What’s the climate like in Sully Island?
The current climate of Sully Island features average monthly temperatures ranging from highs of 20°C during the day to lows of 9°C. The average yearly temperature is around 15°C. At night, temperatures in the colder months average around 3°C and in the warmer months around 13°C.
The highest temperature recorded in Sully Island in recent years was 35°C in July 2022. The lowest daytime temperature recorded was -3°C in March 2018.
On average, Sully Island gets 1177 mm of precipitation each year. Of this, about 5,5 cm is snowfall. For comparison, London gets 701 mm of precipitation each year.
Best time to visit Sully Island?
The best time to visit Sully Island for sunny weather is June through September. During this period, you'll have good temperatures and not too much rain, making it a great time to visit Sully Island. In the other months of the year, there's too much rain or the temperature isn't ideal for a visit if you want sunny and pleasant weather.
Climate Table of Sully Island
The climate table of Sully Island shows the average temperatures, precipitation, snow, and UV index per month. The table gives an overview of the average day and night temperatures in degrees Celsius, the total amount of precipitation in millimetres, the total snowfall in centimetres, and the UV index for each month. Precipitation is always measured as water, even if it's snow or hail.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
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| Temp. max (°C) | 9 | 9 | 11 | 13 | 16 | 19 | 20 | 20 | 19 | 15 | 11 | 10 |
| Temp. min (°C) | 4 | 4 | 5 | 6 | 9 | 11 | 13 | 13 | 12 | 9 | 5 | 5 |
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| Precipitation (mm) | 128 | 99 | 102 | 45 | 63 | 68 | 79 | 95 | 92 | 133 | 141 | 132 |
| Snow (cm) | 1,1 | 0,1 | 1,7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0,7 | 1,9 |
| UV Index | 1 | 3 | 4 | 6 | 7 | 7 | 6 | 6 | 5 | 3 | 2 | 1 |
Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.
- Average yearly temperature: 15°C
- Highest temperature: 20°C in July and August
- Lowest temperature: 9°C in January and February
- Precipitation*: 1177 mm per year, averaging 98 mm per month
- Snowfall: 5,5 cm per year
- Driest months: 45 mm in April, 63 mm in May and 68 mm in June
- Wettest months: 141 mm in November, 133 mm in October and 132 mm in December
*Precipitation is measured as a combination of rain, snow, and hail
Table of Contents
Average Temperature per Month in Sully Island
This graph shows the average maximum temperatures per month in Sully Island, Wales. The temperatures are shown in degrees Celsius and the average is calculated based on the recorded temperatures per month from past years.
Average Precipitation per Month in Sully Island
This graph shows how much precipitation Sully Island, Wales, gets on average per month. Precipitation is always measured as water, even if it's snow or hail. This makes it easy to compare how much has fallen, regardless of the form of precipitation. The amount of precipitation is measured in millimetres and the average is calculated based on the recorded precipitation per month from past years.
Average Snowfall per Month in Sully Island
This graph shows how much snow Sully Island, Wales, gets on average per month. The amount of snowfall is measured in centimetres and the average is calculated based on the recorded snowfall per month from past years.
Average UV Index per Month in Sully Island
This graph shows the average UV index per month in Sully Island, Wales. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
Yearly Temperature in Sully Island
This graph shows the average yearly temperature in Sully Island, Wales. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.
Total Yearly Precipitation in Sully Island
This chart shows the total yearly precipitation in Sully Island, Wales, over the past few years. The total yearly precipitation, measured in millimetres, is the sum of all the rain that fell in the twelve months of that year.
Total Yearly Snowfall in Sully Island
This chart shows the total yearly snowfall in Sully Island, Wales, over the past few years. The total yearly snowfall, measured in centimetres, is the sum of all the snow that fell in the twelve months of that year.
Weather experiences in Sully Island
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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.
