TODAY MAR31
TEMPERATURE41
HUMIDITY82
PRESSURE29.99
WIND COND.40 12.8
  • 4536Tue
  • 4739Wed
  • 4942Thu
  • 5438Fri
  • 5239Sat
daynightWeather update from Islip, Long Island Mac Arthur Airport at
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Stony Brook Average Temperature

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
January24°F41°F32°F4.0"
February24°F43°F33°F3.0"
March31°F50°F40°F4.2"
April41°F61°F50°F3.5"
May51°F71°F60°F3.6"
June60°F79°F69°F4.7"
July68°F85°F76°F3.1"
August65°F83°F74°F5.6"
September60°F78°F68°F3.1"
October49°F67°F58°F4.1"
November37°F56°F46°F3.0"
December31°F47°F39°F4.9"

Did you know?

  • The highest monthly average temperature in Stony Brook for July is 76 degrees.
  • The lowest monthly average temperature in Stony Brook for January is 32 degrees.
  • The most monthly precipitation in Stony Brook occurs in August with 5.6 inches.
  • The air quality index in Stony Brook is 5% better than the national average.
  • The pollution index in Stony Brook is 674% worse than the national average.

Compare Stony Brook, NY Weather To Other Cities

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      Stony Brook 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.
      IndexStony BrookNew YorkNational
      Air quality index474350
      Pollution index39,208,8009,373,0575,066,862

      Stony Brook 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

      Stony Brook air quality information

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

      Average monthly Stony Brook temperature with heat index

      Stony Brook monthly precipitation with daily maximum

      Stony Brook monthly snow depth with daily maximum

      Stony Brook monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Yaphank, NY6,380476%
      Belle Terre, NY725476%
      Brentwood, NY61,438476%
      Centerport, NY5,251476%
      Deer Park, NY27,223476%
      Stony Brook, NY13,437476%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Brainerd, MN13,4402942%
      Hot Springs Village, AR13,4433628%
      Druid Hills, GA13,444524%
      Greenwich, CT13,429476%
      Piney Green, NC13,4273138%
      Stony Brook, NY13,437476%
      Source: The Stony Brook, 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.