Bilbao
September
Weather in Bilbao for September 2025
Your guide to Bilbao weather in September - trends and predictions
In general, the average temperature in Bilbao at the beginning of September is 25.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.9 °C by the end of September.
Bilbao experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 101.6 mm.
Is September a good time to visit Bilbao? check out the best time to travel to Bilbao page.
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Temperatures
Rain 🌧️
More
2
Dry days
28
Rainy days
0
Snow days
23°/16°
Temperatures
13 km/h
Avg max wind
73 %
Avg humidity
Bilbao in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  24° | 2  22° | 3 23° | 4  27° | 5 27° | 6 27° | 7 27° |
| 8 26° | 9 25° | 10 25° | 11 26° | 12  24° | 13 25° | 14  24° |
| 15 23° | 16 23° | 17 22° | 18 22° | 19 23° | 20 23° | 21 22° |
| 22 21° | 23 21° | 24  23° | 25 23° | 26 22° | 27 21° | 28 21° |
| 29 21° | 30 22° |
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Temperatures trend during September in Bilbao
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 | 24° /17° | 4.1 mm | 5 | |
| 2 Sept. | Moderate or heavy rain shower | 22° /16° | 11 mm | 5 | |
| 3 Sept. | Patchy rain possible | 23° /16° | 1.4 mm | 5 | |
| 4 Sept. | Sunny | 27° /17° | 4.5 mm | 7 | |
| 5 Sept. | Sunny | 27° /16° | 4.7 mm | 7 | |
| 6 Sept. | Patchy rain possible | 27° /17° | 4.1 mm | 6 | |
| 7 Sept. | Patchy rain possible | 27° /18° | 1 mm | 6 | |
| 8 Sept. | Patchy rain possible | 26° /17° | 0.8 mm | 6 | |
| 9 Sept. | Patchy rain possible | 25° /17° | 2.9 mm | 6 | |
| 10 Sept. | Patchy rain possible | 25° /16° | 2.8 mm | 6 | |
| 11 Sept. | Sunny | 26° /16° | 8.5 mm | 6 | |
| 12 Sept. | Partly cloudy | 24° /17° | 7 mm | 6 | |
| 13 Sept. | Patchy rain possible | 25° /17° | 1.4 mm | 6 | |
| 14 Sept. | Heavy rain at times | 24° /16° | 1.5 mm | 6 | |
| 15 Sept. | Sunny | 23° /16° | 3.1 mm | 6 | |
| 16 Sept. | Partly cloudy | 23° /15° | 2 mm | 6 | |
| 17 Sept. | Partly cloudy | 22° /15° | 1.2 mm | 5 | |
| 18 Sept. | Heavy rain at times | 22° /15° | 2.3 mm | 6 | |
| 19 Sept. | Patchy rain possible | 23° /14° | 1.1 mm | 6 | |
| 20 Sept. | Sunny | 23° /14° | 3.7 mm | 6 | |
| 21 Sept. | Heavy rain at times | 22° /14° | 5.6 mm | 5 | |
| 22 Sept. | Light rain shower | 21° /13° | 3.3 mm | 5 | |
| 23 Sept. | Patchy rain possible | 21° /13° | 0.3 mm | 5 | |
| 24 Sept. | Cloudy | 23° /14° | 2.8 mm | 5 | |
| 25 Sept. | Moderate rain at times | 23° /14° | 1.6 mm | 6 | |
| 26 Sept. | Cloudy | 22° /14° | 2.6 mm | 5 | |
| 27 Sept. | Patchy rain possible | 21° /15° | 3.8 mm | 5 | |
| 28 Sept. | Patchy rain possible | 21° /14° | 3.3 mm | 5 | |
| 29 Sept. | Patchy rain possible | 21° /13° | 5.8 mm | 5 | |
| 30 Sept. | Sunny | 22° /14° | 3.4 mm | 5 | |
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Important Notice
Our weather forecast for Bilbao 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 Bilbao forecast closer to your planned date for the most up-to-date weather information.
Bilbao in September - FAQ
What are the expected maximum and minimum temperatures in Bilbao during September?
During September, expect a variety of temperatures with highs around 23° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Bilbao during September?
Significant rainfall exceeding 101.6 mm is expected in Bilbao during September, occurring over more than 28 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Bilbao during September?
The average wind speed in Bilbao during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Bilbao in September?
As you prepare for your trip to Bilbao 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 Bilbao, 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 Bilbao
Explore the daily rainfall trends and prepare for Bilbaos September weather 💧
UV exposure in Bilbao during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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