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Gampaha Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Gampaha.
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Climate overview of Gampaha
The climate in Gampaha, Gampaha District, Sri Lanka, is remarkably consistent, with temperatures year-round averaging 32°C (90°F). The warmest month is March at 34°C (93°F), and the coolest is July at 31°C (88°F).
Rainfall is high, totalling around 2606 mm (103 in) per year. October is the wettest month and January the driest. March is the sunniest month, averaging 9.2 hours of sunshine per day.
Gampaha Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Gampaha - and find the best time to visit.
Monthly Temperature in Gampaha
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 July.
At night, you can expect temperatures ranging from 26°C (79°F) in March to around 23°C (73°F) during July.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Gampaha
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
Sunshine Hours in Gampaha
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
Data from: Colombo, Sri Lanka (25 KM, 15 Miles).
Daily hours of sunshine
Data from: Colombo, Sri Lanka (25 KM, 15 Miles).
Humidity in Gampaha by Month
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
Data from: Colombo, Sri Lanka (25 KM, 15 Miles).
Best Time to Visit Gampaha
Compared with the rest of the year, the most comfortable conditions in Gampaha are usually found in January and December. Conditions are generally least comfortable in February, March, April, May, June, July, August, September, October and November.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
mixed
Feb
very hot
Mar
very hot
Apr
very wet
May
very wet
Jun
very wet
Jul
very wet
Aug
very wet
Sep
very wet
Oct
very wet
Nov
very wet
Dec
mixed
- Best overall: January and December
- Warmest weather: February, March and April
- Most sunshine: March
- Fewest rainy days: January and February
Frequently asked questions about the climate in Gampaha
What is the best time to visit Gampaha?
January and December typically offer the most optimal weather in Gampaha. In contrast, February, March, April, May, June, July, August, September, October and November tend to have less optimal conditions.
What temperatures can I expect in Gampaha?
Daytime highs range from 31°C (88°F) in July to 34°C (93°F) in March. Nighttime lows range from 23°C (73°F) to 26°C (79°F). Temperatures stay relatively stable year-round.
How much rain does Gampaha get?
Annual rainfall is around 2606 mm (103 in). October is the wettest month with 363 mm (14 in), while January is the driest with 64 mm (2.5 in).
How sunny is Gampaha?
Gampaha receives around 2,623 hours of sunshine per year. March is the sunniest month with 276 hours, while September is the cloudiest with just 189 hours. Overall, Gampaha enjoys abundant sunshine.
Gampaha 3-Day Forecast
Gampaha on the map
Gampaha is highlighted - select any city to see its climate.
Popular in October
Where to go in October - average daytime high across popular destinations.
Colombo
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