Best year time to visit Nassau County

General weather information about Nassau County

Average annual temperature is 20.8 °C

Absolute maximum temperature: 37.3 °C

Absolute minimum temperature: -0.1 °C

Number of sunny days: 143 days

Number of rainy days: 222 days

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* Weather data for Nassau County United States is based on climate observations for 2026 year

Nassau County air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)27.529.430.830.632.135.537.336.535.228.627.325.6
Average daytime temperature (°C)20.924.324.726.727.931.033.933.430.525.821.518.8
Average temperature (°C)14.317.818.420.722.225.027.627.824.820.816.514.0
Average night temperature (°C)9.413.113.616.117.821.123.524.021.016.912.710.3
Absolute minimum temperature (°C)-0.13.32.39.610.916.921.622.216.99.31.91.1

Nassau County monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.013.014.014.013.012.011.010.010.0
Daylight mean duration (h)10.411.112.012.913.714.113.913.212.411.410.610.2
Daylight minimum duration (h)10.010.011.012.013.013.013.012.011.010.010.010.0
Sunshine mean duration (h)8.38.79.29.410.510.811.311.410.39.46.76.8
Precipitation (mm)4650381121171491531281565850124
Sunny days18211510932410171618
Rainy days13716202227292720141413
Snow days000000000000

Nassau County - weather forecast by months

Nassau County weather in januaryNassau County weather in februaryNassau County weather in marchNassau County weather in aprilNassau County weather in mayNassau County weather in juneNassau County weather in julyNassau County weather in augustNassau County weather in septemberNassau County weather in octoberNassau County weather in novemberNassau County weather in december

Best time to visit Nassau County:

The largest precipitation sum in Nassau County is at

  • June — 149(mm)
  • July — 153(mm)
  • August — 128(mm)
  • September — 156(mm)
  • December — 124(mm)

    • Weather forecast in the closest to Nassau County admin centers

    Weather forecast in the closest towns to Nassau County

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    Frequently asked questions

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