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Saint John Weather in May
Thinking of visiting Saint John in May? Expect moderate temperatures reaching 13°C (55°F) during the day, dropping to 6°C (43°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in Saint John in May
This month experiences about 14 days of rain according to historical data, averaging 108 mm (4.3 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Saint John in May
Temperatures in Saint John in May top out at 13°C (55°F) and drop to 6°C (43°F) overnight. Even when the weather is stable, mornings and evenings can still feel distinctly cool. At 6°C (43°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.If you're looking for dry conditions and comfortable temperatures, May may not be the ideal month to visit Saint John. Our weather planner can help you explore destinations with more pleasant weather conditions.
Saint John Temperature in May
Min Temperature
6°C (43°F)
Max Temperature
13°C (55°F)
Chance of Rain
45%
Precipitation
108 mm (4.3 in)
Rainy days
14 days
Saint John Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Saint John - and find the best time to visit.
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 Saint John in May
Pack for changing conditions in Saint John in May. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Prepare for significant rainfall with proper waterproof clothing and shoes.
What To Do in Saint John in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling5/10 -
Walking5/10 -
Barbeque4/10 -
Camping3/10 -
Outdoor sports9/10
Saint John 3-Day Forecast
More climate data for Saint John
See the full Saint John 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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