Best year time to visit Town of Islip

General weather information about Town of Islip

Average annual temperature is 12.8 °C

Absolute maximum temperature: 31.6 °C

Absolute minimum temperature: -16.0 °C

Number of sunny days: 174 days

Number of rainy days: 188 days

Number of snow days: 3 days

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* Weather data for Town of Islip United States is based on climate observations for 2026 year

Town of Islip air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)14.918.313.822.424.024.829.528.631.623.918.015.5
Average daytime temperature (°C)8.17.38.814.217.921.727.125.723.218.311.29.0
Average temperature (°C)5.13.75.210.914.418.524.322.720.015.07.56.0
Average night temperature (°C)2.20.11.87.910.715.621.519.917.312.04.13.2
Absolute minimum temperature (°C)-2.2-16.0-2.4-0.15.510.117.316.912.37.8-3.2-3.6

Town of Islip monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.610.711.913.314.515.014.813.812.511.19.99.3
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)4.86.77.48.512.311.711.810.78.18.27.45.6
Precipitation (mm)121501381356010714517823512249193
Sunny days8161613221181314142019
Rainy days22101517919231816171012
Snow days120000000000

Town of Islip - weather forecast by months

Town of Islip weather in januaryTown of Islip weather in februaryTown of Islip weather in marchTown of Islip weather in aprilTown of Islip weather in mayTown of Islip weather in juneTown of Islip weather in julyTown of Islip weather in augustTown of Islip weather in septemberTown of Islip weather in octoberTown of Islip weather in novemberTown of Islip weather in december

Best time to visit Town of Islip:

The best time to visit Town of Islip during the most sunny months:

  • May — 12.3(h)
  • June — 11.7(h)
  • July — 11.8(h)

The largest precipitation sum in Town of Islip is at

  • August — 178(mm)
  • September — 235(mm)
  • December — 193(mm)

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    Frequently asked questions

    When is the best time to visit Town of Islip?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Town of Islip.
    What is the weather like in Town of Islip?
    See average temperature, rainfall and daylight hours for Town of Islip by month in the table above.
    How many sunny days does Town of Islip have?
    The monthly weather statistics above show sunshine and rainfall patterns for Town of Islip throughout the year.