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Weather in Bangkok for September 2025

Your guide to Bangkok weather in September - trends and predictions
  • In general, the average temperature in Bangkok at the beginning of September is 33 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 31.4 °C by the end of September.

  • Bangkok experiences an exceptionally high level of rainfall in September, with more than 20 rainy days on average.

  • 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
7
Dry days
Average rainy days
23
Rainy days
Average snowy days
0
Snow days
Average temperatures
32°/26°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
72 %
Avg humidity

Bangkok in September average weather

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Temperatures trend during September in Bangkok

See the weather trend as well as the moving average line
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September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Overcast
Overcast
34° /25° 12.8 mm 7
2 Sept. Patchy rain possible
Patchy rain possible
33° /25° 22.1 mm 7
3 Sept. Light rain shower
Light rain shower
33° /25° 8 mm 7
4 Sept. Patchy rain possible
Patchy rain possible
33° /25° 4.4 mm 7
5 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
31° /25° 11.1 mm 7
6 Sept. Light rain shower
Light rain shower
33° /25° 2 mm 7
7 Sept. Overcast
Overcast
34° /25° 2.3 mm 7
8 Sept. Light rain shower
Light rain shower
32° /26° 1 mm 7
9 Sept. Patchy rain possible
Patchy rain possible
32° /25° 1.1 mm 7
10 Sept. Patchy rain possible
Patchy rain possible
33° /26° 1.1 mm 7
11 Sept. Light drizzle
Light drizzle
32° /26° 2 mm 7
12 Sept. Overcast
Overcast
30° /25° 0.9 mm 7
13 Sept. Overcast
Overcast
31° /25° 7 mm 7
14 Sept. Overcast
Overcast
31° /25° 3.7 mm 7
15 Sept. Overcast
Overcast
31° /24° 0.1 mm 7
16 Sept. Light rain shower
Light rain shower
31° /25° 3.1 mm 7
17 Sept. Light rain shower
Light rain shower
32° /25° 3.2 mm 7
18 Sept. Patchy rain possible
Patchy rain possible
30° /25° 6.8 mm 7
19 Sept. Light rain shower
Light rain shower
32° /25° 4.2 mm 7
20 Sept. Cloudy
Cloudy
33° /25° 1 mm 8
21 Sept. Thundery outbreaks possible
Thundery outbreaks possible
33° /26° 4 mm 7
22 Sept. Light rain shower
Light rain shower
32° /26° 3.7 mm 7
23 Sept. Light rain shower
Light rain shower
33° /26° 5.4 mm 7
24 Sept. Light rain shower
Light rain shower
33° /26° 7.6 mm 7
25 Sept. Light rain shower
Light rain shower
31° /25° 13.5 mm 7
26 Sept. Light rain shower
Light rain shower
32° /25° 8.5 mm 7
27 Sept. Light rain shower
Light rain shower
30° /25° 5.2 mm 7
28 Sept. Light rain shower
Light rain shower
31° /25° 7.4 mm 7
29 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
30° /26° 6.4 mm 7
30 Sept. Light rain shower
Light rain shower
33° /25° 9 mm 7
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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.

Guide for Bangkok in September

September in Bangkok, Thailand, is characterized by its monsoon season, bringing heavy rainfall and high humidity. At the beginning of the month, the weather is typically warm and wet. Daytime temperatures generally range from 25° to 32°, with frequent afternoon and evening thunderstorms.

The humidity levels are high, often exceeding 80%, making the air feel even warmer.

As the month progresses, the rainfall continues, but there are occasional breaks in the downpours. The temperatures remain fairly consistent, with daytime highs still hovering around 30° to 32°. Nighttime temperatures are slightly cooler, usually between 24° and 26°.

The humidity remains high throughout the month, contributing to a muggy atmosphere.

By the end of September, the intensity of the monsoon rains may start to decrease slightly, but the weather remains unpredictable. The skies are often overcast, and sudden, heavy showers can occur with little warning.

Despite the rain, there are still periods of sunshine, providing brief respites from the otherwise wet conditions.

Overall, September in Bangkok is a month of warm temperatures and significant rainfall. Visitors should be prepared for wet weather and high humidity, making lightweight, breathable clothing and waterproof gear essential for comfort.

Bangkok in September - FAQ

Is September a good time to visit Bangkok?
You can travel to Bangkok in September, but there are probably better months doing so, read more about the best time to visit Bangkok
What are the expected maximum and minimum temperatures in Bangkok during September?
During September, expect a variety of temperatures with highs around 32° and lows near 26°, suitable for diverse activities and preferences.
How much rainfall should be expected in Bangkok during September?
Significant rainfall exceeding 131 mm is expected in Bangkok during September, occurring over more than 23 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 16 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 ☀️

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Location coordinates Where is Bangkok?

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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