Weather forecast March 27, 2023 - P3

Climate and Average Weather Year Round in Port Jefferson New York, United States

In Port Jefferson, the summers are warm and humid; the winters are very cold, snowy, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 24°F to 82°F and is rarely below 10°F or above 89°F.

Based on the tourism score, the best time of year to visit Port Jefferson for warm-weather activities is from mid June to late September.

Average Temperature in Port Jefferson 

The warm season lasts for 3.4 months, from June 4 to September 18, with an average daily high temperature above 73°F. The hottest month of the year in Port Jefferson is July, with an average high of 81°F and low of 67°F.

The cold season lasts for 3.3 months, from December 6 to March 15, with an average daily high temperature below 46°F. The coldest month of the year in Port Jefferson is January, with an average low of 25°F and high of 38°F.

Rainfall 

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Port Jefferson experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Port Jefferson. The month with the most rain in Port Jefferson is April, with an average rainfall of 3.8 inches.

The month with the least rain in Port Jefferson is February, with an average rainfall of 2.3 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Port Jefferson experiences significant seasonal variation in monthly snowfall.

The snowy period of the year lasts for 4.5 months, from November 22 to April 6, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Port Jefferson is February, with an average snowfall of 6.5 inches.

The snowless period of the year lasts for 7.5 months, from April 6 to November 22. The least snow falls around July 29, with an average total accumulation of 0.0 inches.

Weather forecast March 27, 2023

Weather 11377

High temperature : 58°F

Low temperature : 43°F

- Overcast clouds, Wind speed 11.99 mph, wind out of the N. Visibility 7 mi, humidity 35% . Chance of Rain : 0 % .

Today's Air Quality - Weather 11377 : Moderate

- Air Quality Index : CO : 387.19 ; NH3 : 3.42 ; NO : 0.01 ; NO2 : 45.24 ; O3 : 53.64 ; PM10 : 12.19 ; PM2.5 : 8.31 ; SO2 : 4.47

Weather 11378

High temperature : 57°F

Low temperature : 43°F

- Overcast clouds, Wind speed 11.99 mph, wind out of the N. Visibility 7 mi, humidity 37% . Chance of Rain : 0 % .

Today's Air Quality - Weather 11378 : Moderate

- Air Quality Index : CO : 387.19 ; NH3 : 3.42 ; NO : 0.01 ; NO2 : 45.24 ; O3 : 53.64 ; PM10 : 12.19 ; PM2.5 : 8.31 ; SO2 : 4.47

Weather 11379

High temperature : 57°F

Low temperature : 43°F

- Overcast clouds, Wind speed 10.36 mph, wind out of the WSW. Visibility 7 mi, humidity 38% . Chance of Rain : 0 % .

Today's Air Quality - Weather 11379 : Moderate

- Air Quality Index : CO : 387.19 ; NH3 : 3.42 ; NO : 0.01 ; NO2 : 45.24 ; O3 : 53.64 ; PM10 : 12.19 ; PM2.5 : 8.31 ; SO2 : 4.47

Weather 11380

High temperature : 57°F

Low temperature : 43°F

- Overcast clouds, Wind speed 10.36 mph, wind out of the WSW. Visibility 7 mi, humidity 38% . Chance of Rain : 0 % .

Today's Air Quality - Weather 11380 : Moderate

- Air Quality Index : CO : 387.19 ; NH3 : 3.42 ; NO : 0.01 ; NO2 : 45.24 ; O3 : 53.64 ; PM10 : 12.19 ; PM2.5 : 8.31 ; SO2 : 4.47

Weather 33701

High temperature : 73°F

Low temperature : 67°F

- Overcast clouds, Wind speed 0 mph, wind out of the N. Visibility 6 mi, humidity 94% . Chance of Rain : 0 % .

Today's Air Quality - Weather 33701 : Good

- Air Quality Index : CO : 213.62 ; NH3 : 0.59 ; NO : 0 ; NO2 : 6.68 ; O3 : 36.12 ; PM10 : 16.37 ; PM2.5 : 6.99 ; SO2 : 0.73

Weather 11385

High temperature : 57°F

Low temperature : 44°F

- Overcast clouds, Wind speed 10.36 mph, wind out of the WSW. Visibility 7 mi, humidity 37% . Chance of Rain : 0 % .

Today's Air Quality - Weather 11385 : Moderate

- Air Quality Index : CO : 387.19 ; NH3 : 3.42 ; NO : 0.01 ; NO2 : 45.24 ; O3 : 53.64 ; PM10 : 12.19 ; PM2.5 : 8.31 ; SO2 : 4.47

Weather 11386

High temperature : 56°F

Low temperature : 44°F

- Overcast clouds, Wind speed 10.36 mph, wind out of the WSW. Visibility 7 mi, humidity 37% . Chance of Rain : 0 % .

Today's Air Quality - Weather 11386 : Moderate

- Air Quality Index : CO : 387.19 ; NH3 : 3.42 ; NO : 0.01 ; NO2 : 45.24 ; O3 : 53.64 ; PM10 : 12.19 ; PM2.5 : 8.31 ; SO2 : 4.47

Weather 11390

High temperature : 58°F

Low temperature : 43°F

- Overcast clouds, Wind speed 10.36 mph, wind out of the WSW. Visibility 7 mi, humidity 37% . Chance of Rain : 0 % .

Today's Air Quality - Weather 11390 : Moderate

- Air Quality Index : CO : 387.19 ; NH3 : 3.42 ; NO : 0.01 ; NO2 : 45.24 ; O3 : 53.64 ; PM10 : 12.19 ; PM2.5 : 8.31 ; SO2 : 4.47

Weather 11224

High temperature : 60°F

Low temperature : 46°F

- Overcast clouds, Wind speed 9.22 mph, wind out of the SW. Visibility 7 mi, humidity 36% . Chance of Rain : 0 % .

Today's Air Quality - Weather 11224 : Moderate

- Air Quality Index : CO : 310.42 ; NH3 : 2.38 ; NO : 0 ; NO2 : 25.36 ; O3 : 80.82 ; PM10 : 7.77 ; PM2.5 : 4.94 ; SO2 : 4.35

Weather 11411

High temperature : 58°F

Low temperature : 44°F

- Overcast clouds, Wind speed 10.36 mph, wind out of the WSW. Visibility 7 mi, humidity 44% . Chance of Rain : 0 % .

Today's Air Quality - Weather 11411 : Moderate

- Air Quality Index : CO : 500.68 ; NH3 : 5.38 ; NO : 0.07 ; NO2 : 67.86 ; O3 : 34.69 ; PM10 : 18.67 ; PM2.5 : 13.34 ; SO2 : 8.94