Colonsay weather by month & the best time to visit
United Kingdom · seaside town · oceanic / maritime climate
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Colonsay is short on reliable sunshine. Its best month is July (Score 38/100) — for stronger sun, try one of the nearby alternatives.
When is the best time to visit Colonsay?
Colonsay never gets truly sunny weather: July is as good as it gets at 38/100, and January is the low point (0/100). If sunshine is the point of the trip, the nearby alternatives do better.
How sunny is Colonsay?
Colonsay isn't a sunny place by world standards: about 1,375 hours of sunshine a year. July (38/100) is noticeably better than January (0). It ranks #21 of 48 destinations in United Kingdom for annual sunshine, above the national median of 1,345 hours. The year's 1,525 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | 8° / 46°F | 6° / 43°F | 165 mm | 0 | 9° / 48°F |
| February | 0 | 7° / 45°F | 5° / 41°F | 122 mm | 0 | 9° / 48°F |
| March | 0 | 8° / 46°F | 5° / 41°F | 112 mm | 1 | 8° / 46°F |
| April | 12 | 10° / 50°F | 7° / 45°F | 79 mm | 3 | 9° / 48°F |
| May | 23 | 12° / 54°F | 9° / 48°F | 94 mm | 4 | 12° / 54°F |
| June | 34 | 14° / 57°F | 11° / 52°F | 98 mm | 4 | 13° / 55°F |
| July | 38 | 15° / 59°F | 13° / 55°F | 113 mm | 4 | 14° / 57°F |
| August | 36 | 15° / 59°F | 13° / 55°F | 134 mm | 3 | 15° / 59°F |
| September | 38 | 15° / 59°F | 12° / 54°F | 119 mm | 2 | 14° / 57°F |
| October | 25 | 13° / 55°F | 10° / 50°F | 162 mm | 1 | 13° / 55°F |
| November | 10 | 10° / 50°F | 8° / 46°F | 160 mm | 0 | 12° / 54°F |
| December | 5 | 9° / 48°F | 7° / 45°F | 167 mm | 0 | 10° / 50°F |
Sea temperature in Colonsay by month
The sea off Colonsay is warmest in August at around 15°C / 59°F, and coolest in March at 8°C / 46°F. It never reaches comfortable swimming temperatures (21°C+). Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Colonsay: questions and answers
What kind of destination is Colonsay?
Colonsay is a seaside town in United Kingdom with a oceanic / maritime climate — the sea reaches 15°C at its warmest.
How many hours of sunshine does Colonsay get a year?
Colonsay gets about 1,375 hours of sunshine a year, at its best around July.
When is the best time to visit Colonsay?
Colonsay is short on reliable sunshine — its best month is only July at 38/100. For a sunnier trip, see the nearest strong-sun alternatives listed on the page.
What is the least sunny month in Colonsay?
January is the least sunny month in Colonsay, scoring 0/100 with about 165 mm of rain.
What is the sea temperature in Colonsay?
The sea in Colonsay ranges from about 8°C (March) to 15°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Colonsay?
The typical midday UV index in Colonsay peaks around 4 (moderate) in May, easing to about 0 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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