September weather forecast
Castro Verde, Portugal

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Weather in September

The first month of the autumn, September, is still a tropical month in Castro Verde, Portugal, with an average temperature fluctuating between 17°C (62.6°F) and 30.8°C (87.4°F).

Temperature

With the onset of September, Castro Verde's climate undergoes a slight change as the average high-temperature moves from a tropical 34.7°C (94.5°F) in August to a still hot 30.8°C (87.4°F). Contrasting the daytime warmth, Castro Verde's September nights cool down to an average of 17°C (62.6°F).

Heat index

September's mean heat index is computed to be a hot 33°C (91.4°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
Understand that the heat index values take into account shaded locations and mild winds. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.

Humidity

In September, the average relative humidity in Castro Verde, Portugal, is 52%.

Rainfall

In Castro Verde, in September, during 3.3 rainfall days, 5mm (0.2") of precipitation is typically accumulated. In Castro Verde, Portugal, during the entire year, the rain falls for 65.2 days and collects up to 110mm (4.33") of precipitation.

Daylight

In September, the average length of the day in Castro Verde, Portugal, is 12h and 25min.
On the first day of the month, sunrise is at 07:02 and sunset at 20:01. On the last day of September, sunrise is at 07:27 and sunset at 19:16 WEST.

Sunshine

The average sunshine in September in Castro Verde is 9.3h.

UV index

The average daily maximum UV index in September in Castro Verde is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the average person.
Note: An average maximum UV index of 6 in September leads to these recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.

Frequently asked questions

How hot is September in Castro Verde?

The average high-temperature, in September, in Castro Verde, is 30.8°C (87.4°F), while the average low-temperature is 17°C (62.6°F). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in September is computed to be 33°C (91.4°F).

What is the average humidity in September in Castro Verde?

In Castro Verde, Portugal, the average relative humidity in September is 52%.

How many days does it rain in September in Castro Verde?

In Castro Verde, Portugal, during September, the rain falls for 3.3 days and regularly aggregates up to 5mm (0.2") of precipitation.

How many hours of daylight does Castro Verde have in September?

In Castro Verde, Portugal, the average day length in September is 12h and 25min.

When are sunrise and sunset in September in Castro Verde?

In September, on the first day of the month, sunrise is at 07:02 and sunset at 20:01. On the last day of the month, in Castro Verde, Portugal, sunrise is at 07:27 and sunset at 19:16 WEST.

How long on average sun shines in September in Castro Verde?

In September, the average sunshine duration in Castro Verde, Portugal, is 9.3h.

How high is the UV index in September in Castro Verde?

The average daily maximum UV index in September in Castro Verde is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in September
Castro Verde, Portugal

Average temperature in September - Castro Verde, Portugal
  • Average high temperature in September: 30.8°C

The warmest month (with the highest average high temperature) is August (34.7°C).
The month with the lowest average high temperature is January (14.4°C).

  • Average low temperature in September: 17°C

The month with the highest average low temperature is August (17.8°C).
The coldest month (with the lowest average low temperature) is February (5.3°C).

Average pressure in September
Castro Verde, Portugal

Average pressure in September - Castro Verde, Portugal
  • Average pressure in September: 1016.4mbar

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
Castro Verde, Portugal

Average wind speed in September - Castro Verde, Portugal
  • Average wind speed in September: 9.7km/h

The windiest month (with the highest average wind speed) is July (11.9km/h).
The calmest month (with the lowest average wind speed) is September (9.7km/h).

Average humidity in September
Castro Verde, Portugal

Average humidity in September - Castro Verde, Portugal
  • Average humidity in September: 52%

The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (47%).

Average rainfall in September
Castro Verde, Portugal

Average rainfall in September - Castro Verde, Portugal
  • Average rainfall in September: 5mm

The wettest month (with the highest rainfall) is April (20mm).
The driest months (with the least rainfall) are July and August (1mm).

Average rainfall days in September
Castro Verde, Portugal

Average rainfall days in September - Castro Verde, Portugal
  • Average rainfall days in September: 3.3 days

The month with the highest number of rainy days is April (9.7 days).
The month with the least rainy days is August (1 days).

Average daylight in September /
Average sunshine in September
Castro Verde, Portugal

Average daylight in September / Average sunshine in September - Castro Verde, Portugal
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in September: 9h and 2min

The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).

Average sunshine days in September
Castro Verde, Portugal

Average sunshine days in September - Castro Verde, Portugal
  • Average sunshine days in September: 25.2 days

The month with the most sunshine days is July (28.9 days).
The month with the least sunshine days is April (18.8 days).

Average UV index in September
Castro Verde, Portugal

Average UV index in September - Castro Verde, Portugal
  • Average UV index in September: 6

The months with the highest UV index are July and 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
Castro Verde, Portugal

Average cloud cover in September - Castro Verde, Portugal
  • Average cloud cover in September: 17

The months with the most cloud cover are January and April (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 10).

Average visibility in September
Castro Verde, Portugal

Average visibility in September - Castro Verde, Portugal
  • Average visibility in September: 10km

The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January, February, March, April, May, October, November and December (9km).

Castro Verde, Portugal

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