January weather forecast
Montevideo, Uruguay

Beautiful lawns and palm trees in the independence square outside the Centrally placed Salvo Palace in Montevideo, Uruguay
Beautiful lawns and palm trees in the independence square outside the Centrally placed Salvo Palace in Montevideo, Uruguay

Weather in January

January, like December, in Montevideo, Uruguay, is a moderately hot summer month, with temperature in the range of an average low of 18°C (64.4°F) and an average high of 28.4°C (83.1°F).

Temperature

The warmest month is January, with an average high-temperature of 28.4°C (83.1°F) and an average low-temperature of 18°C (64.4°F).

Heat index

The average heat index is appraised at a hot 31.2°C (88.2°F). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'apparent temperature', or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like differences in body mass, height, and shape, metabolic differences, clothing, and activity influence one's weather impression. 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. 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.

Humidity

In Montevideo, Uruguay, the average relative humidity in January is 68%.

Rainfall

In Montevideo, during 6 rainfall days, 86.8mm (3.42") of precipitation is typically accumulated. Throughout the year, there are 77 rainfall days, and 1101.2mm (43.35") of precipitation is accumulated.

Sea temperature

The month with the warmest seawater in Montevideo is January, with an average sea temperature of 24.2°C (75.6°F).
Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 24.2°C (75.6°F) water may be enjoyable. (FYI: The official water temperature required for the Olympic swimming competition is 25°C (77°F) to 28°C (82.4°F).)

Daylight

In January, the average length of the day is 14.2h.

Sunshine

The month with the most sunshine is January, with an average of 9.5h of sunshine.

UV index

Months with the highest UV index are January and December, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an excessive health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In January, the average maximum UV index of 12 translate into the following recommendations:
Take all necessary precautions, as unprotected skin can burn in minutes. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the warmest month in Montevideo?

The warmest month in Montevideo, Uruguay, is January, with an average high-temperature of 28.4°C (83.1°F) and an average low-temperature of 18°C (64.4°F).

What is the temperature in January in Montevideo?

The average high-temperature, in January, is 28.4°C (83.1°F), while the average low-temperature is 18°C (64.4°F). In January, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is appraised at 31.2°C (88.2°F).

What is the average humidity in January in Montevideo?

In Montevideo, Uruguay, the average relative humidity in January is 68%.

How much does it rain in Montevideo in January?

In Montevideo, in January, during 6 rainfall days, 86.8mm (3.42") of precipitation is typically accumulated.

When is the sea warmest in Montevideo?

The month with the warmest seawater is January, with an average sea temperature of 24.2°C (75.6°F).

What is the sea temperature in January in Montevideo?

In Montevideo, in January, the average water temperature is 24.2°C (75.6°F). For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 24.2°C (75.6°F).

What is the average length of the day in January in Montevideo?

In Montevideo, Uruguay, the average length of the day in January is 14.2h.

What month has the most sunshine in Montevideo?

With an average of 9.5h of sunshine, January has the most sunshine of the year in Montevideo.

How many hours of sunshine does Montevideo have in January?

The average sunshine in January in Montevideo, Uruguay, is 9.5h.

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

January and December, with an average maximum UV index of 12, are months with the highest UV index.

How high is the UV index in January in Montevideo?

The average daily maximum UV index in January in Montevideo is 12. A UV Index value of 11, and more, symbolizes an extreme health threat from the exposure to the Sun's UV rays.

Average temperature in January
Montevideo, Uruguay

Average temperature in January - Montevideo, Uruguay
  • Average high temperature in January: 28.4°C

The warmest month (with the highest average high temperature) is January (28.4°C).
The month with the lowest average high temperature is July (15°C).

  • Average low temperature in January: 18°C

The month with the highest average low temperature is January (18°C).
The coldest month (with the lowest average low temperature) is July (7.2°C).

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Average humidity in January
Montevideo, Uruguay

Average humidity in January - Montevideo, Uruguay
  • Average humidity in January: 68%

The month with the highest relative humidity is June (82%).
The month with the lowest relative humidity is December (67%).

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Average rainfall in January
Montevideo, Uruguay

Average rainfall in January - Montevideo, Uruguay
  • Average rainfall in January: 86.8mm

The wettest month (with the highest rainfall) is October (108.5mm).
The driest month (with the least rainfall) is June (83.1mm).

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Average rainfall days in January
Montevideo, Uruguay

Average rainfall days in January - Montevideo, Uruguay
  • Average rainfall days in January: 6 days

Months with the highest number of rainy days are February, June, July, October and November (7 days).
Months with the least rainy days are January, March, April, May, August, September and December (6 days).

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Average sea temperature in January
Montevideo, Uruguay

Average sea temperature in January - Montevideo, Uruguay
  • Average sea temperature in January: 24.2°C

The best month for swimming (with the highest average sea temperature) is January (24.2°C).
The coldest month (with the lowest average sea temperature) is July (11.3°C).

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Average daylight in January /
Average sunshine in January
Montevideo, Uruguay

Average daylight in January / Average sunshine in January - Montevideo, Uruguay
  • Average daylight in January: 14.2h

The month with the longest days is December (Average daylight: 14.5h).
The month with the shortest days is June (Average daylight: 9.8h).

  • Average sunshine in January: 9.5h

The month with the most sunshine is January (Average sunshine: 9.5h).
The month with the least sunshine is June (Average sunshine: 4.3h).

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Average UV index in January
Montevideo, Uruguay

Average UV index in January - Montevideo, Uruguay
  • Average UV index in January: 12

Months with the highest UV index are January and December (UV index 12).
Months with the lowest UV index are June and July (UV index 2).

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