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Kep Weather in September
Kep in September sees very high temperatures, with highs around 30°C (86°F) and overnight lows of 26°C (79°F). Rainfall is at its peak this month, around 273 mm (11 in) on average, so waterproofs are essential.
Rainfall in Kep in September
As part of the rainy season, Kep sees around 20 days of rain in September, with an average of 273 mm (11 in). Rainfall this month is frequent and tends to be fairly heavy when it does fall. Packing waterproofs is a good idea.
Temperature in Kep in September
If you're visiting Kep in September, expect highs of 30°C (86°F) and overnight lows around 26°C (79°F). Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. At 26°C (79°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.If you prefer dry days with pleasant temperatures, September may not be the ideal month to visit Kep. Our weather planner can help you explore destinations with more pleasant weather conditions.
Kep Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Chance of Rain
67%
Precipitation
273 mm (11 in)
Rainy days
20 days
Kep Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Kep - and find the best time to visit.
Daily Historical Temperatures
46-year average (1976-2025)
Based on our historical records, temperatures in Kep typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 26°C (79°F).
Average temperatures in September
Daily Historical Precipitation
46-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Kep in September
Browse day-by-day weather records for Kep spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Kep historical weather extremes in September
Based on weather observations in Kep between 1990 and 2026, these are the recorded extremes during September.
- The warmest day in September was on September 24, 2010, with a maximum of 34°C (93°F).
- On September 5, 1990, Kep saw its coldest September day with temperatures maxing out at 24°C (75°F).
- Nighttime temperatures dropped to 19°C (66°F) on September 18, 2020, marking the coldest September night on record.
Best Places in Cambodia in September
Find out more about the weather in Cambodia and which places have the best travel conditions in this month. See all of Cambodia in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Kep in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can.
What To Do in Kep in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Kep 3-Day Forecast
More climate data for Kep
See the full Kep climate overview or explore weather in Cambodia.
Popular in September
Where to go in September - average daytime high across popular destinations.
Battambang
34°C (93°F) Phnom Penh33°C (91°F) Siem Reap33°C (91°F) Kep30°C (86°F) Chambok31°C (88°F) Koh Rong Island29°C (84°F) Kampot30°C (86°F) Sihanoukville29°C (84°F) Bucket list
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