SeasonMapCambodia in September
September is Cambodia's weakest month (rank 12 of 12): its 7 destinations average 51/100, led by Kep at 57 — 34°C and 27 rainy days — while Phnom Penh is warmer at 39°C and scores 47.
#12 of 12 months for Cambodia · 7 destinations · updated September 2026 · climate normals from ERA5 reanalysis
Where in Cambodia in September
| # | Place | Type | Feels-like high | Rain | Comfort | At its best |
|---|---|---|---|---|---|---|
| 1 | Kep | Beach | 34°C | 289 mm · 27 days | 57 tier D | — |
| 2 | Battambang | City | 37°C | 210 mm · 26 days | 53 tier D | — |
| 3 | Sihanoukville | Beach | 34°C | 530 mm · 29 days | 53 tier D | — |
| 4 | Koh Rong | Island | 35°C | 545 mm · 29 days | 51 tier D | — |
| 5 | Siem Reap | City | 37°C | 254 mm · 27 days | 49 tier F | — |
| 6 | Kampot | City | 34°C | 289 mm · 27 days | 48 tier F | — |
| 7 | Phnom Penh | City | 39°C | 256 mm · 27 days | 47 tier F | — |
Comfort is SeasonMap's 0–100 score; each place is judged through the lens that suits it — beaches on beach weather, ski resorts on snow. "At its best" means September is one of that place's own top three months. Feels-like highs fold in humidity, wind and sun.