September weather forecastArco-Íris, Brazil
September
Weather in September
September, the first month of the spring in Arco-Íris, is a tropical month, with temperature in the range of an average low of 17.8°C (64°F) and an average high of 30.3°C (86.5°F).Temperature
At the onset of September, Arco-Íris records an average high-temperature of a hot 30.3°C (86.5°F), showing little deviation from the preceding month. Arco-Íris reports a steady low-temperature average of 17.8°C (64°F) throughout September, revealing a large deviation from the daytime high.Heat index
The heat index value during September is calculated to be a hot 33°C (91.4°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.The standards for the heat index are set for locations in shade and under light breezes. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', is the result of factoring in humidity to the air temperature, indicating perceived warmth. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
In September, the average relative humidity in Arco-Íris is 59%.Rainfall
In Arco-Íris, Brazil, in September, during 9.5 rainfall days, 47mm (1.85") of precipitation is typically accumulated. Throughout the year, in Arco-Íris, there are 193.5 rainfall days, and 1136mm (44.72") of precipitation is accumulated.Daylight
In September, the average length of the day in Arco-Íris is 11h and 59min.On the first day of September, sunrise is at 06:30 and sunset at 18:12. On the last day of the month, sunrise is at 06:02 and sunset at 18:20 -03.
Sunshine
The average sunshine in September in Arco-Íris is 9.1h.UV index
January through March, July through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 6 during September leads to these advisories:
Shun overexposure. Protection from sun ravages is indispensable. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Arco-Íris, Brazil
- Average high temperature in September: 30.3°C
The warmest month (with the highest average high temperature) is October (30.8°C).
The month with the lowest average high temperature is June (24°C).
- Average low temperature in September: 17.8°C
The months with the highest average low temperature are January and February (20.8°C).
The coldest month (with the lowest average low temperature) is July (14.8°C).
Average pressure in September
Arco-Íris, Brazil
- Average pressure in September: 1014.2mbar
The month with the highest atmospheric pressure is July (1018.1mbar).
The month with the lowest atmospheric pressure is December (1009.9mbar).
Average wind speed in September
Arco-Íris, Brazil
- Average wind speed in September: 11.1km/h
The windiest month (with the highest average wind speed) is August (11.4km/h).
The calmest month (with the lowest average wind speed) is February (7.8km/h).
Average humidity in September
Arco-Íris, Brazil
- Average humidity in September: 59%
The month with the highest relative humidity is March (84%).
The month with the lowest relative humidity is August (58%).
Average rainfall in September
Arco-Íris, Brazil
- Average rainfall in September: 47mm
The wettest month (with the highest rainfall) is January (203mm).
The driest month (with the least rainfall) is August (20mm).
Average rainfall days in September
Arco-Íris, Brazil
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is January (28.3 days).
The month with the least rainy days is August (5.1 days).
Average daylight in September /
Average sunshine in September
Arco-Íris, Brazil
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 24min).
The month with the shortest days is June (Average daylight: 10h and 48min).
- Average sunshine in September: 9h and 6min
The month with the most sunshine is August (Average sunshine: 9h and 24min).
The month with the least sunshine is January (Average sunshine: 7h and 0min).
Average sunshine days in September
Arco-Íris, Brazil
- Average sunshine days in September: 19.7 days
The month with the most sunshine days is August (25.3 days).
The month with the least sunshine days is January (2.6 days).
Average UV index in September
Arco-Íris, Brazil
- Average UV index in September: 6
The months with the highest UV index are January, February, March, July, August, September, October, November and December (UV index 6).
The months with the lowest UV index are April, May and June (UV index 5).
Average cloud cover in September
Arco-Íris, Brazil
- Average cloud cover in September: 21
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in September
Arco-Íris, Brazil
- Average visibility in September: 9km
The month with the highest visibility is August (10km).
The months with the lowest visibility are January, February, March, April and May (8km).
