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Thailand weather

Weather in Bangkok for September 2025

Your guide to Bangkok weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Bangkok has been nearly identical to the historical average, with a temperature of 31.7 °C (showing only a slight deviation of 0 °C).

  • Expect cooler weather in the next days in Bangkok with the forecast suggesting a temperature of 29.9 °C, lower than the historical average.

  • In general, the average temperature in Bangkok at the beginning of September is 32.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 28.6 °C by the end of September.

    • Rain 🌧️

  • Bangkok experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 245.3 mm.

    • More

  • Is September a good time to visit Bangkok? check out the best time to travel to Bangkok page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
0
Dry days
Average rainy days
30
Rainy days
Average snowy days
0
Snow days
Average temperatures
31°/25°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
76 %
Avg humidity

Bangkok Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Moderate or heavy rain shower
33°
2
Moderate or heavy rain shower
33°
3
Heavy rain at times
32°
4
Light rain shower
32°
5
Patchy rain possible
31°
6
Patchy rain possible
33°
7
Moderate or heavy rain shower
31°
8
Moderate or heavy rain shower
30°
9
Patchy rain possible
31°
10
Patchy rain possible
32°
11
Patchy rain possible
31°
12
Overcast
31°
13
Moderate or heavy rain shower
32°
14
Moderate or heavy rain shower
32°
15
Heavy rain at times
31°
16
Moderate rain
33°
17
Moderate rain
34°
18
Moderate rain
32°
19
Moderate rain
30°
20
Moderate rain
29°
21
Patchy rain possible
30°
22
Patchy rain possible
32°
23
Patchy rain possible
30°
24
Patchy rain possible
29°
25
Patchy rain possible
25°
26
Patchy rain possible
29°
27
Patchy rain possible
26°
28
Partly cloudy
27°
29
Patchy rain possible
32°
30
Heavy rain at times
32°

Temperatures trend during September in Bangkok

See the weather trend as well as the moving average line

September weather in Bangkok day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 33° /25° 9.4 mm 7
2 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 33° /25° 11.1 mm 7
3 Sept. Heavy rain at times
Heavy rain at times
 32° /25° 5.4 mm 7
4 Sept. Light rain shower
Light rain shower
 32° /24° 5 mm 7
5 Sept. Patchy rain possible
Patchy rain possible
 31° /24° 6.3 mm 7
6 Sept. Patchy rain possible
Patchy rain possible
 33° /25° 8 mm 7
7 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 31° /24° 14.3 mm 7
8 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /24° 18.3 mm 7
9 Sept. Patchy rain possible
Patchy rain possible
 31° /24° 8.9 mm 7
10 Sept. Patchy rain possible
Patchy rain possible
 32° /25° 6.9 mm 7
11 Sept. Patchy rain possible
Patchy rain possible
 31° /25° 2.7 mm 7
12 Sept. Overcast
Overcast
 31° /25° 3.3 mm 7
13 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 32° /25° 9.1 mm 7
14 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 32° /25° 7.2 mm 7
15 Sept. Heavy rain at times
Heavy rain at times
 31° /25° 4.7 mm 7
16 Sept. Moderate rain
Moderate rain
 33° /26° 7.3 mm 2.7
17 Sept. Moderate rain
Moderate rain
 34° /26° 5.2 mm 2.7
18 Sept. Moderate rain
Moderate rain
 32° /26° 9 mm 2
19 Sept. Moderate rain
Moderate rain
 30° /26° 5.1 mm 1.3
20 Sept. Moderate rain
Moderate rain
 29° /26° 5.9 mm 1.8
21 Sept. Patchy rain possible
Patchy rain possible
 30° /26° 1.6 mm 6
22 Sept. Patchy rain possible
Patchy rain possible
 32° /26° 0.1 mm 6
23 Sept. Patchy rain possible
Patchy rain possible
 30° /26° 1.3 mm 6
24 Sept. Patchy rain possible
Patchy rain possible
 29° /25° 1.6 mm 6
25 Sept. Patchy rain possible
Patchy rain possible
 25° /24° 4.7 mm 5
26 Sept. Patchy rain possible
Patchy rain possible
 29° /25° 1.8 mm 6
27 Sept. Patchy rain possible
Patchy rain possible
 26° /25° 0.5 mm 6
28 Sept. Partly cloudy
Partly cloudy
 27° /24° 0 mm 7
29 Sept. Patchy rain possible
Patchy rain possible
 32° /23° 3 mm 6
30 Sept. Heavy rain at times
Heavy rain at times
 32° /25° 6.6 mm 7
Next
Important Notice
Our weather forecast for Bangkok in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Bangkok forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Bangkok weather in September vs August vs October

Compare September weather in Bangkok with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
AugustSeptemberOctober
WeatherPatchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Temperatures32°/26°31°/25°30°/25°
Rainfall135 mm245 mm250 mm
Wind15.9 km/h13.9 km/h10.9 km/h
Humidity68%76%77%
Rainy days31 days30 days31 days
Dry days0 days0 days0 days

Planning a trip to Bangkok? Discover the best time to visit

Bangkok in September - FAQ

What are the expected maximum and minimum temperatures in Bangkok during September?
During September, expect a variety of temperatures with highs around 31° and lows near 25°, suitable for diverse activities and preferences.
How much rainfall should be expected in Bangkok during September?
Significant rainfall exceeding 245.3 mm is expected in Bangkok during September, occurring over more than 30 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Bangkok during September?
The average wind speed in Bangkok during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Bangkok in September?

As you prepare for your trip to Bangkok in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Bangkok, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Lightweight Clothing: T-shirts, blouses, shorts, skirts
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
    • Sandals/Flip-flops: Comfortable for warm climates
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Umbrellas/Raincoats: For rainy days
  • Personal Items
    • Sunscreen: High SPF for sunny destinations
    • Lip Balm with SPF: To protect against chapped lips
    • Insect Repellent: For destinations with mosquitos or other insects

September rainfall patterns in Bangkok

Explore the daily rainfall trends and prepare for Bangkoks September weather 💧

UV exposure in Bangkok during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

Quick links

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Get accurate weather forecasts for Bangkok, located at latitude 13.754 and longitude 100.501. Stay updated with localized weather information tailored for Bangkok.

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