December weather forecastSan Jacinto, Uruguay

December

Weather in December

December, the first month of the summer in San Jacinto, is a warm month, with an average temperature ranging between max 25.2°C (77.4°F) and min 17.8°C (64°F).

Temperature

The shift into December is marked by a modest rise in the average high-temperature, moving from November's pleasant 22°C (71.6°F) to a moderately hot 25.2°C (77.4°F). December's nights observe an average temperature of 17.8°C (64°F).

Humidity

In San Jacinto, the average relative humidity in December is 68%.

Rainfall

In San Jacinto, in December, during 9.9 rainfall days, 62mm (2.44") of precipitation is typically accumulated. In San Jacinto, during the entire year, the rain falls for 122.1 days and collects up to 681mm (26.81") of precipitation.

Daylight

With an average of 14h and 24min of daylight, December has the longest days of the year.
On the first day of December, sunrise is at 05:23 and sunset at 19:41. On the last day of the month, sunrise is at 05:34 and sunset at 19:59 -03.

Sunshine

The months with the most sunshine are January and December, with an average of 10.9h of sunshine.

UV index

The months with the highest UV index are January through March and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 6 translates into the following recommendations:
Inhibit overexposure. Warding off sun damage is of utmost importance. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.

Updated: Jun 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In December, in San Jacinto, the average high-temperature is 25.2°C (77.4°F), and the average low-temperature is 17.8°C (64°F). In January, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is appraised at 29°C (84.2°F).

In December, the average relative humidity is 68%.

In San Jacinto, in December, during 9.9 rainfall days, 62mm (2.44") of precipitation is typically accumulated.

With an average of 14h and 24min of daylight, December has the longest days of the year.

In San Jacinto, the average day length in December is 14h and 26min.

In December, on the first day of the month, sunrise is at 05:23 and sunset at 19:41. On the last day of the month, sunrise is at 05:34 and sunset at 19:59 -03.

The months with the most sunshine are January and December, with an average of 10.9h of sunshine.

In San Jacinto, the average sunshine duration in December is 10.9h.

The months with the highest UV index are January through March and December, with an average maximum UV index of 6.

In December, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

22°C

25.2°C

27.2°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

19.4km/h

18.6km/h

19km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

18.2

19.5

21.4

Average UV index

Average cloud cover

Average visibility

Average temperature in December
San Jacinto, Uruguay

Average high temperature in December: 25.2°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 (13.3°C).

Average low temperature in December: 17.8°C

The month with the highest average low temperature is January (20°C).
The coldest month (with the lowest average low temperature) is July (8.8°C).

Average pressure in December
San Jacinto, Uruguay

Average pressure in December: 1011.2mbar

The month with the highest atmospheric pressure is July (1018.8mbar).
The month with the lowest atmospheric pressure is December (1011.2mbar).

Average wind speed in December
San Jacinto, Uruguay

Average wind speed in December: 17.4km/h

The windiest month (with the highest average wind speed) is September (19.6km/h).
The calmest month (with the lowest average wind speed) is May (17.2km/h).

Average humidity in December
San Jacinto, Uruguay

Average humidity in December: 68%

The months with the highest relative humidity are July and September (79%).
The month with the lowest relative humidity is January (65%).

Average rainfall in December
San Jacinto, Uruguay

Average rainfall in December: 62mm

The wettest month (with the highest rainfall) is July (71mm).
The driest month (with the least rainfall) is January (42mm).

Average rainfall days in December
San Jacinto, Uruguay

Average rainfall days in December: 9.9 days

The month with the highest number of rainy days is July (11.7 days).
The month with the least rainy days is January (8.4 days).

Average daylight in December /
Average sunshine in December
San Jacinto, Uruguay

Average daylight in December: 14h and 24min

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 December: 10h and 54min

The months with the most sunshine are January and December (Average sunshine: 10h and 54min).
The month with the least sunshine is July (Average sunshine: 5h and 30min).

Average sunshine days in December
San Jacinto, Uruguay

Average sunshine days in December: 19.5 days

The month with the most sunshine days is January (21.4 days).
The month with the least sunshine days is September (16.5 days).

Average UV index in December
San Jacinto, Uruguay

Average UV index in December: 6

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

Average cloud cover in December
San Jacinto, Uruguay

Average cloud cover in December: 22

The month with the most cloud cover is July (Cloud cover 41).
The month with the least cloud cover is January (Cloud cover 20).

Average visibility in December
San Jacinto, Uruguay

Average visibility in December: 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).