Mount Vernon, Illinois

Last updated: 4:46 AM CDT  ·  Refresh
12°C
Feels like 10°
Clear
▲ 27°  /  ▼ 11°
Wind
5 mph S
Humidity
74%
Dew Point
8°
Pressure
29.66 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
10%
Sunrise
7:17 AM
Sunset
5:59 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Mount Vernon is currently clear at 12°C. Dry conditions are expected through the next 24 hours. Sunrise: 7:17AM · Sunset: 5:59PM.

Alerts

No active alerts for this location.
51 AQI · Moderate Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
12°
3%
5 AM
9°
21%
6 AM
9°
21%
7 AM
10°
21%
8 AM
13°
21%
9 AM
17°
21%
10 AM
19°
21%
11 AM
21°
21%
12 PM
23°
15%
1 PM
27°
3%
2 PM
27°
3%
3 PM
27°
3%
4 PM
27°
3%
5 PM
24°
3%
6 PM
22°
3%
7 PM
21°
3%
8 PM
20°
3%
9 PM
17°
3%
10 PM
17°
3%
11 PM
14°
3%
12 AM
14°
3%
1 AM
14°
3%
2 AM
14°
3%
3 AM
13°
3%
7-Day Forecast
Today
27° 11°
Clear with a 21% chance of rain.
Fri
26° 11°
Mostly Cloudy.
Sat
24° 11°
Overcast with a 74% chance of rain.
Sun
21° 11°
Rain, 90% chance.
Mon
21° 11°
Rain, 90% chance.
Tue
24° 13°
Rain, 90% chance.
Wed
21° 9°
Rain, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 12° Clear 3% 5 mph S 74%
5 AM 9° Clear 21% 6 mph S 71%
6 AM 9° Clear 21% 6 mph S 72%
7 AM 10° Clear 21% 6 mph S 69%
8 AM 13° Clear 21% 8 mph SSW 60%
9 AM 17° Clear 21% 10 mph SSW 51%
10 AM 19° Clear 21% 10 mph SW 46%
11 AM 21° Clear 21% 10 mph SW 42%
12 PM 23° Clear 15% 10 mph SW 38%
1 PM 27° Clear 3% 10 mph SW 37%
2 PM 27° Clear 3% 9 mph SW 38%
3 PM 27° Clear 3% 8 mph SW 38%
4 PM 27° Clear 3% 7 mph SW 41%
5 PM 24° Clear 3% 6 mph SSW 46%
6 PM 22° Mostly Clear 3% 6 mph SSW 51%
7 PM 21° Mostly Clear 3% 5 mph SSW 54%
8 PM 20° Mostly Clear 3% 5 mph SW 56%
9 PM 17° Mostly Clear 3% 5 mph SW 60%
10 PM 17° Mostly Clear 3% 3 mph WSW 64%
11 PM 14° Partly Cloudy 3% 3 mph W 67%
12 AM 14° Partly Cloudy 3% 4 mph N 70%
1 AM 14° Partly Cloudy 3% 4 mph NNE 74%
2 AM 14° Partly Cloudy 3% 5 mph NE 78%
3 AM 13° Partly Cloudy 3% 6 mph ENE 82%
15-Day Forecast
Today
10/29
Clear
21%
11°
27°
Fri
10/30
Mostly Cloudy
6%
11°
26°
Sat
10/31
Overcast
74%
11°
24°
Sun
11/1
Rain
90%
11°
21°
Mon
11/2
Rain
90%
11°
21°
Tue
11/3
Rain
90%
13°
24°
Wed
11/4
Rain
63%
9°
21°
Thu
11/5
Drizzle
43%
5°
17°
Fri
11/6
Drizzle
44%
2°
18°
Sat
11/7
Clear
12%
4°
19°
Sun
11/8
Drizzle
60%
7°
17°
Mon
11/9
Drizzle
60%
8°
17°
Tue
11/10
Drizzle
60%
7°
17°
Wed
11/11
Clear
25%
7°
17°
Thu
11/12
Clear
25%
6°
16°
51
Moderate
U.S. Air Quality Index · Dominant: O3
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
46 AQI 8.2 µg/m³
O3
Ground-level ozone
Dominant
51 AQI 56 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 51 Moderate 51 46
Fri 47 Good 47 47
Sat 54 Moderate 54 42
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 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Thu Oct 29, 08:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE16 J/kg
MUCAPE0 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index11.3
Kinematics
0–6 km Shear12 kt
0–1 km Shear21 kt
Eff. Shear—
0–1 km SRH138
0–3 km SRH112
Eff. SRH—
Storm Motion297° @ 19 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index25.6
Thermo & Levels
PWAT0.86 in
0–3 km LR2.9 °C/km
700–500 LR6.8 °C/km
Total Totals46.4
LCL950 hPa
LFC—
EL—
Freezing Lvl11,043 ft