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Monthly climate in Ratnapura, Sri Lanka

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Ratnapura features a tropical rainforest climate (Af).Temperatures typically range between 23 °C (74 °F) and 24 °C (76 °F) through the year, but rarely can drop to 15 °C (59 °F) or can rise to as high as 32 °C (90 °F).The average annual precipitation amounts to about 4263 mm (167.8 inches) and receives 319 rainy days on the 1 mm (0.04 inches) threshold annually.Ratnapura enjoys an average of 3756 hours of sunshine throughout the year, and daylight varies from 11 hours 43 minutes to 12 hours 29 minutes per day.

Monthly average temperatures in Ratnapura, Sri Lanka §

The warmest months in Ratnapura are April, May and June, with daily mean temperatures ranging from 24 to 24 °C (75 - 76 °F) throughout the day. The coldest temperatures usually occur in January, October and December, when daily mean temperatures range from 23 to 23 °C (74 - 74 °F) throughout the day. On average each year, Ratnapura experiences 312 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 Ratnapura, 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 30°C
(86°F)		 32°C
(90°F)		 31°C
(88°F)		 31°C
(88°F)		 30°C
(86°F)		 29°C
(84°F)		 28°C
(83°F)		 28°C
(83°F)		 29°C
(84°F)		 28°C
(84°F)		 29°C
(84°F)		 30°C
(85°F)
Mean maximum 29°C
(84°F)		 30°C
(86°F)		 30°C
(86°F)		 30°C
(86°F)		 29°C
(85°F)		 27°C
(81°F)		 28°C
(83°F)		 28°C
(82°F)		 28°C
(83°F)		 28°C
(83°F)		 29°C
(84°F)		 29°C
(84°F)
Average high 27°C
(82°F)		 28°C
(83°F)		 28°C
(83°F)		 29°C
(84°F)		 28°C
(82°F)		 27°C
(80°F)		 26°C
(80°F)		 26°C
(79°F)		 26°C
(80°F)		 27°C
(80°F)		 27°C
(81°F)		 27°C
(81°F)
Daily mean 23°C
(74°F)		 24°C
(75°F)		 24°C
(75°F)		 24°C
(76°F)		 24°C
(76°F)		 24°C
(75°F)		 24°C
(75°F)		 23°C
(74°F)		 23°C
(74°F)		 23°C
(74°F)		 23°C
(74°F)		 23°C
(74°F)
Average low 19°C
(67°F)		 20°C
(68°F)		 20°C
(69°F)		 21°C
(70°F)		 22°C
(72°F)		 22°C
(72°F)		 22°C
(71°F)		 21°C
(71°F)		 21°C
(70°F)		 21°C
(70°F)		 21°C
(70°F)		 20°C
(69°F)
Mean minimum 16°C
(61°F)		 17°C
(63°F)		 18°C
(65°F)		 19°C
(67°F)		 21°C
(69°F)		 21°C
(69°F)		 20°C
(69°F)		 20°C
(69°F)		 20°C
(67°F)		 19°C
(67°F)		 19°C
(66°F)		 18°C
(65°F)
Minimum 15°C
(59°F)		 16°C
(62°F)		 17°C
(62°F)		 18°C
(65°F)		 20°C
(68°F)		 20°C
(68°F)		 20°C
(68°F)		 20°C
(68°F)		 19°C
(66°F)		 19°C
(66°F)		 18°C
(65°F)		 17°C
(63°F)

Compare climate in Ratnapura with other places

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

Monthly average precipitation in Ratnapura, Sri Lanka §

Ratnapura usually has the most precipitation in May, October and November, with an average of 28 rainy days and 517 mm (20.3 inches) of precipitation per month.The driest months in Ratnapura are January, June and July. On average, 231 mm (9.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ratnapura, 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) 241 (9.5) 289 (11.4) 384 (15.1) 415 (16.3) 431 (17.0) 233 (9.2) 219 (8.6) 245 (9.6) 287 (11.3) 475 (18.7) 643 (25.3) 402 (15.8)
Average precipitation days (≥ 1 mm) 18 23 29 28 29 28 29 27 26 29 26 27

Monthly sunshine hours in Ratnapura, Sri Lanka §

The sunniest months in Ratnapura are March, July and August, when the sun shines an average of 10 hours 46 minutes a day.Least sunny months in Ratnapura: January, October and November receive an average of 9 hours 12 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ratnapura, 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 267 308 332 331 318 331 335 333 311 302 277 306
Mean daily daylight hours 11h 46m 11h 53m 12h 4m 12h 15m 12h 24m 12h 29m 12h 27m 12h 18m 12h 8m 11h 57m 11h 48m 11h 43m

Solar UV radiation in Ratnapura, Sri Lanka §

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

Average daily maximum UV levels by month for Ratnapura, 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 15 15 15 13 13 14 14 13 12 11