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
With the start of September, Nilópolis measures an average high-temperature of a still moderately hot 26°C (78.8°F), not significantly differing from August's 24.8°C (76.6°F). An average low-temperature of 17.5°C (63.5°F) is common during the nights of September.Humidity
The average relative humidity in September in Nilópolis 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 the month, sunrise is at 06:03 and sunset at 17:43. On the last day of September, in Nilópolis, Brazil, sunrise is at 05:34 and sunset at 17:52 -03.
Sunshine
The average sunshine in September is 7.6h.UV index
April, May, July and September, with an average maximum UV index of 5, are months with the lowest UV index in Nilópolis. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: The average daily UV index of 5 in September transforms into the following instructions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Nilópolis?
What is the average humidity in September in Nilópolis?
How many days does it rain in September in Nilópolis?
What is the average length of the day in September in Nilópolis?
When is the sunrise / sunset in September in Nilópolis?
How long on average sun shines in September in Nilópolis?
When is the lowest UV index in Nilópolis?
What is the UV index reading in September in Nilópolis?
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 4min
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).
Nilópolis, Brazil
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