Weather in Santander for September 2026
- In general, the average temperature in Santander at the beginning of September is 21.9 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 19.9 °C by the end of September. 
- Santander experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 116.8 mm. 
- Is September a good time to visit Santander? check out the best time to travel to Santander page. 
- New! Chat with our AI weatherman - it’s amazing and free. 
Temperatures
Rain 🌧️
More
Santander Weather September
Temperatures trend during September in Santander
September weather in Santander day by day
| Date | Weather | Temperatures | Rain | UV | More | 
|---|---|---|---|---|---|
| 1 Sept. | Patchy rain possible | 21° /16° | 1.5 mm | 5 | |
| 2 Sept. | Moderate or heavy rain shower | 21° /16° | 6.5 mm | 5 | |
| 3 Sept. | Partly cloudy | 22° /17° | 2.3 mm | 5 | |
| 4 Sept. | Patchy rain possible | 22° /18° | 7.8 mm | 5 | |
| 5 Sept. | Sunny | 22° /15° | 6.5 mm | 6 | |
| 6 Sept. | Patchy rain possible | 23° /16° | 2.3 mm | 5 | |
| 7 Sept. | Thundery outbreaks possible | 22° /17° | 1 mm | 5 | |
| 8 Sept. | Partly cloudy | 20° /16° | 3.7 mm | 5 | |
| 9 Sept. | Patchy light rain with thunder | 22° /16° | 1.6 mm | 5 | |
| 10 Sept. | Light rain shower | 21° /16° | 4.4 mm | 4 | |
| 11 Sept. | Thundery outbreaks possible | 21° /16° | 2.9 mm | 5 | |
| 12 Sept. | Light rain shower | 19° /17° | 11.5 mm | 4 | |
| 13 Sept. | Partly cloudy | 19° /15° | 0.7 mm | 5 | |
| 14 Sept. | Partly cloudy | 21° /15° | 0 mm | 5 | |
| 15 Sept. | Thundery outbreaks possible | 21° /16° | 2.6 mm | 5 | |
| 16 Sept. | Patchy rain possible | 22° /15° | 0 mm | 5 | |
| 17 Sept. | Patchy light rain | 21° /16° | 0.6 mm | 5 | |
| 18 Sept. | Light rain shower | 22° /16° | 0.4 mm | 5 | |
| 19 Sept. | Patchy rain possible | 21° /16° | 1.1 mm | 5 | |
| 20 Sept. | Sunny | 21° /16° | 3.6 mm | 5 | |
| 21 Sept. | Light rain shower | 19° /15° | 13 mm | 4 | |
| 22 Sept. | Light rain shower | 18° /15° | 12.7 mm | 4 | |
| 23 Sept. | Patchy rain possible | 18° /13° | 4.1 mm | 4 | |
| 24 Sept. | Sunny | 19° /13° | 0.7 mm | 5 | |
| 25 Sept. | Sunny | 21° /14° | 0 mm | 5 | |
| 26 Sept. | Patchy rain possible | 20° /14° | 10 mm | 5 | |
| 27 Sept. | Overcast | 19° /15° | 2.5 mm | 4 | |
| 28 Sept. | Sunny | 19° /14° | 2.3 mm | 5 | |
| 29 Sept. | Patchy rain possible | 21° /15° | 0.2 mm | 5 | |
| 30 Sept. | Sunny | 20° /15° | 0 mm | 5 | |
| Next | |||||
Santander weather in September vs August vs October
| August | September | October | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible | 
| Temperatures | 22°/18° | 21°/16° | 19°/15° | 
| Rainfall | 74 mm | 117 mm | 130 mm | 
| Wind | 19.6 km/h | 20.4 km/h | 24.3 km/h | 
| Humidity | 77% | 76% | 73% | 
| Rainy days | 18 days | 22 days | 21 days | 
| Dry days | 13 days | 8 days | 10 days | 
Planning a trip to Santander? Discover the best time to visit
Santander in September - FAQ
What to pack to Santander in September?
As you prepare for your trip to Santander 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 Santander, 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 Santander
UV exposure in Santander during September
Quick links
Get accurate weather forecasts for Santander, located at latitude 43.465 and longitude -3.804. Stay updated with localized weather information tailored for Santander.