Temperatures in December
It's cool to moderate in December in São Sebastião with an average temperature of 18°C. Temperatures this month range from a low of 17°C to a high of 19°C. At night, you can expect temperatures between 13°C and 16°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for São Sebastião in December. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of December
The month of December starts in São Sebastião with mild temperatures, averaging around 19°C during the day and nights close to 15°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month.
Mid-December
By mid-December, the average daytime temperature stays the same at 19°C, with nights close to 15°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of December
By the end of December, the average daytime temperature in São Sebastião will be around 18°C, with nights close to 14°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
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Precipitation in December
In December, there is an average of 121 mm of precipitation, spread over 13 days. The wind speed is around 5 Bft, mostly coming from the South.
The average precipitation chance is 43% per day this month. The weather’s variable. There are also a few days with lower precipitation chances.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in December for São Sebastião. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
São Sebastião in December |
London | ||
|---|---|---|---|
 Average Temperature |
18°C | 9°C | |
 High Temp |
19°C | 11°C | |
| Low Temp |
17°C | 8°C | |
 Total Precipitation |
121 mm | 67 mm | |
| Rainy Days |
13 days | 10 days | |
November
UV index
The UV index is a maximum of 4 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is December a good time to visit São Sebastião?
After some sun? Then December isn’t the best time to be in São Sebastião. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for São Sebastião in December
With 21°C, São Sebastião hit the highest temperature in the last 10 years in December 2019. The lowest daytime temperature in this month was 12°C in 2022. The extreme night temperatures ranged from a low of 6°C to a high of 19°C.
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Daily Temperature in December in São Sebastião
This chart shows the average daily temperatures, both day and night, for each day in December in São Sebastião, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in December in São Sebastião
The chart below shows the average daily precipitation in December for São Sebastião, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for December, you can expect around 13 days of rain in São Sebastião.
Daily UV Index in December in São Sebastião
This chart shows the average daily UV index in December in São Sebastião, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in December in São Sebastião Over the Years
This chart shows the average temperature in December in São Sebastião, measured in degrees Celsius, over the past years.
Total Precipitation in December in São Sebastião Over the Years
This chart shows the average precipitation in December in São Sebastião, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in December for São Sebastião
Click on a specific day in December for detailed info on the typical weather on that day in São Sebastião. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in December in São Sebastião
Have you been to São Sebastião in December?
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Average Weather in São Sebastião by Month
Click on a month below to see detailed weather info for São Sebastião. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of São Sebastião for all months at once
