Climate averages 1991–2020
Siem Reap weather
in October.
A hot, very wet month: the coolest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a hot month in Siem Reap: daytime highs average 30.0°C and nights cool to about 23.8°C. By daytime temperature it is the coolest month of the year.
Expect about 224 mm of rain on roughly 23 days, which makes October a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 51 min on an average October day.
The nearest other city in this atlas is Battambang (77 km away). In October its highs average 30.4°C, about as warm as Siem Reap, with 190 mm of rain.
Among the 8 cities listed in Cambodia, Siem Reap ranks 6th of 8 for the warmest October highs and 4th of 8 for the driest October (rainfall, lowest first). The mean October high of those 8 cities is 30.0°C; Siem Reap is level with that mean.
From October to November, average highs rise by 0.1°C to 30.1°C, and monthly rainfall falls from 224 mm to 62 mm.
The annual picture
October 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 | 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, selected | 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
October in nearby cities
- Battambang in OctoberCambodia · 77 kmHigh 30.4°C · Low 23.6°C · 190 mm rain
- Paoy Paet in OctoberCambodia · 144 kmHigh 29.7°C · Low 23.3°C · 157 mm rain
- Kampong Chhnang in OctoberCambodia · 151 kmHigh 30.3°C · Low 24.0°C · 209 mm rain
- Chanthaburi in OctoberThailand · 208 kmHigh 29.4°C · Low 24.0°C · 238 mm rain
- Phnom Penh in OctoberCambodia · 231 kmHigh 30.4°C · Low 24.1°C · 244 mm rain
- Ubon Ratchathani in OctoberThailand · 234 kmHigh 29.8°C · Low 22.7°C · 124 mm rain
- Dangkao in OctoberCambodia · 234 kmHigh 30.4°C · Low 24.1°C · 244 mm rain
- Kabin Buri in OctoberThailand · 241 kmHigh 29.8°C · Low 22.9°C · 143 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.