Hourly Weather Forecast - Sullivan, WI

12 AM
24°F
0%
7mph
WNW
Mostly Cloudy
Humidity
75%
Feels like
15°F
Dew Point
17°F
1 AM
22°F
0%
7mph
WNW
Mostly Cloudy
Humidity
75%
Feels like
13°F
Dew Point
15°F
2 AM
20°F
0%
7mph
WNW
Partly Cloudy
Humidity
76%
Feels like
11°F
Dew Point
14°F
3 AM
19°F
0%
7mph
WNW
Partly Cloudy
Humidity
76%
Feels like
10°F
Dew Point
12°F
4 AM
18°F
0%
6mph
WNW
Partly Cloudy
Humidity
76%
Feels like
9°F
Dew Point
12°F
5 AM
17°F
10%
6mph
WNW
Mostly Cloudy
Humidity
77%
Feels like
8°F
Dew Point
11°F
6 AM
17°F
10%
6mph
WNW
Mostly Cloudy
Humidity
77%
Feels like
8°F
Dew Point
11°F
7 AM
17°F
10%
6mph
NW
Cloudy
Humidity
77%
Feels like
9°F
Dew Point
11°F
7:22 AM
8 AM
17°F
10%
6mph
NW
Cloudy
Humidity
76%
Feels like
9°F
Dew Point
11°F
9 AM
18°F
10%
6mph
NW
Cloudy
Humidity
75%
Feels like
10°F
Dew Point
11°F
10 AM
19°F
10%
6mph
NW
Cloudy
Humidity
73%
Feels like
11°F
Dew Point
12°F
11 AM
21°F
10%
6mph
NW
Cloudy
Humidity
71%
Feels like
13°F
Dew Point
13°F
12 PM
22°F
10%
6mph
NW
Cloudy
Humidity
69%
Feels like
14°F
Dew Point
14°F
1 PM
23°F
10%
6mph
NW
Mostly Cloudy
Humidity
68%
Feels like
15°F
Dew Point
14°F
2 PM
23°F
30%
6mph
NW
30% Chance Frozen Mix
Humidity
67%
Feels like
16°F
Dew Point
14°F
3 PM
23°F
30%
6mph
NW
30% Chance of Heavy Snow
Humidity
67%
Feels like
16°F
Dew Point
14°F
4 PM
23°F
30%
5mph
NW
30% Chance of Heavy Snow
Humidity
68%
Feels like
16°F
Dew Point
14°F
4:22 PM
5 PM
22°F
30%
5mph
NW
30 % Chance of Heavy Snow
Humidity
71%
Feels like
15°F
Dew Point
14°F
6 PM
21°F
10%
4mph
WNW
Partly Cloudy
Humidity
73%
Feels like
15°F
Dew Point
13°F
7 PM
20°F
10%
3mph
WNW
Clear
Humidity
74%
Feels like
15°F
Dew Point
13°F
8 PM
20°F
10%
3mph
WNW
Clear
Humidity
75%
Feels like
20°F
Dew Point
13°F
9 PM
20°F
10%
2mph
WNW
Clear
Humidity
75%
Feels like
20°F
Dew Point
13°F
10 PM
19°F
10%
2mph
W
Clear
Humidity
76%
Feels like
19°F
Dew Point
13°F
11 PM
19°F
10%
2mph
W
Clear
Humidity
77%
Feels like
19°F
Dew Point
13°F

Rainfall and Snowfall Totals Through Wednesday

Heavy Rain, Snow, and Winds Wallop Northwest

The atmospheric river this week continues to hit the Pacific Northwest with heavy rain, snow, and high winds.

Tuesday's Weather Outlook

Today's Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A person standing in a snowy forest with their back to the camera. They are bundled up in a white hat and a brown jacket. (Image by StockSnap from Pixabay)

Common Cold Weather Illnesses

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide