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
December
Weather in December
Temperature
Altura, Portugal, registers an average high-temperature of a still comfortable 16.4°C (61.5°F) with the arrival of December, showing minor deviation from the preceding month. The nighttime temperature in Altura demonstrates a marginal decline, averaging at a fresh 11.7°C (53.1°F) during December.Humidity
In Altura, the average relative humidity in December is 73%.Rainfall
In Altura, in December, it is raining for 5.1 days, with typically 10mm (0.39") of accumulated precipitation. Throughout the year, in Altura, there are 51.4 rainfall days, and 90mm (3.54") of precipitation is accumulated.Sea temperature
In Altura, in December, the average water temperature is 17°C (62.6°F).Note: For most individuals, swimming in 17°C (62.6°F) is not a pleasurable activity. Breathing becomes progressively more difficult as water temperature declines below 21°C (69.8°F).
Daylight
The month with the shortest days is December, with an average of 9h and 42min of daylight.On the first day of December, sunrise is at 07:25 and sunset at 17:12. On the last day of the month, sunrise is at 07:43 and sunset at 17:22 WET.
Sunshine
In Altura, the average sunshine in December is 6.5h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: A typical high UV index of 4 in December suggests the following recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Altura?
What is the average humidity in December in Altura?
How much does it rain in Altura in December?
What is the sea water temperature in December in Altura?
What is the month with the shortest days in Altura?
How many hours of daylight does Altura have in December?
When are sunrise and sunset in December in Altura?
How many hours of sunshine does Altura have in December?
What is the month with the lowest UV index in Altura?
What is the UV index intensity in December in Altura?
Average temperature in December
Altura, Portugal
- Average high temperature in December: 16.4°C
The warmest month (with the highest average high temperature) is August (28.3°C).
The month with the lowest average high temperature is January (14.9°C).
- Average low temperature in December: 11.7°C
The month with the highest average low temperature is August (20.4°C).
The coldest month (with the lowest average low temperature) is February (10.3°C).
Average pressure in December
Altura, Portugal
- Average pressure in December: 1022.5mbar
The month with the highest atmospheric pressure is December (1022.5mbar).
The months with the lowest atmospheric pressure are April and August (1015.3mbar).
Average wind speed in December
Altura, Portugal
- Average wind speed in December: 16.9km/h
The windiest month (with the highest average wind speed) is February (18km/h).
The calmest month (with the lowest average wind speed) is September (12.2km/h).
Average humidity in December
Altura, Portugal
- Average humidity in December: 73%
The month with the highest relative humidity is January (74%).
The months with the lowest relative humidity are July and August (60%).
Average rainfall in December
Altura, Portugal
- Average rainfall in December: 10mm
The wettest months (with the highest rainfall) are April and November (15mm).
The driest months (with the least rainfall) are July and August (1mm).
Average rainfall days in December
Altura, Portugal
- Average rainfall days in December: 5.1 days
The month with the highest number of rainy days is April (8.4 days).
The month with the least rainy days is August (0.8 days).
Average sea temperature in December
Altura, Portugal
- Average sea temperature in December: 17°C
The best month for swimming (with the highest average sea temperature) is August (22°C).
The coldest months (with the lowest average sea temperature) are January, February and March (16°C).
Average daylight in December /
Average sunshine in December
Altura, 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 42min).
- Average sunshine in December: 6h and 3min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 12min).
Average sunshine days in December
Altura, Portugal
- Average sunshine days in December: 24.8 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is April (20 days).
Average UV index in December
Altura, 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 months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in December
Altura, Portugal
- Average cloud cover in December: 26
The months with the most cloud cover are January and April (Cloud cover 29).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in December
Altura, 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).
