September weather forecastAltea, Spain
September
Weather in September
September in Altea is known for its calmer weather as it bids farewell to the harsh Spanish summer and welcomes the soothing fall. Although temperatures start to cool off, they remain in a comfortable range from 22.5°C (72.5°F) to 24.9°C (76.8°F). As the month progresses, the entire town undergoes a transformation, with foliage changing colour. This weather change, combined with less crowd, provides an excellent opportunity for leisure activities that include hiking and picnics. The mild weather continues to hold the sea temperature in a comfortable bracket for swimming.Temperature
The advent of September sees the average high-temperature at a still moderately hot 24.9°C (76.8°F), subtly shifted from August's 26.9°C (80.4°F). During the month of September, Altea's average nighttime temperature closely mirrors its daytime counterpart, at a pleasant 22.5°C (72.5°F).Humidity
In Altea, the average relative humidity in September is 71%.Rainfall
In September, the rain falls for 3.5 days. Throughout September, 6mm (0.24") of precipitation is accumulated. In Altea, during the entire year, the rain falls for 31.3 days and collects up to 48mm (1.89") of precipitation.Sea temperature
In Altea, in September, the average water temperature is 24.9°C (76.8°F).Note: Swimming in 24.9°C (76.8°F) water can be enjoyable based on one's cold tolerance and conditions like sunshine, wind, and ambient temperature. (Olympic swimmers compete in waters between 25°C (77°F) and 28°C (82.4°F).)
Daylight
In September, the average length of the day in Altea is 12h and 26min.On the first day of the month, sunrise is at 07:29 and sunset at 20:30. On the last day of September, in Altea, Spain, sunrise is at 07:55 and sunset at 19:44 CEST.
Sunshine
In Altea, the average sunshine in September is 9.4h.UV index
In Altea, Spain, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, an average UV index of 6 transforms into the following instructions:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Watch out! Reflections from sand and water can surge UV radiation exposure.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Altea, Spain
- Average high temperature in September: 24.9°C
The warmest month (with the highest average high temperature) is August (26.9°C).
The month with the lowest average high temperature is February (14.2°C).
- Average low temperature in September: 22.5°C
The month with the highest average low temperature is August (24.5°C).
The coldest month (with the lowest average low temperature) is February (11°C).
Average pressure in September
Altea, Spain
- Average pressure in September: 1016.6mbar
The month with the highest atmospheric pressure is December (1021.7mbar).
The month with the lowest atmospheric pressure is April (1014.8mbar).
Average wind speed in September
Altea, Spain
- Average wind speed in September: 12.5km/h
The windiest month (with the highest average wind speed) is January (17.1km/h).
The calmest month (with the lowest average wind speed) is August (11.7km/h).
Average humidity in September
Altea, Spain
- Average humidity in September: 71%
The month with the highest relative humidity is August (73%).
The month with the lowest relative humidity is November (65%).
Average rainfall in September
Altea, Spain
- Average rainfall in September: 6mm
The wettest months (with the highest rainfall) are January and April (7mm).
The driest month (with the least rainfall) is February (0mm).
Average rainfall days in September
Altea, Spain
- Average rainfall days in September: 3.5 days
The month with the highest number of rainy days is April (5.3 days).
The month with the least rainy days is February (0.8 days).
Average sea temperature in September
Altea, Spain
- Average sea temperature in September: 24.9°C
The best month for swimming (with the highest average sea temperature) is August (26.2°C).
The coldest month (with the lowest average sea temperature) is February (14°C).
Average daylight in September /
Average sunshine in September
Altea, Spain
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 24min
The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days in September
Altea, Spain
- Average sunshine days in September: 25.6 days
The month with the most sunshine days is July (29.3 days).
The month with the least sunshine days is November (24.4 days).
Average UV index in September
Altea, Spain
- Average UV index in September: 6
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in September
Altea, Spain
- Average cloud cover in September: 17
The months with the most cloud cover are January, March and April (Cloud cover 25).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in September
Altea, Spain
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
