September weather forecastAlenquer, Portugal
September
Weather in September
The first month of the autumn, September, is still a warm month in Alenquer, Portugal, with an average temperature varying between 28.2°C (82.8°F) and 15.8°C (60.4°F).Temperature
The dawn of September sees an average high-temperature of a warm 28.2°C (82.8°F), subtly contrasting with August's 30.1°C (86.2°F). Alenquer observes a dramatic plunge from daytime highs in September, settling at an average low-temperature of 15.8°C (60.4°F).Heat index
For most parts of September, the heat index is evaluated at a hot 30°C (86°F). Exposure and extended activity could potentially cause a state of fatigue and lead to heat cramps.Be advised, the heat index considers values for conditions in shade and with a light breeze. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
In Alenquer, the average relative humidity in September is 65%.Rainfall
In Alenquer, during September, the rain falls for 5.3 days and regularly aggregates up to 16mm (0.63") of precipitation. In Alenquer, during the entire year, the rain falls for 97.3 days and collects up to 310mm (12.2") of precipitation.Daylight
The average length of the day in September is 12h and 26min.On the first day of September in Alenquer, sunrise is at 07:05 and sunset at 20:06. On the last day of the month, sunrise is at 07:31 and sunset at 19:20 WEST.
Sunshine
In Alenquer, the average sunshine in September is 9.2h.UV index
In Alenquer, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the average maximum UV index of 5 translates into the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Alenquer, Portugal
- Average high temperature in September: 28.2°C
The warmest month (with the highest average high temperature) is August (30.1°C).
The month with the lowest average high temperature is January (14.6°C).
- Average low temperature in September: 15.8°C
The month with the highest average low temperature is July (16.5°C).
The coldest month (with the lowest average low temperature) is February (7.7°C).
Average pressure in September
Alenquer, Portugal
- Average pressure in September: 1016.8mbar
The month with the highest atmospheric pressure is December (1022.6mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).
Average wind speed in September
Alenquer, Portugal
- Average wind speed in September: 11.3km/h
The windiest month (with the highest average wind speed) is July (14.2km/h).
The calmest month (with the lowest average wind speed) is October (11km/h).
Average humidity in September
Alenquer, Portugal
- Average humidity in September: 65%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (64%).
Average rainfall in September
Alenquer, Portugal
- Average rainfall in September: 16mm
The wettest month (with the highest rainfall) is November (56mm).
The driest month (with the least rainfall) is July (2mm).
Average rainfall days in September
Alenquer, Portugal
- Average rainfall days in September: 5.3 days
The month with the highest number of rainy days is April (12.8 days).
The month with the least rainy days is July (2.2 days).
Average daylight in September /
Average sunshine in September
Alenquer, Portugal
- Average daylight in September: 12h and 24min
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 12min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in September
Alenquer, Portugal
- Average sunshine days in September: 24 days
The month with the most sunshine days is July (28.4 days).
The month with the least sunshine days is April (15.8 days).
Average UV index in September
Alenquer, 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, November and December (UV index 3).
Average cloud cover in September
Alenquer, Portugal
- Average cloud cover in September: 21
The month with the most cloud cover is January (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in September
Alenquer, 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).
