Riau (Batam)
September
Weather in Riau for September 2025
Your guide to Riau weather in September - trends and predictions
In general, the average temperature in Riau at the beginning of September is 30.1 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 29.9 °C by the end of September.
Riau experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 176.3 mm.
Is September a good time to visit Riau? check out the best time to travel to Riau page.
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Temperatures
Rain 🌧️
More
3
Dry days
27
Rainy days
0
Snow days
30°/26°
Temperatures
15 km/h
Avg max wind
74 %
Avg humidity
Riau in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  30° | 2  31° | 3 30° | 4 30° | 5 30° | 6 30° | 7 30° |
| 8 30° | 9 29° | 10 27° | 11 29° | 12 28° | 13 29° | 14 30° |
| 15 30° | 16 30° | 17 29° | 18 29° | 19 28° | 20 30° | 21 27° |
| 22 31° | 23 30° | 24 30° | 25  30° | 26 29° | 27 29° | 28 30° |
| 29 31° | 30 30° |
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Temperatures trend during September in Riau
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. | Cloudy | 30° /27° | 0 mm | 7 | |
| 2 Sept. | Patchy rain possible | 31° /26° | 5.1 mm | 7 | |
| 3 Sept. | Light rain shower | 30° /27° | 7 mm | 7 | |
| 4 Sept. | Light rain shower | 30° /27° | 2.1 mm | 7 | |
| 5 Sept. | Light rain shower | 30° /26° | 8.6 mm | 7 | |
| 6 Sept. | Patchy rain possible | 30° /27° | 4.1 mm | 7 | |
| 7 Sept. | Patchy rain possible | 30° /27° | 7.6 mm | 7 | |
| 8 Sept. | Light rain shower | 30° /27° | 6.1 mm | 7 | |
| 9 Sept. | Light rain shower | 29° /25° | 14.4 mm | 6 | |
| 10 Sept. | Light rain shower | 27° /26° | 10.5 mm | 6 | |
| 11 Sept. | Patchy rain possible | 29° /26° | 0.4 mm | 6 | |
| 12 Sept. | Light rain shower | 28° /27° | 6.3 mm | 6 | |
| 13 Sept. | Patchy rain possible | 29° /25° | 0.9 mm | 6 | |
| 14 Sept. | Patchy rain possible | 30° /26° | 2.7 mm | 7 | |
| 15 Sept. | Patchy rain possible | 30° /26° | 5.7 mm | 7 | |
| 16 Sept. | Patchy rain possible | 30° /26° | 5.6 mm | 7 | |
| 17 Sept. | Patchy rain possible | 29° /26° | 4.9 mm | 6 | |
| 18 Sept. | Light rain shower | 29° /26° | 9.8 mm | 6 | |
| 19 Sept. | Light rain shower | 28° /26° | 6.9 mm | 6 | |
| 20 Sept. | Light rain shower | 30° /26° | 6 mm | 7 | |
| 21 Sept. | Light rain shower | 27° /26° | 9.1 mm | 6 | |
| 22 Sept. | Patchy rain possible | 31° /26° | 1.2 mm | 7 | |
| 23 Sept. | Light rain shower | 30° /27° | 5.1 mm | 7 | |
| 24 Sept. | Light rain shower | 30° /27° | 5.7 mm | 7 | |
| 25 Sept. | Patchy light drizzle | 30° /25° | 11.3 mm | 7 | |
| 26 Sept. | Light rain shower | 29° /26° | 8.8 mm | 6 | |
| 27 Sept. | Light rain shower | 29° /25° | 7 mm | 6 | |
| 28 Sept. | Light rain shower | 30° /27° | 4.2 mm | 7 | |
| 29 Sept. | Light rain shower | 31° /27° | 3.5 mm | 7 | |
| 30 Sept. | Light rain shower | 30° /27° | 5.8 mm | 7 | |
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Important Notice
Our weather forecast for Riau 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 Riau forecast closer to your planned date for the most up-to-date weather information.
Riau in September - FAQ
What are the expected maximum and minimum temperatures in Riau during September?
During September, expect a variety of temperatures with highs around 30° and lows near 26°, suitable for diverse activities and preferences.
How much rainfall should be expected in Riau during September?
Significant rainfall exceeding 176.3 mm is expected in Riau during September, occurring over more than 27 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Riau during September?
The average wind speed in Riau during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Riau in September?
As you prepare for your trip to Riau 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 Riau, 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 Riau
Explore the daily rainfall trends and prepare for Riaus September weather 💧
UV exposure in Riau during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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