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
September ushers in a minute temperature change, with average high-temperatures reducing from August's hot 32.7°C (90.9°F) to a moderately hot 29.5°C (85.1°F). Following the sharp contrast to daytime warmth, an average nighttime temperature of 15°C (59°F) gets registered in Alvega, Portugal, during September.Heat index
In September, the average heat index is computed to be a hot 31°C (87.8°F). Continued exposure and engagement in activity might trigger tiredness and subsequently heat cramps.It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', measures the perceived warmth when incorporating the humidity present in the air. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Humidity
The average relative humidity in September in Alvega is 57%.Rainfall
In Alvega, in September, during 4.3 rainfall days, 16mm (0.63") of precipitation is typically accumulated. Throughout the year, there are 85.1 rainfall days, and 280mm (11.02") of precipitation is accumulated.Daylight
In Alvega, the average length of the day in September is 12h and 26min.On the first day of September in Alvega, sunrise is at 07:01 and sunset at 20:03. On the last day of the month, sunrise is at 07:27 and sunset at 19:16 WEST.
Sunshine
In September, the average sunshine is 9.2h.UV index
The months with the highest UV index in Alvega, Portugal, are May through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The average daily UV index of 6 in September transforms into the following instructions:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Frequently asked questions
How hot is it in Alvega in September?
What is the average humidity in September in Alvega?
How many days does it rain in September in Alvega?
How many hours of daylight does Alvega have in September?
When are sunrise and sunset in September in Alvega?
How long on average sun shines in September in Alvega?
What are the months with the highest UV index in Alvega?
How high is the UV index in September in Alvega?
Average temperature in September
Alvega, Portugal
- Average high temperature in September: 29.5°C
The warmest month (with the highest average high temperature) is August (32.7°C).
The month with the lowest average high temperature is January (13.3°C).
- Average low temperature in September: 15°C
The month with the highest average low temperature is August (15.7°C).
The coldest month (with the lowest average low temperature) is January (5.7°C).
Average pressure in September
Alvega, Portugal
- Average pressure in September: 1016.5mbar
The month with the highest atmospheric pressure is December (1022.8mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).
Average wind speed in September
Alvega, Portugal
- Average wind speed in September: 9.8km/h
The windiest month (with the highest average wind speed) is February (12.6km/h).
The calmest month (with the lowest average wind speed) is September (9.8km/h).
Average humidity in September
Alvega, Portugal
- Average humidity in September: 57%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (55%).
Average rainfall in September
Alvega, Portugal
- Average rainfall in September: 16mm
The wettest month (with the highest rainfall) is November (50mm).
The driest months (with the least rainfall) are July and August (3mm).
Average rainfall days in September
Alvega, Portugal
- Average rainfall days in September: 4.3 days
The month with the highest number of rainy days is November (11.2 days).
The month with the least rainy days is August (1.6 days).
Average daylight in September /
Average sunshine in September
Alvega, 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 24min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in September
Alvega, Portugal
- Average sunshine days in September: 25 days
The months with the most sunshine days are July and August (28.7 days).
The month with the least sunshine days is November (17.9 days).
Average UV index in September
Alvega, Portugal
- Average UV index in September: 6
The months with the highest UV index are May, June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Alvega, Portugal
- Average cloud cover in September: 19
The month with the most cloud cover is January (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 12).
Average visibility in September
Alvega, Portugal
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The month with the lowest visibility is January (8km).
Alvega, Portugal
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