Heat Advisory — Sauk, WI, Columbia, WI, Iowa, WI, Dane, WI, Lafayette, WI, Green, WI, Rock, WI, Fond Du Lac, WI, Sheboygan, WI, Washington, WI, Ozaukee, WI, Waukesha, WI, Milwaukee, WI, Racine, WI, Kenosha, WI, Marquette, WI, Green Lake, WI, Dodge, WI, Jefferson, WI, Walworth, WI 9:00 PM Extreme Heat Warning — Sauk, WI, Columbia, WI, Iowa, WI, Dane, WI, Lafayette, WI, Green, WI, Rock, WI 9:00 PM

Sauk County, Wisconsin, United States

Last updated: 6:01 PM CDT  ·  Refresh
33°C
Feels like 40°
Clear
▲ 36°  /  ▼ 19°
Wind
13 mph WNW
Humidity
59%
Dew Point
21°
Pressure
28.52 inHg
Visibility
10 mi
UV Index
5.3
Cloud Cover
5%
Sunrise
5:44 AM
Sunset
8:27 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Sauk County is currently clear at 33°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2172 J/kg) — isolated convective development possible. Sunrise: 5:44AM · Sunset: 8:27PM.

Alerts

Heat Advisory
Sauk, WI, Columbia, WI, Iowa, WI, Dane, WI, Lafayette, WI, Green, WI, Rock, WI, Fond Du Lac, WI, Sheboygan, WI, Washington, WI, Ozaukee, WI, Waukesha, WI, Milwaukee, WI, Racine, WI, Kenosha, WI, Marquette, WI, Green Lake, WI, Dodge, WI, Jefferson, WI, Walworth, WI
Expires 9:00 PM
Extreme Heat Warning
Sauk, WI, Columbia, WI, Iowa, WI, Dane, WI, Lafayette, WI, Green, WI, Rock, WI
Expires 9:00 PM
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
33°
4%
7 PM
32°
19%
8 PM
31°
20%
9 PM
28°
20%
10 PM
27°
20%
11 PM
25°
20%
12 AM
24°
14%
1 AM
23°
3%
2 AM
23°
3%
3 AM
22°
3%
4 AM
22°
3%
5 AM
19°
3%
6 AM
19°
3%
7 AM
19°
3%
8 AM
20°
3%
9 AM
21°
3%
10 AM
22°
3%
11 AM
23°
3%
12 PM
24°
3%
1 PM
29°
3%
2 PM
29°
3%
3 PM
29°
3%
4 PM
29°
3%
5 PM
31°
3%
7-Day Forecast
Tonight
36° 19°
Clear with a 20% chance of rain.
Tue
31° 19°
Mostly Clear.
Wed
32° 17°
Clear with a 23% chance of rain.
Thu
36° 19°
Partly Cloudy with a 55% chance of rain.
Fri
32° 18°
Rain, 86% chance.
Sat
34° 17°
Drizzle, 68% chance.
Sun
34° 16°
Partly Cloudy with a 21% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 33° Clear 4% 13 mph WNW 59%
7 PM 32° Clear 19% 11 mph WNW 63%
8 PM 31° Clear 20% 8 mph NW 65%
9 PM 28° Clear 20% 8 mph NNW 68%
10 PM 27° Clear 20% 10 mph N 72%
11 PM 25° Clear 20% 10 mph N 78%
12 AM 24° Mostly Clear 14% 10 mph N 82%
1 AM 23° Partly Cloudy 3% 9 mph NNE 87%
2 AM 23° Mostly Clear 3% 9 mph NNE 89%
3 AM 22° Mostly Clear 3% 8 mph NNE 89%
4 AM 22° Partly Cloudy 3% 8 mph NNE 90%
5 AM 19° Partly Cloudy 3% 8 mph NNE 89%
6 AM 19° Partly Cloudy 3% 8 mph NNE 88%
7 AM 19° Partly Cloudy 3% 8 mph NNE 85%
8 AM 20° Partly Cloudy 3% 8 mph NNE 78%
9 AM 21° Mostly Clear 3% 8 mph NNE 71%
10 AM 22° Mostly Clear 3% 8 mph NNE 64%
11 AM 23° Mostly Clear 3% 8 mph NE 57%
12 PM 24° Clear 3% 7 mph NE 50%
1 PM 29° Clear 3% 7 mph NE 45%
2 PM 29° Clear 3% 6 mph NE 44%
3 PM 29° Clear 3% 6 mph NE 43%
4 PM 29° Clear 3% 6 mph ENE 42%
5 PM 31° Clear 3% 5 mph ENE 47%
15-Day Forecast
Today
7/27
Clear
20%
19°
36°
Tue
7/28
Mostly Clear
14%
19°
31°
Wed
7/29
Clear
23%
17°
32°
Thu
7/30
Partly Cloudy
55%
19°
36°
Fri
7/31
Rain
86%
18°
32°
Sat
8/1
Drizzle
68%
17°
34°
Sun
8/2
Partly Cloudy
21%
16°
34°
Mon
8/3
Clear
8%
15°
34°
Tue
8/4
Clear
35%
18°
36°
Wed
8/5
Clear
54%
17°
34°
Thu
8/6
Drizzle
67%
15°
34°
Fri
8/7
Drizzle
60%
17°
34°
Sat
8/8
Rain
90%
17°
33°
Sun
8/9
Drizzle
60%
17°
34°
Mon
8/10
Clear
60%
16°
34°
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
44 AQI 49 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 52 Moderate 44 52
Wed 40 Good 32 40
Thu 56 Moderate 36 56
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 Mon Jul 27, 21:00'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
SBCAPE2257 J/kg
MLCAPE892 J/kg
MUCAPE2257 J/kg
SBCIN-103 J/kg
MLCIN0 J/kg
Lifted Index-6.9
Kinematics
0–6 km Shear41 kt
0–1 km Shear9 kt
Eff. Shear42 kt
0–1 km SRH-31
0–3 km SRH-75
Eff. SRH-75
Storm Motion282° @ 35 kt
0–1 km EHI-0.4
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index-4.7
Thermo & Levels
PWAT1.06 in
0–3 km LR6.8 °C/km
700–500 LR7.4 °C/km
Total Totals50.1
LCL812 hPa
LFC670 hPa
EL184 hPa
Freezing Lvl15,476 ft