September weather forecastCaieiras, Brazil
September
Weather in September
September, the first month of the spring in Caieiras, is also a moderately hot month, with an average temperature varying between 25.4°C (77.7°F) and 14.7°C (58.5°F).Temperature
Caieiras registers an average high-temperature of a still warm 25.4°C (77.7°F) at the commencement of September, closely related to the preceding month. Caieiras's September nights cool down to an average low-temperature of 14.7°C (58.5°F).Humidity
The months with the lowest humidity are August and September, with an average relative humidity of 73%.Rainfall
In Caieiras, during September, the rain falls for 12.5 days and regularly aggregates up to 46mm (1.81") of precipitation. In Caieiras, Brazil, during the entire year, the rain falls for 220.1 days and collects up to 1232mm (48.5") of precipitation.Daylight
The average length of the day in September in Caieiras, Brazil, is 11h and 58min.On the first day of September, sunrise is at 06:16 and sunset at 17:56. On the last day of the month, sunrise is at 05:47 and sunset at 18:05 -03.
Sunshine
September has the most sunshine of the year in Caieiras, with an average of 8.7h of sunshine.UV index
February through September, November and December, with an average maximum UV index of 5, are months with the lowest UV index in Caieiras. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. It's recommended to limit sun exposure when its radiation is at its peak during midday. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Caieiras, Brazil
- Average high temperature in September: 25.4°C
The warmest month (with the highest average high temperature) is December (26.4°C).
The month with the lowest average high temperature is June (20.8°C).
- Average low temperature in September: 14.7°C
The month with the highest average low temperature is January (18.3°C).
The coldest month (with the lowest average low temperature) is July (12.4°C).
Average pressure in September
Caieiras, Brazil
- Average pressure in September: 1017.2mbar
The month with the highest atmospheric pressure is July (1020.3mbar).
The month with the lowest atmospheric pressure is December (1011.9mbar).
Average wind speed in September
Caieiras, Brazil
- Average wind speed in September: 10km/h
The windiest month (with the highest average wind speed) is October (10.3km/h).
The calmest month (with the lowest average wind speed) is February (7.9km/h).
Average humidity in September
Caieiras, Brazil
- Average humidity in September: 73%
The month with the highest relative humidity is March (87%).
The months with the lowest relative humidity are August and September (73%).
Average rainfall in September
Caieiras, Brazil
- Average rainfall in September: 46mm
The wettest month (with the highest rainfall) is January (234mm).
The driest month (with the least rainfall) is August (33mm).
Average rainfall days in September
Caieiras, Brazil
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is January (27.6 days).
The month with the least rainy days is August (8.1 days).
Average daylight in September /
Average sunshine in September
Caieiras, Brazil
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 30min).
The month with the shortest days is June (Average daylight: 10h and 42min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is September (Average sunshine: 8h and 42min).
The month with the least sunshine is January (Average sunshine: 7h and 12min).
Average sunshine days in September
Caieiras, Brazil
- Average sunshine days in September: 13.8 days
The month with the most sunshine days is August (19.9 days).
The month with the least sunshine days is January (2.3 days).
Average UV index in September
Caieiras, Brazil
- Average UV index in September: 5
The months with the highest UV index are January and October (UV index 6).
The months with the lowest UV index are February, March, April, May, June, July, August, September, November and December (UV index 5).
Average cloud cover in September
Caieiras, Brazil
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Caieiras, Brazil
- Average visibility in September: 9km
The months with the highest visibility are August and September (9km).
The months with the lowest visibility are January, February, March, April and May (7km).
