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 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
September brings a marginal elevation to a still moderately hot 23.5°C (74.3°F) from August's 24.2°C (75.6°F) in Vale de Santiago's average high-temperatures. The low temperature average in Vale de Santiago during September reflects a slight decrease to a refreshing 18.8°C (65.8°F) from the day's peak.Humidity
In September, the average relative humidity in Vale de Santiago is 73%.Rainfall
In September, in Vale de Santiago, the rain falls for 4.2 days. Throughout September, 14mm (0.55") of precipitation is accumulated. In Vale de Santiago, during the entire year, the rain falls for 94.7 days and collects up to 328mm (12.91") of precipitation.Daylight
In Vale de Santiago, the average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 07:04 and sunset at 20:02. On the last day of the month, sunrise is at 07:28 and sunset at 19:18 WEST.
Sunshine
The average sunshine in September in Vale de Santiago is 9.4h.UV index
The months with the highest UV index are June through September, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. 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. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Frequently asked questions
What is the usual temperature for Vale de Santiago in September?
What is the average humidity in September in Vale de Santiago?
How much does it rain in Vale de Santiago in September?
How many hours of daylight does Vale de Santiago have in September?
What time are sunrise and sunset in September in Vale de Santiago?
How many hours of sunshine does Vale de Santiago have in September?
What are the months with the highest UV index in Vale de Santiago?
What is the UV index reading in September in Vale de Santiago?
Average temperature in September
Vale de Santiago, Portugal
- Average high temperature in September: 23.5°C
The warmest month (with the highest average high temperature) is August (24.2°C).
The month with the lowest average high temperature is February (14.8°C).
- Average low temperature in September: 18.8°C
The months with the highest average low temperature are August and September (18.8°C).
The coldest month (with the lowest average low temperature) is February (10.8°C).
Average pressure in September
Vale de Santiago, Portugal
- Average pressure in September: 1016.9mbar
The month with the highest atmospheric pressure is December (1022.6mbar).
The month with the lowest atmospheric pressure is April (1015.7mbar).
Average wind speed in September
Vale de Santiago, Portugal
- Average wind speed in September: 15km/h
The windiest month (with the highest average wind speed) is February (19.4km/h).
The calmest month (with the lowest average wind speed) is September (15km/h).
Average humidity in September
Vale de Santiago, Portugal
- Average humidity in September: 73%
The month with the highest relative humidity is April (76%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Vale de Santiago, Portugal
- Average rainfall in September: 14mm
The wettest month (with the highest rainfall) is November (56mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in September
Vale de Santiago, Portugal
- Average rainfall days in September: 4.2 days
The month with the highest number of rainy days is November (13.4 days).
The month with the least rainy days is August (1.1 days).
Average daylight in September /
Average sunshine in September
Vale de Santiago, 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 month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).
Average sunshine days in September
Vale de Santiago, Portugal
- Average sunshine days in September: 25.1 days
The month with the most sunshine days is August (29.4 days).
The month with the least sunshine days is April (15.3 days).
Average UV index in September
Vale de Santiago, Portugal
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, April, November and December (UV index 4).
Average cloud cover in September
Vale de Santiago, Portugal
- Average cloud cover in September: 16
The month with the most cloud cover is January (Cloud cover 37).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in September
Vale de Santiago, Portugal
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Vale de Santiago, Portugal
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