September weather forecast
Cartagena, Colombia

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The Chiva Rumbera buildings and a skyscape of the city of Cartagena, Colombia
The Chiva Rumbera buildings and a skyscape of the city of Cartagena, Colombia

Weather in September

September is the wettest month of the year in Cartagena, with rainfall topping out at 150mm (5.91"). This peak in precipitation coincides with a slight dip in temperature, reflecting the city’s tropical rainforest climate. However, the weather stays reasonably warm, buffering the increased rainfall. Visitors can still enjoy a dip in the sea, given the constant sea temperatures. Despite the heightened rainfall and increased cloud cover, daylight hours are plentiful, encouraging outdoor activities.

Temperature

Cartagena records an average high-temperature of a still hot 30.5°C (86.9°F) as September arrives, nearly mirroring the previous month's climate. Cartagena, in the month of September, notes an average low temperature of 26.8°C (80.2°F), indicating a small decrease from the daytime highs.

Heat index

September's heat index is calculated to be a torrid 38°C (100.4°F). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is the outcome of merging air's temperature and its humidity metrics. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

In September, the average relative humidity is 77%.

Rainfall

In September, in Cartagena, the rain falls for 25.5 days. Throughout September, 150mm (5.91") of precipitation is accumulated. In Cartagena, Colombia, during the entire year, the rain falls for 210.6 days and collects up to 1115mm (43.9") of precipitation.

Sea temperature

In Cartagena, in September, the average water temperature is 29.7°C (85.5°F).
Note: Surface water temperatures between 25°C (77°F) and 29°C (84.2°F) offer outstanding conditions for any water activity, providing extreme pleasure for extended periods.

Daylight

In Cartagena, the average length of the day in September is 12h and 11min.
On the first day of the month, sunrise is at 05:52 and sunset at 18:11. On the last day of September, in Cartagena, sunrise is at 05:50 and sunset at 17:52 -05.

Sunshine

The average sunshine in September is 10.2h.

UV index

The months with the highest UV index in Cartagena are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Cartagena are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Be attentive! The UV exposure is heightened with reflections from sand and water.
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Frequently asked questions

How hot does it get in Cartagena in September?

In September, the average high-temperature and low-temperature are 30.5°C (86.9°F) and 26.8°C (80.2°F) respectively. In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is calculated to be 38°C (100.4°F).

What is the average humidity in September in Cartagena?

In September, the average relative humidity is 77%.

How much does it rain in Cartagena in September?

In Cartagena, in September, it is raining for 25.5 days, with typically 150mm (5.91") of accumulated precipitation.

What is the sea water temperature in September in Cartagena?

In September, the average sea temperature is 29.7°C (85.5°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

How many hours of daylight does Cartagena have in September?

The average day length in September in Cartagena is 12h and 11min.

When is the sunrise / sunset in September in Cartagena?

On the first day of September in Cartagena, sunrise is at 05:52 and sunset at 18:11. On the last day of the month, sunrise is at 05:50 and sunset at 17:52 -05.

How many hours of sunshine does Cartagena have in September?

In Cartagena, Colombia, the average sunshine duration in September is 10.2h.

What are the months with the highest UV index in Cartagena?

The months with the highest UV index in Cartagena, Colombia, are January through December, with an average maximum UV index of 7.

What are the months with the lowest UV index in Cartagena?

The months with the lowest UV index in Cartagena, Colombia, are January through December, with an average maximum UV index of 7.

What is the UV index intensity in September in Cartagena?

The average daily maximum UV index in September in Cartagena, Colombia, is 7. A UV Index reading of 6 to 7 represents a high hazard to health from unprotected exposure to UV radiation.

Average temperature in September
Cartagena, Colombia

Average temperature in September - Cartagena, Colombia
  • Average high temperature in September: 30.5°C

The warmest months (with the highest average high temperature) are February, June and July (31.1°C).
The months with the lowest average high temperature are October and November (29.8°C).

  • Average low temperature in September: 26.8°C

The month with the highest average low temperature is June (26.9°C).
The coldest month (with the lowest average low temperature) is January (25.8°C).

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Average pressure in September
Cartagena, Colombia

Average pressure in September - Cartagena, Colombia
  • Average pressure in September: 1009.5mbar

The month with the highest atmospheric pressure is January (1009.6mbar).
The month with the lowest atmospheric pressure is November (1008.9mbar).

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Average wind speed in September
Cartagena, Colombia

Average wind speed in September - Cartagena, Colombia
  • Average wind speed in September: 11.1km/h

The windiest month (with the highest average wind speed) is March (22km/h).
The calmest month (with the lowest average wind speed) is October (10.9km/h).

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Average humidity in September
Cartagena, Colombia

Average humidity in September - Cartagena, Colombia
  • Average humidity in September: 77%

The month with the highest relative humidity is November (79%).
The month with the lowest relative humidity is February (71%).

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Average rainfall in September
Cartagena, Colombia

Average rainfall in September - Cartagena, Colombia
  • Average rainfall in September: 150mm

The wettest month (with the highest rainfall) is October (221mm).
The driest month (with the least rainfall) is February (3mm).

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Average rainfall days in September
Cartagena, Colombia

Average rainfall days in September - Cartagena, Colombia
  • Average rainfall days in September: 25.5 days

The month with the highest number of rainy days is October (28.2 days).
The month with the least rainy days is February (2.6 days).

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Average sea temperature in September
Cartagena, Colombia

Average sea temperature in September - Cartagena, Colombia
  • Average sea temperature in September: 29.7°C

The best month for swimming (with the highest average sea temperature) is August (29.8°C).
The coldest month (with the lowest average sea temperature) is February (27.3°C).

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

Average daylight in September / Average sunshine in September - Cartagena, Colombia
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 30min).

  • Average sunshine in September: 10h and 1min

The month with the most sunshine is April (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 7h and 24min).

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Average sunshine days in September
Cartagena, Colombia

Average sunshine days in September - Cartagena, Colombia
  • Average sunshine days in September: 2.8 days

The month with the most sunshine days is January (25.9 days).
The month with the least sunshine days is October (1.9 days).

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Average UV index in September
Cartagena, Colombia

Average UV index in September - Cartagena, Colombia
  • Average UV index in September: 7

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

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Average cloud cover in September
Cartagena, Colombia

Average cloud cover in September - Cartagena, Colombia
  • Average cloud cover in September: 31

The month with the most cloud cover is October (Cloud cover 38).
The month with the least cloud cover is January (Cloud cover 15).

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Average visibility in September
Cartagena, Colombia

Average visibility in September - Cartagena, Colombia
  • Average visibility in September: 10km

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

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Cartagena, Colombia

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