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 snowfall in December
- Average snowfall 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
In December, Rio de Onor experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 11°C (51.8°F) in November to a frosty 8.9°C (48°F). During December, Rio de Onor sees a mean low-temperature of 2°C (35.6°F).Humidity
The average relative humidity in December in Rio de Onor is 84%.Rainfall
In Rio de Onor, in December, during 12.7 rainfall days, 70mm (2.76") of precipitation is typically accumulated. In Rio de Onor, during the entire year, the rain falls for 141.7 days and collects up to 532mm (20.94") of precipitation.Snowfall
January through March, November and December are months with snowfall. In December, in Rio de Onor, it is snowing for 1 days. Throughout December, 13mm (0.51") of snow is accumulated. In Rio de Onor, Portugal, during the entire year, snow falls for 6.4 days and aggregates up to 51mm (2.01") of snow.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 07:35 and sunset at 16:56. On the last day of the month, sunrise is at 07:54 and sunset at 17:05 WET.
Sunshine
In December, the average sunshine in Rio de Onor is 5.1h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Around midday, solar radiation is most harmful; hence, exposure should be limited. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature in Rio de Onor?
What is the average humidity in December in Rio de Onor?
How much does it rain in Rio de Onor in December?
How many days does it snow in December in Rio de Onor?
What is the month with the shortest days in Rio de Onor?
What is the average length of the day in December in Rio de Onor?
What time are sunrise and sunset in December in Rio de Onor?
How long on average sun shines in December in Rio de Onor?
When is the lowest UV index in Rio de Onor?
What is the UV index intensity in December in Rio de Onor?
Average temperature in December
Rio de Onor, Portugal
- Average high temperature in December: 8.9°C
The warmest month (with the highest average high temperature) is August (28.3°C).
The month with the lowest average high temperature is January (8.3°C).
- Average low temperature in December: 2°C
The month with the highest average low temperature is July (13.8°C).
The coldest month (with the lowest average low temperature) is February (1.2°C).
Average pressure in December
Rio de Onor, Portugal
- Average pressure in December: 1022.9mbar
The month with the highest atmospheric pressure is December (1022.9mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).
Average wind speed in December
Rio de Onor, Portugal
- Average wind speed in December: 8.8km/h
The windiest month (with the highest average wind speed) is March (11.2km/h).
The calmest month (with the lowest average wind speed) is September (8.4km/h).
Average humidity in December
Rio de Onor, Portugal
- Average humidity in December: 84%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (52%).
Average rainfall in December
Rio de Onor, Portugal
- Average rainfall in December: 70mm
The wettest month (with the highest rainfall) is November (73mm).
The driest month (with the least rainfall) is August (11mm).
Average rainfall days in December
Rio de Onor, Portugal
- Average rainfall days in December: 12.7 days
The month with the highest number of rainy days is April (17.6 days).
The month with the least rainy days is August (4.2 days).
Average snowfall in December
Rio de Onor, Portugal
- Average snowfall in December: 13mm
The month with the highest snowfall is February (19mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Rio de Onor, Portugal
- Average snowfall days in December: 1 days
The month with the highest number of snowfall days is January (2.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Rio de Onor, Portugal
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in December
Rio de Onor, Portugal
- Average sunshine days in December: 16.3 days
The month with the most sunshine days is August (24.5 days).
The month with the least sunshine days is April (10.8 days).
Average UV index in December
Rio de Onor, Portugal
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Rio de Onor, Portugal
- Average cloud cover in December: 46
The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 13).
Average visibility in December
Rio de Onor, Portugal
- Average visibility in December: 8km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January, November and December (8km).
