Gampaha Weather & Climate: Best Time to Visit

In Gampaha temperatures are generally consistent throughout the year. Average maximum daytime temperatures range from a very warm 34°C (93°F) in March, the warmest time of the year, to a very warm 31°C (88°F) during cooler months like January.

At night, you can expect temperatures ranging from 26°C (79°F) in March to around 23°C (73°F) during January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Gampaha experiences significant rainfall throughout the year, averaging 2606 mm (103 in) of precipitation annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, October it receives heavy rainfall, averaging 363 mm (14 in) of precipitation, recorded across 16 rainy days. In contrast, the driest month January brings less rainfall, with 64 mm (2.5 in) over 5 rainy days. For more details, please visit our Gampaha Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

While the amount of sunshine in Gampaha varies throughout the year, all seasons offer their own charm. Enjoy up to 9.2 hours of daily sun in March, and experience slightly darker atmosphere in September, with about 6.3 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in Gampaha.

The city experiences its highest humidity in June, reaching 79%. In February, the humidity drops to its lowest level at 69%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year