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
The transition into December marks the average high-temperature at a still fresh 10.8°C (51.4°F), differing minimally from November's 12.6°C (54.7°F). In December, São Gião records an average nighttime temperature of 3.4°C (38.1°F).Humidity
In São Gião, the average relative humidity in December is 82%.Rainfall
December is the month with the most rainfall in São Gião. Rain falls for 10.5 days and accumulates 83mm (3.27") of precipitation.Snowfall
January through April, October through December are months with snowfall. In São Gião, during December, snow falls for 2.4 days and regularly aggregates up to 43mm (1.69") of snow. In São Gião, during the entire year, snow falls for 15.4 days and aggregates up to 244mm (9.61") of snow.Daylight
December has the shortest days of the year in São Gião, Portugal, with an average of 9h and 24min of daylight.On the first day of December in São Gião, sunrise is at 07:35 and sunset at 17:05. On the last day of the month, sunrise is at 07:53 and sunset at 17:14 WET.
Sunshine
In December, the average sunshine in São Gião is 5.3h.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 estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: The average daily UV index of 2 in December transforms into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Frequently asked questions
What is the temperature in December in São Gião?
What is the average humidity in December in São Gião?
What is the rainiest month in São Gião?
How much does it rain in São Gião in December?
How many days does it snow in December in São Gião?
What is the month with the shortest days in São Gião?
What is the average length of the day in December in São Gião?
When is the sunrise / sunset in December in São Gião?
How long on average sun shines in December in São Gião?
What are the months with the lowest UV index in São Gião?
How high is the UV index in December in São Gião?
Average temperature in December
São Gião, Portugal
- Average high temperature in December: 10.8°C
The warmest month (with the highest average high temperature) is August (29.8°C).
The month with the lowest average high temperature is January (9.8°C).
- Average low temperature in December: 3.4°C
The month with the highest average low temperature is August (14.2°C).
The coldest month (with the lowest average low temperature) is January (2.3°C).
Average pressure in December
São Gião, Portugal
- Average pressure in December: 1023mbar
The month with the highest atmospheric pressure is December (1023mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).
Average wind speed in December
São Gião, Portugal
- Average wind speed in December: 10.2km/h
The windiest month (with the highest average wind speed) is February (11.5km/h).
The calmest month (with the lowest average wind speed) is September (8.3km/h).
Average humidity in December
São Gião, Portugal
- Average humidity in December: 82%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (51%).
Average rainfall in December
São Gião, Portugal
- Average rainfall in December: 83mm
The wettest month (with the highest rainfall) is December (83mm).
The driest months (with the least rainfall) are July and August (7mm).
Average rainfall days in December
São Gião, Portugal
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is April (16.1 days).
The month with the least rainy days is August (2.5 days).
Average snowfall in December
São Gião, Portugal
- Average snowfall in December: 43mm
The month with the highest snowfall is January (62mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in December
São Gião, Portugal
- Average snowfall days in December: 2.4 days
The month with the highest number of snowfall days is January (4.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
São Gião, Portugal
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 2min
The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in December
São Gião, Portugal
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is August (27.5 days).
The month with the least sunshine days is April (12.7 days).
Average UV index in December
São Gião, Portugal
- Average UV index in December: 2
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
São Gião, Portugal
- Average cloud cover in December: 45
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility in December
São Gião, Portugal
- Average visibility in December: 8km
The months with the highest visibility are July and August (10km).
The month with the lowest visibility is January (7km).
São Gião, Portugal
Weather forecast for your location
2. Allow the app to use your location
