January weather forecast and climate
Cartagena, Costa Rica

Weather in January

January is a hot winter month in Cartagena, Costa Rica, with temperature in the range of an average high of 30.4°C (86.7°F) and an average low of 23°C (73.4°F).

Temperature

In January, the average high-temperature is almost the same as in December - a hot 30.4°C (86.7°F). In January, in Cartagena, the average low-temperature is 23°C (73.4°F).

Heat index

The average heat index is calculated to be a torrid 36.3°C (97.3°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 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', 'felt air temperature', 'feels like', or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like activity, clothing, differences in body mass, height, and shape, and pregnancy affect individual temperature impact. 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.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. 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 January, the average relative humidity in Cartagena is 71%.

Rainfall

In Cartagena, during January, the rain falls for 1.2 days and regularly aggregates up to 2mm (0.08") of precipitation. Throughout the year, there are 137.5 rainfall days, and 624mm (24.57") of precipitation is accumulated.

Daylight

The average length of the day in Cartagena is 11.6h.

Sunshine

With an average of 7.6h of sunshine, January has the least sunshine of the year in Cartagena, Costa Rica.

UV index

Months with the highest UV index in Cartagena are January through December, with an average maximum UV index of 7. Months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In January, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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 January in Cartagena?

In January, in Cartagena, the average high-temperature is 30.4°C (86.7°F), and the average low-temperature is 23°C (73.4°F). In January, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which represents the influence of relative humidity on air temperature, is calculated to be 36.3°C (97.3°F).

What is the average humidity in January in Cartagena?

In Cartagena, the average relative humidity in January is 71%.

How much does it rain in Cartagena in January?

In Cartagena, in January, it is raining for 1.2 days, with typically 2mm (0.08") of accumulated precipitation.

How many hours of daylight does Cartagena have in January?

The average length of the day in January in Cartagena is 11.6h.

What is the month with the least sunshine in Cartagena?

The month with the least sunshine is January, with an average of 7.6h of sunshine.

How many hours of sunshine does Cartagena have in January?

The average sunshine in January in Cartagena, Costa Rica, is 7.6h.

What is the month with the highest UV index in Cartagena?

Months with the highest UV index are January through December, with an average maximum UV index of 7.

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

Months with the lowest UV index are January through December, with an average maximum UV index of 7.

How high is the UV index in January in Cartagena?

In Cartagena, Costa Rica, the average daily maximum UV index in January is 7. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays.

Average temperature in January
Cartagena, Costa Rica

Average temperature in January - Cartagena, Costa Rica
  • Average high temperature in January: 30.4°C

The warmest month (with the highest average high temperature) is April (33.4°C).
The month with the lowest average high temperature is October (28.7°C).

  • Average low temperature in January: 23°C

The month with the highest average low temperature is May (25.8°C).
The coldest month (with the lowest average low temperature) is January (23°C).

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Average pressure in January
Cartagena, Costa Rica

Average pressure in January - Cartagena, Costa Rica
  • Average pressure in January: 1011.1mbar

The month with the highest atmospheric pressure is January (1011.1mbar).
The month with the lowest atmospheric pressure is October (1010.1mbar).

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Average wind speed in January
Cartagena, Costa Rica

Average wind speed in January - Cartagena, Costa Rica
  • Average wind speed in January: 21.6km/h

The windiest month (with the highest average wind speed) is February (21.9km/h).
The calmest month (with the lowest average wind speed) is September (7.9km/h).

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Average humidity in January
Cartagena, Costa Rica

Average humidity in January - Cartagena, Costa Rica
  • Average humidity in January: 71%

The month with the highest relative humidity is October (84%).
Months with the lowest relative humidity are March and April (65%).

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Average rainfall in January
Cartagena, Costa Rica

Average rainfall in January - Cartagena, Costa Rica
  • Average rainfall in January: 2mm

The wettest month (with the highest rainfall) is October (177mm).
The driest months (with the least rainfall) are February and March (1mm).

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Average rainfall days in January
Cartagena, Costa Rica

Average rainfall days in January - Cartagena, Costa Rica
  • Average rainfall days in January: 1.2 days

The month with the highest number of rainy days is October (22.5 days).
The month with the least rainy days is February (0.8 days).

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Average daylight in January /
Average sunshine in January
Cartagena, Costa Rica

Average daylight in January / Average sunshine in January - Cartagena, Costa Rica
  • Average daylight in January: 11.6h

Months with the longest days are June and July (Average daylight: 12.7h).
The month with the shortest days is December (Average daylight: 11.5h).

  • Average sunshine in January: 7.6h

The month with the most sunshine is July (Average sunshine: 10.7h).
The month with the least sunshine is January (Average sunshine: 7.6h).

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Average sunshine days in January
Cartagena, Costa Rica

Average sunshine days in January - Cartagena, Costa Rica
  • Average sunshine days in January: 29.8 days

The month with the most sunshine days is March (30.1 days).
The month with the least sunshine days is October (7 days).

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Average UV index in January
Cartagena, Costa Rica

Average UV index in January - Cartagena, Costa Rica
  • Average UV index in January: 7

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

Average cloud cover in January - Cartagena, Costa Rica
  • Average cloud cover in January: 10

The month with the most cloud cover is October (Cloud cover 43).
The month with the least cloud cover is February (Cloud cover 9).

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Average visibility in January
Cartagena, Costa Rica

Average visibility in January - Cartagena, Costa Rica
  • Average visibility in January: 10km

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

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