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
Alfarelos notes an average high-temperature of a still warm 23°C (73.4°F) in September, hardly diverging from August. Alfarelos in September experiences a low-temperature average of 16.3°C (61.3°F).Humidity
September and October, with an average relative humidity of 74%, are the least humid months.Rainfall
In Alfarelos, in September, it is raining for 6.2 days, with typically 25mm (0.98") of accumulated precipitation. Throughout the year, there are 130.4 rainfall days, and 585mm (23.03") of precipitation is accumulated.Daylight
In September, the average length of the day in Alfarelos is 12h and 27min.On the first day of the month, sunrise is at 07:02 and sunset at 20:06. On the last day of September, sunrise is at 07:30 and sunset at 19:18 WEST.
Sunshine
In September, the average sunshine in Alfarelos, Portugal, is 9.3h.UV index
May through September, with an average maximum UV index of 5, are months with the highest UV index. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: A maximum daily UV index of 5 during September morphs into the following directions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Alfarelos?
What are the least humid months in Alfarelos?
What is the average humidity in September in Alfarelos?
How many days does it rain in September in Alfarelos?
What is the average length of the day in September in Alfarelos?
When is the sunrise / sunset in September in Alfarelos?
How many hours of sunshine does Alfarelos have in September?
What is the month with the highest UV index in Alfarelos?
What is the UV index reading in September in Alfarelos?
Average temperature in September
Alfarelos, Portugal
- Average high temperature in September: 23°C
The warmest month (with the highest average high temperature) is August (23.4°C).
The month with the lowest average high temperature is January (13.7°C).
- Average low temperature in September: 16.3°C
The months with the highest average low temperature are July and August (16.8°C).
The coldest month (with the lowest average low temperature) is February (9.3°C).
Average pressure in September
Alfarelos, Portugal
- Average pressure in September: 1017mbar
The month with the highest atmospheric pressure is December (1022.5mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).
Average wind speed in September
Alfarelos, Portugal
- Average wind speed in September: 12.8km/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 September (12.8km/h).
Average humidity in September
Alfarelos, Portugal
- Average humidity in September: 74%
The month with the highest relative humidity is January (78%).
The months with the lowest relative humidity are September and October (74%).
Average rainfall in September
Alfarelos, Portugal
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is November (97mm).
The driest month (with the least rainfall) is July (6mm).
Average rainfall days in September
Alfarelos, Portugal
- Average rainfall days in September: 6.2 days
The month with the highest number of rainy days is November (16 days).
The month with the least rainy days is August (4.5 days).
Average daylight in September /
Average sunshine in September
Alfarelos, 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 month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Alfarelos, Portugal
- Average sunshine days in September: 21.8 days
The month with the most sunshine days is August (23.9 days).
The month with the least sunshine days is November (11.9 days).
Average UV index in September
Alfarelos, Portugal
- Average UV index in September: 5
The months with the highest UV index are May, June, July, August and September (UV index 5).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in September
Alfarelos, Portugal
- Average cloud cover in September: 20
The month with the most cloud cover is January (Cloud cover 42).
The months with the least cloud cover are August and September (Cloud cover 20).
Average visibility in September
Alfarelos, 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).
