September weather forecastPrincesa Isabel, Brazil
September
Weather in September
The first month of the spring, September, is a hot month in Princesa Isabel, Brazil, with an average temperature fluctuating between 18.9°C (66°F) and 31.8°C (89.2°F).Temperature
The advent of September brings an average high-temperature of a hot 31.8°C (89.2°F), almost identical to the preceding month. A dramatic downturn marks the September nights, with lows averaging at a refreshing 18.9°C (66°F).Heat index
In September, the average heat index is evaluated at a torrid 36°C (96.8°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.Know that the heat index computations account for shaded terrains and slight winds. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', determines the feeling of heat when you account for the relative humidity. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.
Humidity
In September, the average relative humidity in Princesa Isabel is 57%.Rainfall
September is the month with the least rainfall. Rain falls for 2.5 days and accumulates 1mm (0.04") of precipitation.Daylight
The average length of the day in September in Princesa Isabel is 12h and 4min.On the first day of September in Princesa Isabel, Brazil, sunrise is at 05:32 and sunset at 17:30. On the last day of the month, sunrise is at 05:16 and sunset at 17:26 -03.
Sunshine
In September, the average sunshine in Princesa Isabel, Brazil, is 9.1h.UV index
February, March, September through December, with an average maximum UV index of 7, are months with the highest UV index in Princesa Isabel. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: In September, the maximum UV index of 7 suggests these recommendations:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Princesa Isabel, Brazil
- Average high temperature in September: 31.8°C
The warmest month (with the highest average high temperature) is November (33.8°C).
The month with the lowest average high temperature is July (28.1°C).
- Average low temperature in September: 18.9°C
The month with the highest average low temperature is November (22.3°C).
The coldest months (with the lowest average low temperature) are July and August (17.3°C).
Average pressure in September
Princesa Isabel, Brazil
- Average pressure in September: 1014.8mbar
The month with the highest atmospheric pressure is July (1016.3mbar).
The month with the lowest atmospheric pressure is November (1010.8mbar).
Average wind speed in September
Princesa Isabel, Brazil
- Average wind speed in September: 18.4km/h
The windiest month (with the highest average wind speed) is September (18.4km/h).
The calmest month (with the lowest average wind speed) is March (10.6km/h).
Average humidity in September
Princesa Isabel, Brazil
- Average humidity in September: 57%
The month with the highest relative humidity is May (75%).
The month with the lowest relative humidity is November (49%).
Average rainfall in September
Princesa Isabel, Brazil
- Average rainfall in September: 1mm
The wettest month (with the highest rainfall) is March (88mm).
The driest month (with the least rainfall) is September (1mm).
Average rainfall days in September
Princesa Isabel, Brazil
- Average rainfall days in September: 2.5 days
The month with the highest number of rainy days is March (20.3 days).
The month with the least rainy days is September (2.5 days).
Average daylight in September /
Average sunshine in September
Princesa Isabel, Brazil
- Average daylight in September: 12h and 6min
The month with the longest days is December (Average daylight: 12h and 36min).
The month with the shortest days is June (Average daylight: 11h and 42min).
- Average sunshine in September: 9h and 6min
The month with the most sunshine is October (Average sunshine: 9h and 24min).
The month with the least sunshine is July (Average sunshine: 7h and 0min).
Average sunshine days in September
Princesa Isabel, Brazil
- Average sunshine days in September: 25.6 days
The month with the most sunshine days is September (25.6 days).
The month with the least sunshine days is February (8 days).
Average UV index in September
Princesa Isabel, Brazil
- Average UV index in September: 7
The months with the highest UV index are February, March, September, October, November and December (UV index 7).
The months with the lowest UV index are January, April, May, June, July and August (UV index 6).
Average cloud cover in September
Princesa Isabel, Brazil
- Average cloud cover in September: 24
The month with the most cloud cover is July (Cloud cover 47).
The months with the least cloud cover are September and October (Cloud cover 24).
Average visibility in September
Princesa Isabel, Brazil
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, August, September, October, November and December (10km).
The month with the lowest visibility is May (8km).
