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Pai Weather in September
September in Pai averages 30°C (86°F) during the day and 21°C (70°F) at night. September is part of the rainy season, with around 242 mm (9.5 in) of rainfall and frequent showers.
Rainfall in Pai in September
Pai is in the rainy season in September, with rain on around 20 days and an average of 242 mm (9.5 in). Rain during the rainy season is significant rather than just light drizzle. Expect proper showers on most rainy days.
Temperature in Pai in September
Pai in September gets highs of 30°C (86°F) during the day and drops to 21°C (70°F) at night. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 21°C (70°F) overnight, nights are warm enough to sit outside comfortably in light clothing.If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Pai. Our weather planner can help you explore destinations with more pleasant weather conditions.
Pai Temperature in September
Min Temperature
21°C (70°F)
Max Temperature
30°C (86°F)
Chance of Rain
65%
Precipitation
242 mm (9.5 in)
Rainy days
20 days
Pai Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Pai - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Pai typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 23°C (73°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 records for Pai in September
Browse day-by-day weather records for Pai spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Pai historical weather extremes in September
According to our 50 years of weather records for Pai, the following extremes were recorded between 1976 and 2026.
- On September 24, 1990, temperatures climbed to 39°C (102°F), marking the warmest September day on record.
- Pai experienced its chilliest September day on September 1, 1981, reaching only 25°C (77°F).
- The coldest night in September in Pai was on September 24, 2011, with a minimum of 17°C (63°F).
- Peak precipitation in September occurred on September 4, 2001, when 124 mm (4.9 in) of precipitation was measured.
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
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 Pai in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything!
What To Do in Pai in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Pai 3-Day Forecast
More climate data for Pai
See the full Pai climate overview or explore weather in Thailand.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bangkok
34°C (93°F) Chiang Mai33°C (91°F) Jomtien Beach32°C (90°F) Hua Hin32°C (90°F) Ao Nang Beach30°C (86°F) Koh Samui30°C (86°F) Ko Lanta30°C (86°F) Patong Beach29°C (84°F) Bucket list
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