Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Santa Isabel do Rio Negro records the warmest temperatures in September, averaging a high of 33.5°C (92.3°F) and a low of 22.4°C (72.3°F).Heat index
In September, the average heat index is estimated at a burning hot 48°C (118.4°F). Stay mindful: Heat exhaustion and heat cramps are likely. Heatstroke could follow extended physical effort.Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', quantifies the warmth felt when relative humidity is considered. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.
Humidity
The least humid month in Santa Isabel do Rio Negro, Brazil, is September, with an average relative humidity of 76%.Rainfall
September is the month with the least rainfall. Rain falls for 21.9 days and accumulates 75mm (2.95") of precipitation.Daylight
The average length of the day in September is 12h and 7min.On the first day of September, sunrise is at 06:16 and sunset at 18:23. On the last day of the month, sunrise is at 06:06 and sunset at 18:13 -04.
Sunshine
The month with the most sunshine is September, with an average of 8.4h of sunshine.UV index
July through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In September, a daily UV index of 7 turns into the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the hottest?
How hot does it get in September?
What is the least humid month?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
What is the average length of the day in September in Santa Isabel do Rio Negro?
When are sunrise and sunset in September?
What month has the most sunshine?
How many hours of sunshine does Santa Isabel do Rio Negro have in September?
What is the month with the highest UV index?
How high is the UV index in September?
Average temperature in September
Santa Isabel do Rio Negro, Brazil
- Average high temperature in September: 33.5°C
The warmest month (with the highest average high temperature) is September (33.5°C).
The month with the lowest average high temperature is May (29.7°C).
- Average low temperature in September: 22.4°C
The month with the highest average low temperature is October (23.3°C).
The coldest month (with the lowest average low temperature) is July (21.3°C).
Average pressure in September
Santa Isabel do Rio Negro, Brazil
- Average pressure in September: 1011mbar
The month with the highest atmospheric pressure is July (1013mbar).
The month with the lowest atmospheric pressure is November (1008.4mbar).
Average wind speed in September
Santa Isabel do Rio Negro, Brazil
- Average wind speed in September: 3.9km/h
The windiest month (with the highest average wind speed) is February (4.3km/h).
The calmest months (with the lowest average wind speed) are May and June (3.5km/h).
Average humidity in September
Santa Isabel do Rio Negro, Brazil
- Average humidity in September: 76%
The month with the highest relative humidity is May (91%).
The month with the lowest relative humidity is September (76%).
Average rainfall in September
Santa Isabel do Rio Negro, Brazil
- Average rainfall in September: 75mm
The wettest month (with the highest rainfall) is May (242mm).
The driest month (with the least rainfall) is September (75mm).
Average rainfall days in September
Santa Isabel do Rio Negro, Brazil
- Average rainfall days in September: 21.9 days
The month with the highest number of rainy days is May (29.5 days).
The month with the least rainy days is September (21.9 days).
Average daylight in September /
Average sunshine in September
Santa Isabel do Rio Negro, Brazil
- Average daylight in September: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 6min).
The month with the shortest days is June (Average daylight: 12h and 6min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is September (Average sunshine: 8h and 24min).
The month with the least sunshine is May (Average sunshine: 5h and 6min).
Average sunshine days in September
Santa Isabel do Rio Negro, Brazil
- Average sunshine days in September: 6.9 days
The month with the most sunshine days is August (7.3 days).
The months with the least sunshine days are May and June (1.1 days).
Average UV index in September
Santa Isabel do Rio Negro, Brazil
- Average UV index in September: 7
The months with the highest UV index are July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May and June (UV index 6).
Average cloud cover in September
Santa Isabel do Rio Negro, Brazil
- Average cloud cover in September: 42
The month with the most cloud cover is May (Cloud cover 72).
The month with the least cloud cover is September (Cloud cover 42).
Average visibility in September
Santa Isabel do Rio Negro, Brazil
- Average visibility in September: 8km
The months with the highest visibility are August, September and October (8km).
The month with the lowest visibility is May (5km).
Santa Isabel do Rio Negro, Brazil
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