September weather forecast and climate
Vendas Novas, Portugal

Weather in September

The first month of the autumn, September, is still a hot month in Vendas Novas, Portugal, with average temperature fluctuating between 15.8°C (60.4°F) and 30°C (86°F).

Temperature

In September, the average high-temperature marginally drops, from a hot 33.7°C (92.7°F) in August, to a still tropical 30°C (86°F). In September, the average low-temperature is 15.8°C (60.4°F).

Heat index

The average heat index is appraised at a tropical 32.3°C (90.1°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, differences in body mass, height, and shape, clothing). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In September, the average relative humidity in Vendas Novas is 57%.

Rainfall

In September, the rain falls for 4.5 days. Throughout September, 9mm (0.35") of precipitation is accumulated. Throughout the year, there are 107 rainfall days, and 344mm (13.54") of precipitation is accumulated.

Daylight

The average length of the day in Vendas Novas is 12.4h.

Sunshine

In September, the average sunshine in Vendas Novas is 9.4h.

UV index

In Vendas Novas, Portugal, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Vendas Novas?

The average high-temperature, in September, in Vendas Novas, Portugal, is 30°C (86°F), while the average low-temperature is 15.8°C (60.4°F). In September, the average heat index (a.k.a. 'feels like', 'real feel'), that factores the actual air temperature with the relative humidity, is estimated at 32.3°C (90.1°F).

What is the average humidity in September in Vendas Novas?

The average relative humidity in September is 57%.

How many days does it rain in September in Vendas Novas?

In September, in Vendas Novas, the rain falls for 4.5 days. Throughout September, 9mm (0.35") of precipitation is accumulated.

What is the average length of the day in September in Vendas Novas?

The average length of the day in September in Vendas Novas, Portugal, is 12.4h.

How long on average sun shines in September in Vendas Novas?

The average sunshine in September is 9.4h.

What is the UV index intensity in September in Vendas Novas?

In Vendas Novas, Portugal, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to the UV radiation.

Average temperature in September
Vendas Novas, Portugal

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

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).

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Average pressure in September
Vendas Novas, Portugal

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).

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Average wind speed in September
Vendas Novas, Portugal

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).

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Average humidity in September
Vendas Novas, Portugal

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%).

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Average rainfall in September
Vendas Novas, Portugal

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).

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Average rainfall days in September
Vendas Novas, Portugal

Average rainfall days in September - Vendas Novas, Portugal
  • Average rainfall days in September: 4.5 days

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).

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Average daylight in September /
Average sunshine in September
Vendas Novas, Portugal

Average daylight in September / Average sunshine in September - Vendas Novas, Portugal
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 9.4h

The month with the most sunshine is July (Average sunshine: 11.5h).
The month with the least sunshine is January (Average sunshine: 5.3h).

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Average sunshine days in September
Vendas Novas, Portugal

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).

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Average UV index in September
Vendas Novas, Portugal

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).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in September
Vendas Novas, Portugal

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).

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Average visibility in September
Vendas Novas, Portugal

Average visibility in September - Vendas Novas, Portugal
  • Average visibility in September: 9km

The month with the highest visibility is June (10km).
Months with the lowest visibility are January and April (8km).

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