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 arrival of December sees a recorded average high-temperature of a still refreshing 17°C (62.6°F), showing little divergence from the previous month's conditions. The December average low temperature, marginally lower than the daytime high, records at a moderate 15.5°C (59.9°F).Humidity
In Porto Martins, Portugal, the average relative humidity in December is 79%.Rainfall
The month with the most rainfall is December, when the rain falls for 19.3 days and typically aggregates up to 94mm (3.7") of precipitation.Daylight
The month with the shortest days is December, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 07:47 and sunset at 17:27. On the last day of December, in Porto Martins, Portugal, sunrise is at 08:06 and sunset at 17:36 -01.
Sunshine
The average sunshine in December is 5.1h.UV index
The months with the lowest UV index in Porto Martins are January through April and December, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 4 during December translates into the following guidance:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Frequently asked questions
What are December temperatures in Porto Martins?
What is the average humidity in December in Porto Martins?
What is the rainiest month in Porto Martins?
How many days does it rain in December in Porto Martins?
What is the month with the shortest days in Porto Martins?
What is the average length of the day in December in Porto Martins?
What time are sunrise and sunset in December in Porto Martins?
How long on average sun shines in December in Porto Martins?
What are the months with the lowest UV index in Porto Martins?
What is the UV index intensity in December in Porto Martins?
Average temperature in December
Porto Martins, Portugal
- Average high temperature in December: 17°C
The warmest month (with the highest average high temperature) is August (22.8°C).
The month with the lowest average high temperature is March (15.6°C).
- Average low temperature in December: 15.5°C
The month with the highest average low temperature is August (21.6°C).
The coldest months (with the lowest average low temperature) are February and March (14.3°C).
Average pressure in December
Porto Martins, Portugal
- Average pressure in December: 1019.2mbar
The month with the highest atmospheric pressure is July (1024.4mbar).
The month with the lowest atmospheric pressure is October (1016.6mbar).
Average wind speed in December
Porto Martins, Portugal
- Average wind speed in December: 29.8km/h
The windiest month (with the highest average wind speed) is December (29.8km/h).
The calmest month (with the lowest average wind speed) is July (16.6km/h).
Average humidity in December
Porto Martins, Portugal
- Average humidity in December: 79%
The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is November (77%).
Average rainfall in December
Porto Martins, Portugal
- Average rainfall in December: 94mm
The wettest month (with the highest rainfall) is December (94mm).
The driest month (with the least rainfall) is July (15mm).
Average rainfall days in December
Porto Martins, Portugal
- Average rainfall days in December: 19.3 days
The month with the highest number of rainy days is October (19.5 days).
The month with the least rainy days is July (9 days).
Average daylight in December /
Average sunshine in December
Porto Martins, Portugal
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 24min).
The month with the least sunshine is November (Average sunshine: 5h and 0min).
Average sunshine days in December
Porto Martins, Portugal
- Average sunshine days in December: 7.3 days
The month with the most sunshine days is July (18.1 days).
The month with the least sunshine days is October (6.6 days).
Average UV index in December
Porto Martins, Portugal
- Average UV index in December: 4
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, April and December (UV index 4).
Average cloud cover in December
Porto Martins, Portugal
- Average cloud cover in December: 50
The month with the most cloud cover is November (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 40).
Average visibility in December
Porto Martins, 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).
Porto Martins, Portugal
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