September weather forecastBastos, Brazil
September
Weather in September
September, the first month of the spring in Bastos, is a tropical month, with an average temperature varying between 17.8°C (64°F) and 30.3°C (86.5°F).Temperature
The shift into September records an average high-temperature of a tropical 30.3°C (86.5°F), subtly varied from August's 28°C (82.4°F). Bastos records a consistent low-temperature average of 17.8°C (64°F) during September, indicating a significant difference from the daytime heat.Heat index
During September, the heat index is calculated to be a tropical 33°C (91.4°F). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. 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. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Humidity
In September, the average relative humidity is 59%.Rainfall
In Bastos, in September, during 9.5 rainfall days, 47mm (1.85") of precipitation is typically accumulated. In Bastos, during the entire year, the rain falls for 193.5 days and collects up to 1136mm (44.72") of precipitation.Daylight
In Bastos, Brazil, the average length of the day in September is 11h and 59min.On the first day of the month, sunrise is at 06:31 and sunset at 18:13. On the last day of September, sunrise is at 06:03 and sunset at 18:21 -03.
Sunshine
In September, the average sunshine in Bastos, Brazil, 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 in Bastos. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: A daily maximum UV index of 6 in September translates into the following instructions:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bastos, 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
Bastos, 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
Bastos, 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
Bastos, 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
Bastos, 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
Bastos, 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
Bastos, 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
Bastos, 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
Bastos, 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
Bastos, 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
Bastos, 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).
