December weather forecastCastelar, Argentina
December
Weather in December
December, the first month of the summer in Castelar, is still a warm month, with an average temperature ranging between max 29.5°C (85.1°F) and min 17.5°C (63.5°F).Temperature
December's arrival sees a mild rise in the average high-temperature, transitioning from November's 25.3°C (77.5°F) to a still moderately hot 29.5°C (85.1°F). Despite a stark disparity with daily highs, Castelar records an average nighttime temperature of 17.5°C (63.5°F) in December.Heat index
December's heat index is calculated to be a tropical 32°C (89.6°F). Unrelenting activity during exposure could cause fatigue and potentially lead to heat cramps.Heat index details are generally centered around shaded locations and a mild breeze. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is achieved by amalgamating air temperature with the relative humidity readings. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. 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. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Humidity
In December, the average relative humidity is 58%.Rainfall
In Castelar, 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
The month with the longest days in Castelar is December, 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 05:44 and sunset at 20:10 -03.
Sunshine
December has the most sunshine of the year, with an average of 11.3h of sunshine.UV index
In Castelar, the average daily maximum UV index in December is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 6 during December translates into the following recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Castelar, 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
Castelar, 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
Castelar, 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
Castelar, 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
Castelar, 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
Castelar, 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
Castelar, Argentina
- 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: 11h and 18min
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
Castelar, 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
Castelar, 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
Castelar, 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
Castelar, 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).
