December weather forecastSan Antonio, Uruguay

December

Weather in December

December, the first month of the summer in San Antonio, is a moderately hot month, with an average temperature varying between 25.6°C (78.1°F) and 17.8°C (64°F).

Temperature

December's onset witnesses a minor shift in the average high-temperature, moving from an agreeable 22.3°C (72.1°F) in November to a moderately hot 25.6°C (78.1°F). Throughout the month of December, San Antonio expects an average low of 17.8°C (64°F).

Humidity

In San Antonio, the average relative humidity in December is 67%.

Rainfall

In December, the rain falls for 11.4 days. Throughout December, 60mm (2.36") of precipitation is accumulated. Throughout the year, there are 131.6 rainfall days, and 707mm (27.83") of precipitation is accumulated.

Daylight

With an average of 14h and 24min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:24 and sunset at 19:42. On the last day of December, sunrise is at 05:35 and sunset at 20:00 -03.

Sunshine

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

UV index

January through March and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the maximum UV index of 6 suggests this advice:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.

Updated: Aug 24, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In San Antonio, 25.6°C (78.1°F) is the average high-temperature and 17.8°C (64°F) is the average low-temperature during December. In January, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 30°C (86°F).

The average relative humidity in December is 67%.

In San Antonio, during December, the rain falls for 11.4 days and regularly aggregates up to 60mm (2.36") of precipitation.

The month with the longest days is December, with an average of 14h and 24min of daylight.

In December, the average day length is 14h and 25min.

In December, on the first day of the month, sunrise is at 05:24 and sunset at 19:42. On the last day of the month, sunrise is at 05:35 and sunset at 20:00 -03.

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

In December, the average sunshine duration is 10.9h.

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

The average daily maximum UV index in December is 6. A UV Index of 6 to 7 symbolizes a high health threat from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

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

Nov

December

Jan

Average high temperature

22.3°C

25.6°C

27.8°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

18.7km/h

17.9km/h

18.4km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

16.3

19.3

Average UV index

Average cloud cover

Average visibility

Average temperature in December
San Antonio, Uruguay

Average high temperature in December: 25.6°C

The warmest month (with the highest average high temperature) is January (27.8°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 February (19.9°C).
The coldest month (with the lowest average low temperature) is July (8.7°C).

Average pressure in December
San Antonio, Uruguay

Average pressure in December: 1011.2mbar

The month with the highest atmospheric pressure is July (1018.9mbar).
The month with the lowest atmospheric pressure is December (1011.2mbar).

Average wind speed in December
San Antonio, Uruguay

Average wind speed in December: 16.8km/h

The windiest month (with the highest average wind speed) is September (19.2km/h).
The calmest month (with the lowest average wind speed) is May (16.7km/h).

Average humidity in December
San Antonio, Uruguay

Average humidity in December: 67%

The months with the highest relative humidity are July, August and September (79%).
The month with the lowest relative humidity is January (64%).

Average rainfall in December
San Antonio, Uruguay

Average rainfall in December: 60mm

The wettest months (with the highest rainfall) are July and November (68mm).
The driest month (with the least rainfall) is January (46mm).

Average rainfall days in December
San Antonio, Uruguay

Average rainfall days in December: 11.4 days

The month with the highest number of rainy days is March (12.2 days).
The month with the least rainy days is January (9.4 days).

Average daylight in December /
Average sunshine in December
San Antonio, 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 42min).

Average sunshine days in December
San Antonio, Uruguay

Average sunshine days in December: 18 days

The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is October (15.2 days).

Average UV index in December
San Antonio, Uruguay

Average UV index in December: 6

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

Average cloud cover in December
San Antonio, Uruguay

Average cloud cover in December: 21

The month with the most cloud cover is July (Cloud cover 40).
The month with the least cloud cover is January (Cloud cover 19).

Average visibility in December
San Antonio, 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).