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 unfolding of September shows an average high-temperature of a warm 28.8°C (83.8°F), indicating a slight variance from August's 31.3°C (88.3°F). A steady average of 14.7°C (58.5°F) throughout September in Casais Robustos underscores a considerable divergence from the daytime high.Heat index
For most parts of September, the heat index is evaluated at a hot 31°C (87.8°F). If exposure and ongoing activity persist, they might induce a state of tiredness and heat cramps.Heat index values are typically calculated for conditions of shade and a light breeze. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
Humidity
In Casais Robustos, the average relative humidity in September is 62%.Rainfall
In Casais Robustos, during September, the rain falls for 6.1 days and regularly aggregates up to 25mm (0.98") of precipitation. Throughout the year, in Casais Robustos, there are 113.2 rainfall days, and 426mm (16.77") of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 07:03 and sunset at 20:05. On the last day of September, sunrise is at 07:30 and sunset at 19:18 WEST.
Sunshine
The average sunshine in September in Casais Robustos is 9.1h.UV index
June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the average person.Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Frequently asked questions
How hot is September in Casais Robustos?
What is the average humidity in September in Casais Robustos?
How many days does it rain in September in Casais Robustos?
What is the average length of the day in September in Casais Robustos?
When is the sunrise / sunset in September in Casais Robustos?
How long on average sun shines in September in Casais Robustos?
When is the highest UV index in Casais Robustos?
What is the UV index reading in September in Casais Robustos?
Average temperature in September
Casais Robustos, Portugal
- Average high temperature in September: 28.8°C
The warmest month (with the highest average high temperature) is August (31.3°C).
The month with the lowest average high temperature is January (13.7°C).
- Average low temperature in September: 14.7°C
The month with the highest average low temperature is July (15.3°C).
The coldest months (with the lowest average low temperature) are January and February (6.2°C).
Average pressure in September
Casais Robustos, Portugal
- Average pressure in September: 1016.6mbar
The month with the highest atmospheric pressure is December (1022.7mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).
Average wind speed in September
Casais Robustos, Portugal
- Average wind speed in September: 10.6km/h
The windiest month (with the highest average wind speed) is July (13.3km/h).
The calmest month (with the lowest average wind speed) is October (10.5km/h).
Average humidity in September
Casais Robustos, Portugal
- Average humidity in September: 62%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (61%).
Average rainfall in September
Casais Robustos, Portugal
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is November (66mm).
The driest months (with the least rainfall) are July and August (4mm).
Average rainfall days in September
Casais Robustos, Portugal
- Average rainfall days in September: 6.1 days
The month with the highest number of rainy days is April (14.3 days).
The month with the least rainy days is August (3 days).
Average daylight in September /
Average sunshine in September
Casais Robustos, 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 6min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in September
Casais Robustos, Portugal
- Average sunshine days in September: 22.8 days
The month with the most sunshine days is July (27.6 days).
The month with the least sunshine days is April (14 days).
Average UV index in September
Casais Robustos, Portugal
- Average UV index in September: 6
The months with the highest UV index are 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
Casais Robustos, Portugal
- Average cloud cover in September: 22
The month with the most cloud cover is January (Cloud cover 46).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in September
Casais Robustos, Portugal
- Average visibility in September: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is January (8km).
Casais Robustos, Portugal
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