Siem Reap Seasonal temperature break down - The average median temperature March through May is approximately 86°F with highs averaging at 96°F and lows averaging at 78°F. June through August has an approximate average median temperature of 83°F with highs averaging at 91°F, lows typically average at 77°F. Average median temperatures September through November average out at 80°F, high temperatures average out at 87°F and lows average at 75°F.
The average median temperature December through February is approximately 79°F with highs averaging at 89°F, lows average out at 71°F.
The average Siem Reap annual median temperature averages out at approximately 82°F. The coldest month in Siem Reap is December with a median temperature of 77°F, the average high for the month of December is 86°F with an average low of 68°F. The hottest month in Siem Reap is April with an approximate median temperature of 87°F, the average high for the month of April is 98°F with an average low of 79°F.