Kalutara weather in May 2020

31
31°C max day temperature
6
6 hours of sunshine per day
13
13 days with some rainfall
25
25°C min night temperature
12
12 hours of daylight per day
VH
Very High heat & humidity
388
388 mm of monthly rainfall
11
11+ (Extreme) UV index
29
29°C sea temperature

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The May weather guide for Kalutara, Sri Lanka shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

First Choice: up to 13% off Sri Lanka holidays

Sale

Save up to 13% on all inclusive holidays to Sri Lanka
Book online with First Choice to receive discount
FREE kids places & low deposits also available

Go to First Choice deal >>

View all First Choice offers

Metric (°C / mm) | Imperial (°F / inches)

Guide to Kalutara weather in May

The average maximum daytime temperature in Kalutara in May is a hot 31°C (88°F) with very high heat & humidity. The average night-time temperature is usually a warm 25°C (77°F). There are usually 6 hours of bright sunshine each day, which represents 51% of the 12 hours of daylight.

Expect 388mm (15.3 inches) of rainfall across the whole of May with 13 days with some rain falling. Maximum UV levels will be extreme (11+ UV index) at midday when the skies are clear.

The average sea temperature in and around Kalutara in May is 29°C (84°F).