September weather forecastJaçanã, Brazil
September
Weather in September
September, the first month of the spring in Jaçanã, is still a hot month, with an average temperature varying between 19.7°C (67.5°F) and 31°C (87.8°F).Temperature
As September takes its course, Jaçanã's average high-temperature registers at a still tropical 31°C (87.8°F), closely aligning with the preceding month. During September in Jaçanã, the average low-temperature is recorded at a refreshing 19.7°C (67.5°F).Heat index
For September, the heat index is evaluated at a torrid 36°C (96.8°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.Always consider that heat index estimations are for light winds and places in the shade. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.
Humidity
In Jaçanã, the average relative humidity in September is 65%.Rainfall
September is the month with the least rainfall. Rain falls for 1.9 days and accumulates 1mm (0.04") of precipitation.Daylight
In Jaçanã, Brazil, the average length of the day in September is 12h and 4min.On the first day of the month, sunrise is at 05:24 and sunset at 17:24. On the last day of September, sunrise is at 05:09 and sunset at 17:19 -03.
Sunshine
The month with the most sunshine in Jaçanã is September, with an average of 9.4h of sunshine.UV index
The months with the highest UV index are January through March, September through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: The daily maximum UV index of 7 in September interprets into the following advice:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Jaçanã, Brazil
- Average high temperature in September: 31°C
The warmest month (with the highest average high temperature) is November (32.3°C).
The month with the lowest average high temperature is July (28.8°C).
- Average low temperature in September: 19.7°C
The month with the highest average low temperature is January (21.9°C).
The coldest month (with the lowest average low temperature) is August (19.3°C).
Average pressure in September
Jaçanã, Brazil
- Average pressure in September: 1014.4mbar
The month with the highest atmospheric pressure is July (1015.2mbar).
The months with the lowest atmospheric pressure are February and November (1011.2mbar).
Average wind speed in September
Jaçanã, Brazil
- Average wind speed in September: 27.8km/h
The windiest month (with the highest average wind speed) is September (27.8km/h).
The calmest month (with the lowest average wind speed) is April (17.4km/h).
Average humidity in September
Jaçanã, Brazil
- Average humidity in September: 65%
The months with the highest relative humidity are April and May (77%).
The month with the lowest relative humidity is November (62%).
Average rainfall in September
Jaçanã, Brazil
- Average rainfall in September: 1mm
The wettest month (with the highest rainfall) is March (128mm).
The driest month (with the least rainfall) is September (1mm).
Average rainfall days in September
Jaçanã, Brazil
- Average rainfall days in September: 1.9 days
The month with the highest number of rainy days is March (23.3 days).
The month with the least rainy days is September (1.9 days).
Average daylight in September /
Average sunshine in September
Jaçanã, Brazil
- Average daylight in September: 12h and 6min
The month with the longest days is December (Average daylight: 12h and 30min).
The month with the shortest days is June (Average daylight: 11h and 48min).
- Average sunshine in September: 9h and 24min
The month with the most sunshine is September (Average sunshine: 9h and 24min).
The month with the least sunshine is July (Average sunshine: 8h and 0min).
Average sunshine days in September
Jaçanã, Brazil
- Average sunshine days in September: 26.5 days
The month with the most sunshine days is September (26.5 days).
The month with the least sunshine days is March (6.5 days).
Average UV index in September
Jaçanã, Brazil
- Average UV index in September: 7
The months with the highest UV index are January, February, March, September, October, November and December (UV index 7).
The months with the lowest UV index are April, May, June, July and August (UV index 6).
Average cloud cover in September
Jaçanã, Brazil
- Average cloud cover in September: 23
The month with the most cloud cover is April (Cloud cover 44).
The month with the least cloud cover is September (Cloud cover 23).
Average visibility in September
Jaçanã, Brazil
- Average visibility in September: 10km
The months with the highest visibility are January, February, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are March, April and May (9km).
