Montevideo
Uruguay
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
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
January, like December, in Montevideo, Uruguay, is another warm summer month, with temperature in the range of an average high of 28.4°C (83.1°F) and an average low of 18°C (64.4°F).

Temperature

January is the warmest month, 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

In January, the average heat index is estimated at a tropical 31.2°C (88.2°F). Constant exposure and activity lead to possible fatigue. Prolonged exercise 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 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, pregnancy, metabolic differences), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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.

Humidity

The average relative humidity is 68%.

Rainfall

In January, in Montevideo, the rain falls for 6 days. Throughout January, 86.8mm (3.42") of precipitation is accumulated. In Montevideo, during the entire year, the rain falls for 77 days and collects up to 1101.2mm (43.35") of precipitation.

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: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 24.2°C (75.6°F) water. (FYI: The Olympic swimming competition requires a water temperature between 25°C (77°F) and 28°C (82.4°F).)

Daylight

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

Sunshine

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

UV index

January and December, with an average maximum UV index of 12, are months with the highest UV index in Montevideo. A UV Index estimate of 11, and higher, represents an excessive health risk from the exposure to the Sun's UV radiation for average individuals.
Note: In January, the average maximum UV index of 12 translate into the following recommendations:
Practice all essential precautions. Protection against sun damage is crucial. 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 strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the warmest month in Montevideo?

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

What is the temperature in January in Montevideo?

The average high-temperature, in January, in Montevideo, is 28.4°C (83.1°F), while the average low-temperature is 18°C (64.4°F). The average heat index (a.k.a. 'feels like', 'felt air temperature'), that factores the actual air temperature with the relative humidity, in January is calculated to 31.2°C (88.2°F).

What is the average humidity in January in Montevideo?

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

How many days does it rain in January in Montevideo?

In January, in Montevideo, the rain falls for 6 days. Throughout January, 86.8mm (3.42") of precipitation is accumulated.

What is the month with the warmest sea water 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 January, the average sea temperature is 24.2°C (75.6°F). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 24.2°C (75.6°F) water.

How many hours of daylight does Montevideo have in January?

The average length of the day in January in Montevideo is 14.2h.

What month has the most sunshine in Montevideo?

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

How long on average sun shines in January in Montevideo?

The average sunshine in January is 9.5h.

When is the highest UV index in Montevideo?

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

What is the UV index reading in January in Montevideo?

The average daily maximum UV index in January is 12. A UV Index reading of 11, and higher, represents an ultimate hazard to health from the exposure to the Sun's UV radiation.
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).

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%).

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 lowest rainfall) is June (83.1mm).

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 lowest number of rainy days are January, March, April, May, August, September and December (6 days).

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).

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 shortest days is June (Average daylight: 9.8h).

  • Average sunshine in January: 9.5h

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

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).