Climate averages 1991–2020
Santander weather
in September.
A warm, moderately wet month: the 3rd warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Santander: daytime highs average 22.6°C and nights cool to about 15.3°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 78 mm of rain on roughly 11 days, which makes September a moderately wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 33 min on an average September day.
The nearest other city in this atlas is Barakaldo (69 km away). In September its highs average 21.7°C, 0.9°C cooler than Santander, with 65 mm of rain.
Among the 93 cities listed in Spain, Santander ranks 80th of 93 for the warmest September highs and 79th of 93 for the driest September (rainfall, lowest first). The mean September high of those 93 cities is 25.5°C; Santander is 2.9°C cooler than that mean.
From September to October, average highs fall by 2.7°C to 19.9°C, and monthly rainfall rises from 78 mm to 109 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Santander climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 12.5°C6.1°C | 6.1°C | 115 | 14.7 | 9.49 h |
| February | 13.1°C5.8°C | 5.8°C | 104 | 13.0 | 10.510 h |
| March | 15.3°C7.3°C | 7.3°C | 104 | 12.9 | 11.912 h |
| April | 16.6°C8.8°C | 8.8°C | 103 | 14.8 | 13.413 h |
| May | 19.3°C11.6°C | 11.6°C | 86 | 14.1 | 14.715 h |
| June | 21.8°C14.4°C | 14.4°C | 68 | 10.9 | 15.415 h |
| July | 23.7°C16.5°C | 16.5°C | 54 | 10.3 | 15.115 h |
| August | 24.4°C17.1°C | 17.1°C | 60 | 10.3 | 14.014 h |
| September, selected | 22.6°C15.3°C | 15.3°C | 78 | 11.3 | 12.613 h |
| October | 19.9°C12.9°C | 12.9°C | 109 | 13.3 | 11.111 h |
| November | 15.4°C9.4°C | 9.4°C | 150 | 15.8 | 9.710 h |
| December | 13.3°C7.1°C | 7.1°C | 114 | 13.9 | 9.09 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Barakaldo in SeptemberSpain · 69 kmHigh 21.7°C · Low 15.7°C · 65 mm rain
- Bilbao in SeptemberSpain · 75 kmHigh 21.5°C · Low 15.9°C · 65 mm rain
- Gasteiz / Vitoria in SeptemberSpain · 115 kmHigh 21.9°C · Low 12.2°C · 43 mm rain
- Burgos in SeptemberSpain · 125 kmHigh 22.0°C · Low 11.0°C · 39 mm rain
- Donostia / San Sebastián in SeptemberSpain · 149 kmHigh 21.4°C · Low 15.6°C · 96 mm rain
- Gijón in SeptemberSpain · 150 kmHigh 21.1°C · Low 14.7°C · 81 mm rain
- Logroño in SeptemberSpain · 156 kmHigh 23.3°C · Low 12.9°C · 32 mm rain
- Oviedo in SeptemberSpain · 165 kmHigh 20.6°C · Low 12.2°C · 84 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Santander) is explained once on the Santander year overview and on the Sources, method and limits page.