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
Porto Alegre's December showcases an average high-temperature of a still warm 27.5°C (81.5°F), hardly distinct from November's 27.1°C (80.8°F). Porto Alegre's nocturnal average in December closely mirrors its daytime temperatures, settling at a still moderately hot 26.6°C (79.9°F).Heat index
December's heat index is appraised at a hot 31°C (87.8°F). Exhaustion becomes probable with enduring exposure and activity, potentially causing heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
Humidity
In Porto Alegre, the average relative humidity in December is 79%.Rainfall
In December, in Porto Alegre, the rain falls for 28.6 days. Throughout December, 159mm (6.26") of precipitation is accumulated. In Porto Alegre, São Tomé and Príncipe, during the entire year, the rain falls for 241.7 days and collects up to 1287mm (50.67") of precipitation.Daylight
In December, the average length of the day in Porto Alegre is 12h and 7min.On the first day of December in Porto Alegre, sunrise is at 05:19 and sunset at 17:26. On the last day of the month, sunrise is at 05:33 and sunset at 17:40 GMT.
Sunshine
In December, the average sunshine is 8.2h.UV index
The months with the highest UV index in Porto Alegre are January through May, October through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In December, a daily UV index of 7 turns into the following recommendations:
Shun overexposure. Protection from sun ravages is indispensable. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. 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 usual temperature for Porto Alegre in December?
What is the average humidity in December in Porto Alegre?
How much does it rain in Porto Alegre in December?
What is the average length of the day in December in Porto Alegre?
When is the sunrise / sunset in December in Porto Alegre?
How long on average sun shines in December in Porto Alegre?
What is the month with the highest UV index in Porto Alegre?
What is the UV index intensity in December in Porto Alegre?
Average temperature in December
Porto Alegre, São Tomé and Príncipe
- Average high temperature in December: 27.5°C
The warmest month (with the highest average high temperature) is March (28.8°C).
The month with the lowest average high temperature is July (24.5°C).
- Average low temperature in December: 26.6°C
The month with the highest average low temperature is March (27.5°C).
The coldest month (with the lowest average low temperature) is July (23°C).
Average pressure in December
Porto Alegre, São Tomé and Príncipe
- Average pressure in December: 1010.6mbar
The month with the highest atmospheric pressure is July (1014.3mbar).
The month with the lowest atmospheric pressure is February (1009.8mbar).
Average wind speed in December
Porto Alegre, São Tomé and Príncipe
- Average wind speed in December: 10.8km/h
The windiest month (with the highest average wind speed) is July (17.7km/h).
The calmest month (with the lowest average wind speed) is December (10.8km/h).
Average humidity in December
Porto Alegre, São Tomé and Príncipe
- Average humidity in December: 79%
The months with the highest relative humidity are August, September and October (83%).
The month with the lowest relative humidity is March (76%).
Average rainfall in December
Porto Alegre, São Tomé and Príncipe
- Average rainfall in December: 159mm
The wettest month (with the highest rainfall) is November (224mm).
The driest month (with the least rainfall) is July (9mm).
Average rainfall days in December
Porto Alegre, São Tomé and Príncipe
- Average rainfall days in December: 28.6 days
The month with the highest number of rainy days is December (28.6 days).
The month with the least rainy days is June (7.3 days).
Average daylight in December /
Average sunshine in December
Porto Alegre, São Tomé and Príncipe
- Average daylight in December: 12h and 1min
The month with the longest days is June (Average daylight: 12h and 6min).
The months with the shortest days are March and September (Average daylight: 12h and 6min).
- Average sunshine in December: 8h and 1min
The month with the most sunshine is February (Average sunshine: 8h and 36min).
The month with the least sunshine is August (Average sunshine: 5h and 0min).
Average sunshine days in December
Porto Alegre, São Tomé and Príncipe
- Average sunshine days in December: 1.5 days
The month with the most sunshine days is June (16.4 days).
The month with the least sunshine days is December (1.5 days).
Average UV index in December
Porto Alegre, São Tomé and Príncipe
- Average UV index in December: 7
The months with the highest UV index are January, February, March, April, May, October, November and December (UV index 7).
The month with the lowest UV index is July (UV index 5).
Average cloud cover in December
Porto Alegre, São Tomé and Príncipe
- Average cloud cover in December: 41
The month with the most cloud cover is August (Cloud cover 65).
The month with the least cloud cover is February (Cloud cover 37).
Average visibility in December
Porto Alegre, São Tomé and Príncipe
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September and December (10km).
The months with the lowest visibility are October and November (9km).
Porto Alegre, São Tomé and Príncipe
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