Hourly Weather Forecast - Port Jefferson, NY

12 AM
32°F
10%
11mph
WNW
Clear
Humidity
63%
Feels like
23°F
Dew Point
21°F
1 AM
31°F
10%
10mph
WNW
Clear
Humidity
63%
Feels like
23°F
Dew Point
20°F
2 AM
31°F
10%
10mph
WNW
Clear
Humidity
63%
Feels like
22°F
Dew Point
20°F
3 AM
31°F
10%
10mph
WNW
Clear
Humidity
63%
Feels like
22°F
Dew Point
19°F
4 AM
30°F
10%
10mph
WNW
Clear
Humidity
62%
Feels like
22°F
Dew Point
19°F
5 AM
29°F
10%
10mph
NW
Clear
Humidity
62%
Feels like
21°F
Dew Point
18°F
6 AM
29°F
10%
9mph
NW
Clear
Humidity
61%
Feels like
21°F
Dew Point
18°F
7 AM
30°F
10%
9mph
NW
Clear
Humidity
59%
Feels like
22°F
Dew Point
18°F
7:13 AM
8 AM
32°F
10%
9mph
NW
Sunny
Humidity
58%
Feels like
24°F
Dew Point
19°F
9 AM
33°F
10%
9mph
NW
Sunny
Humidity
52%
Feels like
26°F
Dew Point
17°F
10 AM
34°F
10%
10mph
NW
Sunny
Humidity
50%
Feels like
27°F
Dew Point
18°F
11 AM
35°F
10%
10mph
NW
Sunny
Humidity
47%
Feels like
28°F
Dew Point
17°F
12 PM
36°F
0%
11mph
NW
Sunny
Humidity
46%
Feels like
29°F
Dew Point
18°F
1 PM
37°F
0%
11mph
NW
Sunny
Humidity
45%
Feels like
29°F
Dew Point
18°F
2 PM
37°F
0%
11mph
NW
Sunny
Humidity
46%
Feels like
29°F
Dew Point
18°F
3 PM
36°F
0%
11mph
NW
Sunny
Humidity
47%
Feels like
28°F
Dew Point
18°F
4 PM
34°F
10%
9mph
NW
Sunny
Humidity
51%
Feels like
27°F
Dew Point
18°F
4:27 PM
5 PM
33°F
10%
10mph
NNW
Clear
Humidity
53%
Feels like
25°F
Dew Point
18°F
6 PM
31°F
10%
10mph
NNW
Clear
Humidity
54%
Feels like
23°F
Dew Point
17°F
7 PM
31°F
20%
10mph
NNW
Clear
Humidity
56%
Feels like
22°F
Dew Point
17°F
8 PM
30°F
20%
10mph
NNW
Clear
Humidity
58%
Feels like
21°F
Dew Point
17°F
9 PM
30°F
20%
10mph
NNW
Clear
Humidity
60%
Feels like
21°F
Dew Point
17°F
10 PM
29°F
20%
9mph
NNW
Clear
Humidity
61%
Feels like
21°F
Dew Point
17°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

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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