August weather forecastMontreal, Canada
August
Weather in August
Despite a slight decline from July’s high, August's average high temperature still lingers at a warm 24.8°C (76.6°F). Day-to-day weather in Montreal in August is comparable to how it was in July. The days continue to be warm, encouraging participation in water-based activities and park visits. As the valuable summer days wane, Montreal seizes every sunny day with outdoor cinemas, open-air theater performances, and food festivals. The weather remains suitable for exploring the city's landmarks, enjoying the culinary delights, or simply lounging in the city’s parks.Temperature
The transition into August in Montreal is marked with an average high-temperature of a still warm 24.8°C (76.6°F), showing an insignificant shift from July's 25.8°C (78.4°F). August's average low-temperature reading settles at a mild 15.3°C (59.5°F).Humidity
The average relative humidity in August is 76%.Rainfall
In August, the rain falls for 16.8 days. Throughout August, 78mm (3.07") of precipitation is accumulated. Throughout the year, in Montreal, there are 154.5 rainfall days, and 864mm (34.02") of precipitation is accumulated.Snowfall
In Montreal, snow does not fall in June through September.Daylight
In August, the average length of the day in Montreal, Canada, is 14h and 4min.On the first day of August, sunrise is at 5:39 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 7:33 pm EDT.
Sunshine
In Montreal, Canada, the average sunshine in August is 9.9h.UV index
In August, the average daily maximum UV index in Montreal is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: In August, a daily UV index of 5 turns into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Montreal, Canada
- Average high temperature in August: 24.8°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 August: 15.3°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 August
Montreal, Canada
- Average pressure in August: 1014.2mbar
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 August
Montreal, Canada
- Average wind speed in August: 10.9km/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 August
Montreal, Canada
- Average humidity in August: 76%
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 August
Montreal, Canada
- Average rainfall in August: 78mm
The wettest month (with the highest rainfall) is May (85mm).
The driest month (with the least rainfall) is September (55mm).
Average rainfall days in August
Montreal, Canada
- Average rainfall days in August: 16.8 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 August
Montreal, Canada
- Average snowfall in August: 0mm
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 August
Montreal, Canada
- Average snowfall days in August: 0 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 August /
Average sunshine in August
Montreal, Canada
- Average daylight in August: 14h and 6min
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 August: 9h and 54min
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 August
Montreal, Canada
- Average sunshine days in August: 12.2 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 August
Montreal, Canada
- Average UV index in August: 5
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 August
Montreal, Canada
- Average cloud cover in August: 36
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 August
Montreal, Canada
- Average visibility in August: 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).
