September weather forecastCorroios, Portugal
September
Weather in September
When September rolls around, Corroios seems eager to pacify the summer heat. This transition brings back the rain on occasional days, with an average of 3mm (0.12") over 3.3 days. As the prolonged summer phase begins to retreat, temperatures navigate downwards but remain in still comfortable ranges. Corroios welcomes this phase with open arms as it not only dampens the heat but restores the town's coastal pleasantness. Altogether, September marks the onset of Autumn, a welcome change amidst prolonged summe.Temperature
As September unfolds in Corroios, the average high-temperature reaches a still moderately hot 25.7°C (78.3°F), hinting at a slight fluctuation from the previous month. Corroios observes an average nighttime low-temperature of 17.7°C (63.9°F) during the month of September.Humidity
In September, the average relative humidity in Corroios is 69%.Rainfall
In Corroios, in September, during 3.3 rainfall days, 3mm (0.12") of precipitation is typically accumulated. In Corroios, during the entire year, the rain falls for 54.4 days and collects up to 62mm (2.44") of precipitation.Sea temperature
With an average sea temperature of 19.9°C (67.8°F), September is the month with the warmest seawater in Corroios, Portugal.Note: Swimming in water at 19.9°C (67.8°F) is not a pleasing experience for the majority. As the temperature descends from 21°C (69.8°F) to 15°C (59°F), controlling breathing becomes increasingly hard.
Daylight
The average length of the day in September in Corroios is 12h and 26min.On the first day of September, sunrise is at 07:06 and sunset at 20:06. On the last day of the month, sunrise is at 07:32 and sunset at 19:20 WEST.
Sunshine
In Corroios, the average sunshine in September is 9.4h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for average individuals.Note: In September, a daily UV index of 6 turns into the following recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Corroios, Portugal
- Average high temperature in September: 25.7°C
The warmest month (with the highest average high temperature) is August (27.1°C).
The month with the lowest average high temperature is January (14.9°C).
- Average low temperature in September: 17.7°C
The month with the highest average low temperature is July (17.9°C).
The coldest month (with the lowest average low temperature) is February (9.8°C).
Average pressure in September
Corroios, 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
Corroios, Portugal
- Average wind speed in September: 13km/h
The windiest month (with the highest average wind speed) is February (16.5km/h).
The calmest month (with the lowest average wind speed) is September (13km/h).
Average humidity in September
Corroios, Portugal
- Average humidity in September: 69%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Corroios, Portugal
- Average rainfall in September: 3mm
The wettest month (with the highest rainfall) is November (15mm).
The driest months (with the least rainfall) are June, July and August (1mm).
Average rainfall days in September
Corroios, Portugal
- Average rainfall days in September: 3.3 days
The month with the highest number of rainy days is November (9.3 days).
The month with the least rainy days is August (0.8 days).
Average sea temperature in September
Corroios, Portugal
- Average sea temperature in September: 19.9°C
The best month for swimming (with the highest average sea temperature) is September (19.9°C).
The coldest month (with the lowest average sea temperature) is March (15.1°C).
Average daylight in September /
Average sunshine in September
Corroios, Portugal
- Average daylight in September: 12h and 24min
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 30min).
- Average sunshine in September: 9h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in September
Corroios, Portugal
- Average sunshine days in September: 26.1 days
The month with the most sunshine days is July (29.7 days).
The month with the least sunshine days is November (17.7 days).
Average UV index in September
Corroios, Portugal
- Average UV index in September: 6
The months with the highest UV index are May, June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in September
Corroios, Portugal
- Average cloud cover in September: 17
The month with the most cloud cover is January (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in September
Corroios, 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).
