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
December
Weather in December
Temperature
Santiago do Cacém's average high-temperature in December is a still comfortable 16°C (60.8°F), marking an insignificant difference from the 17.7°C (63.9°F) of November. Nighttime readings during December register a minimal drop from daytime highs, averaging at a cool 12.5°C (54.5°F).Humidity
In Santiago do Cacém, the average relative humidity in December is 74%.Rainfall
In Santiago do Cacém, in December, during 9.4 rainfall days, 42mm (1.65") of precipitation is typically accumulated. In Santiago do Cacém, during the entire year, the rain falls for 94.6 days and collects up to 327mm (12.87") of precipitation.Daylight
The month with the shortest days is December, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 07:32 and sunset at 17:15. On the last day of the month, sunrise is at 07:50 and sunset at 17:25 WET.
Sunshine
The average sunshine in December in Santiago do Cacém is 6.2h.UV index
The months with the lowest UV index in Santiago do Cacém are January through April, November and December, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 4 during December leads to these advisories:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Santiago do Cacém?
What is the average humidity in December in Santiago do Cacém?
How much does it rain in Santiago do Cacém in December?
What is the month with the shortest days in Santiago do Cacém?
What is the average length of the day in December in Santiago do Cacém?
When are sunrise and sunset in December in Santiago do Cacém?
How long on average sun shines in December in Santiago do Cacém?
What are the months with the lowest UV index in Santiago do Cacém?
What is the UV index intensity in December in Santiago do Cacém?
Average temperature in December
Santiago do Cacém, Portugal
- Average high temperature in December: 16°C
The warmest month (with the highest average high temperature) is August (24.2°C).
The month with the lowest average high temperature is February (14.8°C).
- Average low temperature in December: 12.5°C
The months with the highest average low temperature are August and September (18.8°C).
The coldest month (with the lowest average low temperature) is February (10.8°C).
Average pressure in December
Santiago do Cacém, 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
Santiago do Cacém, Portugal
- Average wind speed in December: 18km/h
The windiest month (with the highest average wind speed) is February (19.4km/h).
The calmest month (with the lowest average wind speed) is September (15.1km/h).
Average humidity in December
Santiago do Cacém, Portugal
- Average humidity in December: 74%
The month with the highest relative humidity is April (76%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Santiago do Cacém, Portugal
- Average rainfall in December: 42mm
The wettest month (with the highest rainfall) is November (56mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in December
Santiago do Cacém, Portugal
- Average rainfall days in December: 9.4 days
The month with the highest number of rainy days is November (13.4 days).
The month with the least rainy days is August (1.1 days).
Average daylight in December /
Average sunshine in December
Santiago do Cacém, Portugal
- Average daylight in December: 9h and 4min
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 36min).
- Average sunshine in December: 6h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).
Average sunshine days in December
Santiago do Cacém, Portugal
- Average sunshine days in December: 20.4 days
The month with the most sunshine days is August (29.4 days).
The month with the least sunshine days is April (15.3 days).
Average UV index in December
Santiago do Cacém, 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, April, November and December (UV index 4).
Average cloud cover in December
Santiago do Cacém, Portugal
- Average cloud cover in December: 31
The month with the most cloud cover is January (Cloud cover 37).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in December
Santiago do Cacém, 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).
