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
Weather in September
Temperature
As Rio Maior welcomes September, the average high-temperature is noted at a still moderately hot 24.6°C (76.3°F), closely aligning with the preceding month. Rio Maior in September experiences a low-temperature average of 16.5°C (61.7°F).Humidity
The months with the lowest humidity are September and October, with an average relative humidity of 72%.Rainfall
In Rio Maior, during September, the rain falls for 4.5 days and regularly aggregates up to 6mm (0.24") of precipitation. In Rio Maior, during the entire year, the rain falls for 101.5 days and collects up to 168mm (6.61") of precipitation.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 07:04 and sunset at 20:06. On the last day of September, in Rio Maior, sunrise is at 07:31 and sunset at 19:19 WEST.
Sunshine
In September, the average sunshine in Rio Maior, Portugal, is 9.3h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Avoiding the Sun during its peak radiation time around midday is a healthy practice. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Frequently asked questions
What are September temperatures in Rio Maior?
What is the least humid month in Rio Maior?
What is the average humidity in September in Rio Maior?
How many days does it rain in September in Rio Maior?
How many hours of daylight does Rio Maior have in September?
When are sunrise and sunset in September in Rio Maior?
How long on average sun shines in September in Rio Maior?
What is the UV index intensity in September in Rio Maior?
Average temperature in September
Rio Maior, Portugal
- Average high temperature in September: 24.6°C
The warmest month (with the highest average high temperature) is August (25.6°C).
The month with the lowest average high temperature is January (14°C).
- Average low temperature in September: 16.5°C
The month with the highest average low temperature is August (17°C).
The coldest month (with the lowest average low temperature) is February (8.8°C).
Average pressure in September
Rio Maior, Portugal
- Average pressure in September: 1016.9mbar
The month with the highest atmospheric pressure is December (1022.5mbar).
The month with the lowest atmospheric pressure is April (1015.5mbar).
Average wind speed in September
Rio Maior, Portugal
- Average wind speed in September: 13.5km/h
The windiest month (with the highest average wind speed) is February (17.7km/h).
The calmest month (with the lowest average wind speed) is September (13.5km/h).
Average humidity in September
Rio Maior, Portugal
- Average humidity in September: 72%
The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are September and October (72%).
Average rainfall in September
Rio Maior, Portugal
- Average rainfall in September: 6mm
The wettest month (with the highest rainfall) is November (34mm).
The driest months (with the least rainfall) are July and August (3mm).
Average rainfall days in September
Rio Maior, Portugal
- Average rainfall days in September: 4.5 days
The month with the highest number of rainy days is November (13.7 days).
The month with the least rainy days is August (3 days).
Average daylight in September /
Average sunshine in September
Rio Maior, Portugal
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 2min
The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in September
Rio Maior, Portugal
- Average sunshine days in September: 23.5 days
The month with the most sunshine days is August (25 days).
The month with the least sunshine days is November (13.3 days).
Average UV index in September
Rio Maior, Portugal
- Average UV index in September: 5
The months with the highest UV index are June and August (UV index 6).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in September
Rio Maior, Portugal
- Average cloud cover in September: 20
The month with the most cloud cover is January (Cloud cover 44).
The month with the least cloud cover is September (Cloud cover 20).
Average visibility in September
Rio Maior, Portugal
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (10km).
The months with the lowest visibility are July and August (9km).
Rio Maior, Portugal
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