September weather forecastCastro Urdiales, Spain
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Castro Urdiales, Spain, with an average temperature fluctuating between 21.5°C (70.7°F) and 15.9°C (60.6°F).Temperature
The transition into September marks the average high-temperature at an agreeable 21.5°C (70.7°F), differing minimally from August's 23°C (73.4°F). During September, Castro Urdiales records an average temperature of 15.9°C (60.6°F) at night.Humidity
In Castro Urdiales, the average relative humidity in September is 74%.Rainfall
In September, in Castro Urdiales, the rain falls for 15.3 days. Throughout September, 40mm (1.57") of precipitation is accumulated. In Castro Urdiales, during the entire year, the rain falls for 207.3 days and collects up to 710mm (27.95") of precipitation.Snowfall
In Castro Urdiales, snow does not fall in April through November.Sea temperature
In Castro Urdiales, in September, the average water temperature is 20.6°C (69.1°F).Note: Most people find it challenging to enjoy swimming in water that is 20.6°C (69.1°F). As water temperature falls below 21°C (69.8°F), controlling breathing grows increasingly difficult.
Daylight
In Castro Urdiales, the average length of the day in September is 12h and 30min.On the first day of September in Castro Urdiales, sunrise is at 07:37 and sunset at 20:47. On the last day of the month, sunrise is at 08:09 and sunset at 19:55 CEST.
Sunshine
In Castro Urdiales, the average sunshine in September is 8.3h.UV index
The months with the highest UV index in Castro Urdiales are May through September, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: The UV index of 5 during September translates into the following guidance:
Ensure safety - Imperative it is to shield skin and eyes from damage. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Castro Urdiales, Spain
- Average high temperature in September: 21.5°C
The warmest month (with the highest average high temperature) is August (23°C).
The month with the lowest average high temperature is January (10.8°C).
- Average low temperature in September: 15.9°C
The month with the highest average low temperature is August (17.3°C).
The coldest month (with the lowest average low temperature) is February (7.1°C).
Average pressure in September
Castro Urdiales, Spain
- Average pressure in September: 1018.4mbar
The month with the highest atmospheric pressure is December (1021.7mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).
Average wind speed in September
Castro Urdiales, Spain
- Average wind speed in September: 11.3km/h
The windiest month (with the highest average wind speed) is February (17.8km/h).
The calmest month (with the lowest average wind speed) is August (10.3km/h).
Average humidity in September
Castro Urdiales, Spain
- Average humidity in September: 74%
The month with the highest relative humidity is June (79%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Castro Urdiales, Spain
- Average rainfall in September: 40mm
The wettest month (with the highest rainfall) is November (115mm).
The driest months (with the least rainfall) are July and August (36mm).
Average rainfall days in September
Castro Urdiales, Spain
- Average rainfall days in September: 15.3 days
The month with the highest number of rainy days is November (19.7 days).
The month with the least rainy days is October (14.5 days).
Average snowfall in September
Castro Urdiales, Spain
- Average snowfall in September: 0mm
The month with the highest snowfall is February (23mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Castro Urdiales, Spain
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature in September
Castro Urdiales, Spain
- Average sea temperature in September: 20.6°C
The best month for swimming (with the highest average sea temperature) is August (21.2°C).
The coldest month (with the lowest average sea temperature) is February (12.7°C).
Average daylight in September /
Average sunshine in September
Castro Urdiales, Spain
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 18min
The months with the most sunshine are June and July (Average sunshine: 9h and 24min).
The month with the least sunshine is November (Average sunshine: 5h and 12min).
Average sunshine days in September
Castro Urdiales, Spain
- Average sunshine days in September: 10.6 days
The month with the most sunshine days is October (13.3 days).
The month with the least sunshine days is November (8.1 days).
Average UV index in September
Castro Urdiales, Spain
- Average UV index in September: 5
The months with the highest UV index are May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, March, April, November and December (UV index 3).
Average cloud cover in September
Castro Urdiales, Spain
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are September and October (Cloud cover 34).
Average visibility in September
Castro Urdiales, Spain
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, June, July, August, September, October and December (10km).
The months with the lowest visibility are January, May and November (9km).
