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Climate · Phnom Penh

Phnom Penh in May

Very hot and wet, as the days lengthen.

Typical weather, averaged over 30 years

May in Phnom Penh is very hot: highs near 96°F, lows near 79°F. Rain falls on about five days a week, more often as the month goes on, and the days lengthen by 12 minutes from the first week to the last.May in Phnom Penh is very hot: highs near 36°C, lows near 26°C. Rain falls on about five days a week, more often as the month goes on, and the days lengthen by 12 minutes from the first week to the last.

High
96°F36°Caverage
Low
79°F26°Caverage
Wet days
5a week · 75% of days
Daylight
12h 39mon average

Is May a good time to visit Phnom Penh?

May sits outside Phnom Penh's most comfortable months, which run from December to January. Expect very hot days and rain on about five days a week.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How May sits in the year

week by week

Temperature

Highs near 96°F in May, against 90°F to 98°F through the year.Highs near 36°C in May, against 32°C to 37°C through the year.

Chance of a wet day

75% of days in May, against 7% to 90% through the year.

Cloud cover

81% cover in May, against 57% to 81% through the year.

Daylight

12h 39m in May, against 11h 27m to 12h 47m through the year.

Week by week, lightly smoothed, with May shaded. The olive line marks the most comfortable months. Hover or tap a week for its figures.

Either side

  1. April98°37°low 79°low 26°3 wet days a weekRain on about three days a week.
  2. May96°36°low 79°low 26°5 wet days a weekRain on about five days a week.
  3. June94°34°low 78°low 26°5 wet days a weekRain on about five days a week.

Where Phnom Penh sits, in May

Asia/Phnom Penh
this place
typical high in May 40°F4°C95°F35°C
Sunrise, mid-May
5:37 AMsets 6:16 PM
Above the sea
20 mlow-lying
Latitude
11.6°Nnorthern hemisphere
Nearest of ours
Cardamom Mountains115 km west

The land around Phnom Penh, shaded by its typical high in May, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in Cambodia in May

high · low · wet days
See May on the planning mapThe whole year in Phnom Penh

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Phnom Penh. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match.Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match. Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.