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 onset of September, the average high-temperature stands at a still pleasant 22.7°C (72.9°F), closely aligned with August's 22.2°C (72°F). Rio Grande da Serra experiences an average nighttime temperature of 18.5°C (65.3°F) in September, reflecting a minor difference from the day's peak.Humidity
In Rio Grande da Serra, the average relative humidity in September is 80%.Rainfall
In Rio Grande da Serra, Brazil, in September, it is raining for 12.6 days, with typically 43mm (1.69") of accumulated precipitation. In Rio Grande da Serra, during the entire year, the rain falls for 191.3 days and collects up to 819mm (32.24") of precipitation.Daylight
In Rio Grande da Serra, the average length of the day in September is 11h and 58min.On the first day of the month, sunrise is at 06:15 and sunset at 17:55. On the last day of September, sunrise is at 05:46 and sunset at 18:04 -03.
Sunshine
In September, the average sunshine is 7.6h.UV index
The months with the lowest UV index are May, July through September, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: A daily high UV index of 5 in September leads to these guidelines:
Make use of precautions - Suggestions to resist sunburn are communicated. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Frequently asked questions
What are the temperatures in Rio Grande da Serra in September?
What is the average humidity in September in Rio Grande da Serra?
How many days does it rain in September in Rio Grande da Serra?
How many hours of daylight does Rio Grande da Serra have in September?
When are sunrise and sunset in September in Rio Grande da Serra?
How long on average sun shines in September in Rio Grande da Serra?
When is the lowest UV index in Rio Grande da Serra?
How high is the UV index in September in Rio Grande da Serra?
Average temperature in September
Rio Grande da Serra, Brazil
- Average high temperature in September: 22.7°C
The warmest month (with the highest average high temperature) is February (27.8°C).
The month with the lowest average high temperature is July (22°C).
- Average low temperature in September: 18.5°C
The month with the highest average low temperature is February (23.7°C).
The coldest month (with the lowest average low temperature) is August (17.5°C).
Average pressure in September
Rio Grande da Serra, Brazil
- Average pressure in September: 1017.3mbar
The month with the highest atmospheric pressure is July (1020.1mbar).
The month with the lowest atmospheric pressure is December (1011.7mbar).
Average wind speed in September
Rio Grande da Serra, Brazil
- Average wind speed in September: 11.5km/h
The windiest month (with the highest average wind speed) is November (11.6km/h).
The calmest month (with the lowest average wind speed) is February (9.8km/h).
Average humidity in September
Rio Grande da Serra, Brazil
- Average humidity in September: 80%
The month with the highest relative humidity is November (84%).
The month with the lowest relative humidity is August (78%).
Average rainfall in September
Rio Grande da Serra, Brazil
- Average rainfall in September: 43mm
The wettest month (with the highest rainfall) is February (125mm).
The driest month (with the least rainfall) is August (35mm).
Average rainfall days in September
Rio Grande da Serra, Brazil
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is January (23.3 days).
The month with the least rainy days is August (9.1 days).
Average daylight in September /
Average sunshine in September
Rio Grande da Serra, Brazil
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 36min).
The month with the shortest days is June (Average daylight: 10h and 42min).
- Average sunshine in September: 7h and 4min
The month with the most sunshine is May (Average sunshine: 8h and 6min).
The month with the least sunshine is November (Average sunshine: 7h and 0min).
Average sunshine days in September
Rio Grande da Serra, Brazil
- Average sunshine days in September: 13.2 days
The month with the most sunshine days is August (19.5 days).
The month with the least sunshine days is February (3.5 days).
Average UV index in September
Rio Grande da Serra, Brazil
- Average UV index in September: 5
The month with the highest UV index is January (UV index 7).
The months with the lowest UV index are May, July, August and September (UV index 5).
Average cloud cover in September
Rio Grande da Serra, Brazil
- Average cloud cover in September: 38
The month with the most cloud cover is November (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Rio Grande da Serra, Brazil
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September and December (10km).
The months with the lowest visibility are October and November (9km).
Rio Grande da Serra, Brazil
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