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 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 advent of December presents an average high-temperature of a still mild 13.6°C (56.5°F), maintaining a close correlation with the preceding month. During December, São Tiago experiences a consistent low-temperature average of 7.9°C (46.2°F).Humidity
The average relative humidity in December in São Tiago is 80%.Rainfall
In December, the rain falls for 12.9 days. Throughout December, 116mm (4.57") of precipitation is accumulated. Throughout the year, there are 125.7 rainfall days, and 773mm (30.43") of precipitation is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December in São Tiago, sunrise is at 07:39 and sunset at 17:08. On the last day of the month, sunrise is at 07:58 and sunset at 17:17 WET.
Sunshine
The average sunshine in December in São Tiago is 5.5h.UV index
January through March, November and December, with an average maximum UV index of 3, are months with the lowest UV index in São Tiago. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 3 during December translates into these guidelines:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Frequently asked questions
What are the temperatures in São Tiago in December?
What is the average humidity in December in São Tiago?
How many days does it rain in December in São Tiago?
What is the month with the shortest days in São Tiago?
What is the average length of the day in December in São Tiago?
When are sunrise and sunset in December in São Tiago?
How long on average sun shines in December in São Tiago?
What are the months with the lowest UV index in São Tiago?
What is the UV index intensity in December in São Tiago?
Average temperature in December
São Tiago, Portugal
- Average high temperature in December: 13.6°C
The warmest month (with the highest average high temperature) is August (26.6°C).
The month with the lowest average high temperature is January (12.7°C).
- Average low temperature in December: 7.9°C
The months with the highest average low temperature are July and August (15.3°C).
The coldest months (with the lowest average low temperature) are January and February (6.8°C).
Average pressure in December
São Tiago, Portugal
- Average pressure in December: 1022.5mbar
The month with the highest atmospheric pressure is December (1022.5mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).
Average wind speed in December
São Tiago, Portugal
- Average wind speed in December: 9.7km/h
The windiest month (with the highest average wind speed) is February (10.3km/h).
The calmest month (with the lowest average wind speed) is September (7.8km/h).
Average humidity in December
São Tiago, Portugal
- Average humidity in December: 80%
The month with the highest relative humidity is January (82%).
The months with the lowest relative humidity are August and September (66%).
Average rainfall in December
São Tiago, Portugal
- Average rainfall in December: 116mm
The wettest month (with the highest rainfall) is November (124mm).
The driest month (with the least rainfall) is July (10mm).
Average rainfall days in December
São Tiago, Portugal
- Average rainfall days in December: 12.9 days
The month with the highest number of rainy days is November (15.6 days).
The month with the least rainy days is August (5 days).
Average daylight in December /
Average sunshine in December
São Tiago, 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 18min).
- Average sunshine in December: 5h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in December
São Tiago, Portugal
- Average sunshine days in December: 16.9 days
The month with the most sunshine days is August (24.2 days).
The month with the least sunshine days is November (12.5 days).
Average UV index in December
São Tiago, Portugal
- Average UV index in December: 3
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 3).
Average cloud cover in December
São Tiago, Portugal
- Average cloud cover in December: 42
The month with the most cloud cover is January (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in December
São Tiago, Portugal
- Average visibility in December: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is January (8km).
São Tiago, Portugal
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