Riau (Batam)
September
Weather in Riau for September 2026
Your guide to Riau weather in September - trends and predictions
In general, the average temperature in Riau at the beginning of September is 29.3 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 29.7 °C by the end of September.
Riau experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 202.3 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
0
Dry days
30
Rainy days
0
Snow days
29°/26°
Temperatures
16 km/h
Avg max wind
75 %
Avg humidity
Riau Weather September
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Temperatures trend during September in Riau
See the weather trend as well as the moving average line
September weather in Riau day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Cloudy | 30° /26° | 3.6 mm | 7 | |
| 2 Sept. |  Patchy rain possible | 29° /25° | 13.8 mm | 7 | |
| 3 Sept. | Light rain shower | 29° /26° | 6 mm | 7 | |
| 4 Sept. | Light rain shower | 29° /26° | 6.4 mm | 7 | |
| 5 Sept. | Light rain shower | 29° /26° | 11.3 mm | 7 | |
| 6 Sept. | Patchy rain possible | 29° /26° | 8.7 mm | 7 | |
| 7 Sept. | Patchy rain possible | 30° /26° | 5.9 mm | 7 | |
| 8 Sept. | Light rain shower | 28° /25° | 6.1 mm | 7 | |
| 9 Sept. | Light rain shower | 29° /25° | 8 mm | 6 | |
| 10 Sept. | Light rain shower | 28° /26° | 6.7 mm | 6 | |
| 11 Sept. | Patchy rain possible | 29° /26° | 7.8 mm | 6 | |
| 12 Sept. | Light rain shower | 28° /26° | 13.3 mm | 6 | |
| 13 Sept. | Patchy rain possible | 27° /24° | 6.5 mm | 6 | |
| 14 Sept. | Patchy rain possible | 29° /25° | 5.6 mm | 7 | |
| 15 Sept. | Patchy rain possible | 29° /25° | 6.2 mm | 7 | |
| 16 Sept. | Patchy rain possible | 30° /26° | 4.7 mm | 7 | |
| 17 Sept. | Patchy rain possible | 28° /25° | 8.6 mm | 6 | |
| 18 Sept. | Light rain shower | 29° /26° | 6.5 mm | 6 | |
| 19 Sept. | Light rain shower | 29° /26° | 5.9 mm | 7 | |
| 20 Sept. | Light rain shower | 30° /26° | 4 mm | 7 | |
| 21 Sept. | Light rain shower | 29° /26° | 4.8 mm | 7 | |
| 22 Sept. | Patchy rain possible | 31° /26° | 0.9 mm | 7 | |
| 23 Sept. | Light rain shower | 31° /26° | 4.4 mm | 7 | |
| 24 Sept. | Light rain shower | 30° /27° | 2.9 mm | 7 | |
| 25 Sept. |  Patchy light drizzle | 30° /25° | 7.3 mm | 7 | |
| 26 Sept. | Light rain shower | 30° /26° | 5.1 mm | 7 | |
| 27 Sept. | Light rain shower | 30° /25° | 5.5 mm | 7 | |
| 28 Sept. | Light rain shower | 30° /26° | 4.2 mm | 7 | |
| 29 Sept. | Light rain shower | 29° /25° | 10.9 mm | 7 | |
| 30 Sept. | Light rain shower | 29° /26° | 10.6 mm | 7 | |
| Next | |||||
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.
Change Month
Riau weather in September vs August vs October
Compare September weather in Riau with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
| August | September | October | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 29°/26° | 29°/26° | 30°/26° |
| Rainfall | 233 mm | 202 mm | 183 mm |
| Wind | 17.4 km/h | 16.2 km/h | 14.7 km/h |
| Humidity | 74% | 75% | 73% |
| Rainy days | 31 days | 30 days | 29 days |
| Dry days | 0 days | 0 days | 2 days |
Planning a trip to Riau? Discover the best time to visit
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 29° and lows near 26°, suitable for diverse activities and preferences.
How much rainfall should be expected in Riau during September?
Significant rainfall exceeding 202.3 mm is expected in Riau during September, occurring over more than 30 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 16 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
September rainfall patterns in Riau
Explore the daily rainfall trends and prepare for Riaus September weather 💧
Typically, Riau has 30 rainy days in September with a total of 202.3 mm of rainfall.
UV exposure in Riau during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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