Nai Harn Beach Weather in September
Nai Harn Beach in September sees high temperatures, with highs around 29°C (84°F) and overnight lows of 26°C (79°F). With the rainy season in full effect, expect around 277 mm (11 in) of rainfall and regular showers throughout the month.
Rainfall in Nai Harn Beach in September
As part of the rainy season, Nai Harn Beach sees around 22 days of rain in September, with an average of 277 mm (11 in). With rain on many days and solid totals, showers are frequent and often moderately heavy. Waterproof gear is a sensible idea.
Temperature in Nai Harn Beach in September
In September, Nai Harn Beach gets high temperatures, with highs of 29°C (84°F). Nights cool to around 26°C (79°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With overnight lows of 26°C (79°F), nights stay very warm. Air conditioning makes a real difference if you're sensitive to heat. A cold shower before bed can also help you get to sleep more comfortably.
Sunshine in Nai Harn Beach in September
The area enjoys a moderate level of sunlight, with around 100 hours. It's a good balance between sunny and rainy days.If you prefer dry days with pleasant temperatures, September may not be the ideal month to visit Nai Harn Beach. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Thailand, check out our Nai Harn Beach's climate page.
Nai Harn Beach Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
29°C (84°F)
Chance of Rain
74%
Precipitation
277 mm (11 in)
Rainy days
22 days
Humidity
82% *
Sunshine
100 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Nai Harn Beach typically stay consistent throughout September, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Nai Harn Beach in September
Browse day-by-day weather records for Nai Harn Beach spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Nai Harn Beach historical weather extremes in September
Based on weather observations in Nai Harn Beach between 1976 and 2025, these are the recorded extremes during September.
- The hottest September day on record in Nai Harn Beach reached 39°C (102°F) (September 1, 2010).
- The lowest daytime temperature in September was 25°C (77°F), recorded on September 4, 1994.
- Nai Harn Beach registered its coldest September night on September 23, 2012, with temperatures dropping to 20°C (68°F).
Best Places in Thailand in September
Find out more about the weather in Thailand and which places have the best travel conditions in this month. See all of Thailand in September →
perfect weather
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tolerable
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What to Wear in Nai Harn Beach 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. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Nai Harn Beach in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Thailand, check out our Nai Harn Beach's climate page.
Temperature Rainfall Sunshine Humidity
See the full Nai Harn Beach climate overview or explore weather in Thailand.
