May weather forecastMontreal, Canada
May
Weather in May
May in Montreal welcomes the arrival of summer with an average high temperature jump to a pleasant 18.4°C (65.1°F). It is the transition month when snowfall finally comes to a halt, with only 1mm (0.04") of snow recorded for the entire month. May paves the way for the lush green scenery, and the city streets are dotted with flowering trees. The days get longer, and the clear skies invite locals and tourists alike to savor Montreal's cultural vibrancy. With humidity starting to inch up, the evenings become slightly muggy yet comfortably cool.Temperature
In Montreal, the average high-temperature in May soars, from a frosty 9.9°C (49.8°F) in April, to a refreshing 18.4°C (65.1°F). During the nights in May, Montreal experiences a consistent average temperature of 8.7°C (47.7°F).Humidity
With an average relative humidity of 73%, May is the least humid month.Rainfall
May is the month with the most rainfall. Rain falls for 17.8 days and accumulates 85mm (3.35") of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Montreal. During 0.3 snowfall days, in May, Montreal aggregates 1mm (0.04") of snow. Throughout the year, there are 74.1 snowfall days, and 1120mm (44.09") of snow is accumulated.Daylight
In Montreal, the average length of the day in May is 14h and 55min.On the first day of the month, sunrise is at 5:41 am and sunset at 8:01 pm. On the last day of May, in Montreal, Canada, sunrise is at 5:08 am and sunset at 8:35 pm EDT.
Sunshine
The average sunshine in May in Montreal is 8.1h.UV index
The average daily maximum UV index in May in Montreal, Canada, is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 4 during May translates into these guidelines:
Undertake protective steps - Recommendations to avoid sunburn are issued. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Montreal, Canada
- Average high temperature in May: 18.4°C
The warmest month (with the highest average high temperature) is July (25.8°C).
The month with the lowest average high temperature is January (-5.8°C).
- Average low temperature in May: 8.7°C
The month with the highest average low temperature is July (16.3°C).
The coldest month (with the lowest average low temperature) is January (-13.1°C).
Average pressure in May
Montreal, Canada
- Average pressure in May: 1014.8mbar
The month with the highest atmospheric pressure is November (1017.8mbar).
The month with the lowest atmospheric pressure is June (1012.4mbar).
Average wind speed in May
Montreal, Canada
- Average wind speed in May: 12.9km/h
The windiest month (with the highest average wind speed) is April (14.3km/h).
The calmest month (with the lowest average wind speed) is August (10.9km/h).
Average humidity in May
Montreal, Canada
- Average humidity in May: 73%
The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is May (73%).
Average rainfall in May
Montreal, Canada
- Average rainfall in May: 85mm
The wettest month (with the highest rainfall) is May (85mm).
The driest month (with the least rainfall) is September (55mm).
Average rainfall days in May
Montreal, Canada
- Average rainfall days in May: 17.8 days
The months with the highest number of rainy days are May and July (17.8 days).
The month with the least rainy days is January (5 days).
Average snowfall in May
Montreal, Canada
- Average snowfall in May: 1mm
The month with the highest snowfall is January (293mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in May
Montreal, Canada
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Montreal, Canada
- Average daylight in May: 14h and 54min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in May: 8h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 2h and 42min).
Average sunshine days in May
Montreal, Canada
- Average sunshine days in May: 11.8 days
The month with the most sunshine days is September (16.2 days).
The month with the least sunshine days is February (8.9 days).
Average UV index in May
Montreal, Canada
- Average UV index in May: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in May
Montreal, Canada
- Average cloud cover in May: 46
The month with the most cloud cover is February (Cloud cover 71).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in May
Montreal, Canada
- Average visibility in May: 9km
The months with the highest visibility are April, May, June, July, August, September, October and November (9km).
The months with the lowest visibility are January and February (7km).
