September weather forecastSão Mateus, Brazil
September
Weather in September
The first month of the spring, September, is still a warm month in São Mateus, Brazil, with an average temperature fluctuating between 20.2°C (68.4°F) and 26.6°C (79.9°F).Temperature
The shift into September uncovers an average high-temperature of a still moderately hot 26.6°C (79.9°F), subtly different from the previous month. São Mateus usually reports an average low-temperature of 20.2°C (68.4°F) during the month of September.Humidity
September is the least humid month, with an average relative humidity of 76%.Rainfall
The month with the least rainfall in São Mateus is September, when the rain falls for 11.1 days and typically collects 17mm (0.67") of precipitation.Daylight
In September, the average length of the day is 12h and 0min.On the first day of the month, sunrise is at 05:46 and sunset at 17:32. On the last day of September, sunrise is at 05:21 and sunset at 17:37 -03.
Sunshine
The average sunshine in September in São Mateus is 8h.UV index
April through November, with an average maximum UV index of 6, are months with the lowest UV index. 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: The daily high UV index of 6 during September translates into the following recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
São Mateus, Brazil
- Average high temperature in September: 26.6°C
The warmest month (with the highest average high temperature) is February (30.1°C).
The month with the lowest average high temperature is July (25.7°C).
- Average low temperature in September: 20.2°C
The month with the highest average low temperature is February (23.2°C).
The coldest month (with the lowest average low temperature) is July (19.2°C).
Average pressure in September
São Mateus, Brazil
- Average pressure in September: 1018.6mbar
The month with the highest atmospheric pressure is July (1020.5mbar).
The month with the lowest atmospheric pressure is December (1012.8mbar).
Average wind speed in September
São Mateus, Brazil
- Average wind speed in September: 13.1km/h
The windiest month (with the highest average wind speed) is October (13.2km/h).
The calmest month (with the lowest average wind speed) is April (9.7km/h).
Average humidity in September
São Mateus, Brazil
- Average humidity in September: 76%
The months with the highest relative humidity are March, April, June, November and December (82%).
The month with the lowest relative humidity is September (76%).
Average rainfall in September
São Mateus, Brazil
- Average rainfall in September: 17mm
The wettest month (with the highest rainfall) is December (143mm).
The driest month (with the least rainfall) is September (17mm).
Average rainfall days in September
São Mateus, Brazil
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is March (20.7 days).
The month with the least rainy days is September (11.1 days).
Average daylight in September /
Average sunshine in September
São Mateus, Brazil
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 12min).
The month with the shortest days is June (Average daylight: 11h and 0min).
- Average sunshine in September: 8h
The month with the most sunshine is February (Average sunshine: 9h).
The month with the least sunshine is October (Average sunshine: 7h).
Average sunshine days in September
São Mateus, Brazil
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is May (15.9 days).
The month with the least sunshine days is March (7.8 days).
Average UV index in September
São Mateus, Brazil
- Average UV index in September: 6
The months with the highest UV index are January, February, March and December (UV index 7).
The months with the lowest UV index are April, May, June, July, August, September, October and November (UV index 6).
Average cloud cover in September
São Mateus, Brazil
- Average cloud cover in September: 40
The month with the most cloud cover is November (Cloud cover 52).
The month with the least cloud cover is February (Cloud cover 32).
Average visibility in September
São Mateus, Brazil
- Average visibility in September: 10km
The months with the highest visibility are February, August, September and October (10km).
The months with the lowest visibility are January, March, April, May, June, July, November and December (9km).
