September weather forecastNilópolis, Brazil
September
Weather in September
September, the first month of the spring in Nilópolis, is also a moderately hot month, with an average temperature fluctuating between 26°C (78.8°F) and 17.5°C (63.5°F).Temperature
September ushers in an average high-temperature of a still moderately hot 26°C (78.8°F), aligning closely with the preceding month. In the month of September, Nilópolis experiences an average low-temperature of 17.5°C (63.5°F).Humidity
The average relative humidity in September is 78%.Rainfall
In Nilópolis, during September, the rain falls for 14.8 days and regularly aggregates up to 50mm (1.97") of precipitation. In Nilópolis, during the entire year, the rain falls for 220.6 days and collects up to 991mm (39.02") of precipitation.Daylight
The average length of the day in September is 11h and 58min.On the first day of September, sunrise is at 06:03 and sunset at 17:43. On the last day of the month, sunrise is at 05:34 and sunset at 17:52 -03.
Sunshine
In September, the average sunshine is 7.6h.UV index
The months with the lowest UV index are April, May, July and September, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 5 during September translates into the following directions:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Nilópolis, Brazil
- Average high temperature in September: 26°C
The warmest month (with the highest average high temperature) is February (30.3°C).
The month with the lowest average high temperature is July (24°C).
- Average low temperature in September: 17.5°C
The month with the highest average low temperature is January (21.6°C).
The coldest month (with the lowest average low temperature) is August (16.1°C).
Average pressure in September
Nilópolis, Brazil
- Average pressure in September: 1017.8mbar
The month with the highest atmospheric pressure is July (1020.5mbar).
The month with the lowest atmospheric pressure is December (1012.1mbar).
Average wind speed in September
Nilópolis, Brazil
- Average wind speed in September: 7.8km/h
The windiest month (with the highest average wind speed) is September (7.8km/h).
The calmest month (with the lowest average wind speed) is March (6km/h).
Average humidity in September
Nilópolis, Brazil
- Average humidity in September: 78%
The months with the highest relative humidity are March and April (84%).
The month with the lowest relative humidity is August (77%).
Average rainfall in September
Nilópolis, Brazil
- Average rainfall in September: 50mm
The wettest month (with the highest rainfall) is January (148mm).
The driest month (with the least rainfall) is June (29mm).
Average rainfall days in September
Nilópolis, Brazil
- Average rainfall days in September: 14.8 days
The month with the highest number of rainy days is December (25.7 days).
The month with the least rainy days is August (10.8 days).
Average daylight in September /
Average sunshine in September
Nilópolis, 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 48min).
- Average sunshine in September: 7h and 36min
The month with the most sunshine is February (Average sunshine: 8h and 30min).
The month with the least sunshine is November (Average sunshine: 6h and 36min).
Average sunshine days in September
Nilópolis, Brazil
- Average sunshine days in September: 12.6 days
The month with the most sunshine days is August (17.9 days).
The month with the least sunshine days is December (3.9 days).
Average UV index in September
Nilópolis, Brazil
- Average UV index in September: 5
The month with the highest UV index is December (UV index 7).
The months with the lowest UV index are April, May, July and September (UV index 5).
Average cloud cover in September
Nilópolis, Brazil
- Average cloud cover in September: 39
The month with the most cloud cover is November (Cloud cover 55).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in September
Nilópolis, Brazil
- Average visibility in September: 9km
The months with the highest visibility are February, June, July, August, September and October (9km).
The months with the lowest visibility are January, March, April, May, November and December (8km).
