Port Jefferson, NY weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Port Jefferson now
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Port Jefferson weather by the hour
Port Jefferson weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Port Jefferson.
This week in Port Jefferson
Sunrise, sunset and moon in Port Jefferson
What is the weather usually like in Port Jefferson?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 83°F average high
- Januarycoldest month · 26°F average low
- 48.5 inprecipitation per year · 1,232 mm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Port Jefferson: May–June and August–September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station MT SINAI, NY US (USC00305606), adjusted for the elevation of Port Jefferson.
Port Jefferson weather month by month
Sunrise and sunset in Port Jefferson through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:12 AM | 4:50 PM | 9 h 37 min |
| February | 6:44 AM | 5:28 PM | 10 h 43 min |
| March | 7:01 AM | 7:00 PM | 11 h 58 min |
| April | 6:11 AM | 7:33 PM | 13 h 21 min |
| May | 5:32 AM | 8:04 PM | 14 h 31 min |
| June | 5:18 AM | 8:27 PM | 15 h 9 min |
| July | 5:31 AM | 8:24 PM | 14 h 52 min |
| August | 6:00 AM | 7:52 PM | 13 h 51 min |
| September | 6:31 AM | 7:03 PM | 12 h 31 min |
| October | 7:02 AM | 6:13 PM | 11 h 10 min |
| November | 6:38 AM | 4:35 PM | 9 h 56 min |
| December | 7:08 AM | 4:26 PM | 9 h 18 min |
Times for the 15th of each month, local time (America/New York).
What is the weather like in Port Jefferson?
Port Jefferson has a humid subtropical climate. The warmest month is July, with an average high of 83°F (29°C), and the coldest is January, with average lows of 26°F (-3°C).
It gets about 48.5 inches (1,232 mm) of precipitation a year. The wettest month is March and the driest is February.
The best time to visit Port Jefferson is May–June and August–September. At 13 ft of elevation, nights are mild most of the year. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about Port Jefferson
Weather in towns near Port Jefferson
Questions about the weather in Port Jefferson
What is the hottest month in Port Jefferson?
July, with an average high of 83°F (29°C).
What is the coldest month in Port Jefferson?
January, with an average low of 26°F (-3°C).
How much does it rain in Port Jefferson?
About 48.5 inches (1,232 mm) a year; the wettest month is March.
Does it snow in Port Jefferson?
Snow is very rare or not recorded at the nearest weather station.
When is the best time to visit Port Jefferson?
May–June and August–September, when temperatures are most pleasant and rainy days are fewer.
What climate does Port Jefferson have?
Humid subtropical (Köppen Cfa).
What is the weather like in Port Jefferson in November?
Highs average 56°F and lows 40°F, with about 3.7 inches of precipitation.
What time is sunrise in Port Jefferson?
Around 6:38 AM in mid-November, and sunset around 4:35 PM. Today’s exact times are shown above.
Where does this Port Jefferson weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Port Jefferson.
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