
5 PM 27° Clear 3% 9 mph NNE 57%
6 PM 27° Clear 3% 9 mph NE 60%
7 PM 26° Clear 3% 8 mph NE 62%
8 PM 24° Mostly Clear 3% 8 mph NE 63%
15-Day Forecast
Today
7/27
Partly Cloudy
50%
19°
30°
Tue
7/28
Partly Cloudy
16%
17°
28°
Wed
7/29
Clear
23%
16°
29°
Thu
7/30
Fog
22%
19°
31°
Fri
7/31
Rain
90%
18°
27°
Sat
8/1
Drizzle
90%
16°
31°
Sun
8/2
Clear
8%
15°
30°
Mon
8/3
Clear
17%
15°
31°
Tue
8/4
Drizzle
44%
17°
32°
Wed
8/5
Rain
68%
18°
32°
Thu
8/6
Rain
64%
17°
29°
Fri
8/7
Drizzle
60%
16°
29°
Sat
8/8
Drizzle
60%
17°
31°
Sun
8/9
Drizzle
60%
18°
30°
Mon
8/10
Drizzle
60%
18°
31°
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 9.4 µg/m³
O3
Ground-level ozone
41 AQI 45 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 52 Moderate 41 52
Wed 40 Good 32 40
Thu 52 Moderate 40 52
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
SBCAPE875 J/kg
MLCAPE2509 J/kg
MUCAPE3803 J/kg
SBCIN-388 J/kg
MLCIN0 J/kg
Lifted Index-3.3
Kinematics
0–6 km Shear48 kt
0–1 km Shear23 kt
Eff. Shear50 kt
0–1 km SRH-21
0–3 km SRH-29
Eff. SRH-68
Storm Motion286° @ 32 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index21.0
Thermo & Levels
PWAT1.65 in
0–3 km LR4.1 °C/km
700–500 LR6.9 °C/km
Total Totals50.3
LCL930 hPa
LFC586 hPa
EL234 hPa
Freezing Lvl16,033 ft