Weather in Gampaha in May

General weather information about Gampaha

Average annual temperature is 20.6 °C

Absolute maximum temperature: 30.7 °C

Absolute minimum temperature: 10.5 °C

Number of sunny days: 37 days

Number of rainy days: 328 days

Look at detailed online map of Gampaha

* Weather data for Gampaha Sri Lanka is based on climate observations for 2026 year

Gampaha air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)21.522.925.626.328.428.730.230.726.625.425.124.8
Average daytime temperature (°C)20.521.523.224.925.927.827.328.925.623.923.422.5
Average temperature (°C)17.418.319.320.421.622.822.423.121.620.520.119.7
Average night temperature (°C)14.114.915.716.017.418.418.217.918.317.417.117.4
Absolute minimum temperature (°C)10.511.314.614.315.117.015.616.016.315.814.814.7

Gampaha monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)11.011.012.012.012.012.012.012.012.012.011.011.0
Daylight mean duration (h)11.811.912.112.312.412.512.512.312.212.011.811.7
Daylight minimum duration (h)11.011.011.012.012.012.012.012.012.011.011.011.0
Sunshine mean duration (h)8.88.79.010.19.310.69.610.78.47.47.36.6
Precipitation (mm)20115211411516282106124250449464420
Sunny days3442611060100
Rainy days282427282529212530303031
Snow days000000000000

Gampaha - weather forecast by months

Gampaha weather in januaryGampaha weather in februaryGampaha weather in marchGampaha weather in aprilGampaha weather in mayGampaha weather in juneGampaha weather in julyGampaha weather in augustGampaha weather in septemberGampaha weather in octoberGampaha weather in novemberGampaha weather in december

Best time to visit Gampaha:

The largest precipitation sum in Gampaha is at

  • October — 449(mm)
  • November — 464(mm)
  • December — 420(mm)

    • Weather forecast in the closest to Gampaha admin centers

    Weather forecast in the closest towns to Gampaha

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    Frequently asked questions

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