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Weather in Phnom Penh for September 2025

Your guide to Phnom Penh weather in September - trends and predictions
  • In general, the average temperature in Phnom Penh at the beginning of September is 32 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 32.1 °C by the end of September.

  • Phnom Penh experiences an exceptionally high level of rainfall in September, with more than 24 rainy days on average.

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

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
5
Dry days
Average rainy days
25
Rainy days
Average snowy days
0
Snow days
Average temperatures
32°/25°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
72 %
Avg humidity

Phnom Penh in September average weather

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Temperatures trend during September in Phnom Penh

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. Light rain shower
Light rain shower
32° /25° 9.9 mm 7
2 Sept. Light rain shower
Light rain shower
33° /25° 9.5 mm 7
3 Sept. Light rain shower
Light rain shower
32° /25° 4.3 mm 7
4 Sept. Light rain shower
Light rain shower
31° /25° 1.7 mm 7
5 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
31° /25° 14.7 mm 7
6 Sept. Light rain shower
Light rain shower
32° /26° 4.4 mm 7
7 Sept. Light rain shower
Light rain shower
33° /25° 5.4 mm 7
8 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
32° /25° 7.6 mm 7
9 Sept. Light rain shower
Light rain shower
33° /25° 15.1 mm 7
10 Sept. Overcast
Overcast
32° /25° 1 mm 7
11 Sept. Patchy rain possible
Patchy rain possible
30° /25° 6.6 mm 7
12 Sept. Cloudy
Cloudy
31° /25° 5.9 mm 7
13 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
32° /25° 5.3 mm 7
14 Sept. Overcast
Overcast
30° /25° 0.7 mm 7
15 Sept. Overcast
Overcast
32° /25° 1.5 mm 7
16 Sept. Light rain shower
Light rain shower
34° /25° 0.7 mm 8
17 Sept. Patchy rain possible
Patchy rain possible
32° /24° 5.9 mm 7
18 Sept. Light rain shower
Light rain shower
31° /25° 2.8 mm 7
19 Sept. Patchy rain possible
Patchy rain possible
32° /25° 3.2 mm 7
20 Sept. Light rain shower
Light rain shower
33° /25° 5.2 mm 7
21 Sept. Light rain shower
Light rain shower
32° /25° 8 mm 7
22 Sept. Light rain shower
Light rain shower
30° /25° 7.9 mm 7
23 Sept. Light rain shower
Light rain shower
32° /24° 8.1 mm 7
24 Sept. Light rain shower
Light rain shower
34° /25° 10 mm 7
25 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
31° /25° 14.8 mm 7
26 Sept. Light rain shower
Light rain shower
32° /24° 11.4 mm 7
27 Sept. Light rain shower
Light rain shower
31° /24° 5.2 mm 7
28 Sept. Moderate rain
Moderate rain
30° /24° 10.3 mm 7
29 Sept. Overcast
Overcast
35° /25° 2.2 mm 8
30 Sept. Light rain shower
Light rain shower
32° /26° 5.1 mm 7
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Important Notice
Our weather forecast for Phnom Penh 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 Phnom Penh forecast closer to your planned date for the most up-to-date weather information.

Phnom Penh in September - FAQ

What are the expected maximum and minimum temperatures in Phnom Penh during September?
During September, expect a variety of temperatures with highs around 32° and lows near 25°, suitable for diverse activities and preferences.
How much rainfall should be expected in Phnom Penh during September?
Significant rainfall exceeding 250.9 mm is expected in Phnom Penh during September, occurring over more than 25 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Phnom Penh during September?
The average wind speed in Phnom Penh during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Phnom Penh in September?

As you prepare for your trip to Phnom Penh 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 Phnom Penh, 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 Phnom Penh

Explore the daily rainfall trends and prepare for Phnom Penhs September weather 💧

UV exposure in Phnom Penh during September

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

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Location coordinates Where is Phnom Penh?

Get accurate weather forecasts for Phnom Penh, located at latitude 11.562 and longitude 104.916. Stay updated with localized weather information tailored for Phnom Penh.

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