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Monthly climate in Colombo, Sri Lanka

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Colombo features a tropical rainforest climate (Af).Temperatures typically range between 27 °C (81 °F) and 28 °C (83 °F) through the year, but rarely can drop to 22 °C (72 °F) or can rise to as high as 34 °C (94 °F).The average annual precipitation amounts to about 2314 mm (91.1 inches) and receives 266 rainy days on the 1 mm (0.04 inches) threshold annually.Colombo enjoys an average of 3736 hours of sunshine throughout the year, and daylight varies from 11 hours 43 minutes to 12 hours 30 minutes per day.

Monthly average temperatures in Colombo, Sri Lanka §

The warmest months in Colombo are March, April and May, with daily mean temperatures ranging from 28 to 28 °C (83 - 83 °F) throughout the day. The coldest temperatures usually occur in October, November and December, when daily mean temperatures range from 27 to 27 °C (81 - 81 °F) throughout the day. On average each year, Colombo 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 Colombo, 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 33°C
(92°F)		 34°C
(94°F)		 33°C
(92°F)		 33°C
(91°F)		 32°C
(90°F)		 31°C
(87°F)		 30°C
(87°F)		 30°C
(85°F)		 30°C
(86°F)		 30°C
(86°F)		 31°C
(88°F)		 32°C
(89°F)
Mean maximum 32°C
(90°F)		 33°C
(92°F)		 32°C
(90°F)		 32°C
(89°F)		 31°C
(89°F)		 30°C
(86°F)		 30°C
(86°F)		 29°C
(85°F)		 30°C
(86°F)		 30°C
(86°F)		 30°C
(87°F)		 31°C
(89°F)
Average high 30°C
(87°F)		 31°C
(88°F)		 31°C
(87°F)		 31°C
(87°F)		 30°C
(86°F)		 29°C
(85°F)		 29°C
(84°F)		 28°C
(83°F)		 29°C
(84°F)		 29°C
(84°F)		 29°C
(85°F)		 30°C
(86°F)
Daily mean 27°C
(81°F)		 28°C
(82°F)		 28°C
(83°F)		 28°C
(83°F)		 28°C
(83°F)		 28°C
(82°F)		 28°C
(82°F)		 27°C
(81°F)		 27°C
(81°F)		 27°C
(81°F)		 27°C
(81°F)		 27°C
(81°F)
Average low 25°C
(77°F)		 25°C
(78°F)		 26°C
(79°F)		 26°C
(80°F)		 27°C
(80°F)		 27°C
(80°F)		 26°C
(80°F)		 26°C
(79°F)		 26°C
(79°F)		 26°C
(78°F)		 25°C
(78°F)		 25°C
(77°F)
Mean minimum 23°C
(73°F)		 24°C
(75°F)		 25°C
(77°F)		 25°C
(78°F)		 26°C
(78°F)		 26°C
(79°F)		 25°C
(78°F)		 25°C
(78°F)		 25°C
(77°F)		 25°C
(77°F)		 24°C
(76°F)		 24°C
(75°F)
Minimum 22°C
(72°F)		 22°C
(73°F)		 24°C
(76°F)		 25°C
(77°F)		 25°C
(78°F)		 25°C
(78°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(77°F)		 24°C
(76°F)		 24°C
(75°F)		 23°C
(73°F)

Compare climate in Colombo with other places

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

Monthly average precipitation in Colombo, Sri Lanka §

Colombo usually has the most precipitation in May, October and November, with an average of 28 rainy days and 312 mm (12.3 inches) of precipitation per month.The driest months in Colombo are January, February and March. On average, 75 mm (3.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Colombo, 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) 54 (2.1) 54 (2.1) 118 (4.6) 125 (4.9) 295 (11.6) 257 (10.1) 168 (6.6) 189 (7.4) 234 (9.2) 347 (13.6) 294 (11.6) 179 (7.1)
Average precipitation days (≥ 1 mm) 7 9 17 25 29 28 26 27 26 29 26 17

Monthly sunshine hours in Colombo, Sri Lanka §

The sunniest months in Colombo are March, April and July, when the sun shines an average of 10 hours 53 minutes a day.Least sunny months in Colombo: January, October and November receive an average of 9 hours 13 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Colombo, 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 270 311 335 334 311 319 332 325 304 299 278 311
Mean daily daylight hours 11h 45m 11h 53m 12h 4m 12h 15m 12h 25m 12h 30m 12h 27m 12h 19m 12h 8m 11h 57m 11h 47m 11h 43m

Solar UV radiation in Colombo, Sri Lanka §

Colombo experiences the highest level of ultraviolet (UV) radiation in April, May and September, when the maximum UV index can reach values of 14 - 15, which corresponds to the Extreme category of sun exposure.January, 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 Colombo UV Index data.

Average daily maximum UV levels by month for Colombo, 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 13 13 13 14 13 11 10