September weather forecast
Riberalta, Bolivia

Weather in September

September, the first month of the spring, in Riberalta, is also a sweltering month, with average temperature varying between 22.5°C (72.5°F) and 35.8°C (96.4°F).

Temperature

With an average high-temperature of 35.8°C (96.4°F) and an average low-temperature of 22.5°C (72.5°F), September is the warmest month.

Heat index

The average heat index is appraised at a burning hot 45.4°C (113.7°F). Be wary: Heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'feels like', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (clothing, wind, differences in body mass, height, and shape). Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

In September, the average relative humidity is 56%.

Rainfall

In Riberalta, in September, during 10.6 rainfall days, 28mm (1.1") of precipitation is typically accumulated. Throughout the year, in Riberalta, Bolivia, there are 224 rainfall days, and 1199mm (47.2") of precipitation is accumulated.

Daylight

The average length of the day in September is 12.1h.

Sunshine

In Riberalta, the average sunshine is 9.2h.

UV index

July through November, with an average maximum UV index of 7, are months with the highest UV index in Riberalta. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to the Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the warmest month in Riberalta?

September is the warmest month, with an average high-temperature of 35.8°C (96.4°F) and an average low-temperature of 22.5°C (72.5°F).

What is the temperature in September in Riberalta?

In September, in Riberalta, Bolivia, the average high-temperature is 35.8°C (96.4°F), and the average low-temperature is 22.5°C (72.5°F). In September, the average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, is appraised at 45.4°C (113.7°F).

What is the average humidity in September in Riberalta?

In September, the average relative humidity in Riberalta, Bolivia, is 56%.

How much does it rain in Riberalta in September?

In Riberalta, Bolivia, during September, the rain falls for 10.6 days and regularly aggregates up to 28mm (1.1") of precipitation.

How many hours of daylight does Riberalta have in September?

In September, the average length of the day in Riberalta is 12.1h.

How many hours of sunshine does Riberalta have in September?

The average sunshine in September in Riberalta is 9.2h.

When is the highest UV index in Riberalta?

Months with the highest UV index in Riberalta are July through November, with an average maximum UV index of 7.

What is the UV index reading in September in Riberalta?

In September, the average daily maximum UV index is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in September
Riberalta, Bolivia

Average temperature in September - Riberalta, Bolivia
  • Average high temperature in September: 35.8°C

The warmest month (with the highest average high temperature) is September (35.8°C).
The month with the lowest average high temperature is February (29.3°C).

  • Average low temperature in September: 22.5°C

The month with the highest average low temperature is October (22.9°C).
The coldest month (with the lowest average low temperature) is July (19.3°C).

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Average pressure in September
Riberalta, Bolivia

Average pressure in September - Riberalta, Bolivia
  • Average pressure in September: 1011mbar

Months with the highest atmospheric pressure are June and July (1013.7mbar).
The month with the lowest atmospheric pressure is November (1008.4mbar).

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Average wind speed in September
Riberalta, Bolivia

Average wind speed in September - Riberalta, Bolivia
  • Average wind speed in September: 4.9km/h

The windiest months (with the highest average wind speed) are August, September and December (4.9km/h).
The calmest months (with the lowest average wind speed) are March, April and May (4.2km/h).

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Average humidity in September
Riberalta, Bolivia

Average humidity in September - Riberalta, Bolivia
  • Average humidity in September: 56%

The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is August (52%).

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Average rainfall in September
Riberalta, Bolivia

Average rainfall in September - Riberalta, Bolivia
  • Average rainfall in September: 28mm

The wettest month (with the highest rainfall) is February (196mm).
The driest month (with the least rainfall) is July (8mm).

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Average rainfall days in September
Riberalta, Bolivia

Average rainfall days in September - Riberalta, Bolivia
  • Average rainfall days in September: 10.6 days

The month with the highest number of rainy days is January (28.5 days).
The month with the least rainy days is July (4.4 days).

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Average daylight in September /
Average sunshine in September
Riberalta, Bolivia

Average daylight in September / Average sunshine in September - Riberalta, Bolivia
  • Average daylight in September: 12.1h

The month with the longest days is December (Average daylight: 12.8h).
Months with the shortest days are June and July (Average daylight: 11.5h).

  • Average sunshine in September: 9.2h

The month with the most sunshine is August (Average sunshine: 9.6h).
The month with the least sunshine is February (Average sunshine: 4.9h).

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Average sunshine days in September
Riberalta, Bolivia

Average sunshine days in September - Riberalta, Bolivia
  • Average sunshine days in September: 17.6 days

The month with the most sunshine days is July (25.9 days).
The month with the least sunshine days is February (0.8 days).

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Average UV index in September
Riberalta, Bolivia

Average UV index in September - Riberalta, Bolivia
  • Average UV index in September: 7

Months with the highest UV index are July, August, September, October and November (UV index 7).
Months with the lowest UV index are January, February, March, April, May, June and December (UV index 6).

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Average cloud cover in September
Riberalta, Bolivia

Average cloud cover in September - Riberalta, Bolivia
  • Average cloud cover in September: 27

The month with the most cloud cover is February (Cloud cover 74).
The month with the least cloud cover is August (Cloud cover 19).

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Average visibility in September
Riberalta, Bolivia

Average visibility in September - Riberalta, Bolivia
  • Average visibility in September: 10km

Months with the highest visibility are August and September (10km).
The month with the lowest visibility is February (5km).

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