September weather forecastLassance, Brazil
September
Weather in September
September, the first month of the spring in Lassance, is still a hot month, with an average temperature ranging between min 18.4°C (65.1°F) and max 32.5°C (90.5°F).Temperature
September, marked by an average high-temperature of 32.5°C (90.5°F) and a low-temperature of 18.4°C (65.1°F), is the warmest month.Heat index
The heat index value for September is evaluated at a sweltering 35°C (95°F). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', melds the effects of warmth and moisture to generate a feeling of heat. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. 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 hold particular importance for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.
Humidity
The least humid month in Lassance is September, with an average relative humidity of 48%.Rainfall
In Lassance, during September, the rain falls for 5.5 days and regularly aggregates up to 11mm (0.43") of precipitation. Throughout the year, in Lassance, Brazil, there are 177.2 rainfall days, and 998mm (39.29") of precipitation is accumulated.Daylight
In Lassance, the average length of the day in September is 12h and 0min.On the first day of September in Lassance, sunrise is at 06:04 and sunset at 17:51. On the last day of the month, sunrise is at 05:40 and sunset at 17:55 -03.
Sunshine
September has the most sunshine of the year in Lassance, with an average of 9.8h of sunshine.UV index
With an average maximum UV index of 7, September is the month with the highest UV index in Lassance. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 7 in September translates into these instructions:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lassance, Brazil
- Average high temperature in September: 32.5°C
The warmest month (with the highest average high temperature) is September (32.5°C).
The months with the lowest average high temperature are May and June (27°C).
- Average low temperature in September: 18.4°C
The month with the highest average low temperature is October (20.6°C).
The coldest month (with the lowest average low temperature) is July (15°C).
Average pressure in September
Lassance, Brazil
- Average pressure in September: 1015.6mbar
The month with the highest atmospheric pressure is July (1019mbar).
The months with the lowest atmospheric pressure are November and December (1011.8mbar).
Average wind speed in September
Lassance, Brazil
- Average wind speed in September: 9.6km/h
The windiest month (with the highest average wind speed) is September (9.6km/h).
The calmest month (with the lowest average wind speed) is March (6.1km/h).
Average humidity in September
Lassance, Brazil
- Average humidity in September: 48%
The month with the highest relative humidity is March (84%).
The month with the lowest relative humidity is September (48%).
Average rainfall in September
Lassance, Brazil
- Average rainfall in September: 11mm
The wettest month (with the highest rainfall) is December (195mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in September
Lassance, Brazil
- Average rainfall days in September: 5.5 days
The month with the highest number of rainy days is December (26.7 days).
The month with the least rainy days is July (1.5 days).
Average daylight in September /
Average sunshine in September
Lassance, 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 6min).
- Average sunshine in September: 9h and 48min
The month with the most sunshine is September (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 7h and 36min).
Average sunshine days in September
Lassance, Brazil
- Average sunshine days in September: 23.1 days
The month with the most sunshine days is July (28.9 days).
The month with the least sunshine days is December (3.2 days).
Average UV index in September
Lassance, Brazil
- Average UV index in September: 7
The month with the highest UV index is September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).
Average cloud cover in September
Lassance, Brazil
- Average cloud cover in September: 15
The months with the most cloud cover are March and December (Cloud cover 49).
The months with the least cloud cover are August and September (Cloud cover 15).
Average visibility in September
Lassance, Brazil
- Average visibility in September: 10km
The months with the highest visibility are July, August, September and October (10km).
The months with the lowest visibility are January, February, March, April, May and December (8km).
