Udon Thani Weather in September
Thinking of visiting Udon Thani in September? Expect very high temperatures reaching 33°C (91°F) during the day, dropping to 25°C (77°F) at night. Heavy showers are common during the rainy season.
Rainfall in Udon Thani in September
Udon Thani is in the rainy season in September, with rain on around 18 days and an average of 293 mm (12 in). The rain this month falls heavily when it arrives. Late afternoons in particular can see strong showers, so waterproofs are worth keeping handy.
Temperature in Udon Thani in September
September in Udon Thani sees highs of 33°C (91°F) and lows of 25°C (77°F) overnight. The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. At 25°C (77°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.
Sunshine in Udon Thani in September
The month brings about 168 hours of sunlight, offering a comfortable mix of sun and rainy moments.September in Udon Thani has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
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 Udon Thani's climate page.
Udon Thani Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
33°C (91°F)
Chance of Rain
61%
Precipitation
293 mm (12 in)
Rainy days
18 days
Humidity
83% *
Sunshine
168 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Udon Thani typically stay consistent throughout September, with daily highs averaging around 33°C (91°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 Udon Thani in September
Browse day-by-day weather records for Udon Thani spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Udon Thani historical weather extremes in September
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Udon Thani.
- On September 23, 1981, temperatures climbed to 39°C (102°F), marking the warmest September day on record.
- The coldest September day was on September 28, 1997, with a maximum of 26°C (79°F).
- The lowest overnight temperature recorded in September was 21°C (70°F) (September 25, 2019).
- The wettest day in September Udon Thani was on September 14, 2009 with 172 mm (6.8 in) of precipitation.
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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What to Wear in Udon Thani in September
Warm but pleasant conditions in Udon Thani in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Udon Thani 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 Udon Thani's climate page.
Temperature Rainfall Sunshine Humidity
See the full Udon Thani climate overview or explore weather in Thailand.
