Hourly Weather Forecast - Port Jefferson, NY

12 AM
41°F
30%
7mph
SW
30% Chance of Light Rain
Humidity
89%
Feels like
36°F
Dew Point
38°F
1 AM
42°F
30%
8mph
SW
30% Chance of Light Rain
Humidity
89%
Feels like
37°F
Dew Point
39°F
2 AM
42°F
30%
9mph
SW
30% Chance of Rain
Humidity
90%
Feels like
37°F
Dew Point
39°F
3 AM
42°F
30%
9mph
SW
30% Chance of Rain
Humidity
90%
Feels like
37°F
Dew Point
40°F
4 AM
43°F
30%
9mph
SW
30% Chance of Rain
Humidity
91%
Feels like
37°F
Dew Point
40°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

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During Extreme Cold: Watch for Frostbite!

Flu Update Valid For Week Ending December 13, 2025

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Watch vs. Warning

Flash Flood Watch and Warning Defined

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