Rosario
Argentina
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Rosario, Argentina

December, the first month of the summer, in Rosario, is a hot month, with average temperature varying between 31.7°C (89.1°F) and 17.5°C (63.5°F).

Temperature

In Rosario, the average high-temperature marginally rises, from a warm 28.5°C (83.3°F) in November, to a hot 31.7°C (89.1°F). In December, the average low-temperature is 17.5°C (63.5°F).

Heat index

In December, the average heat index is appraised at a tropical 34.8°C (94.6°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. With the 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 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional factors like activity, differences in body mass, height, and shape, metabolic differences, and pregnancy affect individual temperature impact. 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 especially crucial for babies and toddlers. 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

In Rosario, the average relative humidity in December is 54%.

Rainfall

December is the month with the most rainfall. Rain falls for 9.1 days and accumulates 72mm (2.83") of precipitation.

Daylight

With an average of 14.3h of daylight, December has the longest days of the year in Rosario.

Sunshine

With an average of 11.1h of sunshine, December has the most sunshine of the year.

UV index

In Rosario, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high threat to health from the exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 6 in December transform into the following instructions:
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. 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.

What is the temperature in December in Rosario?

The average high-temperature, in December, is 31.7°C (89.1°F), while the average low-temperature is 17.5°C (63.5°F). The average heat index (a.k.a. 'felt air temperature', 'feels like'), that combines relative humidity and air temperature, in December is evaluated at 34.8°C (94.6°F).

What is the average humidity in December in Rosario?

In Rosario, the average relative humidity in December is 54%.

How many days does it rain in December in Rosario?

In Rosario, in December, during 9.1 rainfall days, 72mm (2.83") of precipitation is typically accumulated.

What is the rainiest month in Rosario?

December is the month with the most rainfall. Rain falls for 9.1 days and accumulates 72mm (2.83") of precipitation.

When are the longest days in Rosario?

December has the longest days of the year in Rosario, with an average of 14.3h of daylight.

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

The average length of the day in December is 14.3h.

What month has the most sunshine in Rosario?

December has the most sunshine of the year, with an average of 11.1h of sunshine.

How many hours of sunshine does Rosario have in December?

The average sunshine in December in Rosario is 11.1h.

What is the UV index reading in December in Rosario?

In Rosario, Argentina, the average daily maximum UV index in December is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to the UV radiation.
Average temperature in December - Rosario, Argentina
  • Average high temperature in December: 31.7°C

The warmest month (with the highest average high temperature) is January (33.4°C).
The month with the lowest average high temperature is July (15.7°C).

  • Average low temperature in December: 17.5°C

The month with the highest average low temperature is January (18.8°C).
The coldest month (with the lowest average low temperature) is July (7.5°C).

Average humidity in December - Rosario, Argentina
  • Average humidity in December: 54%

The month with the highest relative humidity is May (75%).
The month with the lowest relative humidity is January (52%).

Average rainfall in December - Rosario, Argentina
  • Average rainfall in December: 72mm

The wettest month (with the highest rainfall) is December (72mm).
The driest month (with the lowest rainfall) is June (16mm).

Average rainfall days in December - Rosario, Argentina
  • Average rainfall days in December: 9.1 days

The month with the highest number of rainy days is October (10 days).
The month with the lowest number of rainy days is June (4.8 days).

Average daylight in December / Average sunshine in December - Rosario, Argentina
  • Average daylight in December: 14.3h

The month with the longest days is December (Average daylight: 14.3h).
The month with shortest days is June (Average daylight: 10h).

  • Average sunshine in December: 11.1h

The month with most sunshine is December (Average sunshine: 11.1h).
The month with least sunshine is May (Average sunshine: 7.4h).

Average UV index in December - Rosario, Argentina
  • Average UV index in December: 6

The month with the highest UV index is January (UV index 7).
Months with the lowest UV index are April, May, June, July, August and September (UV index 4).