Weather in Grantham in August

General weather information about Grantham

Average annual temperature is 20.6 °C

Absolute maximum temperature: 37.9 °C

Absolute minimum temperature: -0.3 °C

Number of sunny days: 151 days

Number of rainy days: 214 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)24.726.126.928.732.635.134.837.932.729.925.725.0
Average daytime temperature (°C)19.021.722.825.328.130.432.134.130.025.720.416.9
Average temperature (°C)13.916.617.820.122.625.727.629.025.120.515.412.6
Average night temperature (°C)9.812.913.615.717.921.724.225.021.116.011.38.9
Absolute minimum temperature (°C)-0.32.00.99.411.818.422.522.916.79.62.21.0

Grantham 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)10.411.112.012.913.714.113.913.212.311.410.610.2
Daylight minimum duration (h)10.010.011.012.013.013.013.012.011.011.010.010.0
Sunshine mean duration (h)7.58.28.49.510.510.911.011.310.09.37.16.3
Precipitation (mm)20959951441241831941251223287146
Sunny days161212139331013241620
Rainy days15161917222728211771411
Snow days000000000000

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 largest precipitation sum in Grantham is at

  • January — 209(mm)
  • June — 183(mm)
  • July — 194(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.