Hourly Weather Forecast - Port Jefferson, NY

12 AM
37°F
10%
11mph
W
Mostly Cloudy
Humidity
89%
Feels like
30°F
Dew Point
34°F
1 AM
37°F
10%
11mph
W
Mostly Cloudy
Humidity
87%
Feels like
30°F
Dew Point
34°F
2 AM
37°F
0%
12mph
WNW
Partly Cloudy
Humidity
85%
Feels like
30°F
Dew Point
33°F
3 AM
37°F
0%
13mph
WNW
Partly Cloudy
Humidity
83%
Feels like
29°F
Dew Point
33°F
4 AM
37°F
0%
14mph
WNW
Partly Cloudy
Humidity
80%
Feels like
29°F
Dew Point
32°F
5 AM
37°F
0%
14mph
NW
Partly Cloudy
Humidity
79%
Feels like
28°F
Dew Point
31°F
6 AM
37°F
0%
14mph
NW
Partly Cloudy
Humidity
78%
Feels like
28°F
Dew Point
30°F
7 AM
37°F
0%
14mph
NW
Partly Cloudy
Humidity
76%
Feels like
28°F
Dew Point
30°F
7:14 AM
8 AM
37°F
0%
14mph
NW
Partly Cloudy
Humidity
73%
Feels like
28°F
Dew Point
29°F
9 AM
38°F
0%
14mph
NW
Partly Cloudy
Humidity
69%
Feels like
30°F
Dew Point
29°F
10 AM
40°F
0%
14mph
NW
Partly Cloudy
Humidity
66%
Feels like
32°F
Dew Point
29°F
11 AM
41°F
0%
14mph
NW
Partly Cloudy
Humidity
62%
Feels like
33°F
Dew Point
29°F
12 PM
41°F
0%
13mph
NW
Partly Cloudy
Humidity
60%
Feels like
34°F
Dew Point
29°F
1 PM
41°F
0%
12mph
NW
Partly Cloudy
Humidity
59%
Feels like
35°F
Dew Point
28°F
2 PM
41°F
0%
11mph
NNW
Partly Cloudy
Humidity
60%
Feels like
34°F
Dew Point
28°F
3 PM
39°F
0%
9mph
NNW
Mostly Sunny
Humidity
61%
Feels like
33°F
Dew Point
27°F
4 PM
37°F
0%
8mph
NNW
Sunny
Humidity
64%
Feels like
31°F
Dew Point
26°F
4:28 PM
5 PM
35°F
0%
6mph
NNW
Clear
Humidity
68%
Feels like
29°F
Dew Point
25°F
6 PM
33°F
0%
6mph
NNW
Clear
Humidity
69%
Feels like
28°F
Dew Point
24°F
7 PM
33°F
0%
5mph
NNW
Clear
Humidity
70%
Feels like
28°F
Dew Point
24°F
8 PM
33°F
0%
4mph
NNW
Mostly Clear
Humidity
70%
Feels like
28°F
Dew Point
24°F
9 PM
32°F
0%
4mph
NNW
Partly Cloudy
Humidity
70%
Feels like
28°F
Dew Point
24°F
10 PM
32°F
0%
4mph
NNW
Mostly Cloudy
Humidity
71%
Feels like
28°F
Dew Point
24°F
11 PM
32°F
0%
4mph
NW
Mostly Cloudy
Humidity
71%
Feels like
28°F
Dew Point
24°F

Rain And Snow Totals Through Monday

Atmospheric River Takes Aim For Northern California

The plume of abundant moisture impacting the Northwest the last several days will focus more on Northern California later today into Monday bringing heavy rainfall and mountain snow.

NOAA, NCDC

White Christmas? What Are The Odds

Weekend Weather Outlook

Weekend Weather Outlook

Cold weather

During Extreme Cold: Watch for Frostbite!

Flu Update Valid For Week Ending December 13, 2025

Weekly Flu Update: Flu Spreading Hard Across U.S.

Watch vs. Warning

Flash Flood Watch and Warning Defined

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