Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
Altares's shift from August to September is accompanied by an average high-temperature of a still agreeable 22.4°C (72.3°F), a slight deviation from 22.9°C (73.2°F). September's average low temperature is a still pleasant 21.3°C (70.3°F), displaying a subtle drop from its daily peak.Humidity
September through November, with an average relative humidity of 78%, are the least humid months in Altares, Portugal.Rainfall
In Altares, during September, the rain falls for 14.3 days and regularly aggregates up to 29mm (1.14") of precipitation. In Altares, during the entire year, the rain falls for 178 days and collects up to 543mm (21.38") of precipitation.Daylight
In September, the average length of the day in Altares is 12h and 26min.On the first day of the month, sunrise is at 07:18 and sunset at 20:19. On the last day of September, in Altares, sunrise is at 07:44 and sunset at 19:33 +00.
Sunshine
In Altares, the average sunshine in September is 8h.UV index
In Altares, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 5 during September translates into the following guidance:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. 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
What is the usual temperature for Altares in September?
What is the least humid month in Altares?
What is the average humidity in September in Altares?
How many days does it rain in September in Altares?
How many hours of daylight does Altares have in September?
When is the sunrise / sunset in September in Altares?
How long on average sun shines in September in Altares?
How high is the UV index in September in Altares?
Average temperature in September
Altares, Portugal
- Average high temperature in September: 22.4°C
The warmest month (with the highest average high temperature) is August (22.9°C).
The month with the lowest average high temperature is March (15.6°C).
- Average low temperature in September: 21.3°C
The month with the highest average low temperature is August (21.6°C).
The coldest months (with the lowest average low temperature) are February and March (14.3°C).
Average pressure in September
Altares, Portugal
- Average pressure in September: 1021mbar
The month with the highest atmospheric pressure is July (1024.4mbar).
The month with the lowest atmospheric pressure is October (1016.7mbar).
Average wind speed in September
Altares, Portugal
- Average wind speed in September: 21.1km/h
The windiest month (with the highest average wind speed) is December (29.6km/h).
The calmest month (with the lowest average wind speed) is July (16.4km/h).
Average humidity in September
Altares, Portugal
- Average humidity in September: 78%
The month with the highest relative humidity is June (83%).
The months with the lowest relative humidity are September, October and November (78%).
Average rainfall in September
Altares, Portugal
- Average rainfall in September: 29mm
The wettest month (with the highest rainfall) is December (91mm).
The driest month (with the least rainfall) is July (15mm).
Average rainfall days in September
Altares, Portugal
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is October (19.9 days).
The month with the least rainy days is July (9.6 days).
Average daylight in September /
Average sunshine in September
Altares, Portugal
- Average daylight in September: 12h and 2min
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: 8h and 0min
The month with the most sunshine is July (Average sunshine: 9h and 18min).
The month with the least sunshine is November (Average sunshine: 5h and 0min).
Average sunshine days in September
Altares, Portugal
- Average sunshine days in September: 10.5 days
The month with the most sunshine days is July (16.3 days).
The month with the least sunshine days is October (6.3 days).
Average UV index in September
Altares, Portugal
- Average UV index in September: 5
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are February, March, April and December (UV index 4).
Average cloud cover in September
Altares, Portugal
- Average cloud cover in September: 39
The month with the most cloud cover is November (Cloud cover 52).
The months with the least cloud cover are August and September (Cloud cover 39).
Average visibility in September
Altares, Portugal
- 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).
