Hourly Weather Forecast - Port Jefferson, NY

12 AM
34°F
0%
6mph
WNW
Clear
Humidity
82%
Feels like
28°F
Dew Point
29°F
1 AM
33°F
0%
5mph
WNW
Clear
Humidity
82%
Feels like
28°F
Dew Point
28°F
2 AM
32°F
0%
4mph
WNW
Clear
Humidity
84%
Feels like
28°F
Dew Point
28°F
3 AM
31°F
0%
3mph
WNW
Clear
Humidity
86%
Feels like
31°F
Dew Point
27°F
4 AM
29°F
0%
3mph
WNW
Clear
Humidity
88%
Feels like
29°F
Dew Point
26°F
5 AM
28°F
0%
2mph
WSW
Clear
Humidity
90%
Feels like
28°F
Dew Point
26°F
6 AM
28°F
0%
3mph
SW
Clear
Humidity
90%
Feels like
28°F
Dew Point
25°F
7 AM
29°F
0%
3mph
SSW
Clear
Humidity
89%
Feels like
29°F
Dew Point
26°F
7:11 AM
8 AM
31°F
0%
3mph
S
Mostly Sunny
Humidity
87%
Feels like
31°F
Dew Point
28°F
9 AM
34°F
0%
3mph
S
Partly Cloudy
Humidity
84%
Feels like
34°F
Dew Point
29°F
10 AM
36°F
0%
3mph
S
Partly Cloudy
Humidity
83%
Feels like
34°F
Dew Point
32°F
11 AM
39°F
0%
4mph
S
Partly Cloudy
Humidity
83%
Feels like
35°F
Dew Point
34°F
12 PM
41°F
0%
6mph
S
Partly Cloudy
Humidity
84%
Feels like
37°F
Dew Point
36°F
1 PM
43°F
0%
7mph
S
Partly Cloudy
Humidity
84%
Feels like
38°F
Dew Point
38°F
2 PM
43°F
0%
7mph
SSE
Partly Cloudy
Humidity
87%
Feels like
39°F
Dew Point
40°F
3 PM
44°F
0%
7mph
SSE
Partly Cloudy
Humidity
90%
Feels like
40°F
Dew Point
41°F
4 PM
44°F
0%
7mph
SSE
Partly Cloudy
Humidity
92%
Feels like
39°F
Dew Point
42°F
4:25 PM
5 PM
44°F
0%
8mph
SSE
Partly Cloudy
Humidity
92%
Feels like
39°F
Dew Point
42°F
6 PM
44°F
10%
9mph
SSE
Partly Cloudy
Humidity
91%
Feels like
39°F
Dew Point
42°F
7 PM
45°F
10%
11mph
SSE
Partly Cloudy
Humidity
91%
Feels like
40°F
Dew Point
43°F
8 PM
46°F
20%
12mph
S
Mostly Cloudy
Humidity
95%
Feels like
41°F
Dew Point
45°F
9 PM
48°F
20%
13mph
S
Partly Cloudy
Humidity
95%
Feels like
42°F
Dew Point
46°F
10 PM
49°F
30%
15mph
S
30% Chance Rain Showers
Humidity
96%
Feels like
44°F
Dew Point
48°F
11 PM
51°F
30%
16mph
S
30% Chance Rain Showers
Humidity
96%
Feels like
51°F
Dew Point
49°F

Rainfall Totals Through Wednesday A.M.

Heavy Rain Returns to Deluge Pacific Northwest

Another atmospheric river will hit the Pacific Northwest with heavy rain and high winds.

Monday'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

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