January weather forecast
Rosario, Uruguay

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Weather in January

January, the same as December, is another warm summer month in Rosario, Uruguay, with an average temperature varying between 27.2°C (81°F) and 21.3°C (70.3°F).

Temperature

Rosario experiences its highest temperatures in January, with an average peak of 27.2°C (81°F) and a low of 21.3°C (70.3°F).

Heat index

During January, the heat index is estimated at 29°C (84.2°F). Enduring exposure and continuous activity might cause a feeling of tiredness and induce heat cramps.
One should consider that heat index numbers are for shaded settings and light wind. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', gives a temperature feeling by integrating air temperature and humidity. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.

Humidity

With an average relative humidity of 66%, January is the least humid month.

Rainfall

In Rosario, Uruguay, in January, it is raining for 9.1 days, with typically 49mm (1.93") of accumulated precipitation. Throughout the year, there are 114.7 rainfall days, and 678mm (26.69") of precipitation is accumulated.

Daylight

In Rosario, the average length of the day in January is 14h and 8min.
On the first day of the month, sunrise is at 05:40 and sunset at 20:04. On the last day of January, in Rosario, Uruguay, sunrise is at 06:08 and sunset at 19:56 -03.

Sunshine

In January, the average sunshine in Rosario, Uruguay, is 10.7h.

UV index

The months with the highest UV index in Rosario are January through March, November and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index of 6 during January translates into the following directions:
Guard oneself from overexposure. Defence against sun injury is vital. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
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Frequently asked questions

What month is the hottest in Rosario?

January is the warmest month of the year in Rosario, registering average temperatures as high as 27.2°C (81°F) and as low as 21.3°C (70.3°F).

What are the temperatures in Rosario in January?

January temperatures vary between a high-temperature of 27.2°C (81°F) and a low-temperature of 21.3°C (70.3°F). In January, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 29°C (84.2°F).

What is the least humid month in Rosario?

With an average relative humidity of 66%, January is the least humid month in Rosario, Uruguay.

What is the average humidity in January in Rosario?

The average relative humidity in January in Rosario is 66%.

How much does it rain in Rosario in January?

In January, the rain falls for 9.1 days. Throughout January, 49mm (1.93") of precipitation is accumulated.

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

In Rosario, Uruguay, the average day length in January is 14h and 8min.

When is the sunrise / sunset in January in Rosario?

On the first day of January in Rosario, sunrise is at 05:40 and sunset at 20:04. On the last day of the month, sunrise is at 06:08 and sunset at 19:56 -03.

How long on average sun shines in January in Rosario?

In January, the average sunshine duration in Rosario is 10.7h.

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

January through March, November and December, with an average maximum UV index of 6, are months with the highest UV index in Rosario, Uruguay.

What is the UV index reading in January in Rosario?

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

Average temperature in January
Rosario, Uruguay

Average temperature in January - Rosario, Uruguay
  • Average high temperature in January: 27.2°C

The warmest month (with the highest average high temperature) is January (27.2°C).
The month with the lowest average high temperature is July (13.1°C).

  • Average low temperature in January: 21.3°C

The month with the highest average low temperature is January (21.3°C).
The coldest month (with the lowest average low temperature) is July (9.6°C).

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Average pressure in January
Rosario, Uruguay

Average pressure in January - Rosario, Uruguay
  • Average pressure in January: 1011.9mbar

The month with the highest atmospheric pressure is July (1019.1mbar).
The month with the lowest atmospheric pressure is December (1011.1mbar).

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Average wind speed in January
Rosario, Uruguay

Average wind speed in January - Rosario, Uruguay
  • Average wind speed in January: 19.1km/h

The windiest month (with the highest average wind speed) is September (21.1km/h).
The calmest month (with the lowest average wind speed) is December (18.1km/h).

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Average humidity in January
Rosario, Uruguay

Average humidity in January - Rosario, Uruguay
  • Average humidity in January: 66%

The month with the highest relative humidity is September (78%).
The month with the lowest relative humidity is January (66%).

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Average rainfall in January
Rosario, Uruguay

Average rainfall in January - Rosario, Uruguay
  • Average rainfall in January: 49mm

The wettest month (with the highest rainfall) is November (69mm).
The driest month (with the least rainfall) is May (43mm).

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Average rainfall days in January
Rosario, Uruguay

Average rainfall days in January - Rosario, Uruguay
  • Average rainfall days in January: 9.1 days

The month with the highest number of rainy days is March (11 days).
The month with the least rainy days is June (8.2 days).

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

Average daylight in January / Average sunshine in January - Rosario, Uruguay
  • Average daylight in January: 14h and 1min

The month with the longest days is December (Average daylight: 14h and 24min).
The month with the shortest days is June (Average daylight: 9h and 54min).

  • Average sunshine in January: 10h and 4min

The month with the most sunshine is December (Average sunshine: 11h and 6min).
The month with the least sunshine is June (Average sunshine: 6h and 0min).

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Average sunshine days in January
Rosario, Uruguay

Average sunshine days in January - Rosario, Uruguay
  • Average sunshine days in January: 20.3 days

The month with the most sunshine days is August (21.3 days).
The month with the least sunshine days is February (16.6 days).

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Average UV index in January
Rosario, Uruguay

Average UV index in January - Rosario, Uruguay
  • Average UV index in January: 6

The months with the highest UV index are January, February, March, November and December (UV index 6).
The month with the lowest UV index is July (UV index 3).

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Average cloud cover in January
Rosario, Uruguay

Average cloud cover in January - Rosario, Uruguay
  • Average cloud cover in January: 17

The month with the most cloud cover is July (Cloud cover 38).
The month with the least cloud cover is January (Cloud cover 17).

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Average visibility in January
Rosario, Uruguay

Average visibility in January - Rosario, Uruguay
  • Average visibility in January: 10km

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

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Rosario, Uruguay

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