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
The arrival of December in Olhão records an average high-temperature of a still refreshing 16.5°C (61.7°F), closely related to the 18.5°C (65.3°F) observed in November. Olhão notes a consistent average low-temperature of 12.7°C (54.9°F) during December nights.Humidity
In Olhão, the average relative humidity in December is 73%.Rainfall
In December, in Olhão, the rain falls for 5.1 days. Throughout December, 14mm (0.55") of precipitation is accumulated. Throughout the year, in Olhão, there are 54.1 rainfall days, and 109mm (4.29") of precipitation is accumulated.Sea temperature
In Olhão, the average seawater temperature in December is 17.4°C (63.3°F).Note: Most people find swimming in 17.4°C (63.3°F) unenjoyable. As the water temperature falls from 21°C (69.8°F) to 15°C (59°F), controlling one's breathing becomes harder.
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 07:26 and sunset at 17:14. On the last day of the month, sunrise is at 07:44 and sunset at 17:24 WET.
Sunshine
In December, the average sunshine is 6.4h.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 reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In December, a daily maximum UV index of 4 leads to the following instructions:
Put precautions into practice - Guidance to elude sunburn is provided. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Frequently asked questions
What are the temperatures in Olhão in December?
What is the average humidity in December in Olhão?
How much does it rain in Olhão in December?
How cold is the water in December in Olhão?
What is the month with the shortest days in Olhão?
What is the average length of the day in December in Olhão?
When is the sunrise / sunset in December in Olhão?
How many hours of sunshine does Olhão have in December?
What are the months with the lowest UV index in Olhão?
How high is the UV index in December in Olhão?
Average temperature in December
Olhão, Portugal
- Average high temperature in December: 16.5°C
The warmest month (with the highest average high temperature) is August (27.1°C).
The month with the lowest average high temperature is January (15.1°C).
- Average low temperature in December: 12.7°C
The month with the highest average low temperature is August (20.8°C).
The coldest month (with the lowest average low temperature) is February (11.2°C).
Average pressure in December
Olhão, 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 (1015.4mbar).
Average wind speed in December
Olhão, Portugal
- Average wind speed in December: 17.9km/h
The windiest months (with the highest average wind speed) are February and March (19km/h).
The calmest month (with the lowest average wind speed) is September (12.7km/h).
Average humidity in December
Olhão, Portugal
- Average humidity in December: 73%
The month with the highest relative humidity is April (74%).
The month with the lowest relative humidity is August (62%).
Average rainfall in December
Olhão, Portugal
- Average rainfall in December: 14mm
The wettest month (with the highest rainfall) is November (19mm).
The driest months (with the least rainfall) are June, July and August (1mm).
Average rainfall days in December
Olhão, Portugal
- Average rainfall days in December: 5.1 days
The month with the highest number of rainy days is April (8.2 days).
The month with the least rainy days is August (0.8 days).
Average sea temperature in December
Olhão, Portugal
- Average sea temperature in December: 17.4°C
The best month for swimming (with the highest average sea temperature) is August (22.1°C).
The coldest month (with the lowest average sea temperature) is March (15.9°C).
Average daylight in December /
Average sunshine in December
Olhão, 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 2min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 6min).
Average sunshine days in December
Olhão, Portugal
- Average sunshine days in December: 25.3 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is April (20.3 days).
Average UV index in December
Olhão, 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
Olhão, Portugal
- Average cloud cover in December: 27
The month with the most cloud cover is January (Cloud cover 30).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in December
Olhão, 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).
Olhão, Portugal
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