Siem Reap monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Siem Reap

Siem Reap average temperature chart (Celsius) Siem Reap average temperature chart (Fahrenheit)
Average monthly temperatures in Siem Reap (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 31.1 33.4 35.2 35.7 34 32.7 31.7 31.6 31.1 30.4 30.2 30.1
°F 87.9 92.1 95.4 96.2 93.1 90.9 89.1 88.9 87.9 86.7 86.4 86.2

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.

Siem Reap monthly rainfall chart (mm) Siem Reap monthly rainfall chart (inches)
Average monthly rainfall in Siem Reap (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 1 9 28 64 146 166 186 224 250 215 61 7
inches 0 0.4 1.1 2.5 5.7 6.6 7.3 8.8 9.8 8.5 2.4 0.3
Rainy days 1 2 4 7 15 15 18 18 18 15 6 2

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Siem Reap

Siem Reap average daily sunshine chart
Average daily sunshine Siem Reap
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 9.6 9.4 8.9 8.5 7.4 6.1 6 5.7 5.6 7.2 8.6 9.3

Day / night temperatures

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

Siem Reap average minimum / maximum temperatures (Celsius) Siem Reap average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Siem Reap (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 19.1 21.1 23.1 24.1 24.6 24.5 24.3 24 24 23.5 22 19.7
Max °C 31.4 33.7 35.5 36 34.2 33 31.9 31.8 31.3 30.6 30.5 30.4
Min °F 66.3 70 73.6 75.3 76.3 76 75.7 75.2 75.1 74.2 71.5 67.4
Max °F 77.4 81.3 84.7 86 84.9 83.7 82.6 82.2 81.7 80.6 79.2 77

Sea temperature

The graph below shows the average sea temperature.

Siem Reap average sea temperature chart (Celsius) Siem Reap average sea temperature chart (Fahrenheit)
Average sea temperature around Siem Reap in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 26.7 26.9 27.8 29 29.9 29.7 29.3 29.2 29 28.9 28.5 27.4
°F 80 80.4 82 84.2 85.7 85.5 84.8 84.5 84.3 84 83.2 81.3

Wind speed

The graph below shows the average wind speed.

Siem Reap average winspeed by month (km/h) Siem Reap average winspeed by month (mph)
Average wind speed in Siem Reap (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 6 5 6 6 6 7 7 7 5 6 7 6
mph 4 3 4 4 4 4 4 4 3 4 4 4

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.

Siem Reap relative humidity averages
Average relative humidity in Siem Reap
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
70% 68% 67% 71% 79% 81% 83% 84% 84% 83% 80% 80%

Other monthly averages

UV index Best time to go?

Siem Reap weather stats

Siem Reap weather statistics
Hottest month: April 35.7°C 96.3°F
Driest month: January 1mm 0ins
Sunniest month: January 9.6hrs
Coldest month: December 30.1°C 86.2°F
Wettest month: September 250mm 9.8ins
Warmest sea: May 29.9°C 85.8°F
Map showing location of Siem Reap (13.36179, 103.86056)

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