Best year time to visit Alton Bay

General weather information about Alton Bay

Average annual temperature is 9.4 °C

Absolute maximum temperature: 32.5 °C

Absolute minimum temperature: -28.9 °C

Number of sunny days: 159 days

Number of rainy days: 183 days

Number of snow days: 23 days

Look at detailed online map of Alton Bay

* Weather data for Alton Bay United States is based on climate observations for 2026 year

Alton Bay air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)9.010.710.027.430.732.530.926.531.027.616.513.3
Average daytime temperature (°C)3.02.04.813.419.621.626.423.622.216.97.05.6
Average temperature (°C)-0.4-3.50.77.813.316.822.219.518.012.72.91.7
Average night temperature (°C)-3.5-7.9-2.93.88.113.118.816.114.89.4-0.2-0.9
Absolute minimum temperature (°C)-11.1-28.9-7.6-3.51.78.014.412.89.41.4-5.8-7.9

Alton Bay monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.410.511.913.414.715.415.013.912.511.09.79.0
Daylight minimum duration (h)9.09.011.012.014.015.014.013.011.010.09.08.0
Sunshine mean duration (h)4.16.57.47.711.58.110.09.68.26.86.64.3
Precipitation (mm)1534297961181772561771518460167
Sunny days812151420551216152215
Rainy days14101116112526191416615
Snow days965000000021

Alton Bay - weather forecast by months

Alton Bay weather in januaryAlton Bay weather in februaryAlton Bay weather in marchAlton Bay weather in aprilAlton Bay weather in mayAlton Bay weather in juneAlton Bay weather in julyAlton Bay weather in augustAlton Bay weather in septemberAlton Bay weather in octoberAlton Bay weather in novemberAlton Bay weather in december

Best time to visit Alton Bay:

The best time to visit Alton Bay during the most sunny months:

  • May — 11.5(h)
  • July — 10.0(h)
  • August — 9.6(h)

Months with the longest average daylight duration in Alton Bay:

  • June — 15.4(h)

The largest precipitation sum in Alton Bay is at

  • June — 177(mm)
  • July — 256(mm)
  • August — 177(mm)
  • December — 167(mm)

    • Weather forecast in the closest to Alton Bay admin centers

    Weather forecast in the closest towns to Alton Bay

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    Frequently asked questions

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