Best year time to visit Grantham

General weather information about Grantham

Average annual temperature is 12.8 °C

Absolute maximum temperature: 34.5 °C

Absolute minimum temperature: -10.9 °C

Number of sunny days: 175 days

Number of rainy days: 184 days

Number of snow days: 6 days

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

Grantham air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)16.820.021.530.228.433.534.533.334.327.421.716.7
Average daytime temperature (°C)8.110.211.120.022.326.530.728.924.419.211.58.8
Average temperature (°C)4.24.25.113.115.319.924.623.019.113.86.04.5
Average night temperature (°C)1.1-0.40.47.38.714.219.418.114.69.41.71.2
Absolute minimum temperature (°C)-4.6-10.9-6.2-0.22.68.316.114.29.22.2-5.9-4.6

Grantham monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.015.014.014.013.011.010.09.0
Daylight mean duration (h)9.710.712.013.314.415.014.713.712.511.110.09.4
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)4.86.77.59.311.310.612.411.08.68.07.54.2
Precipitation (mm)87388412123103981031446061117
Sunny days12161316181161115202116
Rainy days19101714131925201511813
Snow days021000000012

Grantham - weather forecast by months

Grantham weather in januaryGrantham weather in februaryGrantham weather in marchGrantham weather in aprilGrantham weather in mayGrantham weather in juneGrantham weather in julyGrantham weather in augustGrantham weather in septemberGrantham weather in octoberGrantham weather in novemberGrantham weather in december

Best time to visit Grantham:

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

  • May — 11.3(h)
  • July — 12.4(h)
  • August — 11.0(h)

The largest precipitation sum in Grantham is at

  • April — 121(mm)
  • September — 144(mm)
  • December — 117(mm)

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    Frequently asked questions

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