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 transition from November to December sees average high-temperatures adjusting to a mild 15.8°C (60.4°F), from a not significantly different 17.6°C (63.7°F). Nights in Santa Clara-a-Velha, Portugal, during December maintain a steady temperature, averaging at a cool 10.9°C (51.6°F).Humidity
In Santa Clara-a-Velha, Portugal, the average relative humidity in December is 76%.Rainfall
In Santa Clara-a-Velha, in December, it is raining for 7.8 days, with typically 20mm (0.79") of accumulated precipitation. In Santa Clara-a-Velha, during the entire year, the rain falls for 85.4 days and collects up to 164mm (6.46") of precipitation.Daylight
The month with the shortest days in Santa Clara-a-Velha is December, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 07:30 and sunset at 17:16. On the last day of December, in Santa Clara-a-Velha, sunrise is at 07:48 and sunset at 17:25 WET.
Sunshine
In Santa Clara-a-Velha, Portugal, the average sunshine in December is 6.3h.UV index
The average daily maximum UV index in December in Santa Clara-a-Velha is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: In December, the maximum UV index of 4 transforms into these recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Frequently asked questions
What is the usual temperature for Santa Clara-a-Velha in December?
What is the average humidity in December in Santa Clara-a-Velha?
How many days does it rain in December in Santa Clara-a-Velha?
What is the month with the shortest days in Santa Clara-a-Velha?
How many hours of daylight does Santa Clara-a-Velha have in December?
When are sunrise and sunset in December in Santa Clara-a-Velha?
How long on average sun shines in December in Santa Clara-a-Velha?
What is the UV index reading in December in Santa Clara-a-Velha?
Average temperature in December
Santa Clara-a-Velha, 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
Santa Clara-a-Velha, 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
Santa Clara-a-Velha, 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
Santa Clara-a-Velha, 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
Santa Clara-a-Velha, 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
Santa Clara-a-Velha, 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
Santa Clara-a-Velha, 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
Santa Clara-a-Velha, 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
Santa Clara-a-Velha, 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
Santa Clara-a-Velha, 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
Santa Clara-a-Velha, 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).
Santa Clara-a-Velha, Portugal
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