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Monthly climate in Kalutara, Western, Sri Lanka

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Kalutara features a tropical rainforest climate (Af).Temperatures typically range between 26 °C (80 °F) and 28 °C (82 °F) through the year, but rarely can drop to 20 °C (69 °F) or can rise to as high as 33 °C (91 °F).The average annual precipitation amounts to about 2720 mm (107.1 inches) and receives 279 rainy days on the 1 mm (0.04 inches) threshold annually.Kalutara enjoys an average of 3737 hours of sunshine throughout the year, and daylight varies from 11 hours 44 minutes to 12 hours 28 minutes per day.

Monthly average temperatures in Kalutara, Western, Sri Lanka §

The warmest months in Kalutara are March, April and May, with daily mean temperatures ranging from 27 to 28 °C (82 - 82 °F) throughout the day. The coldest temperatures usually occur in January, November and December, when daily mean temperatures range from 26 to 26 °C (80 - 80 °F) throughout the day. On average each year, Kalutara experiences 329 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Kalutara, Western, Sri Lanka.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 31°C
(89°F)		 32°C
(90°F)		 32°C
(90°F)		 33°C
(91°F)		 31°C
(88°F)		 30°C
(86°F)		 30°C
(86°F)		 29°C
(85°F)		 30°C
(86°F)		 30°C
(85°F)		 30°C
(86°F)		 30°C
(87°F)
Mean maximum 31°C
(88°F)		 31°C
(88°F)		 31°C
(89°F)		 31°C
(88°F)		 31°C
(87°F)		 29°C
(85°F)		 29°C
(85°F)		 29°C
(84°F)		 29°C
(85°F)		 29°C
(85°F)		 30°C
(86°F)		 30°C
(87°F)
Average high 29°C
(85°F)		 29°C
(85°F)		 30°C
(86°F)		 30°C
(86°F)		 29°C
(85°F)		 29°C
(84°F)		 28°C
(83°F)		 28°C
(83°F)		 28°C
(83°F)		 28°C
(83°F)		 29°C
(84°F)		 29°C
(84°F)
Daily mean 26°C
(80°F)		 27°C
(81°F)		 27°C
(82°F)		 28°C
(82°F)		 28°C
(82°F)		 27°C
(81°F)		 27°C
(81°F)		 27°C
(80°F)		 27°C
(80°F)		 27°C
(80°F)		 26°C
(80°F)		 26°C
(80°F)
Average low 24°C
(76°F)		 25°C
(77°F)		 25°C
(78°F)		 26°C
(79°F)		 26°C
(79°F)		 26°C
(79°F)		 26°C
(79°F)		 25°C
(78°F)		 25°C
(78°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(76°F)
Mean minimum 22°C
(72°F)		 23°C
(74°F)		 24°C
(76°F)		 25°C
(77°F)		 25°C
(78°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(76°F)		 24°C
(76°F)		 24°C
(76°F)		 24°C
(75°F)		 23°C
(74°F)
Minimum 20°C
(69°F)		 22°C
(71°F)		 23°C
(74°F)		 24°C
(76°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(77°F)		 24°C
(76°F)		 24°C
(75°F)		 24°C
(75°F)		 23°C
(74°F)		 22°C
(72°F)

Compare climate in Kalutara with other places

Compare temperature, precipitation, sunshine, UV index in Kalutara, Western, Sri Lanka with other places around the world.

Monthly average precipitation in Kalutara, Western, Sri Lanka §

Kalutara usually has the most precipitation in May, June and October, with an average of 29 rainy days and 334 mm (13.1 inches) of precipitation per month.The driest months in Kalutara are January, February and March. On average, 86 mm (3.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Kalutara, Western, Sri Lanka.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 76 (3.0) 65 (2.5) 118 (4.7) 144 (5.7) 347 (13.7) 330 (13.0) 263 (10.4) 296 (11.6) 277 (10.9) 324 (12.7) 292 (11.5) 188 (7.4)
Average precipitation days (≥ 1 mm) 9 11 16 24 30 29 29 29 27 30 26 19

Monthly sunshine hours in Kalutara, Western, Sri Lanka §

The sunniest months in Kalutara are March, April and July, when the sun shines an average of 10 hours 47 minutes a day.Least sunny months in Kalutara: January, October and November receive an average of 9 hours 18 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Kalutara, Western, Sri Lanka.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 270 307 332 329 314 324 330 327 307 305 281 306
Mean daily daylight hours 11h 46m 11h 54m 12h 4m 12h 15m 12h 24m 12h 28m 12h 26m 12h 18m 12h 8m 11h 57m 11h 48m 11h 44m

Solar UV radiation in Kalutara, Western, Sri Lanka §

Kalutara experiences the highest level of ultraviolet (UV) radiation in April, August and September, when the maximum UV index can reach values of 14 - 15, which corresponds to the Extreme category of sun exposure.June, November and December are in the Very High / Extreme exposure category. In these months, the maximum values of the UV index do not exceed 12. For more detailed information, check out our hourly Kalutara UV Index data.

Average daily maximum UV levels by month for Kalutara, Western, Sri Lanka.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 12 14 14 15 14 12 13 14 14 13 11 10