September weather forecastArregaca, Portugal
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Arregaca, Portugal, with temperature in the range of an average high of 27°C (80.6°F) and an average low of 13.6°C (56.5°F).Temperature
Arregaca measures an average high-temperature of a still warm 27°C (80.6°F) in September, nearly consistent with the preceding month. A significant drop from the day's peak to an average low-temperature of 13.6°C (56.5°F) is noted during the nights in September.Heat index
Throughout September, the heat index is calculated to be 28°C (82.4°F). Continuous exposure and activity could induce a sense of tiredness and subsequently, heat cramps.Bear in mind that the heat index values are determined for shaded areas and light breezes. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
Humidity
August and September, with an average relative humidity of 65%, are the least humid months.Rainfall
In Arregaca, during September, the rain falls for 5.6 days and regularly aggregates up to 23mm (0.91") of precipitation. Throughout the year, there are 119.4 rainfall days, and 525mm (20.67") of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 27min.On the first day of the month, sunrise is at 07:01 and sunset at 20:05. On the last day of September, sunrise is at 07:29 and sunset at 19:17 WEST.
Sunshine
The average sunshine in September is 9.2h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: During September, 5 as the daily maximum UV index converts into the following advice:
Guard yourself - An obligation to protect skin and eyes from harm exists. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Arregaca, Portugal
- Average high temperature in September: 27°C
The warmest month (with the highest average high temperature) is August (29.2°C).
The month with the lowest average high temperature is January (12.9°C).
- Average low temperature in September: 13.6°C
The month with the highest average low temperature is July (14.5°C).
The coldest month (with the lowest average low temperature) is January (5.4°C).
Average pressure in September
Arregaca, Portugal
- Average pressure in September: 1016.8mbar
The month with the highest atmospheric pressure is December (1022.7mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).
Average wind speed in September
Arregaca, Portugal
- Average wind speed in September: 7.2km/h
The windiest month (with the highest average wind speed) is March (9km/h).
The calmest month (with the lowest average wind speed) is September (7.2km/h).
Average humidity in September
Arregaca, Portugal
- Average humidity in September: 65%
The month with the highest relative humidity is January (84%).
The months with the lowest relative humidity are August and September (65%).
Average rainfall in September
Arregaca, Portugal
- Average rainfall in September: 23mm
The wettest month (with the highest rainfall) is November (77mm).
The driest month (with the least rainfall) is July (4mm).
Average rainfall days in September
Arregaca, Portugal
- Average rainfall days in September: 5.6 days
The month with the highest number of rainy days is April (14.7 days).
The month with the least rainy days is August (2.8 days).
Average daylight in September /
Average sunshine in September
Arregaca, Portugal
- Average daylight in September: 12h and 30min
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 12min
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 0min).
Average sunshine days in September
Arregaca, Portugal
- Average sunshine days in September: 23.3 days
The month with the most sunshine days is August (27.5 days).
The months with the least sunshine days are April and November (14.3 days).
Average UV index in September
Arregaca, Portugal
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 3).
Average cloud cover in September
Arregaca, Portugal
- Average cloud cover in September: 24
The month with the most cloud cover is January (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 22).
Average visibility in September
Arregaca, Portugal
- Average visibility in September: 9km
The months with the highest visibility are June, September, October and December (9km).
The months with the lowest visibility are January, February, March, April, May, July, August and November (8km).
