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Weather in Bilbao for September 2025

Your guide to Bilbao weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Bilbao is slightly cooler than the historical average by -1.2 °C.

  • Expect cooler weather in the next days in Bilbao with the forecast suggesting a temperature of 21.8 °C, lower than the historical average.

  • In general, the average temperature in Bilbao at the beginning of September is 25.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.7 °C by the end of September.

    • Rain 🌧️

  • Bilbao experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 101.6 mm.

    • More

  • Is September a good time to visit Bilbao? check out the best time to travel to Bilbao page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
2
Dry days
Average rainy days
28
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/16°
Temperatures
Average wind speed
13 km/h
Avg max wind
Average humidity
73 %
Avg humidity

Bilbao Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy rain possible
24°
2
Moderate or heavy rain shower
23°
3
Patchy rain possible
24°
4
Sunny
26°
5
Sunny
27°
6
Patchy rain possible
28°
7
Patchy rain possible
26°
8
Patchy rain possible
24°
9
Patchy rain possible
24°
10
Patchy rain possible
24°
11
Sunny
26°
12
Light rain shower
23°
13
Patchy rain possible
24°
14
Patchy rain possible
25°
15
Patchy rain possible
20°
16
Patchy rain possible
22°
17
Sunny
28°
18
Sunny
32°
19
Sunny
32°
20
Patchy rain possible
24°
21
Patchy rain possible
16°
22
Patchy rain possible
12°
23
Partly cloudy
17°
24
Sunny
20°
25
Partly cloudy
18°
26
Patchy rain possible
19°
27
Partly cloudy
21°
28
Patchy rain possible
24°
29
Patchy rain possible
21°
30
Sunny
22°

Temperatures trend during September in Bilbao

See the weather trend as well as the moving average line

September weather in Bilbao day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Patchy rain possible
Patchy rain possible
 24° /16° 3.5 mm 5
2 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 23° /16° 8.8 mm 5
3 Sept. Patchy rain possible
Patchy rain possible
 24° /16° 1.2 mm 5
4 Sept. Sunny
Sunny
 26° /17° 3.9 mm 6
5 Sept. Sunny
Sunny
 27° /16° 3.8 mm 7
6 Sept. Patchy rain possible
Patchy rain possible
 28° /17° 3.3 mm 6
7 Sept. Patchy rain possible
Patchy rain possible
 26° /18° 0.9 mm 6
8 Sept. Patchy rain possible
Patchy rain possible
 24° /17° 2.6 mm 6
9 Sept. Patchy rain possible
Patchy rain possible
 24° /16° 2.7 mm 5
10 Sept. Patchy rain possible
Patchy rain possible
 24° /16° 2.4 mm 6
11 Sept. Sunny
Sunny
 26° /16° 6.9 mm 6
12 Sept. Light rain shower
Light rain shower
 23° /17° 6.3 mm 6
13 Sept. Patchy rain possible
Patchy rain possible
 24° /17° 1.1 mm 5
14 Sept. Patchy rain possible
Patchy rain possible
 25° /16° 1.2 mm 6
15 Sept. Patchy rain possible
Patchy rain possible
 20° /15° 3.3 mm 0.6
16 Sept. Patchy rain possible
Patchy rain possible
 22° /14° 0.3 mm 1.2
17 Sept. Sunny
Sunny
 28° /14° 0 mm 1.4
18 Sept. Sunny
Sunny
 32° /16° 0 mm 1.4
19 Sept. Sunny
Sunny
 32° /18° 0 mm 1.2
20 Sept. Patchy rain possible
Patchy rain possible
 24° /16° 4.3 mm 5
21 Sept. Patchy rain possible
Patchy rain possible
 16° /13° 1.7 mm 3
22 Sept. Patchy rain possible
Patchy rain possible
 12° /12° 1.2 mm 3
23 Sept. Partly cloudy
Partly cloudy
 17° /8° 0 mm 4
24 Sept. Sunny
Sunny
 20° /9° 0 mm 4
25 Sept. Partly cloudy
Partly cloudy
 18° /11° 0.1 mm 4
26 Sept. Patchy rain possible
Patchy rain possible
 19° /11° 0 mm 3
27 Sept. Partly cloudy
Partly cloudy
 21° /10° 0 mm 4
28 Sept. Patchy rain possible
Patchy rain possible
 24° /13° 2.8 mm 4
29 Sept. Patchy rain possible
Patchy rain possible
 21° /13° 5.8 mm 5
30 Sept. Sunny
Sunny
 22° /14° 3.4 mm 5
Next
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.
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Bilbao weather in September vs August vs October

Compare September weather in Bilbao with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
AugustSeptemberOctober
WeatherPatchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Temperatures24°/17°23°/16°22°/14°
Rainfall65 mm102 mm84 mm
Wind13 km/h13.1 km/h14.7 km/h
Humidity75%73%69%
Rainy days19 days28 days22 days
Dry days12 days2 days9 days

Planning a trip to Bilbao? Discover the best time to visit

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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Get accurate weather forecasts for Bilbao, located at latitude 43.263 and longitude -2.925. Stay updated with localized weather information tailored for Bilbao.

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