September weather forecast and climate
Cala, Angola

The first month of the spring, September, is still a tropical month in Cala, Angola, with temperature in the range of an average low of 19.5°C (67.1°F) and an average high of 31.4°C (88.5°F).

Temperature

In Cala, the average high-temperature is almost the same as in August - a still hot 31.4°C (88.5°F). The average low-temperature, is 19.5°C (67.1°F).

Heat index

In September, the average heat index is appraised at a very hot 36.8°C (98.2°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, wind, differences in body mass, height, and shape, and metabolic differences affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, 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.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in September is 64%.

Rainfall

In Cala, in September, during 11.3 rainfall days, 16mm (0.63") of precipitation is typically accumulated. In Cala, during the entire year, the rain falls for 208.7 days and collects up to 1182mm (46.54") of precipitation.

Daylight

In Cala, the average length of the day is 12.1h.

Sunshine

The average sunshine in September is 8.4h.

UV index

Months with the highest UV index in Cala are January through December, with an average maximum UV index of 6. Months with the lowest UV index are January through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in Cala?

In Cala, Angola, in September, the average high-temperature is 31.4°C (88.5°F), and the average low-temperature is 19.5°C (67.1°F). In September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), that combines air temperature and relative humidity, is appraised at 36.8°C (98.2°F).

What is the average humidity in September in Cala?

In Cala, the average relative humidity in September is 64%.

How much does it rain in Cala in September?

In Cala, Angola, in September, during 11.3 rainfall days, 16mm (0.63") of precipitation is typically accumulated.

What is the average length of the day in September in Cala?

In Cala, the average length of the day in September is 12.1h.

How long on average sun shines in September in Cala?

In Cala, Angola, the average sunshine in September is 8.4h.

What are the months with the highest UV index in Cala?

January through December, with an average maximum UV index of 6, are months with the highest UV index in Cala.

What are the months with the lowest UV index in Cala?

Months with the lowest UV index in Cala are January through December, with an average maximum UV index of 6.

What is the UV index reading in September in Cala?

In Cala, Angola, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV rays.
Average temperature in September - Cala, Angola
  • Average high temperature in September: 31.4°C

The warmest month (with the highest average high temperature) is August (32°C).
The month with the lowest average high temperature is December (27.8°C).

  • Average low temperature in September: 19.5°C

Months with the highest average low temperature are October and November (20.7°C).
The coldest month (with the lowest average low temperature) is June (16.6°C).

Average pressure in September - Cala, Angola
  • Average pressure in September: 1013.1mbar

The month with the highest atmospheric pressure is July (1014.6mbar).
The month with the lowest atmospheric pressure is February (1011.3mbar).

Average wind speed in September - Cala, Angola
  • Average wind speed in September: 9.9km/h

The windiest month (with the highest average wind speed) is September (9.9km/h).
The calmest month (with the lowest average wind speed) is April (5.1km/h).

Average humidity in September - Cala, Angola
  • Average humidity in September: 64%

Months with the highest relative humidity are April and December (86%).
The month with the lowest relative humidity is July (60%).

Average rainfall in September - Cala, Angola
  • Average rainfall in September: 16mm

The wettest month (with the highest rainfall) is April (219mm).
The driest months (with the least rainfall) are June and July (1mm).

Average rainfall days in September - Cala, Angola
  • Average rainfall days in September: 11.3 days

The month with the highest number of rainy days is November (27.1 days).
Months with the least rainy days are June and July (1.7 days).

Average daylight in September / Average sunshine in September - Cala, Angola
  • Average daylight in September: 12.1h

Months with the longest days are January and December (Average daylight: 12.6h).
The month with the shortest days is June (Average daylight: 11.6h).

  • Average sunshine in September: 8.4h

The month with the most sunshine is January (Average sunshine: 9h).
The month with the least sunshine is April (Average sunshine: 6.7h).

Average sunshine days in September - Cala, Angola
  • Average sunshine days in September: 12.6 days

The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is November (1.4 days).

Average UV index in September - Cala, Angola
  • Average UV index in September: 6

Months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
Months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).

Average cloud cover in September - Cala, Angola
  • Average cloud cover in September: 34

The month with the most cloud cover is November (Cloud cover 63).
The month with the least cloud cover is June (Cloud cover 17).

Average visibility in September - Cala, Angola
  • Average visibility in September: 10km

Months with the highest visibility are July, August and September (10km).
Months with the lowest visibility are January, March, April and December (7km).