Best year time to visit Island County

General weather information about Island County

Average annual temperature is 10.6 °C

Absolute maximum temperature: 28.5 °C

Absolute minimum temperature: -2.4 °C

Number of sunny days: 180 days

Number of rainy days: 184 days

Number of snow days: 1 day

Look at detailed online map of Island County

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

Island County air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)10.89.714.119.523.420.927.628.523.622.616.213.9
Average daytime temperature (°C)7.96.88.59.814.816.221.822.818.614.810.09.4
Average temperature (°C)6.55.36.37.812.213.116.718.014.711.37.57.4
Average night temperature (°C)5.54.24.86.610.511.213.114.412.29.15.56.0
Absolute minimum temperature (°C)0.7-2.42.53.78.59.511.812.08.40.91.21.5

Island County monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.010.012.014.015.016.016.015.013.011.09.08.0
Daylight mean duration (h)8.910.211.913.715.216.015.614.312.610.89.38.4
Daylight minimum duration (h)8.09.011.012.014.015.015.013.011.010.08.08.0
Sunshine mean duration (h)3.64.27.46.611.211.813.311.58.76.45.42.8
Precipitation (mm)91738083181815175264107145
Sunny days761182122252119161410
Rainy days2421202210861011151621
Snow days010000000000

Island County - weather forecast by months

Island County weather in januaryIsland County weather in februaryIsland County weather in marchIsland County weather in aprilIsland County weather in mayIsland County weather in juneIsland County weather in julyIsland County weather in augustIsland County weather in septemberIsland County weather in octoberIsland County weather in novemberIsland County weather in december

Best time to visit Island County:

The best time to visit Island County during the most sunny months:

  • May — 11.2(h)
  • June — 11.8(h)
  • July — 13.3(h)
  • August — 11.5(h)

Months with the longest average daylight duration in Island County:

  • June — 16.0(h)
  • July — 15.6(h)

The largest precipitation sum in Island County is at

  • January — 91(mm)
  • April — 83(mm)
  • November — 107(mm)
  • December — 145(mm)

    • Weather forecast in the closest to Island County admin centers

    Weather forecast in the closest towns to Island County

    Explore Island County

    See also
    MapTrains schedule
    Plan your trip
    AccommodationExperiencesBlog

    Frequently asked questions

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