September weather forecastMamonas, Brazil
September
Weather in September
September, the first month of the spring in Mamonas, is a tropical month, with an average temperature varying between 31°C (87.8°F) and 16.8°C (62.2°F).Temperature
Mamonas experiences a transition to a tropical 31°C (87.8°F) in average high-temperatures with the arrival of September, not greatly differing from August's 28.5°C (83.3°F). Mamonas, after an intense day, registers a significant cooling to an average low-temperature of 16.8°C (62.2°F) throughout September.Heat index
The heat index value during September is computed to be a tropical 33°C (91.4°F). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.Know that the heat index computations account for shaded terrains and slight winds. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', melds the effects of warmth and moisture to generate a feeling of heat. 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. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Humidity
The least humid month is September, with an average relative humidity of 54%.Rainfall
In September, the rain falls for 3.7 days. Throughout September, 6mm (0.24") of precipitation is accumulated. Throughout the year, in Mamonas, Brazil, there are 151.8 rainfall days, and 685mm (26.97") of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 1min.On the first day of the month, sunrise is at 05:56 and sunset at 17:46. On the last day of September, in Mamonas, sunrise is at 05:34 and sunset at 17:48 -03.
Sunshine
September has the most sunshine of the year, with an average of 9.8h of sunshine.UV index
The month with the highest UV index is September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.Note: A maximum high UV index of 7 in September translates into the following recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mamonas, Brazil
- Average high temperature in September: 31°C
The warmest month (with the highest average high temperature) is October (31.1°C).
The month with the lowest average high temperature is June (26.2°C).
- Average low temperature in September: 16.8°C
The month with the highest average low temperature is November (19.2°C).
The coldest month (with the lowest average low temperature) is July (14.9°C).
Average pressure in September
Mamonas, Brazil
- Average pressure in September: 1016.5mbar
The month with the highest atmospheric pressure is July (1019.5mbar).
The month with the lowest atmospheric pressure is November (1012.6mbar).
Average wind speed in September
Mamonas, Brazil
- Average wind speed in September: 11.4km/h
The windiest month (with the highest average wind speed) is August (11.8km/h).
The calmest month (with the lowest average wind speed) is March (7.4km/h).
Average humidity in September
Mamonas, Brazil
- Average humidity in September: 54%
The month with the highest relative humidity is March (79%).
The month with the lowest relative humidity is September (54%).
Average rainfall in September
Mamonas, Brazil
- Average rainfall in September: 6mm
The wettest month (with the highest rainfall) is November (125mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in September
Mamonas, Brazil
- Average rainfall days in September: 3.7 days
The month with the highest number of rainy days is December (23 days).
The month with the least rainy days is August (1.5 days).
Average daylight in September /
Average sunshine in September
Mamonas, Brazil
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 0min).
The month with the shortest days is June (Average daylight: 11h and 18min).
- 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 November (Average sunshine: 8h and 6min).
Average sunshine days in September
Mamonas, Brazil
- Average sunshine days in September: 25.5 days
The month with the most sunshine days is July (28.3 days).
The month with the least sunshine days is November (6.7 days).
Average UV index in September
Mamonas, 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 June and July (UV index 5).
Average cloud cover in September
Mamonas, Brazil
- Average cloud cover in September: 16
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is September (Cloud cover 16).
Average visibility in September
Mamonas, 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, March, April and December (8km).
