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
September
Weather in September
Temperature
Ilhavo registers an average high-temperature of a still moderately hot 24.5°C (76.1°F) with the arrival of September, showing minor deviation from the preceding month. An average nighttime temperature of 15.3°C (59.5°F) is witnessed throughout September.Humidity
September is the least humid month in Ilhavo, Portugal, with an average relative humidity of 70%.Rainfall
In Ilhavo, during September, the rain falls for 5.8 days and regularly aggregates up to 23mm (0.91") of precipitation. Throughout the year, in Ilhavo, there are 125.4 rainfall days, and 619mm (24.37") of precipitation is accumulated.Daylight
The average length of the day in September in Ilhavo is 12h and 28min.On the first day of the month, sunrise is at 07:02 and sunset at 20:06. On the last day of September, sunrise is at 07:30 and sunset at 19:18 WEST.
Sunshine
The average sunshine in September in Ilhavo, Portugal, is 9.3h.UV index
May through September, with an average maximum UV index of 5, are months with the highest UV index in Ilhavo. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Ilhavo?
What is the least humid month in Ilhavo?
What is the average humidity in September in Ilhavo?
How many days does it rain in September in Ilhavo?
How many hours of daylight does Ilhavo have in September?
When is the sunrise / sunset in September in Ilhavo?
How many hours of sunshine does Ilhavo have in September?
What is the month with the highest UV index in Ilhavo?
What is the UV index reading in September in Ilhavo?
Average temperature in September
Ilhavo, Portugal
- Average high temperature in September: 24.5°C
The warmest month (with the highest average high temperature) is August (25.4°C).
The month with the lowest average high temperature is January (13.3°C).
- Average low temperature in September: 15.3°C
The month with the highest average low temperature is August (15.9°C).
The coldest month (with the lowest average low temperature) is February (7.6°C).
Average pressure in September
Ilhavo, Portugal
- Average pressure in September: 1017.1mbar
The month with the highest atmospheric pressure is December (1022.6mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).
Average wind speed in September
Ilhavo, Portugal
- Average wind speed in September: 9.8km/h
The windiest month (with the highest average wind speed) is February (12.9km/h).
The calmest month (with the lowest average wind speed) is September (9.8km/h).
Average humidity in September
Ilhavo, Portugal
- Average humidity in September: 70%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is September (70%).
Average rainfall in September
Ilhavo, Portugal
- Average rainfall in September: 23mm
The wettest month (with the highest rainfall) is November (94mm).
The driest month (with the least rainfall) is July (6mm).
Average rainfall days in September
Ilhavo, Portugal
- Average rainfall days in September: 5.8 days
The month with the highest number of rainy days is November (14.9 days).
The month with the least rainy days is August (3.3 days).
Average daylight in September /
Average sunshine in September
Ilhavo, Portugal
- 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 2min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Ilhavo, Portugal
- Average sunshine days in September: 22.7 days
The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is November (12.9 days).
Average UV index in September
Ilhavo, Portugal
- Average UV index in September: 5
The months with the highest UV index are May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Ilhavo, Portugal
- Average cloud cover in September: 19
The month with the most cloud cover is January (Cloud cover 43).
The months with the least cloud cover are July, August and September (Cloud cover 19).
Average visibility in September
Ilhavo, Portugal
- Average visibility in September: 9km
The months with the highest visibility are February, June and December (10km).
The months with the lowest visibility are January, March, April, May, July, August, September, October and November (9km).
