September weather forecastFontelo, Portugal
September
Weather in September
The first month of the autumn, September, is still a warm month in Fontelo, Portugal, with an average temperature fluctuating between 12.4°C (54.3°F) and 25.6°C (78.1°F).Temperature
September's arrival comes with a mild decrease in the average high-temperature, moving subtly from 28.6°C (83.5°F) in August to a still moderately hot 25.6°C (78.1°F). Despite the drastic temperature difference, Fontelo records an average nighttime low of 12.4°C (54.3°F) throughout September.Humidity
In Fontelo, the average relative humidity in September is 59%.Rainfall
In Fontelo, during September, the rain falls for 6.6 days and regularly aggregates up to 17mm (0.67") of precipitation. Throughout the year, there are 108.1 rainfall days, and 286mm (11.26") of precipitation is accumulated.Snowfall
April through October are months without snowfall in Fontelo, Portugal.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 06:58 and sunset at 20:03. On the last day of the month, sunrise is at 07:27 and sunset at 19:14 WEST.
Sunshine
In Fontelo, the average sunshine in September is 9.2h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 5 during September leads to these instructions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Fontelo, Portugal
- Average high temperature in September: 25.6°C
The warmest month (with the highest average high temperature) is July (28.8°C).
The month with the lowest average high temperature is January (9.4°C).
- Average low temperature in September: 12.4°C
The month with the highest average low temperature is July (14.1°C).
The coldest month (with the lowest average low temperature) is February (2.3°C).
Average pressure in September
Fontelo, Portugal
- Average pressure in September: 1017.3mbar
The month with the highest atmospheric pressure is December (1022.8mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).
Average wind speed in September
Fontelo, Portugal
- Average wind speed in September: 6.5km/h
The windiest month (with the highest average wind speed) is March (8.6km/h).
The calmest month (with the lowest average wind speed) is September (6.5km/h).
Average humidity in September
Fontelo, Portugal
- Average humidity in September: 59%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (56%).
Average rainfall in September
Fontelo, Portugal
- Average rainfall in September: 17mm
The wettest month (with the highest rainfall) is December (49mm).
The driest month (with the least rainfall) is July (8mm).
Average rainfall days in September
Fontelo, Portugal
- Average rainfall days in September: 6.6 days
The month with the highest number of rainy days is April (13.6 days).
The month with the least rainy days is August (3.9 days).
Average snowfall in September
Fontelo, Portugal
- 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
Fontelo, Portugal
- 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
Fontelo, Portugal
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 12min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Fontelo, Portugal
- Average sunshine days in September: 21.9 days
The month with the most sunshine days is August (25.5 days).
The month with the least sunshine days is April (14.1 days).
Average UV index in September
Fontelo, Portugal
- Average UV index in September: 5
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Fontelo, Portugal
- Average cloud cover in September: 24
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in September
Fontelo, Portugal
- Average visibility in September: 9km
The months with the highest visibility are June, July, August and September (9km).
The month with the lowest visibility is January (6km).
