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 sea temperature 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 commences with an average high-temperature of a still pleasant 20.9°C (69.6°F), showing little deviation from August's 20.1°C (68.2°F). Ribeirão da Ilha's nocturnal average in September closely mirrors its daytime temperatures, settling at a refreshing 16.1°C (61°F).Humidity
September and October, with an average relative humidity of 83%, are the most humid months in Ribeirão da Ilha.Rainfall
In Ribeirão da Ilha, Brazil, in September, during 13 rainfall days, 66mm (2.6") of precipitation is typically accumulated. In Ribeirão da Ilha, Brazil, during the entire year, the rain falls for 172.2 days and collects up to 772mm (30.39") of precipitation.Sea temperature
In Ribeirão da Ilha, the average seawater temperature in September is 18.8°C (65.8°F).Note: In water with a temperature of 18.8°C (65.8°F), most people do not enjoy swimming. As the temperature descends from 21°C (69.8°F) to 15°C (59°F), breathing becomes increasingly difficult to control.
Daylight
In September, the average length of the day in Ribeirão da Ilha, Brazil, is 11h and 56min.On the first day of September in Ribeirão da Ilha, Brazil, sunrise is at 06:26 and sunset at 18:01. On the last day of the month, sunrise is at 05:53 and sunset at 18:14 -03.
Sunshine
The average sunshine in September is 7.3h.UV index
May through October, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 5 during September translates into the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Ribeirão da Ilha in September?
What are the most humid months in Ribeirão da Ilha?
What is the average humidity in September in Ribeirão da Ilha?
How many days does it rain in September in Ribeirão da Ilha?
What is the sea temperature in September in Ribeirão da Ilha?
What is the average length of the day in September in Ribeirão da Ilha?
When are sunrise and sunset in September in Ribeirão da Ilha?
How long on average sun shines in September in Ribeirão da Ilha?
What is the month with the lowest UV index in Ribeirão da Ilha?
What is the UV index reading in September in Ribeirão da Ilha?
Average temperature in September
Ribeirão da Ilha, Brazil
- Average high temperature in September: 20.9°C
The warmest month (with the highest average high temperature) is February (27.4°C).
The month with the lowest average high temperature is July (19.2°C).
- Average low temperature in September: 16.1°C
The month with the highest average low temperature is February (22.5°C).
The coldest month (with the lowest average low temperature) is July (14.3°C).
Average pressure in September
Ribeirão da Ilha, Brazil
- Average pressure in September: 1017.9mbar
The month with the highest atmospheric pressure is July (1020.2mbar).
The month with the lowest atmospheric pressure is December (1012.1mbar).
Average wind speed in September
Ribeirão da Ilha, Brazil
- Average wind speed in September: 13.8km/h
The windiest month (with the highest average wind speed) is November (14.6km/h).
The calmest month (with the lowest average wind speed) is March (12.3km/h).
Average humidity in September
Ribeirão da Ilha, Brazil
- Average humidity in September: 83%
The months with the highest relative humidity are September and October (83%).
The month with the lowest relative humidity is April (80%).
Average rainfall in September
Ribeirão da Ilha, Brazil
- Average rainfall in September: 66mm
The wettest month (with the highest rainfall) is February (89mm).
The driest month (with the least rainfall) is November (47mm).
Average rainfall days in September
Ribeirão da Ilha, Brazil
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is March (17.9 days).
The month with the least rainy days is June (10.8 days).
Average sea temperature in September
Ribeirão da Ilha, Brazil
- Average sea temperature in September: 18.8°C
The best months for swimming (with the highest average sea temperature) are January and February (25.8°C).
The coldest month (with the lowest average sea temperature) is July (18.6°C).
Average daylight in September /
Average sunshine in September
Ribeirão da Ilha, Brazil
- Average daylight in September: 11h and 5min
The month with the longest days is December (Average daylight: 13h and 54min).
The month with the shortest days is June (Average daylight: 10h and 24min).
- Average sunshine in September: 7h and 2min
The months with the most sunshine are February and April (Average sunshine: 7h and 48min).
The month with the least sunshine is October (Average sunshine: 6h and 42min).
Average sunshine days in September
Ribeirão da Ilha, Brazil
- Average sunshine days in September: 13.6 days
The month with the most sunshine days is June (16.8 days).
The month with the least sunshine days is March (10.1 days).
Average UV index in September
Ribeirão da Ilha, Brazil
- Average UV index in September: 5
The months with the highest UV index are January, February, March, April, November and December (UV index 6).
The months with the lowest UV index are May, June, July, August, September and October (UV index 5).
Average cloud cover in September
Ribeirão da Ilha, Brazil
- Average cloud cover in September: 43
The month with the most cloud cover is October (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 36).
Average visibility in September
Ribeirão da Ilha, Brazil
- Average visibility in September: 9km
The months with the highest visibility are March, April, May, June, July and November (10km).
The months with the lowest visibility are January, February, August, September, October and December (9km).
Ribeirão da Ilha, Brazil
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