Siem Reap Province · Cambodia
Siem Reap in September
In September, Siem Reap averages a daytime high of 32 °C and a night-time low of 24 °C, with about 265 mm of rain over the month. Siem Reap has no month that is both mild and dry by the measure used here.
- Average high
- 32 °C
- Average low
- 24 °C
- Rain in the month
- 265 mm
- Daylight on 15 Sep
- 12 h 10 min
- Comfortable month
- No
- Places to stay
- 263
When to go
How September compares with the rest of the year in Siem Reap
September is tied for the 6th warmest month in Siem Reap by average daytime high; across the year the highs run from 31 °C to 36 °C and the lows from 21 °C to 25 °C. By day, September is 1 °C cooler than August, and October is 1 °C cooler than September.
September brings 265 mm of rain, more than the monthly average of 118 mm (1419 mm a year); it is the wettest month.
On 15 September the sun is up for about 12 h 10 min, against 11 h 20 min at the shortest and 12 h 50 min at the longest point of the year (calculated from the latitude, sunrise to sunset).
| Month | High | Low | Rain | Comfortable |
|---|---|---|---|---|
| January | 32 °C | 21 °C | 3 mm | |
| February | 34 °C | 22 °C | 10 mm | |
| March | 36 °C | 24 °C | 46 mm | |
| April | 36 °C | 24 °C | 75 mm | |
| May | 35 °C | 25 °C | 136 mm | |
| June | 34 °C | 25 °C | 170 mm | |
| July | 32 °C | 25 °C | 195 mm | |
| August | 32 °C | 24 °C | 229 mm | |
| September | 32 °C | 24 °C | 265 mm | |
| October | 31 °C | 24 °C | 220 mm | |
| November | 31 °C | 23 °C | 60 mm | |
| December | 31 °C | 21 °C | 10 mm |
Comfortable means average daytime high between 18 °C and 29 °C and under 80 mm of rain in the month. Averages for 1991–2020 over the surrounding area, a grid square about 50 km across, so a coast or a nearby mountain can make the town itself warmer or cooler. Data: CRU TS v4.10, Climatic Research Unit, University of East Anglia (Open Database License).
When to go
Is September a good time to visit Siem Reap?
Not by the measure used here: the average high of 32 °C is above 29 °C and about 265 mm of rain is 80 mm or more. No month in Siem Reap meets it.
The measure is about weather for a city stay only; it says nothing about events, school holidays or prices.
Public holidays in Cambodia in September
Nationwide public holidays; shops and offices may close on these dates.
Where to stay
Where to stay in Siem Reap
This guide lists 263 places to stay in Siem Reap, hotels recorded in Wikidata. By straight-line distance from the centre: under 1 km, 78; 1–3 km, 155; 3–10 km, 28; 10 km or more, 2.
Sources: climate from CRU TS v4.10 (Climatic Research Unit, University of East Anglia; Open Database License), 1991–2020 averages; day length calculated from the latitude; public holidays from python-holidays (MIT); places to stay from each operator's own public pages and Wikidata. How this guide is made.