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 snowfall in September
- Average snowfall 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 arrival of September signals a shift in temperature, down from a tropical 32.5°C (90.5°F) in August to a moderately hot 27.3°C (81.1°F). In the month of September, Vallecas records a consistent average low-temperature of 15.6°C (60.1°F).Heat index
The heat index in September is computed to be 27°C (80.6°F). Long-lasting exposure and activity potentially induce a sense of weariness, with the risk of heat cramps.In reference to the heat index, it's for places in shade and with a slight wind. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', measures the perceived warmth when incorporating the humidity present in the air. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Humidity
The average relative humidity in September in Vallecas, Spain, is 43%.Rainfall
In Vallecas, in September, during 4.4 rainfall days, 13mm (0.51") of precipitation is typically accumulated. Throughout the year, there are 89.2 rainfall days, and 240mm (9.45") of precipitation is accumulated.Snowfall
In Vallecas, snow does not fall in April through October.Daylight
In Vallecas, the average length of the day in September is 12h and 28min.On the first day of September in Vallecas, sunrise is at 07:42 and sunset at 20:46. On the last day of the month, sunrise is at 08:10 and sunset at 19:58 CEST.
Sunshine
In Vallecas, the average sunshine in September is 9.6h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In September, a regular UV index of 5 translates into these guidelines:
Adopt protective measures - It is advised to guard against sun damage. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Frequently asked questions
What are the temperatures in Vallecas in September?
What is the average humidity in September in Vallecas?
How much does it rain in Vallecas in September?
When it does not snow in Vallecas?
How many hours of daylight does Vallecas have in September?
When are sunrise and sunset in September in Vallecas?
How long on average sun shines in September in Vallecas?
How high is the UV index in September in Vallecas?
Average temperature in September
Vallecas, Spain
- Average high temperature in September: 27.3°C
The warmest month (with the highest average high temperature) is July (33.2°C).
The month with the lowest average high temperature is January (10°C).
- Average low temperature in September: 15.6°C
The month with the highest average low temperature is July (20.2°C).
The coldest month (with the lowest average low temperature) is January (2°C).
Average pressure in September
Vallecas, Spain
- Average pressure in September: 1017.3mbar
The month with the highest atmospheric pressure is December (1023.6mbar).
The month with the lowest atmospheric pressure is April (1015mbar).
Average wind speed in September
Vallecas, Spain
- Average wind speed in September: 9.6km/h
The windiest month (with the highest average wind speed) is March (12.5km/h).
The calmest months (with the lowest average wind speed) are October and December (9.5km/h).
Average humidity in September
Vallecas, Spain
- Average humidity in September: 43%
The month with the highest relative humidity is January (74%).
The month with the lowest relative humidity is July (32%).
Average rainfall in September
Vallecas, Spain
- Average rainfall in September: 13mm
The wettest month (with the highest rainfall) is April (41mm).
The driest month (with the least rainfall) is July (6mm).
Average rainfall days in September
Vallecas, Spain
- Average rainfall days in September: 4.4 days
The month with the highest number of rainy days is April (12.3 days).
The month with the least rainy days is August (2.3 days).
Average snowfall in September
Vallecas, Spain
- Average snowfall in September: 0mm
The month with the highest snowfall is February (7mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Vallecas, Spain
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Vallecas, Spain
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in September
Vallecas, Spain
- Average sunshine days in September: 23.6 days
The month with the most sunshine days is July (26.9 days).
The month with the least sunshine days is April (14.9 days).
Average UV index in September
Vallecas, Spain
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Vallecas, Spain
- Average cloud cover in September: 15
The month with the most cloud cover is January (Cloud cover 35).
The months with the least cloud cover are July and August (Cloud cover 8).
Average visibility in September
Vallecas, Spain
- Average visibility in September: 10km
The months with the highest visibility are February, March, May, June, July, August, September, October and December (10km).
The months with the lowest visibility are January, April and November (9km).
Vallecas, Spain
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