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
Weather in December
Temperature
Rio de Fornos marks the start of December with an average high-temperature of a chilly 8.9°C (48°F), hinting at a slight fluctuation from November's 11°C (51.8°F). Rio de Fornos's nights in December experience an average temperature drop to a cold 2°C (35.6°F).Humidity
The average relative humidity in December is 84%.Rainfall
In Rio de Fornos, in December, during 12.7 rainfall days, 70mm (2.76") of precipitation is typically accumulated. In Rio de Fornos, during the entire year, the rain falls for 141.4 days and collects up to 527mm (20.75") of precipitation.Snowfall
January through March, November and December are months with snowfall in Rio de Fornos, Portugal. In December, it is snowing for 1 days. Throughout December, 13mm (0.51") of snow is accumulated. In Rio de Fornos, during the entire year, snow falls for 6.4 days and aggregates up to 51mm (2.01") of snow.Daylight
The month with the shortest days in Rio de Fornos is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 07:36 and sunset at 16:58. On the last day of December, sunrise is at 07:55 and sunset at 17:07 WET.
Sunshine
In December, the average sunshine is 5.2h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Rio de Fornos. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 2 during December translates into the following guidance:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Frequently asked questions
What are the temperatures in Rio de Fornos in December?
What is the average humidity in December in Rio de Fornos?
How much does it rain in Rio de Fornos in December?
How many days does it snow in December in Rio de Fornos?
What is the month with the shortest days in Rio de Fornos?
What is the average length of the day in December in Rio de Fornos?
When is the sunrise / sunset in December in Rio de Fornos?
How long on average sun shines in December in Rio de Fornos?
What are the months with the lowest UV index in Rio de Fornos?
What is the UV index reading in December in Rio de Fornos?
Average temperature in December
Rio de Fornos, 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 Fornos, 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 Fornos, 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 (8.3km/h).
Average humidity in December
Rio de Fornos, 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 Fornos, 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 Fornos, 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 Fornos, 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 Fornos, 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 Fornos, 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 Fornos, 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 Fornos, 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 Fornos, 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 Fornos, 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).
Rio de Fornos, Portugal
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