Click on a day for an hourly weather forecast
The temperatures in Santander in September are comfortable with low of 17°C and and high up to 21°C.
You can expect a few rainy days in Santander during September, but usually the weather is comfortable in September.
Our weather forecast can give you a great sense of what weather to expect in Santander in September 2025.
If you’re planning to visit Santander in the near future, we highly recommend that you review the 14 day weather forecast for Santander before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 12° / 9° | 7 | 24 | 0 | 110 mm | Bad | Santander in January |
| February | 12° / 9° | 7 | 20 | 1 | 112 mm | Bad | Santander in February |
| March | 13° / 9° | 5 | 26 | 0 | 71 mm | Ok | Santander in March |
| April | 15° / 11° | 4 | 26 | 0 | 55 mm | Good | Santander in April |
| May | 16° / 12° | 4 | 27 | 0 | 52 mm | Good | Santander in May |
| June | 19° / 15° | 4 | 26 | 0 | 66 mm | Good | Santander in June |
| July | 21° / 17° | 2 | 29 | 0 | 35 mm | Good | Santander in July |
| August | 22° / 18° | 2 | 29 | 0 | 34 mm | Good | Santander in August |
| September | 21° / 17° | 2 | 28 | 0 | 41 mm | Good | Santander in September |
| October | 19° / 15° | 3 | 28 | 0 | 74 mm | Good | Santander in October |
| November | 15° / 12° | 7 | 23 | 0 | 111 mm | Ok | Santander in November |
| December | 13° / 10° | 5 | 26 | 0 | 80 mm | Ok | Santander in December |