September weather forecast and climate
Rioviejito, Colombia

Weather in September

The first month of the autumn, September, is still a tropical month in Rioviejito, Colombia, with average temperature varying between 20.7°C (69.3°F) and 31.5°C (88.7°F).

Temperature

In Rioviejito, the average high-temperature is relatively the same as in August - a still tropical 31.5°C (88.7°F). In Rioviejito, the average low-temperature is 20.7°C (69.3°F).

Heat index

In September, the average heat index is estimated at a very hot 39.3°C (102.7°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the 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 'real feel', 'apparent temperature', 'felt air temperature', or 'feels like', 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 (metabolic differences, pregnancy, clothing). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Rioviejito, the average relative humidity is 71%.

Rainfall

In Rioviejito, during September, the rain falls for 23.4 days and regularly aggregates up to 151mm (5.94") of precipitation. In Rioviejito, during the entire year, the rain falls for 233 days and collects up to 1320mm (51.97") of precipitation.

Daylight

In Rioviejito, the average length of the day in September is 12.2h.

Sunshine

In September, the average sunshine is 9.3h.

UV index

September through December, with an average maximum UV index of 6, are months with the lowest UV index in Rioviejito. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 6 in September transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Rioviejito?

The average high-temperature, in September, in Rioviejito, Colombia, is 31.5°C (88.7°F), while the average low-temperature is 20.7°C (69.3°F). In September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), that combines air temperature and relative humidity, is evaluated at 39.3°C (102.7°F).

What is the average humidity in September in Rioviejito?

In September, the average relative humidity in Rioviejito is 71%.

How many days does it rain in September in Rioviejito?

In Rioviejito, in September, it is raining for 23.4 days, with typically 151mm (5.94") of accumulated precipitation.

How many hours of daylight does Rioviejito have in September?

In Rioviejito, the average length of the day in September is 12.2h.

How long on average sun shines in September in Rioviejito?

In Rioviejito, the average sunshine in September is 9.3h.

What is the month with the lowest UV index in Rioviejito?

September through December, with an average maximum UV index of 6, are months with the lowest UV index.

How high is the UV index in September in Rioviejito?

The average daily maximum UV index in September in Rioviejito, Colombia, is 6. A UV Index reading of 6 to 7 represents a high hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
Rioviejito, Colombia

Average temperature in September - Rioviejito, Colombia
  • Average high temperature in September: 31.5°C

The warmest month (with the highest average high temperature) is February (34°C).
The month with the lowest average high temperature is November (30.2°C).

  • Average low temperature in September: 20.7°C

Months with the highest average low temperature are March and April (22°C).
The coldest month (with the lowest average low temperature) is December (20.4°C).

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Average pressure in September
Rioviejito, Colombia

Average pressure in September - Rioviejito, Colombia
  • Average pressure in September: 1010.7mbar

Months with the highest atmospheric pressure are January and June (1010.8mbar).
The month with the lowest atmospheric pressure is November (1010.1mbar).

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Average wind speed in September
Rioviejito, Colombia

Average wind speed in September - Rioviejito, Colombia
  • Average wind speed in September: 4.6km/h

The windiest month (with the highest average wind speed) is January (5.2km/h).
The calmest month (with the lowest average wind speed) is April (4.2km/h).

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Average humidity in September
Rioviejito, Colombia

Average humidity in September - Rioviejito, Colombia
  • Average humidity in September: 71%

Months with the highest relative humidity are October and November (76%).
The month with the lowest relative humidity is February (59%).

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Average rainfall in September
Rioviejito, Colombia

Average rainfall in September - Rioviejito, Colombia
  • Average rainfall in September: 151mm

The wettest month (with the highest rainfall) is October (223mm).
The driest month (with the least rainfall) is January (20mm).

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Average rainfall days in September
Rioviejito, Colombia

Average rainfall days in September - Rioviejito, Colombia
  • Average rainfall days in September: 23.4 days

The month with the highest number of rainy days is October (26.8 days).
The month with the least rainy days is January (8.4 days).

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Average daylight in September /
Average sunshine in September
Rioviejito, Colombia

Average daylight in September / Average sunshine in September - Rioviejito, Colombia
  • Average daylight in September: 12.2h

The month with the longest days is June (Average daylight: 12.6h).
Months with the shortest days are January and December (Average daylight: 11.7h).

  • Average sunshine in September: 9.3h

The month with the most sunshine is August (Average sunshine: 11.3h).
The month with the least sunshine is January (Average sunshine: 7.7h).

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Average sunshine days in September
Rioviejito, Colombia

Average sunshine days in September - Rioviejito, Colombia
  • Average sunshine days in September: 5.5 days

The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is October (3.2 days).

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Average UV index in September
Rioviejito, Colombia

Average UV index in September - Rioviejito, Colombia
  • Average UV index in September: 6

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

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Average cloud cover in September
Rioviejito, Colombia

Average cloud cover in September - Rioviejito, Colombia
  • Average cloud cover in September: 32

The month with the most cloud cover is October (Cloud cover 42).
The month with the least cloud cover is January (Cloud cover 17).

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Average visibility in September
Rioviejito, Colombia

Average visibility in September - Rioviejito, Colombia
  • Average visibility in September: 9km

Months with the highest visibility are January, February, March, August and December (10km).
Months with the lowest visibility are April, May, June, July, September, October and November (9km).

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