Mary's Harbour weather by month & the best time to visit
Canada · seaside town · subarctic climate
The best time to visit Mary's Harbour is August — its sunniest month (Sunshine Score 48/100), with July close behind. Mary's Harbour averages about 1,602 hours of sunshine a year. Daytime highs around 16°C / 61°F and roughly 87 mm of rain in August.
When is the best time to visit Mary's Harbour?
For sunshine, the best time to visit Mary's Harbour is August, then July. The dullest month is January (0/100, 84 mm of rain). The full month-by-month picture is in the table below.
How sunny is Mary's Harbour?
Mary's Harbour isn't a sunny place by world standards: about 1,602 hours of sunshine a year. 48 Sunshine Score points separate August (48) from January (0), so the month you pick matters. It ranks #223 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 | -14° / 7°F | 84 mm | 0 | -2° / 28°F |
| February | 0 | -7° / 19°F | -15° / 5°F | 84 mm | 1 | -2° / 28°F |
| March | 0 | -3° / 27°F | -10° / 14°F | 90 mm | 2 | -2° / 28°F |
| April | 0 | 1° / 34°F | -4° / 25°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 | 48 | 16° / 61°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 | -3° / 27°F | -9° / 16°F | 98 mm | 0 | 1° / 34°F |
Sea temperature in Mary's Harbour by month
The sea off Mary's Harbour 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
Mary's Harbour: questions and answers
What kind of destination is Mary's Harbour?
Mary's Harbour is a seaside town in Canada with a subarctic climate — the sea reaches 13°C at its warmest.
How many hours of sunshine does Mary's Harbour get a year?
Mary's Harbour gets about 1,602 hours of sunshine a year, at its best around August.
When is the best time to visit Mary's Harbour?
The sunniest time to visit Mary's Harbour is August, when the Sunshine Score peaks at 48/100 (with July close behind). Expect daytime highs around 16°C / 61°F.
What is the least sunny month in Mary's Harbour?
January is the least sunny month in Mary's Harbour, scoring 0/100 with about 84 mm of rain.
What is the sea temperature in Mary's Harbour?
The sea in Mary's Harbour 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 Mary's Harbour?
The typical midday UV index in Mary's Harbour 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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