September weather forecast
Cumbres de San Bartolomé, Spain

September

Weather in September

September, the first month of the autumn in Cumbres de San Bartolomé, is also a moderately hot month, with an average temperature varying between 15.9°C (60.6°F) and 29.7°C (85.5°F).

Temperature

With the commencement of September, Cumbres de San Bartolomé records a moderate temperature decline, with the average high easing from August's tropical 34.4°C (93.9°F) to a warm 29.7°C (85.5°F). In September, the nighttime temperature in Cumbres de San Bartolomé plummets remarkably from the daily apex to a steady average of 15.9°C (60.6°F).

Heat index

September's mean heat index is estimated at a hot 31°C (87.8°F). When exposure and activity are sustained, they could induce fatigue, with a chance of heat cramps.
Heat index specifics point out values are for conditions of shade and a slight breeze. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.

Humidity

The average relative humidity in September is 51%.

Rainfall

In Cumbres de San Bartolomé, during September, the rain falls for 5.2 days and regularly aggregates up to 9mm (0.35") of precipitation. In Cumbres de San Bartolomé, during the entire year, the rain falls for 90.1 days and collects up to 296mm (11.65") of precipitation.

Daylight

The average length of the day in September is 12h and 26min.
On the first day of September in Cumbres de San Bartolomé, Spain, sunrise is at 07:57 and sunset at 20:56. On the last day of the month, sunrise is at 08:22 and sunset at 20:11 CEST.

Sunshine

In September, the average sunshine in Cumbres de San Bartolomé is 9.6h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: A daily maximum UV index of 5 in September translates into the following instructions:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Enhance your sun protection with tightly woven, yet airy clothing.

Frequently asked questions

Is it hot in Cumbres de San Bartolomé during September?
During September, Cumbres de San Bartolomé experiences an average high-temperature of 29.7°C (85.5°F) and a low-temperature of 15.9°C (60.6°F). In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines relative humidity and air temperature, is estimated at 31°C (87.8°F).
What is the average humidity in September in Cumbres de San Bartolomé?
In September, the average relative humidity is 51%.
How much does it rain in Cumbres de San Bartolomé in September?
In Cumbres de San Bartolomé, during September, the rain falls for 5.2 days and regularly aggregates up to 9mm (0.35") of precipitation.
How many hours of daylight does Cumbres de San Bartolomé have in September?
In Cumbres de San Bartolomé, the average day length in September is 12h and 26min.
When is the sunrise / sunset in September in Cumbres de San Bartolomé?
On the first day of September in Cumbres de San Bartolomé, Spain, sunrise is at 07:57 and sunset at 20:56. On the last day of the month, sunrise is at 08:22 and sunset at 20:11 CEST.
How many hours of sunshine does Cumbres de San Bartolomé have in September?
In September, the average sunshine duration in Cumbres de San Bartolomé, Spain, is 9.6h.
What is the UV index intensity in September in Cumbres de San Bartolomé?
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September - Cumbres de San Bartolomé, Spain
Average temperature in September
Cumbres de San Bartolomé, Spain
  • Average high temperature in September: 29.7°C

The warmest month (with the highest average high temperature) is August (34.4°C).
The month with the lowest average high temperature is January (13.1°C).

  • Average low temperature in September: 15.9°C

The month with the highest average low temperature is August (17.2°C).
The coldest month (with the lowest average low temperature) is January (4°C).

Average pressure in September - Cumbres de San Bartolomé, Spain
Average pressure in September
Cumbres de San Bartolomé, Spain
  • Average pressure in September: 1016.2mbar

The month with the highest atmospheric pressure is December (1022.8mbar).
The month with the lowest atmospheric pressure is August (1015.1mbar).

Average wind speed in September - Cumbres de San Bartolomé, Spain
Average wind speed in September
Cumbres de San Bartolomé, Spain
  • Average wind speed in September: 7.8km/h

The windiest month (with the highest average wind speed) is February (11.2km/h).
The calmest month (with the lowest average wind speed) is September (7.8km/h).

Average humidity in September - Cumbres de San Bartolomé, Spain
Average humidity in September
Cumbres de San Bartolomé, Spain
  • Average humidity in September: 51%

The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (42%).

Average rainfall in September - Cumbres de San Bartolomé, Spain
Average rainfall in September
Cumbres de San Bartolomé, Spain
  • Average rainfall in September: 9mm

The wettest month (with the highest rainfall) is March (45mm).
The driest month (with the least rainfall) is July (1mm).

Average rainfall days in September - Cumbres de San Bartolomé, Spain
Average rainfall days in September
Cumbres de San Bartolomé, Spain
  • Average rainfall days in September: 5.2 days

The month with the highest number of rainy days is March (13.5 days).
The month with the least rainy days is July (1.3 days).

Average daylight in September / Average sunshine in September - Cumbres de San Bartolomé, Spain
Average daylight in September /
Average sunshine in September
Cumbres de San Bartolomé, Spain
  • 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 36min).

  • Average sunshine in September: 9h and 4min

The months with the most sunshine are July and August (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).

Average sunshine days in September - Cumbres de San Bartolomé, Spain
Average sunshine days in September
Cumbres de San Bartolomé, Spain
  • Average sunshine days in September: 24 days

The month with the most sunshine days is July (29.2 days).
The month with the least sunshine days is April (16.3 days).

Average UV index in September - Cumbres de San Bartolomé, Spain
Average UV index in September
Cumbres de San Bartolomé, Spain
  • Average UV index in September: 5

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 - Cumbres de San Bartolomé, Spain
Average cloud cover in September
Cumbres de San Bartolomé, Spain
  • Average cloud cover in September: 17

The months with the most cloud cover are January and April (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 7).

Average visibility in September - Cumbres de San Bartolomé, Spain
Average visibility in September
Cumbres de San Bartolomé, Spain
  • 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 and April (8km).

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