St. Lewis weather by month & the best time to visit
Canada · seaside town · subarctic climate
St. Lewis is short on reliable sunshine. Its best month is July (Score 42/100) — for stronger sun, try one of the nearby alternatives.
When is the best time to visit St. Lewis?
St. Lewis never gets truly sunny weather: July is as good as it gets at 42/100, and January is the low point (0/100). If sunshine is the point of the trip, the nearby alternatives do better.
How sunny is St. Lewis?
St. Lewis isn't a sunny place by world standards: about 1,602 hours of sunshine a year. July (42/100) is noticeably better than January (0). It ranks #222 of 242 destinations in Canada for annual sunshine, below the national median of 2,024 hours. The year's 1,067 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 | -7° / 19°F | -15° / 5°F | 84 mm | 0 | -2° / 28°F |
| February | 0 | -7° / 19°F | -15° / 5°F | 84 mm | 1 | -2° / 28°F |
| March | 0 | -4° / 25°F | -10° / 14°F | 90 mm | 2 | -2° / 28°F |
| April | 0 | 1° / 34°F | -5° / 23°F | 77 mm | 3 | 0° / 32°F |
| May | 0 | 5° / 41°F | 0° / 32°F | 78 mm | 4 | 2° / 36°F |
| June | 12 | 10° / 50°F | 4° / 39°F | 89 mm | 5 | 8° / 46°F |
| July | 42 | 15° / 59°F | 9° / 48°F | 88 mm | 5 | 12° / 54°F |
| August | 42 | 15° / 59°F | 10° / 50°F | 87 mm | 4 | 13° / 55°F |
| September | 24 | 12° / 54°F | 6° / 43°F | 86 mm | 3 | 11° / 52°F |
| October | 0 | 6° / 43°F | 2° / 36°F | 104 mm | 1 | 7° / 45°F |
| November | 0 | 1° / 34°F | -3° / 27°F | 102 mm | 0 | 4° / 39°F |
| December | 0 | -4° / 25°F | -9° / 16°F | 98 mm | 0 | 1° / 34°F |
Sea temperature in St. Lewis by month
The sea off St. Lewis is warmest in August at around 13°C / 55°F, and coolest in January at -2°C / 28°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
St. Lewis: questions and answers
What kind of destination is St. Lewis?
St. Lewis is a seaside town in Canada with a subarctic climate — the sea reaches 13°C at its warmest.
How many hours of sunshine does St. Lewis get a year?
St. Lewis gets about 1,602 hours of sunshine a year, at its best around July.
When is the best time to visit St. Lewis?
St. Lewis is short on reliable sunshine — its best month is only July at 42/100. For a sunnier trip, see the nearest strong-sun alternatives listed on the page.
What is the least sunny month in St. Lewis?
January is the least sunny month in St. Lewis, scoring 0/100 with about 84 mm of rain.
What is the sea temperature in St. Lewis?
The sea in St. Lewis ranges from about -2°C (January) to 13°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in St. Lewis?
The typical midday UV index in St. Lewis peaks around 5 (moderate) in June, 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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