Frost Advisory — Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, Schuyler, IL, Mason, IL, Logan, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL 9:00 AM

Sangamon County, Illinois, United States

Last updated: 8:25 PM CDT  ·  Refresh
11°C
Feels like 6°
Partly Cloudy
▲ 12°  /  ▼ 2°
Wind
12 mph NNW
Humidity
73%
Dew Point
6°
Pressure
29.71 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
54%
Sunrise
7:08 AM
Sunset
6:17 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Sangamon County is currently partly cloudy at 10°C. Dry conditions are expected through the next 24 hours. Sunrise: 7:08AM · Sunset: 6:17PM.

Alerts

Frost Advisory
Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, Schuyler, IL, Mason, IL, Logan, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL
Expires 9:00 AM
29 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
11°
16%
9 PM
10°
6%
10 PM
10°
4%
11 PM
9°
4%
12 AM
8°
4%
1 AM
7°
3%
2 AM
6°
3%
3 AM
6°
3%
4 AM
5°
3%
5 AM
3°
3%
6 AM
2°
3%
7 AM
3°
3%
8 AM
4°
3%
9 AM
7°
3%
10 AM
8°
3%
11 AM
10°
3%
12 PM
11°
3%
1 PM
13°
3%
2 PM
13°
3%
3 PM
16°
3%
4 PM
16°
3%
5 PM
14°
3%
6 PM
13°
3%
7 PM
12°
3%
7-Day Forecast
Tonight
12° 2°
Partly Cloudy.
Sat
16° 2°
Clear.
Sun
19° 3°
Clear.
Mon
24° 4°
Clear.
Tue
27° 8°
Partly Cloudy.
Wed
27° 9°
Mostly Clear.
Thu
29° 10°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 11° Partly Cloudy 16% 12 mph NNW 73%
9 PM 10° Mostly Clear 6% 12 mph N 72%
10 PM 10° Mostly Clear 4% 11 mph N 72%
11 PM 9° Mostly Clear 4% 11 mph N 73%
12 AM 8° Clear 4% 11 mph N 75%
1 AM 7° Clear 3% 10 mph N 76%
2 AM 6° Clear 3% 9 mph N 76%
3 AM 6° Clear 3% 8 mph N 76%
4 AM 5° Clear 3% 8 mph N 77%
5 AM 3° Clear 3% 7 mph N 79%
6 AM 2° Clear 3% 6 mph N 82%
7 AM 3° Clear 3% 6 mph N 80%
8 AM 4° Clear 3% 5 mph N 73%
9 AM 7° Clear 3% 5 mph NNE 65%
10 AM 8° Clear 3% 4 mph NE 59%
11 AM 10° Clear 3% 4 mph NE 54%
12 PM 11° Clear 3% 3 mph NE 49%
1 PM 13° Clear 3% 2 mph ENE 45%
2 PM 13° Clear 3% 2 mph ENE 41%
3 PM 16° Clear 3% 2 mph ENE 39%
4 PM 16° Clear 3% 2 mph ESE 38%
5 PM 14° Clear 3% 2 mph ESE 40%
6 PM 13° Clear 3% 2 mph SE 42%
7 PM 12° Clear 3% 2 mph SE 45%
15-Day Forecast
Today
10/16
Partly Cloudy
16%
2°
12°
Sat
10/17
Clear
3%
2°
16°
Sun
10/18
Clear
3%
3°
19°
Mon
10/19
Clear
3%
4°
24°
Tue
10/20
Partly Cloudy
3%
8°
27°
Wed
10/21
Mostly Clear
9%
9°
27°
Thu
10/22
Clear
9%
10°
29°
Fri
10/23
Clear
3%
11°
29°
Sat
10/24
Overcast
3%
12°
29°
Sun
10/25
Mostly Cloudy
54%
11°
26°
Mon
10/26
Drizzle
60%
9°
23°
Tue
10/27
Drizzle
60%
8°
22°
Wed
10/28
Drizzle
60%
8°
22°
Thu
10/29
Drizzle
60%
9°
23°
Fri
10/30
Drizzle
60%
9°
23°
29
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
29 AQI 5.3 µg/m³
O3
Ground-level ozone
19 AQI 21 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 29 Good 19 29
Sun 28 Good 28 9
Mon 33 Good 27 33
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 Fri Oct 16, 23:00'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
SBCAPE12 J/kg
MLCAPE26 J/kg
MUCAPE63 J/kg
SBCIN-57 J/kg
MLCIN-19 J/kg
Lifted Index10.0
Kinematics
0–6 km Shear58 kt
0–1 km Shear26 kt
Eff. Shear—
0–1 km SRH101
0–3 km SRH96
Eff. SRH—
Storm Motion22° @ 35 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index14.1
Thermo & Levels
PWAT0.58 in
0–3 km LR6.4 °C/km
700–500 LR4.3 °C/km
Total Totals38.5
LCL946 hPa
LFC861 hPa
EL763 hPa
Freezing Lvl4,610 ft