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
Weather in September
Temperature
In September, the average high-temperature registers at a still warm 26.5°C (79.7°F), nearly identical to August's 24.4°C (75.9°F). Porto Firme records an average temperature drop to a mild 15.5°C (59.9°F) in September.Humidity
The least humid month in Porto Firme is September, with an average relative humidity of 73%.Rainfall
In Porto Firme, in September, during 12.5 rainfall days, 45mm (1.77") of precipitation is typically accumulated. Throughout the year, there are 231.1 rainfall days, and 1302mm (51.26") of precipitation is accumulated.Daylight
In Porto Firme, the average length of the day in September is 11h and 59min.On the first day of September in Porto Firme, sunrise is at 06:00 and sunset at 17:43. On the last day of the month, sunrise is at 05:33 and sunset at 17:50 -03.
Sunshine
With an average of 8.5h of sunshine, September has the most sunshine of the year in Porto Firme.UV index
The months with the lowest UV index are February through December, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Act with care - The need to guard against sun damage is communicated. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Frequently asked questions
What are September temperatures in Porto Firme?
What is the least humid month in Porto Firme?
What is the average humidity in September in Porto Firme?
How many days does it rain in September in Porto Firme?
How many hours of daylight does Porto Firme have in September?
When is the sunrise / sunset in September in Porto Firme?
What month has the most sunshine in Porto Firme?
How many hours of sunshine does Porto Firme have in September?
When is the lowest UV index in Porto Firme?
What is the UV index intensity in September in Porto Firme?
Average temperature in September
Porto Firme, Brazil
- Average high temperature in September: 26.5°C
The warmest month (with the highest average high temperature) is February (27.1°C).
The month with the lowest average high temperature is June (22.3°C).
- Average low temperature in September: 15.5°C
The month with the highest average low temperature is January (18.6°C).
The coldest month (with the lowest average low temperature) is July (13.2°C).
Average pressure in September
Porto Firme, Brazil
- Average pressure in September: 1018.3mbar
The month with the highest atmospheric pressure is July (1021.2mbar).
The month with the lowest atmospheric pressure is December (1012.9mbar).
Average wind speed in September
Porto Firme, Brazil
- Average wind speed in September: 8.6km/h
The windiest months (with the highest average wind speed) are September and October (8.6km/h).
The calmest month (with the lowest average wind speed) is April (6km/h).
Average humidity in September
Porto Firme, Brazil
- Average humidity in September: 73%
The month with the highest relative humidity is March (90%).
The month with the lowest relative humidity is September (73%).
Average rainfall in September
Porto Firme, Brazil
- Average rainfall in September: 45mm
The wettest month (with the highest rainfall) is December (241mm).
The driest month (with the least rainfall) is July (12mm).
Average rainfall days in September
Porto Firme, Brazil
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is December (28.6 days).
The month with the least rainy days is August (8.3 days).
Average daylight in September /
Average sunshine in September
Porto Firme, Brazil
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 24min).
The month with the shortest days is June (Average daylight: 10h and 54min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is September (Average sunshine: 8h and 30min).
The month with the least sunshine is November (Average sunshine: 6h and 36min).
Average sunshine days in September
Porto Firme, Brazil
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is August (18.3 days).
The month with the least sunshine days is December (0.6 days).
Average UV index in September
Porto Firme, Brazil
- Average UV index in September: 5
The month with the highest UV index is January (UV index 6).
The months with the lowest UV index are February, March, April, May, June, July, August, September, October, November and December (UV index 5).
Average cloud cover in September
Porto Firme, Brazil
- Average cloud cover in September: 34
The months with the most cloud cover are March and April (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 34).
Average visibility in September
Porto Firme, Brazil
- Average visibility in September: 9km
The months with the highest visibility are August and September (9km).
The months with the lowest visibility are March, April and May (6km).
Porto Firme, Brazil
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