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 sea temperature 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
Santo da Serra registers an average high-temperature of a comfortable 19.2°C (66.6°F) with the arrival of December, showing minor deviation from the preceding month. Nights in December cool down, indicating a minor disparity from daytime highs with an average low-temperature of 18.2°C (64.8°F).Humidity
In Santo da Serra, the average relative humidity in December is 74%.Rainfall
In Santo da Serra, Portugal, in December, it is raining for 12.3 days, with typically 24mm (0.94") of accumulated precipitation. In Santo da Serra, during the entire year, the rain falls for 105.6 days and collects up to 190mm (7.48") of precipitation.Sea temperature
In December, the average sea temperature in Santo da Serra is 19°C (66.2°F).Note: The majority of people find swimming in 19°C (66.2°F) unenjoyable. As the water temperature decreases from 21°C (69.8°F) to 15°C (59°F), breathing becomes more challenging to control.
Daylight
December has the shortest days of the year, with an average of 10h and 0min of daylight.On the first day of December, sunrise is at 07:51 and sunset at 18:01. On the last day of the month, sunrise is at 08:09 and sunset at 18:11 WET.
Sunshine
The average sunshine in December in Santo da Serra, Portugal, is 7.7h.UV index
January through May, November and December, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: A daily maximum UV index of 5 in December translates into the following instructions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Frequently asked questions
What is the temperature in December in Santo da Serra?
What is the average humidity in December in Santo da Serra?
How many days does it rain in December in Santo da Serra?
What is the sea water temperature in December in Santo da Serra?
What is the month with the shortest days in Santo da Serra?
What is the average length of the day in December in Santo da Serra?
When is the sunrise / sunset in December in Santo da Serra?
How long on average sun shines in December in Santo da Serra?
What is the month with the lowest UV index in Santo da Serra?
What is the UV index reading in December in Santo da Serra?
Average temperature in December
Santo da Serra, Portugal
- Average high temperature in December: 19.2°C
The warmest months (with the highest average high temperature) are August and September (22.8°C).
The months with the lowest average high temperature are February and March (17.3°C).
- Average low temperature in December: 18.2°C
The month with the highest average low temperature is September (22.1°C).
The coldest month (with the lowest average low temperature) is March (15.9°C).
Average pressure in December
Santo da Serra, Portugal
- Average pressure in December: 1022.4mbar
The month with the highest atmospheric pressure is January (1024.1mbar).
The month with the lowest atmospheric pressure is October (1017mbar).
Average wind speed in December
Santo da Serra, Portugal
- Average wind speed in December: 23km/h
The windiest months (with the highest average wind speed) are February and March (23.8km/h).
The calmest month (with the lowest average wind speed) is September (18.5km/h).
Average humidity in December
Santo da Serra, Portugal
- Average humidity in December: 74%
The month with the highest relative humidity is August (81%).
The months with the lowest relative humidity are January, February and November (73%).
Average rainfall in December
Santo da Serra, Portugal
- Average rainfall in December: 24mm
The wettest month (with the highest rainfall) is October (34mm).
The driest months (with the least rainfall) are July and August (3mm).
Average rainfall days in December
Santo da Serra, Portugal
- Average rainfall days in December: 12.3 days
The month with the highest number of rainy days is November (14.2 days).
The month with the least rainy days is August (4.3 days).
Average sea temperature in December
Santo da Serra, Portugal
- Average sea temperature in December: 19°C
The best months for swimming (with the highest average sea temperature) are August and September (23°C).
The coldest months (with the lowest average sea temperature) are January, February, March and April (18°C).
Average daylight in December /
Average sunshine in December
Santo da Serra, Portugal
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 7h and 4min
The month with the most sunshine is June (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 7h and 36min).
Average sunshine days in December
Santo da Serra, Portugal
- Average sunshine days in December: 13.1 days
The month with the most sunshine days is August (20.6 days).
The month with the least sunshine days is November (10.1 days).
Average UV index in December
Santo da Serra, Portugal
- Average UV index in December: 5
The months with the highest UV index are June, July, August, September and October (UV index 6).
The months with the lowest UV index are January, February, March, April, May, November and December (UV index 5).
Average cloud cover in December
Santo da Serra, Portugal
- Average cloud cover in December: 39
The months with the most cloud cover are January and November (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in December
Santo da Serra, Portugal
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Santo da Serra, Portugal
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