Cambodia (Sihanoukville) · September
Low seasonCambodia · Asia
Climate Overview
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ø day, range from coolest to warmest dayØ dayrange | 31° (88°)28– (82–)32 (90) | 31° (88°)28– (82–)33 (91) | 32° (90°)29– (84–)33 (91) | 33° (91°)29– (84–)34 (93) | 32° (90°)29– (84–)34 (93) | 31° (88°)28– (82–)33 (91) | 31° (88°)27– (81–)32 (90) | 31° (88°)27– (81–)32 (90) | 30° (86°)27– (81–)32 (90) | 31° (88°)27– (81–)32 (90) | 31° (88°)28– (82–)32 (90) | 31° (88°)28– (82–)32 (90) |
Ø night, range from coldest to warmest nightØ nightrange | 24° (75°)20– (68–)26 (79) | 24° (75°)21– (70–)26 (79) | 25° (77°)23– (73–)27 (81) | 26° (79°)24– (75–)28 (82) | 27° (81°)24– (75–)29 (84) | 27° (81°)24– (75–)29 (84) | 26° (79°)23– (73–)28 (82) | 26° (79°)24– (75–)28 (82) | 26° (79°)24– (75–)27 (81) | 26° (79°)24– (75–)27 (81) | 26° (79°)23– (73–)27 (81) | 25° (77°)21– (70–)27 (81) |
☀️Sunshine | 8h UV 8 | 9h UV 9 | 9h UV 9 | 9h UV 9 | 7h UV 8 | 5h UV 7 | 5h UV 7 | 5h UV 7 | 5h UV 7 | 6h UV 7 | 7h UV 8 | 8h UV 8 |
🌊Water Temp | 28° (82°) | 29° (84°) | 30° (86°) | 31° (88°) | 31° (88°) | 30° (86°) | 30° (86°) | 30° (86°) | 30° (86°) | 30° (86°) | 30° (86°) | 29° (84°) |
🌧Rain Days | 3d37mm (1.5") | 3d38mm (1.5") | 6d98mm (3.9") | 10d155mm (6.1") | 16d264mm (10.4") | 17d344mm (13.5") | 21d476mm (18.7") | 19d390mm (15.4") | 20d546mm (21.5") | 17d300mm (11.8") | 11d153mm (6.0") | 5d71mm (2.8") |
Best travel time current monthØ = average · small figures = range: coolest–warmest day / coldest–warmest nightClimate data 2005–2025 · Source: ERA5 + station data
Off-season — lowest travel prices with still acceptable climate.
September in Cambodia (Sihanoukville) offers acceptable conditions — but it's not among the top travel months. Those looking for ideal weather should visit in January, February, March, and December.
Daytime highs average 30°C (86°F), cooling to 26°C (79°F) at night (daily average: 28°C (82°F)). Peaks reach around 32°C (90°F), the coldest nights around 24°C (75°F). With 5 sunshine hours per day and 20 rain days (546 mm (21.5 in)), this is one of the cloudier months. The water is a warm 30°C (86°F) — perfect for snorkelling and swimming.
An umbrella or waterproof jacket is essential. On rainy days, plan indoor activities like museums and markets.
Packing list for Cambodia (Sihanoukville) in September
- Light summer clothes
- Swimwear and beach towel
- Sunscreen
- Sunglasses
- Rain jacket and waterproof shoes
- Insect repellent
- Travel first-aid kit
Frequently Asked Questions
- Is September a good time to visit Cambodia (Sihanoukville)?
- September is not an optimal month for Cambodia (Sihanoukville) (Score: 49/100), but it is manageable. For better conditions, consider January, February, March, and December.
- How warm is it in Cambodia (Sihanoukville) in September?
- In September, Cambodia (Sihanoukville) sees daily highs of 30°C (86°F). Nights cool to 26°C (79°F), with a daily average of 28°C (82°F). Peaks reach around 32°C (90°F), the coldest nights around 24°C (75°F).
- How much rain falls in Cambodia (Sihanoukville) in September?
- In September, Cambodia (Sihanoukville) receives an average of 546 mm (21.5 in) of rain over 20 rain days. With frequent rain days, waterproof clothing is recommended.
- How many sunshine hours does Cambodia (Sihanoukville) get in September?
- Cambodia (Sihanoukville) averages 5 sunshine hours per day in September — below the annual average.
- How warm is the water in Cambodia (Sihanoukville) in September?
- Water temperature in Cambodia (Sihanoukville) in September averages 30°C (86°F) — ideal for swimming and snorkelling.
