December weather forecastSão Jerônimo, Brazil
December
Weather in December
The first month of the summer, December, is also a moderately hot month in São Jerônimo, Brazil, with temperature in the range of an average low of 17.7°C (63.9°F) and an average high of 28.8°C (83.8°F).Temperature
São Jerônimo's weather, upon December's arrival, documents an average high-temperature of a still moderately hot 28.8°C (83.8°F), nearly identical to the prior month. During the nights in December, an average low-temperature of 17.7°C (63.9°F) is observed in São Jerônimo.Heat index
In December, the heat index is estimated at a tropical 33°C (91.4°F). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.Bear in mind that the heat index values are determined for shaded areas and light breezes. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
Humidity
The least humid month is December, with an average relative humidity of 76%.Rainfall
In São Jerônimo, during December, the rain falls for 14.7 days and regularly aggregates up to 38mm (1.5") of precipitation. Throughout the year, in São Jerônimo, there are 144.7 rainfall days, and 380mm (14.96") of precipitation is accumulated.Daylight
The month with the longest days is December, with an average of 14h and 0min of daylight.On the first day of December, sunrise is at 05:18 and sunset at 19:14. On the last day of the month, sunrise is at 05:29 and sunset at 19:31 -03.
Sunshine
The month with the most sunshine is December, with an average of 8.5h of sunshine.UV index
January through March, November and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 6 in December interprets into the following recommendations:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. 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. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
São Jerônimo, Brazil
- Average high temperature in December: 28.8°C
The warmest month (with the highest average high temperature) is February (29.7°C).
The month with the lowest average high temperature is July (18.3°C).
- Average low temperature in December: 17.7°C
The months with the highest average low temperature are January and February (18.8°C).
The coldest month (with the lowest average low temperature) is July (9.7°C).
Average pressure in December
São Jerônimo, Brazil
- Average pressure in December: 1011.4mbar
The month with the highest atmospheric pressure is July (1020mbar).
The month with the lowest atmospheric pressure is December (1011.4mbar).
Average wind speed in December
São Jerônimo, Brazil
- Average wind speed in December: 9.5km/h
The windiest month (with the highest average wind speed) is August (10.3km/h).
The calmest month (with the lowest average wind speed) is May (8.9km/h).
Average humidity in December
São Jerônimo, Brazil
- Average humidity in December: 76%
The months with the highest relative humidity are May, June and July (84%).
The month with the lowest relative humidity is December (76%).
Average rainfall in December
São Jerônimo, Brazil
- Average rainfall in December: 38mm
The wettest month (with the highest rainfall) is January (46mm).
The driest month (with the least rainfall) is September (18mm).
Average rainfall days in December
São Jerônimo, Brazil
- Average rainfall days in December: 14.7 days
The month with the highest number of rainy days is January (16.9 days).
The month with the least rainy days is June (9.4 days).
Average daylight in December /
Average sunshine in December
São Jerônimo, Brazil
- Average daylight in December: 14h and 0min
The month with the longest days is December (Average daylight: 14h and 0min).
The month with the shortest days is June (Average daylight: 10h and 12min).
- Average sunshine in December: 8h and 30min
The month with the most sunshine is December (Average sunshine: 8h and 30min).
The month with the least sunshine is September (Average sunshine: 7h and 12min).
Average sunshine days in December
São Jerônimo, Brazil
- Average sunshine days in December: 14.1 days
The month with the most sunshine days is July (18.9 days).
The month with the least sunshine days is January (11.6 days).
Average UV index in December
São Jerônimo, Brazil
- 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 May, June and July (UV index 4).
Average cloud cover in December
São Jerônimo, Brazil
- Average cloud cover in December: 33
The month with the most cloud cover is September (Cloud cover 40).
The month with the least cloud cover is November (Cloud cover 31).
Average visibility in December
São Jerônimo, Brazil
- Average visibility in December: 9km
The months with the highest visibility are February, April, June, July, August, November and December (9km).
The months with the lowest visibility are January, March, May, September and October (8km).
