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
September
Weather in September
Temperature
September is marked by an average high-temperature of a still pleasant 21°C (69.8°F), almost identical to the preceding month. An average low-temperature of 15°C (59°F) is common in São José during the nights of September.Humidity
In São José, the average relative humidity in September is 84%.Rainfall
In São José, during September, the rain falls for 13.9 days and regularly aggregates up to 72mm (2.83") of precipitation. Throughout the year, in São José, there are 202.2 rainfall days, and 904mm (35.59") of precipitation is accumulated.Sea temperature
In September, the average sea temperature is 18.8°C (65.8°F).Note: Most people do not find swimming enjoyable in water of 18.8°C (65.8°F). The task of controlling breathing becomes tougher as the temperature drops from 21°C (69.8°F) to 15°C (59°F).
Daylight
In September, the average length of the day is 11h and 56min.On the first day of the month, sunrise is at 06:27 and sunset at 18:01. On the last day of September, in São José, sunrise is at 05:53 and sunset at 18:14 -03.
Sunshine
In São José, the average sunshine in September is 7.3h.UV index
The months with the lowest UV index in São José are July and September, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the maximum UV index of 4 suggests this advice:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in São José?
What is the average humidity in September in São José?
How many days does it rain in September in São José?
What is the sea temperature in September in São José?
How many hours of daylight does São José have in September?
What time are sunrise and sunset in September in São José?
How many hours of sunshine does São José have in September?
What are the months with the lowest UV index in São José?
What is the UV index intensity in September in São José?
Average temperature in September
São José, Brazil
- Average high temperature in September: 21°C
The warmest month (with the highest average high temperature) is January (27.3°C).
The month with the lowest average high temperature is July (19.1°C).
- Average low temperature in September: 15°C
The month with the highest average low temperature is February (21.1°C).
The coldest month (with the lowest average low temperature) is July (13.1°C).
Average pressure in September
São José, 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 (1012.2mbar).
Average wind speed in September
São José, Brazil
- Average wind speed in September: 11.4km/h
The windiest month (with the highest average wind speed) is November (11.8km/h).
The calmest month (with the lowest average wind speed) is March (10km/h).
Average humidity in September
São José, Brazil
- Average humidity in September: 84%
The month with the highest relative humidity is October (85%).
The months with the lowest relative humidity are March, April, June, August, November and December (83%).
Average rainfall in September
São José, Brazil
- Average rainfall in September: 72mm
The wettest month (with the highest rainfall) is February (104mm).
The driest months (with the least rainfall) are August and November (57mm).
Average rainfall days in September
São José, Brazil
- Average rainfall days in September: 13.9 days
The months with the highest number of rainy days are January and March (20.8 days).
The month with the least rainy days is June (12.3 days).
Average sea temperature in September
São José, 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
São José, 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 42min).
The month with the least sunshine is October (Average sunshine: 6h and 42min).
Average sunshine days in September
São José, Brazil
- Average sunshine days in September: 13 days
The month with the most sunshine days is June (15.2 days).
The month with the least sunshine days is February (6.3 days).
Average UV index in September
São José, Brazil
- Average UV index in September: 4
The months with the highest UV index are January, February, March and December (UV index 6).
The months with the lowest UV index are July and September (UV index 4).
Average cloud cover in September
São José, Brazil
- Average cloud cover in September: 44
The month with the most cloud cover is October (Cloud cover 53).
The month with the least cloud cover is June (Cloud cover 37).
Average visibility in September
São José, Brazil
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
