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 snowfall in September
- Average snowfall 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 minor shift in the average high-temperature, adjusting from 28.3°C (82.9°F) in August to a still warm 24.3°C (75.7°F). Nighttime in September brings a stark departure from the daily high in Rio de Onor, resting at an average low-temperature of 11.5°C (52.7°F).Humidity
The average relative humidity in September is 57%.Rainfall
In September, in Rio de Onor, the rain falls for 7.2 days. Throughout September, 32mm (1.26") of precipitation is accumulated. Throughout the year, there are 141.7 rainfall days, and 532mm (20.94") of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September in Rio de Onor, sunrise is at 06:52 and sunset at 19:59. On the last day of the month, sunrise is at 07:22 and sunset at 19:09 WEST.
Sunshine
In September, the average sunshine in Rio de Onor is 9.6h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: A daily high UV index of 5 in September leads to these guidelines:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Frequently asked questions
What is the average September temperature in Rio de Onor?
What is the average humidity in September in Rio de Onor?
How much does it rain in Rio de Onor in September?
When it does not snow in Rio de Onor?
How many hours of daylight does Rio de Onor have in September?
What time are sunrise and sunset in September in Rio de Onor?
How many hours of sunshine does Rio de Onor have in September?
How high is the UV index in September in Rio de Onor?
Average temperature in September
Rio de Onor, Portugal
- Average high temperature in September: 24.3°C
The warmest month (with the highest average high temperature) is August (28.3°C).
The month with the lowest average high temperature is January (8.3°C).
- Average low temperature in September: 11.5°C
The month with the highest average low temperature is July (13.8°C).
The coldest month (with the lowest average low temperature) is February (1.2°C).
Average pressure in September
Rio de Onor, Portugal
- Average pressure in September: 1017.8mbar
The month with the highest atmospheric pressure is December (1022.9mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).
Average wind speed in September
Rio de Onor, Portugal
- Average wind speed in September: 8.4km/h
The windiest month (with the highest average wind speed) is March (11.2km/h).
The calmest month (with the lowest average wind speed) is September (8.4km/h).
Average humidity in September
Rio de Onor, Portugal
- Average humidity in September: 57%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (52%).
Average rainfall in September
Rio de Onor, Portugal
- Average rainfall in September: 32mm
The wettest month (with the highest rainfall) is November (73mm).
The driest month (with the least rainfall) is August (11mm).
Average rainfall days in September
Rio de Onor, Portugal
- Average rainfall days in September: 7.2 days
The month with the highest number of rainy days is April (17.6 days).
The month with the least rainy days is August (4.2 days).
Average snowfall in September
Rio de Onor, Portugal
- Average snowfall in September: 0mm
The month with the highest snowfall is February (19mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Rio de Onor, Portugal
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Rio de Onor, Portugal
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in September
Rio de Onor, Portugal
- Average sunshine days in September: 20.8 days
The month with the most sunshine days is August (24.5 days).
The month with the least sunshine days is April (10.8 days).
Average UV index in September
Rio de Onor, Portugal
- Average UV index in September: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Rio de Onor, Portugal
- Average cloud cover in September: 20
The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 13).
Average visibility in September
Rio de Onor, Portugal
- Average visibility in September: 10km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January, November and December (8km).
Rio de Onor, Portugal
Weather forecast for your location
2. Allow the app to use your location
