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
The shift from August to September is characterized by an average high-temperature of a warm 28.5°C (83.3°F), not significantly different from the 31°C (87.8°F) of August. A significant drop from the day's peak to an average low-temperature of 15.1°C (59.2°F) is noted during the nights in September.Heat index
The heat index for September is calculated to be a hot 31°C (87.8°F). Ongoing activity coupled with exposure often results in weariness and could induce heat cramps.Realize that the values for the heat index are set for shaded places and light winds. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a value derived by merging air temperature with the humidity to convey how the climate feels. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Humidity
In Marinhais, the average relative humidity in September is 63%.Rainfall
In September, the rain falls for 5.5 days. Throughout September, 17mm (0.67") of precipitation is accumulated. Throughout the year, there are 107.9 rainfall days, and 335mm (13.19") of precipitation is accumulated.Daylight
In September, the average length of the day in Marinhais is 12h and 26min.On the first day of September, sunrise is at 07:04 and sunset at 20:05. On the last day of the month, sunrise is at 07:30 and sunset at 19:18 WEST.
Sunshine
In September, the average sunshine is 9.4h.UV index
In Marinhais, Portugal, 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 the ordinary person.Note: A maximum high UV index of 5 in September translates into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. When the Sun is at its strongest around midday, find shade and limit exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Frequently asked questions
Is it hot in Marinhais during September?
What is the average humidity in September in Marinhais?
How much does it rain in Marinhais in September?
How many hours of daylight does Marinhais have in September?
When is the sunrise / sunset in September in Marinhais?
How many hours of sunshine does Marinhais have in September?
How high is the UV index in September in Marinhais?
Average temperature in September
Marinhais, Portugal
- Average high temperature in September: 28.5°C
The warmest month (with the highest average high temperature) is August (31°C).
The month with the lowest average high temperature is January (14°C).
- Average low temperature in September: 15.1°C
The month with the highest average low temperature is July (15.8°C).
The coldest months (with the lowest average low temperature) are January and February (6.8°C).
Average pressure in September
Marinhais, Portugal
- Average pressure in September: 1016.7mbar
The month with the highest atmospheric pressure is December (1022.6mbar).
The month with the lowest atmospheric pressure is April (1015.5mbar).
Average wind speed in September
Marinhais, Portugal
- Average wind speed in September: 10.5km/h
The windiest month (with the highest average wind speed) is July (13.2km/h).
The calmest month (with the lowest average wind speed) is September (10.5km/h).
Average humidity in September
Marinhais, Portugal
- Average humidity in September: 63%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (62%).
Average rainfall in September
Marinhais, Portugal
- Average rainfall in September: 17mm
The wettest month (with the highest rainfall) is November (53mm).
The driest months (with the least rainfall) are July and August (3mm).
Average rainfall days in September
Marinhais, Portugal
- Average rainfall days in September: 5.5 days
The month with the highest number of rainy days is November (13.9 days).
The month with the least rainy days is August (2.4 days).
Average daylight in September /
Average sunshine in September
Marinhais, 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 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
Marinhais, Portugal
- Average sunshine days in September: 23.4 days
The month with the most sunshine days is July (27.3 days).
The months with the least sunshine days are April and November (14.6 days).
Average UV index in September
Marinhais, 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, November and December (UV index 3).
Average cloud cover in September
Marinhais, Portugal
- Average cloud cover in September: 20
The month with the most cloud cover is January (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Marinhais, Portugal
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February, March, April, May, July, August, September, October, November and December (9km).
Marinhais, Portugal
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