TODAY JUN20
TEMPERATURE79
HUMIDITY54
PRESSURE29.83
WIND COND.210 10.3
  • 7661Thu50%
  • 7361Fri
  • 7466Sat50%60%
  • 8265Sun30%
  • 7860Mon30%
daynightWeather update from Islip, Long Island Mac Arthur Airport at

Islip Terrace Average Weather

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January3°F71°F34°F3.3"
February9°F68°F33°F2.1"
March10°F76°F39°F2.6"
April27°F87°F50°F4.9"
May34°F88°F58°F2.7"
June46°F96°F69°F4.0"
July55°F95°F74°F4.1"
August54°F97°F74°F2.9"
September43°F92°F67°F3.1"
October33°F88°F56°F6.5"
November22°F70°F48°F3.2"
December13°F64°F38°F4.2"

Did you know?

  • The highest monthly average temperature in Islip Terrace for July is 74 degrees.
  • The lowest monthly average temperature in Islip Terrace for February is 33 degrees.
  • The most monthly precipitation in Islip Terrace occurs in October with 6.5 inches.
  • The air quality index in Islip Terrace is 5% better than the national average.
  • The pollution index in Islip Terrace is 673% worse than the national average.

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Compare Islip Terrace, NY Weather To Other Cities

Islip Terrace air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
IndexIslip TerraceNew YorkNational
Air quality index474350
Pollution index39,208,8009,373,0575,066,862

Islip Terrace air quality information

MeasurementTotal
Days measured365
Days with good air quality200
Days with moderate air quality146
Days w/ poor A.Q. for sensitive groups18
Days with unhealthy air quality1

Islip Terrace air quality information

PollutantTotal
Arsenic0.060%
Benzene0.320%
Carbon Tetrachloride0.020%
Lead0.320%
Mercury0.130%

Average monthly Islip Terrace temperature with heat index

Islip Terrace monthly precipitation with daily maximum

Islip Terrace monthly snow depth with daily maximum

Islip Terrace monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Bay Shore, NY29,704476%
Blue Point, NY4,581476%
Brookhaven, NY3,605476%
Cold Spring Harbor, NY5,055476%
Deer Park, NY27,223476%
Islip Terrace, NY5,302476%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Pass Christian, MS5,3023824%
Paxtonia, PA5,301524%
East Port Orchard, WA5,3011766%
Schlusser, PA5,303524%
Brookhaven, WV5,3003040%
Islip Terrace, NY5,302476%
Source: The Islip Terrace, NY weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.