Stephenson County, Illinois, United States

Last updated: 11:19 AM CDT  ·  Refresh
16°C
Feels like 14°
Overcast
▲ 19°  /  ▼ 13°
Wind
13 mph NE
Humidity
94%
Dew Point
15°
Pressure
29.13 inHg
Visibility
7 mi
UV Index
2.6
Cloud Cover
95%
Sunrise
6:44 AM
Sunset
6:59 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Stephenson County is currently overcast at 16°C. Precipitation is likely — peak probability 73% around 2 PM. Sunrise: 6:44AM · Sunset: 6:59PM.

Alerts

No active alerts for this location.
24 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
16°
65%
12 PM
15°
62%
1 PM
16°
73%
2 PM
16°
73%
3 PM
16°
61%
4 PM
16°
45%
5 PM
17°
44%
6 PM
17°
21%
7 PM
16°
19%
8 PM
16°
27%
9 PM
16°
16%
10 PM
15°
27%
11 PM
15°
27%
12 AM
15°
39%
1 AM
15°
27%
2 AM
15°
19%
3 AM
15°
20%
4 AM
15°
30%
5 AM
14°
34%
6 AM
14°
34%
7 AM
14°
35%
8 AM
14°
35%
9 AM
13°
36%
10 AM
13°
29%
7-Day Forecast
Today
19° 13°
Overcast with a 73% chance of rain.
Mon
15° 11°
Overcast with a 36% chance of rain.
Tue
16° 8°
Partly Cloudy with a 28% chance of rain.
Wed
17° 7°
Partly Cloudy.
Thu
18° 9°
Clear.
Fri
18° 11°
Clear.
Sat
18° 10°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 16° Overcast 65% 13 mph NE 94%
12 PM 15° Overcast 62% 13 mph NE 92%
1 PM 16° Overcast 73% 13 mph NE 91%
2 PM 16° Overcast 73% 13 mph NE 91%
3 PM 16° Overcast 61% 13 mph NE 91%
4 PM 16° Overcast 45% 14 mph NE 90%
5 PM 17° Overcast 44% 14 mph NE 89%
6 PM 17° Mostly Cloudy 21% 13 mph NE 87%
7 PM 16° Mostly Cloudy 19% 14 mph NE 85%
8 PM 16° Mostly Cloudy 27% 14 mph NE 85%
9 PM 16° Overcast 16% 14 mph NE 85%
10 PM 15° Overcast 27% 14 mph NE 86%
11 PM 15° Overcast 27% 14 mph NE 86%
12 AM 15° Overcast 39% 14 mph NE 86%
1 AM 15° Overcast 27% 13 mph NE 86%
2 AM 15° Overcast 19% 13 mph NE 85%
3 AM 15° Overcast 20% 13 mph ENE 83%
4 AM 15° Overcast 30% 13 mph ENE 82%
5 AM 14° Overcast 34% 13 mph ENE 82%
6 AM 14° Overcast 34% 13 mph ENE 83%
7 AM 14° Overcast 35% 13 mph ENE 83%
8 AM 14° Overcast 35% 13 mph ENE 84%
9 AM 13° Overcast 36% 13 mph ENE 84%
10 AM 13° Overcast 29% 13 mph ENE 84%
15-Day Forecast
Today
9/20
Overcast
73%
13°
19°
Mon
9/21
Overcast
36%
11°
15°
Tue
9/22
Partly Cloudy
28%
8°
16°
Wed
9/23
Partly Cloudy
3%
7°
17°
Thu
9/24
Clear
3%
9°
18°
Fri
9/25
Clear
8%
11°
18°
Sat
9/26
Clear
17%
10°
18°
Sun
9/27
Drizzle
43%
12°
19°
Mon
9/28
Clear
44%
11°
20°
Tue
9/29
Drizzle
51%
12°
18°
Wed
9/30
Drizzle
60%
12°
19°
Thu
10/1
Drizzle
60%
11°
18°
Fri
10/2
Drizzle
60%
10°
18°
Sat
10/3
Drizzle
60%
9°
17°
Sun
10/4
Drizzle
60%
8°
16°
24
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

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

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
18 AQI 3.3 µg/m³
O3
Ground-level ozone
Dominant
24 AQI 27 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 24 Good 24 18
Tue 21 Good 21 4
Wed 28 Good 28 7
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 Sun Sep 20, 15:00'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
SBCAPE6 J/kg
MLCAPE12 J/kg
MUCAPE27 J/kg
SBCIN-1 J/kg
MLCIN0 J/kg
Lifted Index7.0
Kinematics
0–6 km Shear17 kt
0–1 km Shear14 kt
Eff. Shear—
0–1 km SRH-18
0–3 km SRH125
Eff. SRH—
Storm Motion359° @ 22 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index29.7
Thermo & Levels
PWAT1.70 in
0–3 km LR4.0 °C/km
700–500 LR5.0 °C/km
Total Totals39.9
LCL970 hPa
LFC965 hPa
EL902 hPa
Freezing Lvl12,815 ft