Best year time to visit Grotons

General weather information about Grotons

Average annual temperature is 15.7 °C

Absolute maximum temperature: 35.0 °C

Absolute minimum temperature: -7.5 °C

Number of sunny days: 180 days

Number of rainy days: 185 days

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

Grotons air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)20.123.422.428.926.930.035.034.034.127.323.118.9
Average daytime temperature (°C)11.712.813.620.621.126.030.729.526.821.614.712.3
Average temperature (°C)7.88.38.915.516.921.526.425.122.416.910.08.2
Average night temperature (°C)4.64.44.911.613.417.923.121.818.813.16.24.9
Absolute minimum temperature (°C)-2.3-7.5-1.13.38.113.020.016.614.37.4-2.9-1.2

Grotons monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.014.013.011.010.09.0
Daylight mean duration (h)9.910.812.013.214.214.714.513.612.411.210.19.6
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)6.07.48.29.710.711.612.110.69.29.27.86.1
Precipitation (mm)71555013769125136691015045122
Sunny days13161716141261113202418
Rainy days18121414171825201711613
Snow days000000000000

Grotons - weather forecast by months

Grotons weather in januaryGrotons weather in februaryGrotons weather in marchGrotons weather in aprilGrotons weather in mayGrotons weather in juneGrotons weather in julyGrotons weather in augustGrotons weather in septemberGrotons weather in octoberGrotons weather in novemberGrotons weather in december

Best time to visit Grotons:

The best time to visit Grotons during the most sunny months:

  • June — 11.6(h)
  • July — 12.1(h)

The largest precipitation sum in Grotons is at

  • April — 137(mm)
  • June — 125(mm)
  • July — 136(mm)
  • December — 122(mm)

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    Frequently asked questions

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