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Weather in Gipuzkoa for September 2025

Your guide to Gipuzkoa weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Yellow High Temperature Warning - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Gipuzkoa has been nearly identical to the historical average, with a temperature of 22.6 °C (showing only a slight deviation of -0.4 °C).

  • Expect cooler weather in the next days in Gipuzkoa with the forecast suggesting a temperature of 21.3 °C, lower than the historical average.

  • In general, the average temperature in Gipuzkoa at the beginning of September is 24.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.7 °C by the end of September.

    • Rain 🌧️

  • Gipuzkoa experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 171 mm.

    • More

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

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

Average dry days
9
Dry days
Average rainy days
21
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/15°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
76 %
Avg humidity

Gipuzkoa Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy light rain with thunder
22°
2
Moderate or heavy rain shower
23°
3
Cloudy
25°
4
Light rain shower
24°
5
Partly cloudy
24°
6
Sunny
26°
7
Partly cloudy
26°
8
Patchy rain possible
23°
9
Light rain shower
23°
10
Patchy rain possible
22°
11
Moderate or heavy rain shower
23°
12
Cloudy
20°
13
Light rain shower
19°
14
Cloudy
22°
15
Sunny
22°
16
Weather Alert Patchy rain possible
22°
17
Weather Alert Sunny
26°
18
Weather Alert Sunny
34°
19
Patchy rain possible
33°
20
Moderate rain
22°
21
Patchy rain possible
17°
22
Patchy rain possible
14°
23
Moderate rain
16°
24
Patchy rain possible
17°
25
Partly cloudy
17°
26
Sunny
18°
27
Overcast
19°
28
Sunny
23°
29
Patchy rain possible
20°
30
Sunny
24°

Temperatures trend during September in Gipuzkoa

See the weather trend as well as the moving average line

September weather in Gipuzkoa day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 22° /15° 7 mm 5
2 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 23° /16° 20.3 mm 5
3 Sept. Cloudy
Cloudy
 25° /16° 3.2 mm 5
4 Sept. Light rain shower
Light rain shower
 24° /17° 3.9 mm 6
5 Sept. Partly cloudy
Partly cloudy
 24° /15° 2.5 mm 6
6 Sept. Sunny
Sunny
 26° /16° 12.2 mm 7
7 Sept. Partly cloudy
Partly cloudy
 26° /17° 1.2 mm 7
8 Sept. Patchy rain possible
Patchy rain possible
 23° /15° 4.9 mm 5
9 Sept. Light rain shower
Light rain shower
 23° /15° 2.9 mm 5
10 Sept. Patchy rain possible
Patchy rain possible
 22° /15° 3.2 mm 5
11 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 23° /15° 19.6 mm 5
12 Sept. Cloudy
Cloudy
 20° /15° 11.6 mm 4
13 Sept. Light rain shower
Light rain shower
 19° /14° 1.7 mm 4
14 Sept. Cloudy
Cloudy
 22° /13° 0 mm 5
15 Sept. Sunny
Sunny
 22° /14° 0.8 mm 6
16 Sept. Patchy rain possible
Patchy rain possible
 22° /16° 0.4 mm 1.3
17 Sept. Sunny
Sunny
 26° /15° 0 mm 1.4
18 Sept. Sunny
Sunny
 34° /14° 0 mm 1.4
19 Sept. Patchy rain possible
Patchy rain possible
 33° /18° 0.5 mm 1.1
20 Sept. Moderate rain
Moderate rain
 22° /15° 5.7 mm 0.4
21 Sept. Patchy rain possible
Patchy rain possible
 17° /12° 3 mm 3
22 Sept. Patchy rain possible
Patchy rain possible
 14° /11° 1.1 mm 3
23 Sept. Moderate rain
Moderate rain
 16° /11° 5.1 mm 3
24 Sept. Patchy rain possible
Patchy rain possible
 17° /13° 0.6 mm 3
25 Sept. Partly cloudy
Partly cloudy
 17° /9° 0.1 mm 4
26 Sept. Sunny
Sunny
 18° /7° 0 mm 4
27 Sept. Overcast
Overcast
 19° /8° 0 mm 3
28 Sept. Sunny
Sunny
 23° /11° 0 mm 5
29 Sept. Patchy rain possible
Patchy rain possible
 20° /12° 0.2 mm 4
30 Sept. Sunny
Sunny
 24° /14° 0 mm 7
Next
Important Notice
Our weather forecast for Gipuzkoa 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 Gipuzkoa forecast closer to your planned date for the most up-to-date weather information.
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Gipuzkoa weather in September vs August vs October

Compare September weather in Gipuzkoa 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
Temperatures23°/16°22°/15°20°/13°
Rainfall136 mm171 mm131 mm
Wind13.7 km/h14.5 km/h17.7 km/h
Humidity79%76%74%
Rainy days19 days21 days20 days
Dry days12 days9 days11 days

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

Gipuzkoa in September - FAQ

What are the expected maximum and minimum temperatures in Gipuzkoa during September?
During September, expect a variety of temperatures with highs around 22° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Gipuzkoa during September?
Significant rainfall exceeding 171 mm is expected in Gipuzkoa during September, occurring over more than 21 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Gipuzkoa during September?
The average wind speed in Gipuzkoa during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Gipuzkoa in September?

As you prepare for your trip to Gipuzkoa 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 Gipuzkoa, 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 Gipuzkoa

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

UV exposure in Gipuzkoa during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Gipuzkoa
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Donostia / San Sebastián
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Location coordinates Where is Gipuzkoa?

Get accurate weather forecasts for Gipuzkoa, located at latitude 43.313 and longitude -1.975. Stay updated with localized weather information tailored for Gipuzkoa.

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