Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
December
Weather in December
Temperature
Merlo's transition into December is noticed by a slight rise in the average high-temperature, advancing from a warm 25.3°C (77.5°F) in November to a still moderately hot 29.5°C (85.1°F). Merlo, after hot December days, encounters a marked drop to an average nighttime temperature of 17.5°C (63.5°F).Heat index
The heat index for December is estimated at a tropical 32°C (89.6°F). Persisting in activity during exposure could lead to weariness and subsequently to heat cramps.It is emphasized that the heat index's values are meant for shaded zones with mild winds. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
Humidity
In Merlo, Argentina, the average relative humidity in December is 58%.Rainfall
In Merlo, during December, the rain falls for 6.1 days and regularly aggregates up to 18mm (0.71") of precipitation. Throughout the year, there are 69.2 rainfall days, and 143mm (5.63") of precipitation is accumulated.Daylight
December has the longest days of the year, with an average of 14h and 24min of daylight.On the first day of December, sunrise is at 05:34 and sunset at 19:53. On the last day of the month, sunrise is at 05:45 and sunset at 20:11 -03.
Sunshine
December has the most sunshine of the year in Merlo, with an average of 11.3h of sunshine.UV index
The average daily maximum UV index in December is 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.Note: In December, a regular UV index of 6 translates into these guidelines:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Merlo in December?
What is the average humidity in December in Merlo?
How many days does it rain in December in Merlo?
When are the longest days in Merlo?
How many hours of daylight does Merlo have in December?
When is the sunrise / sunset in December in Merlo?
What month has the most sunshine in Merlo?
How long on average sun shines in December in Merlo?
How high is the UV index in December in Merlo?
Average temperature in December
Merlo, Argentina
- Average high temperature in December: 29.5°C
The warmest month (with the highest average high temperature) is January (31.3°C).
The month with the lowest average high temperature is July (13.9°C).
- Average low temperature in December: 17.5°C
The month with the highest average low temperature is January (19.4°C).
The coldest month (with the lowest average low temperature) is July (7.4°C).
Average pressure in December
Merlo, Argentina
- Average pressure in December: 1011mbar
The month with the highest atmospheric pressure is July (1019.1mbar).
The month with the lowest atmospheric pressure is December (1011mbar).
Average wind speed in December
Merlo, Argentina
- Average wind speed in December: 13.1km/h
The windiest month (with the highest average wind speed) is September (15.4km/h).
The calmest month (with the lowest average wind speed) is March (12.7km/h).
Average humidity in December
Merlo, Argentina
- Average humidity in December: 58%
The months with the highest relative humidity are May and July (76%).
The month with the lowest relative humidity is January (55%).
Average rainfall in December
Merlo, Argentina
- Average rainfall in December: 18mm
The wettest month (with the highest rainfall) is October (22mm).
The driest month (with the least rainfall) is September (5mm).
Average rainfall days in December
Merlo, Argentina
- Average rainfall days in December: 6.1 days
The months with the highest number of rainy days are April and October (6.8 days).
The month with the least rainy days is August (4.1 days).
Average daylight in December /
Average sunshine in December
Merlo, Argentina
- Average daylight in December: 14h and 2min
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: 11h and 2min
The month with the most sunshine is December (Average sunshine: 11h and 18min).
The month with the least sunshine is June (Average sunshine: 5h and 54min).
Average sunshine days in December
Merlo, Argentina
- Average sunshine days in December: 22.3 days
The month with the most sunshine days is August (25.1 days).
The month with the least sunshine days is February (20.6 days).
Average UV index in December
Merlo, Argentina
- Average UV index in December: 6
The month with the highest UV index is January (UV index 7).
The months with the lowest UV index are June and July (UV index 3).
Average cloud cover in December
Merlo, Argentina
- Average cloud cover in December: 18
The month with the most cloud cover is July (Cloud cover 36).
The month with the least cloud cover is January (Cloud cover 16).
Average visibility in December
Merlo, Argentina
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (10km).
The month with the lowest visibility is July (9km).
