Phnom Penh monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Phnom Penh

Phnom Penh average temperature chart (Celsius) Phnom Penh average temperature chart (Fahrenheit)
Average monthly temperatures in Phnom Penh (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 31.4 32 33.6 34.2 33.7 32.6 31.6 31.6 31 30.5 29.9 29.9
°F 88.6 89.6 92.6 93.6 92.7 90.7 88.8 88.8 87.8 86.8 85.9 85.8

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Phnom Penh monthly rainfall chart (mm) Phnom Penh monthly rainfall chart (inches)
Average monthly rainfall in Phnom Penh (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 6 8 29 68 166 156 149 162 245 263 115 27
inches 0.2 0.3 1.1 2.7 6.5 6.1 5.9 6.4 9.6 10.3 4.5 1.1
Rainy days 1 1 3 6 15 15 17 16 19 17 9 4

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Phnom Penh

Phnom Penh average daily sunshine chart
Average daily sunshine Phnom Penh
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 9.4 9.3 8.8 8.3 7.2 6.3 5.8 5.7 5.3 6.8 8.2 9.1

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Phnom Penh average minimum / maximum temperatures (Celsius) Phnom Penh average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Phnom Penh (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 21.1 22.2 23.3 24 24.5 24.4 24.5 24.5 24.5 24.4 23.3 21.7
Max °C 31.7 32.3 33.9 34.5 34 32.8 31.8 31.8 31.2 30.6 30.1 30.1
Min °F 70 71.9 73.9 75.1 76 75.9 76 76 76 75.9 73.9 71.1
Max °F 79.5 81 83.5 84.6 84.6 83.5 82.6 82.6 82 81.5 80.1 78.6

Sea temperature

The graph below shows the average sea temperature.

Phnom Penh average sea temperature chart (Celsius) Phnom Penh average sea temperature chart (Fahrenheit)
Average sea temperature around Phnom Penh in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 27.3 27.7 28.6 29.8 30.4 29.9 29.3 29 29 28.9 28.6 27.8
°F 81.2 81.8 83.4 85.6 86.7 85.8 84.7 84.3 84.1 84 83.4 82.1

Wind speed

The graph below shows the average wind speed.

Phnom Penh average winspeed by month (km/h) Phnom Penh average winspeed by month (mph)
Average wind speed in Phnom Penh (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 9 9 10 9 6 9 9 9 8 8 9 10
mph 5 5 6 6 4 6 6 6 5 5 6 6

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Phnom Penh relative humidity averages
Average relative humidity in Phnom Penh
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
71% 69% 69% 72% 80% 80% 82% 82% 84% 86% 79% 75%

Other monthly averages

UV index Best time to go?

Phnom Penh weather stats

Phnom Penh weather statistics
Hottest month: April 34.2°C 93.6°F
Driest month: January 6mm 0.2ins
Sunniest month: January 9.4hrs
Coldest month: December 29.9°C 85.8°F
Wettest month: October 263mm 10.4ins
Warmest sea: May 30.4°C 86.7°F
Map showing location of Phnom Penh (11.56245, 104.91601)

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