September
Weather in Tonga for September 2025
Your guide to Tonga weather in September - trends and predictions
In general, the average temperature in Tonga at the beginning of September is 22 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 22.4 °C by the end of September.
Expect significant rainfall in Tonga during September, with an average of 17 rainy days.
Is September a good time to visit Tonga? check out the best time to travel to Tonga page.
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13
Dry days
17
Rainy days
0
Snow days
22°/22°
Temperatures
35 km/h
Avg max wind
75 %
Avg humidity
Tonga in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  22° | 2 22° | 3 22° | 4 22° | 5  22° | 6  22° | 7 22° |
| 8 22° | 9 22° | 10 23° | 11 23° | 12 22° | 13 23° | 14  22° |
| 15 23° | 16 23° | 17 23° | 18 22° | 19 22° | 20 22° | 21 22° |
| 22  22° | 23 22° | 24 22° | 25 22° | 26 22° | 27 23° | 28 23° |
| 29 23° | 30 22° |
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Temperatures trend during September in Tonga
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. | Patchy rain possible | 22° /21° | 0.5 mm | 6 | |
| 2 Sept. | Patchy rain possible | 22° /21° | 0.3 mm | 6 | |
| 3 Sept. | Patchy rain possible | 22° /21° | 0.1 mm | 6 | |
| 4 Sept. | Patchy rain possible | 22° /21° | 0.1 mm | 6 | |
| 5 Sept. | Partly cloudy | 22° /21° | 0.1 mm | 6 | |
| 6 Sept. | Cloudy | 22° /21° | 0.4 mm | 6 | |
| 7 Sept. | Patchy rain possible | 22° /21° | 0.7 mm | 6 | |
| 8 Sept. | Light rain shower | 22° /21° | 4.2 mm | 6 | |
| 9 Sept. | Light rain shower | 22° /21° | 9 mm | 6 | |
| 10 Sept. | Light rain shower | 23° /21° | 2.7 mm | 6 | |
| 11 Sept. | Light rain shower | 23° /21° | 8.4 mm | 6 | |
| 12 Sept. | Cloudy | 22° /21° | 11.2 mm | 6 | |
| 13 Sept. | Cloudy | 23° /21° | 0.8 mm | 6 | |
| 14 Sept. | Overcast | 22° /22° | 0.2 mm | 6 | |
| 15 Sept. | Cloudy | 23° /22° | 0.1 mm | 6 | |
| 16 Sept. | Light rain shower | 23° /22° | 0.9 mm | 6 | |
| 17 Sept. | Patchy rain possible | 23° /21° | 5.1 mm | 6 | |
| 18 Sept. | Light rain shower | 22° /21° | 1.8 mm | 6 | |
| 19 Sept. | Patchy rain possible | 22° /21° | 0.5 mm | 6 | |
| 20 Sept. | Light rain shower | 22° /20° | 0.9 mm | 6 | |
| 21 Sept. | Light rain shower | 22° /21° | 0.9 mm | 6 | |
| 22 Sept. | Light drizzle | 22° /21° | 0.6 mm | 6 | |
| 23 Sept. | Light rain shower | 22° /21° | 1.2 mm | 6 | |
| 24 Sept. | Light rain shower | 22° /21° | 0.8 mm | 6 | |
| 25 Sept. | Patchy rain possible | 22° /21° | 0.9 mm | 6 | |
| 26 Sept. | Patchy rain possible | 22° /21° | 0 mm | 6 | |
| 27 Sept. | Patchy rain possible | 23° /21° | 0 mm | 6 | |
| 28 Sept. | Partly cloudy | 23° /22° | 0.1 mm | 6 | |
| 29 Sept. | Light rain shower | 23° /21° | 2.9 mm | 6 | |
| 30 Sept. | Cloudy | 22° /20° | 0.4 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Tonga 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 Tonga forecast closer to your planned date for the most up-to-date weather information.
Tonga in September - FAQ
What are the expected maximum and minimum temperatures in Tonga during September?
During September, expect a variety of temperatures with highs around 22° and lows near 22°, suitable for diverse activities and preferences.
How much rainfall should be expected in Tonga during September?
In September, Tonga can expect light to moderate rainfall, totaling 44.3 mm across approximately 17 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Tonga during September?
The average wind speed in Tonga during September is 35 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Tonga in September?
As you prepare for your trip to Tonga 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 Tonga, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Layered Clothing: Light sweaters, long-sleeve shirts, light jackets, and comfortable pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Tonga
Explore the daily rainfall trends and prepare for Tongas September weather 💧
UV exposure in Tonga during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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