Climate of Sully Island

The island Sully Island has a oceanic climate. There is rainfall during all months of the year. The average annual temperature for Sully Island is 26° degrees and there is about 60 inch of rain in a year. It is dry for 207 days a year with an average humidity of 84% and an UV-index of 3.

Climate averages for the whole year

Day: the average daily temperature during the day is between 7°C and 19°C
Night:the average nighttime temperature is between 4°C and 13°C
Rain: it rains 114 days and there is a total of approximately 153 mm rainfall
Snow: it snows an average of 3 days per year
Sun hours: throughout the year there are 2278 sun hours

Maximum temperature:	between 7°C and 19°C
Warmest month:	19°C in July
Coldest month:	7°C in January
Night temperature:	between 4°C and 13°C
Dry days:	248 days
Days with rain:	114 days
Days with snow:	3 days
Total rain sum:	153 mm
Hours of sunshine:	2278 hours

Climate of Sully Island
Temperature graph
Precipitation graph
Climate chart of Sully Island
The best travel time for Sully Island
Climate of Sully Island by month
Experiences with the weather of Sully Island

Temperature graph

This graph shows the average maximum temperature (red) and minimum temperature (blue) for Sully Island.

Precipitation graph

This graph shows the average amount of rainfall per month for Sully Island.

Climate table of Sully Island

In this climate table you can see at a glance what the average weather per month is for Sully Island. The data has been collected over a 30-year period, from which an average per month has been derived. From year to year the differences may be larger or smaller, but with this climate table you have a good idea of what the weather for Sully Island might be like in a given month.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Day temp. (°F)	45	46	50	54	58	63	66	65	63	58	51	47
Night temp. (°F)	39	39	40	42	47	52	55	56	53	50	45	42
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Precipitation (inch)	5	5	5	2	6	4	4	6	3	6	8	7
Days with rain	10	7	9	8	9	8	10	11	9	9	12	12
Days with snow	1	1	-	-	-	-	-	-	-	-	-	1
Dry days	20	20	22	22	22	22	21	20	21	22	18	18
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sun hours per day	4	4	6	8	8	8	8	8	7	5	4	4
Wind force (Bft)	4	4	4	3	3	3	3	3	3	3	4	4
UV-index	2	2	2	3	4	4	4	4	4	3	2	2

Best time to visit Sully Island

The best time to visit Sully Island, Wales is in July and August. In this period you have a pleasant temperature and almost no precipitation. On the island of Sully Island, the warmest month is July with 66°F and the coldest is January with 45°F.

Climate of Sully Island by month

What is the average climate in a given month for Sully Island? Click on a month to see all monthly averages for sunshine, maximum and minimum temperatures, percent chance of rain per day, snowfall and number of rainy days.

January