Best year time to visit Grantham

General weather information about Grantham

Average annual temperature is 10.8 °C

Absolute maximum temperature: 29.8 °C

Absolute minimum temperature: -4.1 °C

Number of sunny days: 124 days

Number of rainy days: 241 days

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

Grantham air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)12.414.314.817.419.228.426.227.029.822.414.313.5
Average daytime temperature (°C)7.69.69.612.116.221.419.820.421.315.49.48.7
Average temperature (°C)4.76.46.68.212.116.616.316.416.912.06.86.6
Average night temperature (°C)2.13.53.44.47.911.612.712.512.89.14.24.3
Absolute minimum temperature (°C)-3.8-1.6-3.8-0.34.66.19.68.77.42.6-2.8-4.1

Grantham monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)8.010.012.014.016.016.016.015.013.011.09.07.0
Daylight mean duration (h)8.29.911.914.015.816.816.314.712.710.68.77.7
Daylight minimum duration (h)7.09.010.012.014.016.015.013.011.09.08.07.0
Sunshine mean duration (h)4.55.14.98.310.011.710.510.68.25.04.22.3
Precipitation (mm)381495896139101597515261105
Sunny days1517510161237119118
Rainy days161126201518282419221923
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 best time to visit Grantham during the most sunny months:

  • May — 10.0(h)
  • June — 11.7(h)
  • July — 10.5(h)
  • August — 10.6(h)

Months with the longest average daylight duration in Grantham:

  • May — 15.8(h)
  • June — 16.8(h)
  • July — 16.3(h)

The largest precipitation sum in Grantham is at

  • March — 95(mm)
  • July — 101(mm)
  • October — 152(mm)
  • December — 105(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.