September weather forecastRianápolis, Brazil
September
Weather in September
The first month of the spring, September, is still a tropical month in Rianápolis, Brazil, with temperature in the range of an average high of 33.5°C (92.3°F) and an average low of 20.4°C (68.7°F).Temperature
Rianápolis's warmest month, September, generally records average temperatures ranging from a high of 33.5°C (92.3°F) to a low of 20.4°C (68.7°F).Heat index
The heat index value during September is appraised at a very hot 35°C (95°F). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'feels like' or 'real feel', unifies temperature and humidity readings to offer a comprehensive feel of warmth. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.
Humidity
The least humid month is September, with an average relative humidity of 40%.Rainfall
In September, the rain falls for 7.9 days. Throughout September, 16mm (0.63") of precipitation is accumulated. In Rianápolis, during the entire year, the rain falls for 219.6 days and collects up to 1537mm (60.51") of precipitation.Daylight
The average length of the day in September is 12h and 1min.On the first day of September in Rianápolis, Brazil, sunrise is at 06:23 and sunset at 18:12. On the last day of the month, sunrise is at 06:00 and sunset at 18:14 -03.
Sunshine
In Rianápolis, the average sunshine in September is 9.7h.UV index
The months with the highest UV index in Rianápolis, Brazil, are August and September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.Note: The UV index of 7 during September leads to these advisories:
Shun overexposure. Protection from sun ravages is indispensable. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rianápolis, Brazil
- Average high temperature in September: 33.5°C
The warmest month (with the highest average high temperature) is September (33.5°C).
The month with the lowest average high temperature is January (27°C).
- Average low temperature in September: 20.4°C
The month with the highest average low temperature is October (21°C).
The coldest month (with the lowest average low temperature) is July (16.1°C).
Average pressure in September
Rianápolis, Brazil
- Average pressure in September: 1013.5mbar
The month with the highest atmospheric pressure is July (1017mbar).
The month with the lowest atmospheric pressure is November (1011mbar).
Average wind speed in September
Rianápolis, Brazil
- Average wind speed in September: 8.1km/h
The windiest month (with the highest average wind speed) is August (8.3km/h).
The calmest month (with the lowest average wind speed) is March (5.2km/h).
Average humidity in September
Rianápolis, Brazil
- Average humidity in September: 40%
The month with the highest relative humidity is March (88%).
The month with the lowest relative humidity is September (40%).
Average rainfall in September
Rianápolis, Brazil
- Average rainfall in September: 16mm
The wettest month (with the highest rainfall) is November (266mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in September
Rianápolis, Brazil
- Average rainfall days in September: 7.9 days
The months with the highest number of rainy days are January and December (29.3 days).
The month with the least rainy days is August (1.3 days).
Average daylight in September /
Average sunshine in September
Rianápolis, Brazil
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 0min).
The month with the shortest days is June (Average daylight: 11h and 12min).
- Average sunshine in September: 9h and 42min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days in September
Rianápolis, Brazil
- Average sunshine days in September: 21.3 days
The month with the most sunshine days is August (29 days).
The months with the least sunshine days are February and November (0.7 days).
Average UV index in September
Rianápolis, Brazil
- Average UV index in September: 7
The months with the highest UV index are August and September (UV index 7).
The months with the lowest UV index are February and December (UV index 5).
Average cloud cover in September
Rianápolis, Brazil
- Average cloud cover in September: 15
The month with the most cloud cover is December (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in September
Rianápolis, Brazil
- Average visibility in September: 10km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January, February and March (7km).
