Valle de San José Weather in September
What's the weather like in Valle de San José (Santander) in September 2025?
The climate in Valle de San José during September can be summarized as warm and very wet.
September is in the fall / autumn in Valle de San José and is typically the 4th coldest month of the year. Daytime maximum temperatures average around 25°C (76°F), whilst at night 14°C (58°F) is normal.
| Daytime temperature | 24.5°C 76°F |
|---|---|
| Nightly temperature | 14.2°C 57.5°F |
| Average temperature | 19.3°C 66.7°F |
| Daily sunshine | 5.1 hrs |
| Avg rainfall | 249 mm 9.8 ins |
| Rainy days | 19 days |
| Sea temperature | 28°C 82.5°F |
| Humidity | 81% |
| Windspeed | 11.2kph 7 mph |
On average September is the 5th wettest month of the year in Valle de San José with around 249mm 9.8 inches of rain making it a very wet time to visit. This rainfall is typically spread over 19 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.1 hours of sunshine per day.
September temperatures in Valle de San José
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Valle de San José in September 2025.
Other monthly averages
Best places to visit in September
Valle de San José weather stats
| Hottest month: | March | 25.6°C 78.1°F |
|---|---|---|
| Driest month: | January | 105mm 4.1ins |
| Sunniest month: | January | 7.7hrs |
| Coldest month: | July | 23.8°C 74.8°F |
| Wettest month: | October | 370mm 14.6ins |
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