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Weather in Bizkaia for September 2025

Your guide to Bizkaia weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Yellow High Temperature Warning - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Bizkaia is slightly cooler than the historical average by -1 °C.

  • Expect cooler weather in the next days in Bizkaia with the forecast suggesting a temperature of 21.7 °C, lower than the historical average.

  • In general, the average temperature in Bizkaia at the beginning of September is 25.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.7 °C by the end of September.

    • Rain 🌧️

  • Bizkaia 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 Bizkaia? check out the best time to travel to Bizkaia 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

Bizkaia 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
Sunny
23°
16
Weather Alert Patchy rain possible
23°
17
Weather Alert Sunny
27°
18
Weather Alert Sunny
37°
19
Patchy rain possible
33°
20
Patchy rain possible
24°
21
Patchy rain possible
15°
22
Patchy rain possible
15°
23
Patchy rain possible
14°
24
Patchy rain possible
17°
25
Cloudy
17°
26
Sunny
18°
27
Overcast
19°
28
Sunny
24°
29
Partly cloudy
21°
30
Sunny
22°

Temperatures trend during September in Bizkaia

See the weather trend as well as the moving average line

September weather in Bizkaia 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. Sunny
Sunny
 23° /16° 3 mm 5
16 Sept. Patchy rain possible
Patchy rain possible
 23° /15° 0.3 mm 1.3
17 Sept. Sunny
Sunny
 27° /14° 0 mm 1.4
18 Sept. Sunny
Sunny
 37° /15° 0 mm 1.4
19 Sept. Patchy rain possible
Patchy rain possible
 33° /20° 0.2 mm 0.9
20 Sept. Patchy rain possible
Patchy rain possible
 24° /15° 3 mm 0.5
21 Sept. Patchy rain possible
Patchy rain possible
 15° /13° 1.4 mm 3
22 Sept. Patchy rain possible
Patchy rain possible
 15° /11° 0.7 mm 3
23 Sept. Patchy rain possible
Patchy rain possible
 14° /10° 2.4 mm 3
24 Sept. Patchy rain possible
Patchy rain possible
 17° /11° 0.2 mm 3
25 Sept. Cloudy
Cloudy
 17° /10° 0 mm 3
26 Sept. Sunny
Sunny
 18° /8° 0 mm 4
27 Sept. Overcast
Overcast
 19° /9° 0 mm 3
28 Sept. Sunny
Sunny
 24° /11° 0 mm 5
29 Sept. Partly cloudy
Partly cloudy
 21° /12° 0 mm 5
30 Sept. Sunny
Sunny
 22° /14° 3.4 mm 5
Next
Important Notice
Our weather forecast for Bizkaia 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 Bizkaia forecast closer to your planned date for the most up-to-date weather information.
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Bizkaia weather in September vs August vs October

Compare September weather in Bizkaia 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 Bizkaia? Discover the best time to visit

Bizkaia in September - FAQ

What are the expected maximum and minimum temperatures in Bizkaia 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 Bizkaia during September?
Significant rainfall exceeding 101.6 mm is expected in Bizkaia during September, occurring over more than 28 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Bizkaia during September?
The average wind speed in Bizkaia during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Bizkaia in September?

As you prepare for your trip to Bizkaia 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 Bizkaia, 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 Bizkaia

Explore the daily rainfall trends and prepare for Bizkaias September weather 💧

UV exposure in Bizkaia during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is Bizkaia?

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

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