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 commencement of December brings an average high-temperature of a still refreshing 16.5°C (61.7°F), marking an inconsequential divergence from November. Nights in December showcase an average temperature of 12.5°C (54.5°F), slightly cooler than the daytime.Humidity
In Portimão, the average relative humidity in December is 74%.Rainfall
In Portimão, during December, the rain falls for 7.6 days and regularly aggregates up to 16mm (0.63") of precipitation. In Portimão, during the entire year, the rain falls for 73.8 days and collects up to 116mm (4.57") of precipitation.Sea temperature
In Portimão, in December, the average water temperature is 17.4°C (63.3°F).Note: Swimming in water that is 17.4°C (63.3°F) is not enjoyable for most. Breathing becomes more challenging to manage as the water temperature dips from 21°C (69.8°F) to 15°C (59°F).
Daylight
The month with the shortest days in Portimão is December, with an average of 9h and 42min of daylight.On the first day of December, sunrise is at 07:29 and sunset at 17:17. On the last day of the month, sunrise is at 07:47 and sunset at 17:27 WET.
Sunshine
In December, the average sunshine is 6.3h.UV index
January through March, November and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 4 during December translates into the following directions:
Guard yourself - Precautionary measures against sun damage are advocated. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Frequently asked questions
What is the average December temperature in Portimão?
What is the average humidity in December in Portimão?
How much does it rain in Portimão in December?
What is the sea water temperature in December in Portimão?
What is the month with the shortest days in Portimão?
How many hours of daylight does Portimão have in December?
What time are sunrise and sunset in December in Portimão?
How many hours of sunshine does Portimão have in December?
What is the month with the lowest UV index in Portimão?
What is the UV index reading in December in Portimão?
Average temperature in December
Portimão, Portugal
- Average high temperature in December: 16.5°C
The warmest month (with the highest average high temperature) is August (26.4°C).
The month with the lowest average high temperature is January (15.2°C).
- Average low temperature in December: 12.5°C
The month with the highest average low temperature is August (19.4°C).
The coldest month (with the lowest average low temperature) is February (11°C).
Average pressure in December
Portimão, 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 (1015.6mbar).
Average wind speed in December
Portimão, Portugal
- Average wind speed in December: 17.2km/h
The windiest month (with the highest average wind speed) is February (18.7km/h).
The calmest month (with the lowest average wind speed) is September (13.3km/h).
Average humidity in December
Portimão, Portugal
- Average humidity in December: 74%
The month with the highest relative humidity is April (76%).
The month with the lowest relative humidity is August (68%).
Average rainfall in December
Portimão, Portugal
- Average rainfall in December: 16mm
The wettest month (with the highest rainfall) is November (20mm).
The driest months (with the least rainfall) are July and August (1mm).
Average rainfall days in December
Portimão, Portugal
- Average rainfall days in December: 7.6 days
The month with the highest number of rainy days is March (10.5 days).
The month with the least rainy days is August (1 days).
Average sea temperature in December
Portimão, Portugal
- Average sea temperature in December: 17.4°C
The best month for swimming (with the highest average sea temperature) is September (21.2°C).
The coldest month (with the lowest average sea temperature) is March (16°C).
Average daylight in December /
Average sunshine in December
Portimão, 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 48min).
The month with the least sunshine is January (Average sunshine: 6h and 0min).
Average sunshine days in December
Portimão, Portugal
- Average sunshine days in December: 20.7 days
The month with the most sunshine days is July (29.5 days).
The month with the least sunshine days is November (17.4 days).
Average UV index in December
Portimão, Portugal
- Average UV index in December: 4
The months with the highest UV index are 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
Portimão, Portugal
- Average cloud cover in December: 29
The month with the most cloud cover is January (Cloud cover 33).
The months with the least cloud cover are July and August (Cloud cover 7).
Average visibility in December
Portimão, 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).
Portimão, Portugal
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