Climate averages 1991–2020
Siem Reap weather
in July.
A hot, wet month: the joint 6th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Siem Reap: daytime highs average 31.3°C and nights cool to about 25.3°C. By daytime temperature it is the joint 6th warmest of the 12 months.
Expect about 135 mm of rain on roughly 22 days, which makes July a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 50 min on an average July day.
The nearest other city in this atlas is Battambang (77 km away). In July its highs average 32.4°C, 1.1°C warmer than Siem Reap, with 105 mm of rain.
Among the 8 cities listed in Cambodia, Siem Reap ranks 5th of 8 for the warmest July highs and 2nd of 8 for the driest July (rainfall, lowest first). The mean July high of those 8 cities is 31.1°C; Siem Reap is 0.2°C warmer than that mean.
From July to August, average highs fall by 0.3°C to 31.0°C, and monthly rainfall rises from 135 mm to 162 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Siem Reap climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 31.3°C21.9°C | 21.9°C | 9.0 | 1.9 | 11.411 h |
| February | 32.8°C23.5°C | 23.5°C | 13 | 2.6 | 11.712 h |
| March | 34.1°C25.4°C | 25.4°C | 52 | 7.8 | 12.012 h |
| April | 34.2°C26.1°C | 26.1°C | 94 | 13.4 | 12.412 h |
| May | 33.0°C26.1°C | 26.1°C | 148 | 21.4 | 12.713 h |
| June | 32.0°C25.7°C | 25.7°C | 131 | 20.7 | 12.913 h |
| July, selected | 31.3°C25.3°C | 25.3°C | 135 | 22.0 | 12.813 h |
| August | 31.0°C25.1°C | 25.1°C | 162 | 24.3 | 12.613 h |
| September | 30.3°C24.5°C | 24.5°C | 244 | 25.9 | 12.212 h |
| October | 30.0°C23.8°C | 23.8°C | 224 | 23.2 | 11.812 h |
| November | 30.1°C22.8°C | 22.8°C | 62 | 8.8 | 11.512 h |
| December | 30.1°C21.7°C | 21.7°C | 16 | 2.9 | 11.411 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Battambang in JulyCambodia · 77 kmHigh 32.4°C · Low 25.3°C · 105 mm rain
- Paoy Paet in JulyCambodia · 144 kmHigh 30.8°C · Low 24.6°C · 161 mm rain
- Kampong Chhnang in JulyCambodia · 151 kmHigh 31.7°C · Low 24.9°C · 166 mm rain
- Chanthaburi in JulyThailand · 208 kmHigh 28.8°C · Low 25.0°C · 369 mm rain
- Phnom Penh in JulyCambodia · 231 kmHigh 31.8°C · Low 25.0°C · 154 mm rain
- Ubon Ratchathani in JulyThailand · 234 kmHigh 30.9°C · Low 24.6°C · 232 mm rain
- Dangkao in JulyCambodia · 234 kmHigh 31.8°C · Low 25.0°C · 154 mm rain
- Kabin Buri in JulyThailand · 241 kmHigh 30.1°C · Low 24.1°C · 251 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Siem Reap) is explained once on the Siem Reap year overview and on the Sources, method and limits page.