Phnom Penh
September
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 heavy rainfall in September, with over 20 rainy days and an average total precipitation 194.4 mm.
Is September a good time to visit Phnom Penh? check out the best time to travel to Phnom Penh page.
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Temperatures
Rain 🌧️
More
2
Dry days
28
Rainy days
0
Snow days
32°/25°
Temperatures
18 km/h
Avg max wind
73 %
Avg humidity
Phnom Penh in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  32° | 2 33° | 3 32° | 4 31° | 5  31° | 6 32° | 7 33° |
| 8 32° | 9 33° | 10  32° | 11 30° | 12  31° | 13 32° | 14 30° |
| 15 32° | 16 34° | 17 32° | 18 31° | 19 32° | 20 33° | 21 32° |
| 22 30° | 23 32° | 24 34° | 25 31° | 26 32° | 27 31° | 28  30° |
| 29 35° | 30 32° |
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Temperatures trend during September in Phnom Penh
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Light rain shower | 32° /25° | 9.9 mm | 7 | |
| 2 Sept. | Light rain shower | 33° /25° | 9.5 mm | 7 | |
| 3 Sept. | Light rain shower | 32° /25° | 4.3 mm | 7 | |
| 4 Sept. | Light rain shower | 31° /25° | 1.7 mm | 7 | |
| 5 Sept. | Moderate or heavy rain shower | 31° /25° | 14.7 mm | 7 | |
| 6 Sept. | Light rain shower | 32° /26° | 4.4 mm | 7 | |
| 7 Sept. | Light rain shower | 33° /25° | 5.4 mm | 7 | |
| 8 Sept. | Moderate or heavy rain shower | 32° /25° | 7.6 mm | 7 | |
| 9 Sept. | Light rain shower | 33° /25° | 15.1 mm | 7 | |
| 10 Sept. | Overcast | 32° /25° | 1 mm | 7 | |
| 11 Sept. | Patchy rain possible | 30° /25° | 6.6 mm | 7 | |
| 12 Sept. | Cloudy | 31° /25° | 5.9 mm | 7 | |
| 13 Sept. | Moderate or heavy rain shower | 32° /25° | 5.3 mm | 7 | |
| 14 Sept. | Overcast | 30° /25° | 0.7 mm | 7 | |
| 15 Sept. | Overcast | 32° /25° | 1.5 mm | 7 | |
| 16 Sept. | Light rain shower | 34° /25° | 0.7 mm | 8 | |
| 17 Sept. | Patchy rain possible | 32° /24° | 5.9 mm | 7 | |
| 18 Sept. | Light rain shower | 31° /25° | 2.8 mm | 7 | |
| 19 Sept. | Patchy rain possible | 32° /25° | 3.2 mm | 7 | |
| 20 Sept. | Light rain shower | 33° /25° | 5.2 mm | 7 | |
| 21 Sept. | Light rain shower | 32° /25° | 8 mm | 7 | |
| 22 Sept. | Light rain shower | 30° /25° | 7.9 mm | 7 | |
| 23 Sept. | Light rain shower | 32° /24° | 8.1 mm | 7 | |
| 24 Sept. | Light rain shower | 34° /25° | 10 mm | 7 | |
| 25 Sept. | Moderate or heavy rain shower | 31° /25° | 14.8 mm | 7 | |
| 26 Sept. | Light rain shower | 32° /24° | 11.4 mm | 7 | |
| 27 Sept. | Light rain shower | 31° /24° | 5.2 mm | 7 | |
| 28 Sept. | Moderate rain | 30° /24° | 10.3 mm | 7 | |
| 29 Sept. | Overcast | 35° /25° | 2.2 mm | 8 | |
| 30 Sept. | 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 194.4 mm is expected in Phnom Penh during September, occurring over more than 28 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 18 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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