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
Barreiro's average high-temperature in December sits at a moderate 15.7°C (60.3°F), showing little difference from the previous month. The nights of December in Barreiro cool down to an average low of 10.9°C (51.6°F), subtly lower than daytime highs.Humidity
The average relative humidity in December in Barreiro is 75%.Rainfall
In Barreiro, during December, the rain falls for 5.1 days and regularly aggregates up to 8mm (0.31") of precipitation. Throughout the year, in Barreiro, there are 54.2 rainfall days, and 61mm (2.4") of precipitation is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 07:35 and sunset at 17:15. On the last day of December, sunrise is at 07:54 and sunset at 17:25 WET.
Sunshine
The average sunshine in December is 5.9h.UV index
The months with the lowest UV index in Barreiro 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 health risk from exposure to the Sun's UV rays for the average person.Note: In December, a daily UV index of 4 turns into the following recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Barreiro?
What is the average humidity in December in Barreiro?
How many days does it rain in December in Barreiro?
What is the month with the shortest days in Barreiro?
How many hours of daylight does Barreiro have in December?
What time are sunrise and sunset in December in Barreiro?
How many hours of sunshine does Barreiro have in December?
What is the month with the lowest UV index in Barreiro?
How high is the UV index in December in Barreiro?
Average temperature in December
Barreiro, Portugal
- Average high temperature in December: 15.7°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 (14.9°C).
- Average low temperature in December: 10.9°C
The month with the highest average low temperature is July (17.9°C).
The coldest month (with the lowest average low temperature) is February (9.8°C).
Average pressure in December
Barreiro, Portugal
- Average pressure in December: 1022.6mbar
The month with the highest atmospheric pressure is December (1022.6mbar).
The month with the lowest atmospheric pressure is April (1015.7mbar).
Average wind speed in December
Barreiro, Portugal
- Average wind speed in December: 15km/h
The windiest month (with the highest average wind speed) is February (16.5km/h).
The calmest month (with the lowest average wind speed) is September (13.1km/h).
Average humidity in December
Barreiro, Portugal
- Average humidity in December: 75%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (68%).
Average rainfall in December
Barreiro, Portugal
- Average rainfall in December: 8mm
The wettest month (with the highest rainfall) is November (15mm).
The driest months (with the least rainfall) are June, July and August (1mm).
Average rainfall days in December
Barreiro, Portugal
- Average rainfall days in December: 5.1 days
The month with the highest number of rainy days is November (9.3 days).
The month with the least rainy days is August (0.8 days).
Average daylight in December /
Average sunshine in December
Barreiro, 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 5min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in December
Barreiro, Portugal
- Average sunshine days in December: 23.5 days
The month with the most sunshine days is July (29.7 days).
The month with the least sunshine days is November (17.7 days).
Average UV index in December
Barreiro, 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
Barreiro, Portugal
- Average cloud cover in December: 34
The month with the most cloud cover is January (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in December
Barreiro, 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).
Barreiro, Portugal
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