September weather forecastBermeo, Spain
September
Weather in September
September, the first month of the autumn in Bermeo, is also an agreeable month, with temperature in the range of an average low of 15.7°C (60.3°F) and an average high of 21.6°C (70.9°F).Temperature
The transition from August to September sees an average high-temperature of a pleasant 21.6°C (70.9°F), indicating a minor variance from the prior month. During September, Bermeo records a consistent average nighttime temperature of 15.7°C (60.3°F).Humidity
The average relative humidity in September is 75%.Rainfall
September is the month with the least rainfall in Bermeo. Rain falls for 14 days and accumulates 31mm (1.22") of precipitation.Snowfall
April through November are months without snowfall.Sea temperature
In September, the average sea temperature is 20.8°C (69.4°F).Note: Swimming in 20.8°C (69.4°F) is not a pleasurable activity for the majority of people. Breathing becomes increasingly challenging as water temperature descends from 21°C (69.8°F) to 15°C (59°F).
Daylight
The average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 07:35 and sunset at 20:46. On the last day of September, in Bermeo, sunrise is at 08:07 and sunset at 19:53 CEST.
Sunshine
The average sunshine in September in Bermeo is 8.3h.UV index
May through September, with an average maximum UV index of 5, are months with the highest UV index in Bermeo, Spain. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A daily maximum UV index of 5 in September translates into the following instructions:
Undertake protective steps - Recommendations to avoid sunburn are issued. To guard against the harmful effects of the Sun, minimize exposure during midday. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bermeo, Spain
- Average high temperature in September: 21.6°C
The warmest month (with the highest average high temperature) is August (23.3°C).
The month with the lowest average high temperature is January (10.8°C).
- Average low temperature in September: 15.7°C
The month with the highest average low temperature is August (16.9°C).
The coldest month (with the lowest average low temperature) is February (6.5°C).
Average pressure in September
Bermeo, Spain
- Average pressure in September: 1018.4mbar
The month with the highest atmospheric pressure is December (1021.8mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).
Average wind speed in September
Bermeo, Spain
- Average wind speed in September: 10.8km/h
The windiest month (with the highest average wind speed) is February (17.2km/h).
The calmest month (with the lowest average wind speed) is August (9.9km/h).
Average humidity in September
Bermeo, Spain
- Average humidity in September: 75%
The months with the highest relative humidity are May and June (79%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Bermeo, Spain
- Average rainfall in September: 31mm
The wettest month (with the highest rainfall) is November (103mm).
The driest month (with the least rainfall) is September (31mm).
Average rainfall days in September
Bermeo, Spain
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is January (18.6 days).
The month with the least rainy days is October (12.7 days).
Average snowfall in September
Bermeo, Spain
- Average snowfall in September: 0mm
The month with the highest snowfall is February (12mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Bermeo, Spain
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.2 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
Bermeo, Spain
- Average sea temperature in September: 20.8°C
The best month for swimming (with the highest average sea temperature) is August (21.3°C).
The coldest months (with the lowest average sea temperature) are February and March (12.7°C).
Average daylight in September /
Average sunshine in September
Bermeo, 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 month with the most sunshine is July (Average sunshine: 9h and 30min).
The month with the least sunshine is November (Average sunshine: 5h and 12min).
Average sunshine days in September
Bermeo, Spain
- Average sunshine days in September: 13.4 days
The month with the most sunshine days is October (15.4 days).
The month with the least sunshine days is May (8.8 days).
Average UV index in September
Bermeo, 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
Bermeo, 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
Bermeo, Spain
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
