June to September: Summer
The summertime in Montreal is another beautiful time to visit. The average temperature in summer is between 68 and 79 degrees Fahrenheit (20 to 26 degrees Celsius). It can be humid and feel hotter than the actual temperature.
You can enjoy several outdoor activities, sip cocktails on patios, and attend fun festivals during your stay. Most of the city is easily explored by walking or cycling. Ride rollercoasters at the La Ronde Amusement Park, cruise along the St. Lawrence River, and watch street performers in the Old Port in downtown.
[ Read: Amusement Parks in Canada ]
Throughout the summer in Montreal, the streets are packed as tourists rush to all the festivities. High demand for spending time in Montreal during summer events means higher hotel and airfare rates.
The Montreal International Jazz Festival and the 10-day MURAL Festival are in June. Also, in June is the Formula One Grand Prix — tickets are a must for auto-racing fans. Saint Jean Baptiste Day occurs on June 24th, while Canada Day occurs on July 1st. Both holidays are celebrated with parties and fireworks. Consider the Montreal Pride Festival, the Just for Laughs Festival in July, and the Osheaga music festival between the end of July and the beginning of August.
Packing tip: Bring an umbrella, particularly if you travel to Montreal in August, as the weather can be unpredictable. Summer rain showers may persist for the whole day or occur in brief surges. Pack shorts and tank tops for warmer days, and a light pair of trousers and a sweater for the cooler days and evenings.