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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 24.4 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 24.1 °C by the end of September.

  • The climate of Bilbao in September is notably wet, with an average of 15 rainy days.

  • 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
15
Dry days
Average rainy days
15
Rainy days
Average snowy days
0
Snow days
Average temperatures
26°/17°
Temperatures
Average wind speed
12 km/h
Avg max wind
Average humidity
72 %
Avg humidity

Bilbao in September average weather

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Temperatures trend during September in Bilbao

See the weather trend as well as the moving average line
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September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Overcast
Overcast
25° /17° 1.6 mm 6
2 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
22° /17° 15.5 mm 5
3 Sept. Partly cloudy
Partly cloudy
22° /16° 2.4 mm 6
4 Sept. Patchy rain possible
Patchy rain possible
26° /18° 9 mm 6
5 Sept. Sunny
Sunny
25° /16° 9.5 mm 6
6 Sept. Patchy rain possible
Patchy rain possible
25° /16° 7.6 mm 6
7 Sept. Patchy rain possible
Patchy rain possible
26° /17° 1.7 mm 6
8 Sept. Patchy rain possible
Patchy rain possible
26° /17° 1.2 mm 7
9 Sept. Patchy light rain with thunder
Patchy light rain with thunder
27° /16° 1.8 mm 6
10 Sept. Patchy rain possible
Patchy rain possible
25° /17° 3.9 mm 6
11 Sept. Light rain shower
Light rain shower
23° /15° 17 mm 6
12 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
20° /15° 13.9 mm 5
13 Sept. Cloudy
Cloudy
20° /14° 1.2 mm 5
14 Sept. Cloudy
Cloudy
22° /13° 0 mm 5
15 Sept. Sunny
Sunny
24° /14° 0 mm 6
16 Sept. Partly cloudy
Partly cloudy
25° /15° 0 mm 7
17 Sept. Patchy light rain
Patchy light rain
24° /15° 1.5 mm 5
18 Sept. Thundery outbreaks possible
Thundery outbreaks possible
24° /15° 0.1 mm 6
19 Sept. Partly cloudy
Partly cloudy
25° /14° 1.6 mm 6
20 Sept. Sunny
Sunny
26° /16° 1.3 mm 6
21 Sept. Light rain shower
Light rain shower
23° /15° 6.3 mm 5
22 Sept. Light rain shower
Light rain shower
19° /14° 4.6 mm 4
23 Sept. Patchy rain possible
Patchy rain possible
21° /12° 0.5 mm 5
24 Sept. Sunny
Sunny
25° /13° 0.1 mm 6
25 Sept. Sunny
Sunny
25° /15° 0.6 mm 7
26 Sept. Cloudy
Cloudy
23° /15° 4 mm 5
27 Sept. Overcast
Overcast
22° /15° 3.5 mm 5
28 Sept. Sunny
Sunny
23° /13° 2.4 mm 6
29 Sept. Patchy rain possible
Patchy rain possible
25° /14° 0 mm 6
30 Sept. Sunny
Sunny
26° /15° 0 mm 6
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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 26° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in Bilbao during September?
Significant rainfall exceeding 121.9 mm is expected in Bilbao during September, occurring over more than 15 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 12 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
    • Lightweight Clothing: T-shirts, blouses, shorts, skirts
    • 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
  • Personal Items
    • Sunscreen: High SPF for sunny destinations
    • Lip Balm with SPF: To protect against chapped lips

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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Location coordinates Where is Bilbao?

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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