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Grand Manan Island Weather in May
With daytime temperatures of 11°C (52°F) and nighttime lows of 7°C (45°F), May in Grand Manan Island brings low temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 113 mm (4.4 in) falls on average.
Rainfall in Grand Manan Island in May
Based on our climate data of the past 30 years, about 12 days of rain are anticipated, with 113 mm (4.4 in) on average. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Grand Manan Island in May
Daytime highs in Grand Manan Island in May reach 11°C (52°F), with nights around 7°C (45°F). Even at the warmest part of the day, temperatures stay low. Dressing warmly from the start is the sensible approach. With overnight lows of 7°C (45°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.If you prefer dry days with pleasant temperatures, May may not be the ideal month to visit Grand Manan Island. Our weather planner can help you explore destinations with more pleasant weather conditions.
Grand Manan Island Temperature in May
Min Temperature
7°C (45°F)
Max Temperature
11°C (52°F)
Chance of Rain
41%
Precipitation
113 mm (4.4 in)
Rainy days
12 days
Grand Manan Island Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Grand Manan Island - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Grand Manan Island typically rise from around 13°C (55°F) at the start of May to approximately 18°C (64°F) by the end. Nights are cold, with lows typically ranging from 3°C (37°F) to 8°C (46°F).
Average temperatures in May
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather records for Grand Manan Island in May
Browse day-by-day weather records for Grand Manan Island spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Grand Manan Island historical weather extremes in May
Based on weather observations in Grand Manan Island between 2004 and 2026, these are the recorded extremes during May.
- Grand Manan Island recorded its highest May temperature of 28°C (82°F) on May 18, 2017.
- The lowest daytime temperature in May was 6°C (43°F), recorded on May 1, 2017.
- Nighttime temperatures dropped to -3°C (27°F) on May 10, 2023, marking the coldest May night on record.
Best Places in Canada in May
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in May →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Grand Manan Island in May
The weather can be unpredictable in May, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho.
What To Do in Grand Manan Island in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling5/10 -
Walking5/10 -
Barbeque2/10 -
Camping3/10 -
Outdoor sports5/10
Grand Manan Island 3-Day Forecast
More climate data for Grand Manan Island
See the full Grand Manan Island climate overview or explore weather in Canada.
Popular in May
Where to go in May - average daytime high across popular destinations.
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