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 snowfall in September
- Average snowfall 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
A subtle shift in Alentejo's weather is observed as August turns into September, with the average high temperature reducing from a warm 29.8°C (85.6°F) to a still moderately hot 25.8°C (78.4°F). Despite high daytime temperatures, the average temperature in Alentejo lowers to a cool 12.8°C (55°F) during September nights.Humidity
In Alentejo, the average relative humidity in September is 56%.Rainfall
In Alentejo, during September, the rain falls for 4.8 days and regularly aggregates up to 15mm (0.59") of precipitation. Throughout the year, in Alentejo, there are 116.6 rainfall days, and 496mm (19.53") of precipitation is accumulated.Snowfall
In Alentejo, Portugal, snow does not fall in May through September.Daylight
In September, the average length of the day in Alentejo is 12h and 27min.On the first day of September in Alentejo, sunrise is at 06:59 and sunset at 20:02. On the last day of the month, sunrise is at 07:27 and sunset at 19:14 WEST.
Sunshine
In Alentejo, the average sunshine in September is 9.4h.UV index
The average daily maximum UV index in September in Alentejo, Portugal, is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Ensure safety - Recommendations to avert sunburn are presented. To protect against the Sun's most potent rays, avoid direct exposure around midday. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Alentejo?
What is the average humidity in September in Alentejo?
How many days does it rain in September in Alentejo?
When it does not snow in Alentejo?
Does it snow in Alentejo in September?
How many hours of daylight does Alentejo have in September?
What time are sunrise and sunset in September in Alentejo?
How many hours of sunshine does Alentejo have in September?
What is the UV index reading in September in Alentejo?
Average temperature in September
Alentejo, Portugal
- Average high temperature in September: 25.8°C
The warmest month (with the highest average high temperature) is August (29.8°C).
The month with the lowest average high temperature is January (9.8°C).
- Average low temperature in September: 12.8°C
The month with the highest average low temperature is August (14.2°C).
The coldest month (with the lowest average low temperature) is January (2.3°C).
Average pressure in September
Alentejo, Portugal
- Average pressure in September: 1016.8mbar
The month with the highest atmospheric pressure is December (1023mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).
Average wind speed in September
Alentejo, Portugal
- Average wind speed in September: 8.3km/h
The windiest month (with the highest average wind speed) is February (11.5km/h).
The calmest month (with the lowest average wind speed) is September (8.3km/h).
Average humidity in September
Alentejo, Portugal
- Average humidity in September: 56%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (51%).
Average rainfall in September
Alentejo, Portugal
- Average rainfall in September: 15mm
The wettest month (with the highest rainfall) is December (83mm).
The driest months (with the least rainfall) are July and August (7mm).
Average rainfall days in September
Alentejo, Portugal
- Average rainfall days in September: 4.8 days
The month with the highest number of rainy days is April (16.1 days).
The month with the least rainy days is August (2.5 days).
Average snowfall in September
Alentejo, Portugal
- Average snowfall in September: 0mm
The month with the highest snowfall is January (62mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in September
Alentejo, Portugal
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Alentejo, Portugal
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 2min
The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in September
Alentejo, Portugal
- Average sunshine days in September: 24.7 days
The month with the most sunshine days is August (27.5 days).
The month with the least sunshine days is April (12.7 days).
Average UV index in September
Alentejo, 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 January, February, November and December (UV index 2).
Average cloud cover in September
Alentejo, Portugal
- Average cloud cover in September: 19
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility in September
Alentejo, Portugal
- Average visibility in September: 9km
The months with the highest visibility are July and August (10km).
The month with the lowest visibility is January (7km).
