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
    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.

    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

    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.

    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.

    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.

    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.

    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

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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