September weather forecastRio Real, Brazil
September
Weather in September
The first month of the spring, September, is still a warm month in Rio Real, Brazil, with temperature in the range of an average low of 18.6°C (65.5°F) and an average high of 28.4°C (83.1°F).Temperature
With the onset of September, a modest change to a still warm 28.4°C (83.1°F) from August's 27.3°C (81.1°F) is noted in high-temperature. Rio Real, during the month of September, experiences an average low-temperature of 18.6°C (65.5°F).Heat index
For most parts of September, the heat index is calculated to be a hot 33°C (91.4°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.Research indicates the heat index considers values in shaded locales and with light winds. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Humidity
The average relative humidity in September is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 17.1 days and accumulates 17mm (0.67") of precipitation.Daylight
The average length of the day in September in Rio Real is 12h and 2min.On the first day of the month, sunrise is at 05:34 and sunset at 17:28. On the last day of September, in Rio Real, sunrise is at 05:15 and sunset at 17:27 -03.
Sunshine
The average sunshine in September in Rio Real, Brazil, is 6.1h.UV index
In Rio Real, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.Note: An average UV index of 6 in September transforms into this advice:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rio Real, Brazil
- Average high temperature in September: 28.4°C
The warmest month (with the highest average high temperature) is March (32.8°C).
The month with the lowest average high temperature is July (26.6°C).
- Average low temperature in September: 18.6°C
The month with the highest average low temperature is March (22.3°C).
The coldest month (with the lowest average low temperature) is August (18.1°C).
Average pressure in September
Rio Real, Brazil
- Average pressure in September: 1016.5mbar
The month with the highest atmospheric pressure is August (1017.6mbar).
The months with the lowest atmospheric pressure are March and December (1011.9mbar).
Average wind speed in September
Rio Real, Brazil
- Average wind speed in September: 13km/h
The windiest month (with the highest average wind speed) is November (14.2km/h).
The calmest months (with the lowest average wind speed) are April and May (10.2km/h).
Average humidity in September
Rio Real, Brazil
- Average humidity in September: 79%
The month with the highest relative humidity is July (85%).
The months with the lowest relative humidity are February, March and December (72%).
Average rainfall in September
Rio Real, Brazil
- Average rainfall in September: 17mm
The wettest month (with the highest rainfall) is May (58mm).
The driest month (with the least rainfall) is September (17mm).
Average rainfall days in September
Rio Real, Brazil
- Average rainfall days in September: 17.1 days
The months with the highest number of rainy days are May and July (20.2 days).
The months with the least rainy days are November and December (11.6 days).
Average daylight in September /
Average sunshine in September
Rio Real, Brazil
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 12h and 48min).
The month with the shortest days is June (Average daylight: 11h and 30min).
- Average sunshine in September: 6h and 6min
The month with the most sunshine is January (Average sunshine: 8h and 54min).
The month with the least sunshine is May (Average sunshine: 5h and 6min).
Average sunshine days in September
Rio Real, Brazil
- Average sunshine days in September: 9.5 days
The month with the most sunshine days is December (15.5 days).
The month with the least sunshine days is August (6.4 days).
Average UV index in September
Rio Real, Brazil
- Average UV index in September: 6
The months with the highest UV index are January, February, March, November and December (UV index 7).
The month with the lowest UV index is July (UV index 5).
Average cloud cover in September
Rio Real, Brazil
- Average cloud cover in September: 57
The month with the most cloud cover is July (Cloud cover 65).
The months with the least cloud cover are March and December (Cloud cover 44).
Average visibility in September
Rio Real, Brazil
- Average visibility in September: 7km
The months with the highest visibility are February, March, November and December (9km).
The months with the lowest visibility are May, June, July and August (6km).
