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
December
Weather in December
Temperature
December brings an average high-temperature of a moderate 15.8°C (60.4°F), nearly identical to the preceding month. São Marcos da Serra maintains a near steady average temperature of 10.9°C (51.6°F) during the nights of December, demonstrating little drop from daytime highs.Humidity
In São Marcos da Serra, the average relative humidity in December is 76%.Rainfall
In São Marcos da Serra, in December, during 7.8 rainfall days, 20mm (0.79") of precipitation is typically accumulated. In São Marcos da Serra, during the entire year, the rain falls for 85.4 days and collects up to 164mm (6.46") of precipitation.Daylight
With an average of 9h and 36min of daylight, December has the shortest days of the year in São Marcos da Serra, Portugal.On the first day of the month, sunrise is at 07:29 and sunset at 17:16. On the last day of December, in São Marcos da Serra, sunrise is at 07:47 and sunset at 17:25 WET.
Sunshine
In São Marcos da Serra, the average sunshine in December is 6.3h.UV index
The average daily maximum UV index in December in São Marcos da Serra is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A maximum daily UV index of 4 during December morphs into the following directions:
Undertake precautions - Obligation exists to protect against skin and eye damage. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in São Marcos da Serra?
What is the average humidity in December in São Marcos da Serra?
How much does it rain in São Marcos da Serra in December?
What is the month with the shortest days in São Marcos da Serra?
How many hours of daylight does São Marcos da Serra have in December?
When are sunrise and sunset in December in São Marcos da Serra?
How long on average sun shines in December in São Marcos da Serra?
What is the UV index intensity in December in São Marcos da Serra?
Average temperature in December
São Marcos da Serra, Portugal
- Average high temperature in December: 15.8°C
The warmest month (with the highest average high temperature) is August (27.8°C).
The month with the lowest average high temperature is January (14.5°C).
- Average low temperature in December: 10.9°C
The month with the highest average low temperature is August (18.4°C).
The coldest month (with the lowest average low temperature) is February (9.2°C).
Average pressure in December
São Marcos da Serra, Portugal
- Average pressure in December: 1022.6mbar
The month with the highest atmospheric pressure is December (1022.6mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).
Average wind speed in December
São Marcos da Serra, Portugal
- Average wind speed in December: 14.5km/h
The windiest month (with the highest average wind speed) is February (16.1km/h).
The calmest month (with the lowest average wind speed) is September (11.2km/h).
Average humidity in December
São Marcos da Serra, Portugal
- Average humidity in December: 76%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is August (65%).
Average rainfall in December
São Marcos da Serra, Portugal
- Average rainfall in December: 20mm
The wettest month (with the highest rainfall) is November (25mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in December
São Marcos da Serra, Portugal
- Average rainfall days in December: 7.8 days
The month with the highest number of rainy days is March (12.2 days).
The month with the least rainy days is August (1.5 days).
Average daylight in December /
Average sunshine in December
São Marcos da Serra, Portugal
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 6h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).
Average sunshine days in December
São Marcos da Serra, Portugal
- Average sunshine days in December: 20.7 days
The month with the most sunshine days is July (28.6 days).
The month with the least sunshine days is April (15.3 days).
Average UV index in December
São Marcos da Serra, Portugal
- Average UV index in December: 4
The months with the highest UV index are May, June, July, August and September (UV index 6).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in December
São Marcos da Serra, Portugal
- Average cloud cover in December: 30
The month with the most cloud cover is January (Cloud cover 35).
The month with the least cloud cover is August (Cloud cover 8).
Average visibility in December
São Marcos 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).
