Hourly Weather Forecast - Port Jefferson, NY

12 AM
24°F
10%
8mph
WSW
Cloudy
Humidity
66%
Feels like
16°F
Dew Point
15°F
1 AM
24°F
10%
9mph
WSW
Cloudy
Humidity
66%
Feels like
15°F
Dew Point
15°F
2 AM
24°F
10%
9mph
WSW
Cloudy
Humidity
67%
Feels like
14°F
Dew Point
15°F
3 AM
24°F
10%
9mph
W
Cloudy
Humidity
68%
Feels like
14°F
Dew Point
15°F
4 AM
23°F
10%
9mph
W
Mostly Cloudy
Humidity
69%
Feels like
13°F
Dew Point
15°F
5 AM
23°F
10%
9mph
W
Partly Cloudy
Humidity
69%
Feels like
13°F
Dew Point
15°F

Snow and ice forecast through Friday A.M.

Multiple Snow Threats Across the Northern U.S.

Multiple systems will bring snow across the Northern U.S. through the end of the week.

Rainfall Forecast for Northwest through Friday A.M.

Unrelenting Rains Soak the Northwest

Today's Weather Outlook

Today's Weather Outlook

Weekly Drought Map for December 4, 2025

Active Week of Weather Leads to Mixed Drought Results

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

Cold Air Damming - Cause And Effects

People skating on a frozen pond on a clear day. (Image by Q K from Pixabay)

Safety Tips For Icy Surfaces

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide