Guadalcanal (Malango)
September
Weather in Guadalcanal for September 2025
Your guide to Guadalcanal weather in September - trends and predictions
Until now, September 2025 in Guadalcanal has been nearly identical to the historical average, with a temperature of 29.4 °C (showing only a slight deviation of 0 °C).
The forecast for the next days in Guadalcanal predicts temperatures to be around 29 °C, close to the historical average.
In general, the average temperature in Guadalcanal at the beginning of September is 30 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 28.4 °C by the end of September.
Guadalcanal experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 212.6 mm.
Temperatures
Rain 🌧️
1
Dry days
29
Rainy days
0
Snow days
29°/24°
Temperatures
17 km/h
Avg max wind
81 %
Avg humidity
Guadalcanal Weather September
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Temperatures trend during September in Guadalcanal
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September weather in Guadalcanal day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 30° /24° | 7.8 mm | 7 | |
| 2 Sept. | Patchy rain possible | 30° /24° | 4.9 mm | 7 | |
| 3 Sept. | Patchy rain possible | 30° /24° | 1.7 mm | 7 | |
| 4 Sept. | Light rain shower | 30° /24° | 4.2 mm | 7 | |
| 5 Sept. | Light rain shower | 30° /24° | 7.5 mm | 7 | |
| 6 Sept. | Patchy rain possible | 30° /23° | 1.3 mm | 7 | |
| 7 Sept. | Patchy rain possible | 30° /23° | 2.9 mm | 7 | |
| 8 Sept. | Light rain shower | 29° /23° | 4.5 mm | 7 | |
| 9 Sept. |  Moderate or heavy rain shower | 29° /23° | 15.2 mm | 7 | |
| 10 Sept. | Light rain shower | 29° /24° | 2.8 mm | 7 | |
| 11 Sept. | Light rain shower | 29° /24° | 5.1 mm | 7 | |
| 12 Sept. | Light rain shower | 29° /24° | 4.9 mm | 7 | |
| 13 Sept. |  Overcast | 29° /24° | 8.3 mm | 7 | |
| 14 Sept. | Light rain shower | 28° /24° | 11.1 mm | 7 | |
| 15 Sept. | Overcast | 28° /23° | 2.6 mm | 7 | |
| 16 Sept. |  Moderate rain | 30° /26° | 8 mm | 3 | |
| 17 Sept. | Moderate rain | 29° /25° | 12.9 mm | 2.6 | |
| 18 Sept. | Moderate rain | 29° /25° | 13.6 mm | 2.7 | |
| 19 Sept. | Moderate rain | 29° /25° | 11 mm | 2.8 | |
| 20 Sept. | Moderate rain | 29° /25° | 9.4 mm | 2.8 | |
| 21 Sept. | Moderate rain | 29° /25° | 12.2 mm | 7 | |
| 22 Sept. | Patchy rain possible | 29° /25° | 2.4 mm | 7 | |
| 23 Sept. | Patchy rain possible | 29° /26° | 1.1 mm | 7 | |
| 24 Sept. | Patchy rain possible | 29° /25° | 1.8 mm | 7 | |
| 25 Sept. | Patchy rain possible | 29° /25° | 0.6 mm | 7 | |
| 26 Sept. | Moderate rain | 28° /25° | 5.9 mm | 7 | |
| 27 Sept. | Moderate rain | 27° /25° | 10.3 mm | 7 | |
| 28 Sept. | Patchy rain possible | 28° /25° | 4.6 mm | 7 | |
| 29 Sept. | Patchy rain possible | 29° /25° | 4.9 mm | 7 | |
| 30 Sept. | Light rain shower | 29° /25° | 4.5 mm | 7 | |
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Important Notice
Our weather forecast for Guadalcanal 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 Guadalcanal forecast closer to your planned date for the most up-to-date weather information.
Change Month
Guadalcanal in September - FAQ
What are the expected maximum and minimum temperatures in Guadalcanal during September?
During September, expect a variety of temperatures with highs around 29° and lows near 24°, suitable for diverse activities and preferences.
How much rainfall should be expected in Guadalcanal during September?
Significant rainfall exceeding 212.6 mm is expected in Guadalcanal during September, occurring over more than 29 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Guadalcanal during September?
The average wind speed in Guadalcanal during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Guadalcanal
Explore the daily rainfall trends and prepare for Guadalcanals September weather 💧
UV exposure in Guadalcanal during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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