December weather forecastCaieiras, Brazil
December
Weather in December
December, the first month of the summer in Caieiras, is also a moderately hot month, with an average temperature varying between 26.4°C (79.5°F) and 18°C (64.4°F).Temperature
December is Caieiras's warmest month, registering average high temperatures of 26.4°C (79.5°F) and lows of 18°C (64.4°F).Humidity
In December, the average relative humidity in Caieiras, Brazil, is 84%.Rainfall
In Caieiras, during December, the rain falls for 25.6 days and regularly aggregates up to 167mm (6.57") of precipitation. In Caieiras, during the entire year, the rain falls for 220.1 days and collects up to 1232mm (48.5") of precipitation.Daylight
December has the longest days of the year, with an average of 13h and 30min of daylight.On the first day of December, sunrise is at 05:12 and sunset at 18:40. On the last day of the month, sunrise is at 05:23 and sunset at 18:56 -03.
Sunshine
In Caieiras, Brazil, the average sunshine in December is 7.3h.UV index
The months with the lowest UV index are February through September, November and December, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The daily maximum UV index of 5 in December interprets into the following advice:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Caieiras, Brazil
- Average high temperature in December: 26.4°C
The warmest month (with the highest average high temperature) is December (26.4°C).
The month with the lowest average high temperature is June (20.8°C).
- Average low temperature in December: 18°C
The month with the highest average low temperature is January (18.3°C).
The coldest month (with the lowest average low temperature) is July (12.4°C).
Average pressure in December
Caieiras, Brazil
- Average pressure in December: 1011.9mbar
The month with the highest atmospheric pressure is July (1020.3mbar).
The month with the lowest atmospheric pressure is December (1011.9mbar).
Average wind speed in December
Caieiras, Brazil
- Average wind speed in December: 9.1km/h
The windiest month (with the highest average wind speed) is October (10.3km/h).
The calmest month (with the lowest average wind speed) is February (7.9km/h).
Average humidity in December
Caieiras, Brazil
- Average humidity in December: 84%
The month with the highest relative humidity is March (87%).
The months with the lowest relative humidity are August and September (73%).
Average rainfall in December
Caieiras, Brazil
- Average rainfall in December: 167mm
The wettest month (with the highest rainfall) is January (234mm).
The driest month (with the least rainfall) is August (33mm).
Average rainfall days in December
Caieiras, Brazil
- Average rainfall days in December: 25.6 days
The month with the highest number of rainy days is January (27.6 days).
The month with the least rainy days is August (8.1 days).
Average daylight in December /
Average sunshine in December
Caieiras, Brazil
- Average daylight in December: 13h and 30min
The month with the longest days is December (Average daylight: 13h and 30min).
The month with the shortest days is June (Average daylight: 10h and 42min).
- Average sunshine in December: 7h and 18min
The month with the most sunshine is September (Average sunshine: 8h and 42min).
The month with the least sunshine is January (Average sunshine: 7h and 12min).
Average sunshine days in December
Caieiras, Brazil
- Average sunshine days in December: 3.8 days
The month with the most sunshine days is August (19.9 days).
The month with the least sunshine days is January (2.3 days).
Average UV index in December
Caieiras, Brazil
- Average UV index in December: 5
The months with the highest UV index are January and October (UV index 6).
The months with the lowest UV index are February, March, April, May, June, July, August, September, November and December (UV index 5).
Average cloud cover in December
Caieiras, Brazil
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Caieiras, Brazil
- Average visibility in December: 8km
The months with the highest visibility are August and September (9km).
The months with the lowest visibility are January, February, March, April and May (7km).
