Hourly Weather Forecast - Port Jefferson, NY

12 AM
38°F
10%
15mph
SW
Mostly Cloudy
Humidity
67%
Feels like
29°F
Dew Point
28°F
1 AM
39°F
10%
15mph
SW
Mostly Cloudy
Humidity
66%
Feels like
30°F
Dew Point
28°F
2 AM
39°F
20%
15mph
SW
Mostly Cloudy
Humidity
65%
Feels like
30°F
Dew Point
28°F
3 AM
39°F
20%
15mph
SW
Mostly Cloudy
Humidity
65%
Feels like
31°F
Dew Point
28°F
4 AM
39°F
20%
15mph
SW
Mostly Cloudy
Humidity
65%
Feels like
31°F
Dew Point
28°F
5 AM
39°F
10%
14mph
SW
Mostly Cloudy
Humidity
65%
Feels like
31°F
Dew Point
28°F
6 AM
39°F
10%
14mph
SW
Mostly Cloudy
Humidity
65%
Feels like
31°F
Dew Point
29°F
7 AM
40°F
10%
13mph
WSW
Mostly Cloudy
Humidity
65%
Feels like
32°F
Dew Point
29°F
7:13 AM
8 AM
40°F
10%
13mph
WSW
Cloudy
Humidity
66%
Feels like
33°F
Dew Point
30°F
9 AM
41°F
10%
14mph
WSW
Cloudy
Humidity
66%
Feels like
34°F
Dew Point
30°F
10 AM
42°F
10%
14mph
WSW
Cloudy
Humidity
66%
Feels like
34°F
Dew Point
31°F
11 AM
42°F
10%
15mph
WSW
Mostly Cloudy
Humidity
64%
Feels like
35°F
Dew Point
31°F
12 PM
43°F
10%
15mph
WSW
Partly Cloudy
Humidity
61%
Feels like
36°F
Dew Point
31°F
1 PM
44°F
10%
15mph
W
Partly Cloudy
Humidity
57%
Feels like
37°F
Dew Point
30°F
2 PM
44°F
10%
15mph
W
Mostly Sunny
Humidity
55%
Feels like
36°F
Dew Point
29°F
3 PM
42°F
10%
14mph
W
Mostly Sunny
Humidity
55%
Feels like
35°F
Dew Point
27°F
4 PM
41°F
10%
14mph
W
Sunny
Humidity
55%
Feels like
33°F
Dew Point
26°F
4:27 PM
5 PM
39°F
10%
14mph
WNW
Clear
Humidity
56%
Feels like
31°F
Dew Point
25°F
6 PM
37°F
10%
14mph
WNW
Clear
Humidity
58%
Feels like
29°F
Dew Point
24°F
7 PM
36°F
10%
14mph
WNW
Clear
Humidity
60%
Feels like
27°F
Dew Point
23°F
8 PM
34°F
10%
14mph
WNW
Clear
Humidity
63%
Feels like
25°F
Dew Point
23°F
9 PM
33°F
10%
13mph
WNW
Clear
Humidity
64%
Feels like
24°F
Dew Point
23°F
10 PM
33°F
10%
12mph
WNW
Clear
Humidity
66%
Feels like
24°F
Dew Point
23°F
11 PM
32°F
10%
11mph
WNW
Clear
Humidity
66%
Feels like
23°F
Dew Point
22°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.

Wednesday's Weather Outlook

Wednesday'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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