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 commencement of September includes a gentle temperature shift, with the average high-temperature dropping a bit from 33.7°C (92.7°F) in August to a still hot 30°C (86°F). In Vendas Novas, September nights witness a remarkable decline from the day's zenith to a moderate 15.8°C (60.4°F).Heat index
Throughout September, the heat index is calculated to be a tropical 32°C (89.6°F). Extended exposure and activity might lead to tiredness, potentially resulting in heat cramps.Know that the heat index computations account for shaded terrains and slight winds. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Humidity
The average relative humidity in September in Vendas Novas is 57%.Rainfall
In Vendas Novas, during September, the rain falls for 4.5 days and regularly aggregates up to 9mm (0.35") of precipitation. In Vendas Novas, during the entire year, the rain falls for 107 days and collects up to 344mm (13.54") of precipitation.Daylight
The average length of the day in September in Vendas Novas is 12h and 26min.On the first day of the month, sunrise is at 07:03 and sunset at 20:03. On the last day of September, sunrise is at 07:29 and sunset at 19:18 WEST.
Sunshine
The average sunshine in September is 9.4h.UV index
In Vendas Novas, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the average person.Note: The daily high UV index of 6 in September translates into this advice:
Guard oneself from overexposure. Defence against sun injury is vital. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Frequently asked questions
Is it hot in Vendas Novas during September?
What is the average humidity in September in Vendas Novas?
How many days does it rain in September in Vendas Novas?
What is the average length of the day in September in Vendas Novas?
When is the sunrise / sunset in September in Vendas Novas?
How long on average sun shines in September in Vendas Novas?
What is the UV index intensity in September in Vendas Novas?
Average temperature in September
Vendas Novas, Portugal
- Average high temperature in September: 30°C
The warmest month (with the highest average high temperature) is August (33.7°C).
The month with the lowest average high temperature is January (14°C).
- Average low temperature in September: 15.8°C
The months with the highest average low temperature are July and August (16.1°C).
The coldest month (with the lowest average low temperature) is February (5.8°C).
Average pressure in September
Vendas Novas, Portugal
- Average pressure in September: 1016.5mbar
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
Vendas Novas, Portugal
- Average wind speed in September: 9.2km/h
The windiest month (with the highest average wind speed) is March (11.5km/h).
The calmest month (with the lowest average wind speed) is September (9.2km/h).
Average humidity in September
Vendas Novas, Portugal
- Average humidity in September: 57%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (54%).
Average rainfall in September
Vendas Novas, Portugal
- Average rainfall in September: 9mm
The wettest month (with the highest rainfall) is April (53mm).
The driest months (with the least rainfall) are July and August (1mm).
Average rainfall days in September
Vendas Novas, Portugal
- Average rainfall days in September: 4.5 days
The months with the highest number of rainy days are March and April (14.9 days).
The month with the least rainy days is August (1.3 days).
Average daylight in September /
Average sunshine in September
Vendas Novas, Portugal
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
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 30min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in September
Vendas Novas, Portugal
- Average sunshine days in September: 24 days
The month with the most sunshine days is July (29.3 days).
The month with the least sunshine days is April (13.4 days).
Average UV index in September
Vendas Novas, Portugal
- Average UV index in September: 6
The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Vendas Novas, Portugal
- Average cloud cover in September: 19
The month with the most cloud cover is January (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 12).
Average visibility in September
Vendas Novas, Portugal
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January and April (8km).
Vendas Novas, Portugal
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