Guinea-Bissau
September
Weather in Guinea-Bissau for September 2025
Your guide to Guinea-Bissau weather in September - trends and predictions
In general, the average temperature in Guinea-Bissau at the beginning of September is 27.9 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 29.9 °C by the end of September.
Guinea-Bissau experiences an exceptionally high level of rainfall in September, with more than 24 rainy days on average.
Is September a good time to visit Guinea-Bissau? check out the best time to travel to Guinea-Bissau page.
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1
Dry days
29
Rainy days
0
Snow days
29°/22°
Temperatures
11 km/h
Avg max wind
90 %
Avg humidity
Guinea-Bissau in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  25° | 2  30° | 3  29° | 4  28° | 5 28° | 6 27° | 7 28° |
| 8 29° | 9 27° | 10 29° | 11 29° | 12  29° | 13 30° | 14 27° |
| 15 30° | 16 27° | 17 28° | 18 28° | 19 27° | 20 28° | 21 28° |
| 22 26° | 23  30° | 24 32° | 25 29° | 26 27° | 27 30° | 28 29° |
| 29  31° | 30 31° |
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Temperatures trend during September in Guinea-Bissau
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 | 25° /22° | 13.8 mm | 6 | |
| 2 Sept. | Torrential rain shower | 30° /22° | 27.9 mm | 7 | |
| 3 Sept. | Patchy light rain with thunder | 29° /22° | 3.6 mm | 7 | |
| 4 Sept. | Moderate or heavy rain shower | 28° /21° | 18.3 mm | 6 | |
| 5 Sept. | Light rain shower | 28° /22° | 3.4 mm | 7 | |
| 6 Sept. | Moderate or heavy rain shower | 27° /22° | 15.1 mm | 6 | |
| 7 Sept. | Moderate or heavy rain shower | 28° /22° | 9.3 mm | 6 | |
| 8 Sept. | Moderate or heavy rain shower | 29° /21° | 8.2 mm | 7 | |
| 9 Sept. | Moderate or heavy rain shower | 27° /22° | 11.3 mm | 6 | |
| 10 Sept. | Light rain shower | 29° /22° | 28.2 mm | 7 | |
| 11 Sept. | Moderate or heavy rain shower | 29° /22° | 22.7 mm | 7 | |
| 12 Sept. | Fog | 29° /22° | 2.3 mm | 6 | |
| 13 Sept. | Fog | 30° /22° | 10.4 mm | 7 | |
| 14 Sept. | Moderate or heavy rain shower | 27° /22° | 12 mm | 6 | |
| 15 Sept. | Fog | 30° /23° | 17.9 mm | 7 | |
| 16 Sept. | Light rain shower | 27° /21° | 30.5 mm | 6 | |
| 17 Sept. | Moderate or heavy rain shower | 28° /22° | 15.3 mm | 6 | |
| 18 Sept. | Light rain shower | 28° /22° | 8.3 mm | 7 | |
| 19 Sept. | Light rain shower | 27° /22° | 23.9 mm | 6 | |
| 20 Sept. | Light rain shower | 28° /22° | 12 mm | 6 | |
| 21 Sept. | Light rain shower | 28° /22° | 6.7 mm | 6 | |
| 22 Sept. | Light rain shower | 26° /22° | 30.8 mm | 6 | |
| 23 Sept. | Thundery outbreaks possible | 30° /23° | 14.9 mm | 7 | |
| 24 Sept. | Light rain shower | 32° /23° | 12.9 mm | 7 | |
| 25 Sept. | Patchy light rain with thunder | 29° /23° | 18 mm | 7 | |
| 26 Sept. | Moderate rain at times | 27° /22° | 10.2 mm | 6 | |
| 27 Sept. | Moderate or heavy rain shower | 30° /22° | 7.5 mm | 7 | |
| 28 Sept. | Patchy light rain with thunder | 29° /22° | 2.6 mm | 7 | |
| 29 Sept. | Patchy light drizzle | 31° /23° | 1.9 mm | 7 | |
| 30 Sept. | Patchy light rain with thunder | 31° /22° | 1.1 mm | 7 | |
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Important Notice
Our weather forecast for Guinea-Bissau 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 Guinea-Bissau forecast closer to your planned date for the most up-to-date weather information.
Guinea-Bissau in September - FAQ
What are the expected maximum and minimum temperatures in Guinea-Bissau during September?
During September, expect a variety of temperatures with highs around 29° and lows near 22°, suitable for diverse activities and preferences.
How much rainfall should be expected in Guinea-Bissau during September?
Significant rainfall exceeding 406.8 mm is expected in Guinea-Bissau during September, occurring over more than 29 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Guinea-Bissau during September?
The average wind speed in Guinea-Bissau during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Guinea-Bissau in September?
As you prepare for your trip to Guinea-Bissau 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 Guinea-Bissau, 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 Guinea-Bissau
Explore the daily rainfall trends and prepare for Guinea-Bissaus September weather 💧
UV exposure in Guinea-Bissau during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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