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Monthly climate in Phnom Penh, Cambodia

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Phnom Penh features a tropical monsoon climate (Am).Temperatures typically range between 27 °C (81 °F) and 30 °C (87 °F) through the year, but rarely can drop to 19 °C (66 °F) or can rise to as high as 40 °C (104 °F).The average annual precipitation amounts to about 1452 mm (57.2 inches) and receives 192 rainy days on the 1 mm (0.04 inches) threshold annually.Phnom Penh enjoys an average of 3497 hours of sunshine throughout the year, and daylight varies from 11 hours 26 minutes to 12 hours 46 minutes per day.

Monthly average temperatures in Phnom Penh, Cambodia §

The warmest months in Phnom Penh are March, April and May, with daily mean temperatures ranging from 30 to 30 °C (86 - 87 °F) throughout the day. The coldest temperatures usually occur in January, November and December, when daily mean temperatures range from 27 to 28 °C (81 - 82 °F) throughout the day. On average each year, Phnom Penh 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 Phnom Penh, Cambodia.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 36°C
(96°F)		 36°C
(98°F)		 39°C
(102°F)		 39°C
(103°F)		 40°C
(104°F)		 37°C
(99°F)		 38°C
(100°F)		 36°C
(98°F)		 36°C
(97°F)		 35°C
(95°F)		 35°C
(95°F)		 34°C
(94°F)
Mean maximum 34°C
(94°F)		 35°C
(96°F)		 37°C
(99°F)		 38°C
(101°F)		 37°C
(99°F)		 36°C
(97°F)		 36°C
(97°F)		 36°C
(97°F)		 35°C
(96°F)		 34°C
(94°F)		 34°C
(93°F)		 33°C
(92°F)
Average high 32°C
(90°F)		 33°C
(93°F)		 35°C
(95°F)		 35°C
(96°F)		 35°C
(94°F)		 34°C
(93°F)		 33°C
(92°F)		 33°C
(92°F)		 33°C
(91°F)		 32°C
(90°F)		 32°C
(89°F)		 31°C
(88°F)
Daily mean 27°C
(82°F)		 28°C
(83°F)		 30°C
(86°F)		 30°C
(87°F)		 30°C
(86°F)		 29°C
(85°F)		 29°C
(84°F)		 29°C
(84°F)		 28°C
(83°F)		 28°C
(83°F)		 28°C
(82°F)		 27°C
(81°F)
Average low 24°C
(75°F)		 24°C
(75°F)		 26°C
(79°F)		 27°C
(80°F)		 27°C
(81°F)		 27°C
(80°F)		 26°C
(79°F)		 26°C
(79°F)		 26°C
(79°F)		 26°C
(78°F)		 25°C
(77°F)		 24°C
(75°F)
Mean minimum 20°C
(69°F)		 22°C
(71°F)		 24°C
(75°F)		 24°C
(76°F)		 26°C
(78°F)		 26°C
(79°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(77°F)		 24°C
(76°F)		 23°C
(73°F)		 21°C
(70°F)
Minimum 19°C
(66°F)		 20°C
(68°F)		 23°C
(74°F)		 22°C
(73°F)		 24°C
(76°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(77°F)		 24°C
(76°F)		 23°C
(73°F)		 22°C
(71°F)		 19°C
(67°F)

Compare climate in Phnom Penh with other places

Compare temperature, precipitation, sunshine, UV index in Phnom Penh, Cambodia with other places around the world.

Monthly average precipitation in Phnom Penh, Cambodia §

Phnom Penh usually has the most precipitation in August, September and October, with an average of 25 rainy days and 230 mm (9.0 inches) of precipitation per month.The driest months in Phnom Penh are January, February and March. On average, 20 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Phnom Penh, Cambodia.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) 19 (0.8) 10 (0.4) 30 (1.2) 78 (3.1) 155 (6.1) 155 (6.1) 154 (6.1) 197 (7.7) 246 (9.7) 246 (9.7) 121 (4.8) 40 (1.6)
Average precipitation days (≥ 1 mm) 3 2 5 14 23 24 25 26 26 24 15 5

Monthly sunshine hours in Phnom Penh, Cambodia §

The sunniest months in Phnom Penh are March, April and May, when the sun shines an average of 10 hours 21 minutes a day.Least sunny months in Phnom Penh: January, September and October receive an average of 8 hours 37 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Phnom Penh, Cambodia.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 256 297 328 312 312 282 286 287 261 275 288 307
Mean daily daylight hours 11h 30m 11h 44m 12h 3m 12h 22m 12h 38m 12h 46m 12h 42m 12h 28m 12h 10m 11h 51m 11h 35m 11h 26m

Solar UV radiation in Phnom Penh, Cambodia §

Phnom Penh experiences the highest level of ultraviolet (UV) radiation in March, April 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 11. For more detailed information, check out our hourly Phnom Penh UV Index data.

Average daily maximum UV levels by month for Phnom Penh, Cambodia.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) 10 14 15 15 14 13 14 14 14 13 11 10