Temperatures in December
It's cool in December in Sully Island with an average temperature of 10°C. Temperatures this month range from a low of 8°C to a high of 11°C. At night, you can expect temperatures between 2°C and 8°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Sully Island 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 Sully Island with cold temperatures, averaging around 10°C during the day and nights close to 5°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 10°C, with nights close to 6°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
End of December
By the end of December, the average daytime temperature in Sully Island will be around 10°C, with nights close to 7°C. There’s a significant chance of many days with precipitation.
Precipitation in December
In December, there is an average of 132 mm of precipitation, spread over 19 days. Of the total precipitation, about 2,0 cm falls as snow in December. The wind speed is around 4 Bft, mostly coming from the Southwest.
The average precipitation chance this month is 62% per day. Though that seems frequent, 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 Sully Island. 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.
Sully Island in December |
London | ||
|---|---|---|---|
 Average Temperature |
10°C | 9°C | |
 High Temp |
11°C | 11°C | |
| Low Temp |
8°C | 8°C | |
 Total Precipitation |
132 mm | 67 mm | |
| Rainy Days |
19 days | 10 days | |
 Total Snowfall |
2,0 cm | 1,2 cm | |
| Snowy Days |
1 day | 1 day | |
November
UV index
The UV index is a maximum of 2 this month. That's a low value on the intensity scale of 1 to 11. The risk of sunburn is minimal at this time.
Is December a good time to visit Sully Island?
After some sun? Then December isn’t the best time to be in Sully Island. There’s too much chance of rain this month.
Check out the climate of Sully Island for all months and discover the best travel time
Daily Temperature in December in Sully Island
This chart shows the average daily temperatures, both day and night, for each day in December in Sully Island, 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 Sully Island
The chart below shows the average daily precipitation in December for Sully Island, 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 19 days of rain in Sully Island.
Daily Snowfall in December in Sully Island
This chart shows the average daily snowfall in December in Sully Island, measured in centimetres. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in December.
Daily UV Index in December in Sully Island
This chart shows the average daily UV index in December in Sully Island, 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 Sully Island Over the Years
This chart shows the average temperature in December in Sully Island, measured in degrees Celsius, over the past years.
Total Precipitation in December in Sully Island Over the Years
This chart shows the average precipitation in December in Sully Island, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Snowfall in December in Sully Island per year
This chart shows the average snowfall in December in Sully Island, measured in centimetres, over the past years.
Daily climate in December for Sully Island
Click on a specific day in December for detailed info on the typical weather on that day in Sully Island. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in December in Sully Island
Have you been to Sully Island in December?
Share your weather experience in December in Sully Island.
Average Weather in Sully Island by Month
Click on a month below to see detailed weather info for Sully Island. 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 Sully Island for all months at once
