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
December's presence in Guia marks an average high-temperature of a still enjoyable 16.4°C (61.5°F), subtly varied from November's 18.1°C (64.6°F). In Guia, the nighttime temperature shows a slight difference from the daytime high, averaging to a fresh 11.9°C (53.4°F) during December.Humidity
January, March, April and December, with an average relative humidity of 75%, are the most humid months in Guia, Portugal.Rainfall
In Guia, in December, during 6.9 rainfall days, 11mm (0.43") of precipitation is typically accumulated. In Guia, during the entire year, the rain falls for 62.4 days and collects up to 78mm (3.07") of precipitation.Sea temperature
In Guia, the average seawater temperature in December is 17°C (62.6°F).Note: Most people do not enjoy swimming in water that is 17°C (62.6°F). Breathing becomes increasingly challenging as the water temperature dips under 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 the month, sunrise is at 07:28 and sunset at 17:16. On the last day of December, sunrise is at 07:46 and sunset at 17:26 WET.
Sunshine
In Guia, the average sunshine in December is 6.4h.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 estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 4 in December interprets into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Frequently asked questions
What are the temperatures in Guia in December?
What is the most humid month in Guia?
What is the average humidity in December in Guia?
How many days does it rain in December in Guia?
What is the sea water temperature in December in Guia?
What is the month with the shortest days in Guia?
What is the average length of the day in December in Guia?
What time are sunrise and sunset in December in Guia?
How long on average sun shines in December in Guia?
What are the months with the lowest UV index in Guia?
What is the UV index reading in December in Guia?
Average temperature in December
Guia, Portugal
- Average high temperature in December: 16.4°C
The warmest month (with the highest average high temperature) is August (27.4°C).
The month with the lowest average high temperature is January (15°C).
- Average low temperature in December: 11.9°C
The month with the highest average low temperature is August (19.7°C).
The coldest month (with the lowest average low temperature) is February (10.6°C).
Average pressure in December
Guia, 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 (1015.5mbar).
Average wind speed in December
Guia, Portugal
- Average wind speed in December: 16.6km/h
The windiest month (with the highest average wind speed) is February (18.1km/h).
The calmest month (with the lowest average wind speed) is September (12.5km/h).
Average humidity in December
Guia, Portugal
- Average humidity in December: 75%
The months with the highest relative humidity are January, March, April and December (75%).
The month with the lowest relative humidity is August (64%).
Average rainfall in December
Guia, Portugal
- Average rainfall in December: 11mm
The wettest month (with the highest rainfall) is November (14mm).
The driest month (with the least rainfall) is July (0mm).
Average rainfall days in December
Guia, Portugal
- Average rainfall days in December: 6.9 days
The month with the highest number of rainy days is November (9.2 days).
The month with the least rainy days is August (0.7 days).
Average sea temperature in December
Guia, Portugal
- Average sea temperature in December: 17°C
The best months for swimming (with the highest average sea temperature) are August and September (21°C).
The coldest month (with the lowest average sea temperature) is February (15°C).
Average daylight in December /
Average sunshine in December
Guia, 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 0min).
Average sunshine days in December
Guia, Portugal
- Average sunshine days in December: 22 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is November (19.2 days).
Average UV index in December
Guia, 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
Guia, Portugal
- Average cloud cover in December: 28
The month with the most cloud cover is January (Cloud cover 31).
The month with the least cloud cover is July (Cloud cover 5).
Average visibility in December
Guia, 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).
Guia, Portugal
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