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
December brings a slight increase in the average high-temperature, progressing from 24.7°C (76.5°F) in November to a still moderately hot 28.8°C (83.8°F). San Justo's temperature tends to fall to an average low of 18.5°C (65.3°F) during the nights of December.Heat index
The average heat index in December is calculated to be a tropical 31°C (87.8°F). If exposure and activity are sustained, they might cause a feeling of weariness, resulting in heat cramps.Heat index readings emphasize conditions of light breezes and shaded spots. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'felt air temperature' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
Humidity
The average relative humidity in December in San Justo, Argentina, is 59%.Rainfall
In San Justo, Argentina, in December, during 8.6 rainfall days, 62mm (2.44") of precipitation is typically accumulated. In San Justo, during the entire year, the rain falls for 100.3 days and collects up to 586mm (23.07") of precipitation.Daylight
December has the longest days of the year in San Justo, with an average of 14h and 24min of daylight.On the first day of December in San Justo, sunrise is at 05:34 and sunset at 19:52. On the last day of the month, sunrise is at 05:44 and sunset at 20:10 -03.
Sunshine
The month with the most sunshine is December, with an average of 11.2h of sunshine.UV index
The months with the highest UV index in San Justo are January through March, November and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 6 in December translates into this advice:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in San Justo in December?
What is the average humidity in December in San Justo?
How many days does it rain in December in San Justo?
When are the longest days in San Justo?
How many hours of daylight does San Justo have in December?
When are sunrise and sunset in December in San Justo?
What month has the most sunshine in San Justo?
How long on average sun shines in December in San Justo?
What are the months with the highest UV index in San Justo?
What is the UV index intensity in December in San Justo?
Average temperature in December
San Justo, Argentina
- Average high temperature in December: 28.8°C
The warmest month (with the highest average high temperature) is January (30.3°C).
The month with the lowest average high temperature is July (13.8°C).
- Average low temperature in December: 18.5°C
The month with the highest average low temperature is January (20.2°C).
The coldest month (with the lowest average low temperature) is July (8.1°C).
Average pressure in December
San Justo, 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
San Justo, Argentina
- Average wind speed in December: 14km/h
The windiest month (with the highest average wind speed) is September (16.4km/h).
The calmest month (with the lowest average wind speed) is March (13.8km/h).
Average humidity in December
San Justo, Argentina
- Average humidity in December: 59%
The month with the highest relative humidity is May (76%).
The month with the lowest relative humidity is January (57%).
Average rainfall in December
San Justo, Argentina
- Average rainfall in December: 62mm
The wettest month (with the highest rainfall) is November (70mm).
The driest month (with the least rainfall) is September (36mm).
Average rainfall days in December
San Justo, Argentina
- Average rainfall days in December: 8.6 days
The month with the highest number of rainy days is March (10.1 days).
The month with the least rainy days is August (5.8 days).
Average daylight in December /
Average sunshine in December
San Justo, 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 1min
The month with the most sunshine is December (Average sunshine: 11h and 12min).
The month with the least sunshine is June (Average sunshine: 5h and 54min).
Average sunshine days in December
San Justo, Argentina
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is August (24.1 days).
The month with the least sunshine days is February (18.3 days).
Average UV index in December
San Justo, Argentina
- Average UV index in December: 6
The months with the highest UV index are January, February, March, November and December (UV index 6).
The months with the lowest UV index are June and July (UV index 3).
Average cloud cover in December
San Justo, 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
San Justo, Argentina
- 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).
