Deux-Montagnes in Summer
In summer (June, July and August), Deux-Montagnes sees average daytime highs around 24°C and overnight lows near 16°C, with 287 mm of rain over about 36 wet days across the season. It is the warmest season of the year and the 2nd-wettest season.
Over the season highs climb from about 21°C in early June to 23°C by late August. The sky is clear or mostly clear about 27% of the time across summer, and the air most often feels dry.
Summer is Deux-Montagnes's best season of the year to visit on our travel score. For the whole year in context, see Deux-Montagnes's year-round climate.
- Avg daytime high
- 24°C
- warmest season of the year
- Avg overnight low
- 16°C
- Rainfall
- 287 mm
- 36 wet days
- Avg wind
- 11 km/h
- Travel score
- 6.5
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Deux-Montagnes in Summer
Over the season highs climb from about 21°C in early June to 23°C by late August.
A typical summer day in Deux-Montagnes reaches about 24°C and drops to 16°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Deux-Montagnes
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Deux-Montagnes weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -5° / -14° | 75 | 10.5 | 9.4 | 8.9 | 0.0 |
| Feb | -4° / -13° | 61 | 8.9 | 8.2 | 10.1 | 0.0 |
| Mar | 2° / -6° | 74 | 10.2 | 6.7 | 11.6 | 0.0 |
| Apr | 10° / 2° | 103 | 11.7 | 2.8 | 13.2 | 2.1 |
| May | 18° / 9° | 95 | 11.5 | 0.1 | 14.7 | 5.3 |
| Jun | 23° / 14° | 103 | 11.9 | 0 | 15.4 | 6.4 |
| Jul | 26° / 17° | 91 | 12.5 | 0 | 15.1 | 6.4 |
| Aug | 25° / 16° | 93 | 11.3 | 0 | 13.9 | 6.8 |
| Sep | 20° / 12° | 93 | 10.3 | 0 | 12.3 | 6.3 |
| Oct | 13° / 5° | 108 | 11.6 | 0.6 | 10.7 | 3.3 |
| Nov | 5° / -1° | 87 | 11.6 | 3.7 | 9.3 | 0.5 |
| Dec | -2° / -8° | 86 | 11.5 | 9.2 | 8.6 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 27% of the time across summer.
Chance of precipitation in Summer
Deux-Montagnes gets around 287 mm of rain over 36 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 11 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 15 h 12 min in early June to 13 h 12 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.6 kWh/m².
Is summer a good time to visit Deux-Montagnes?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Deux-Montagnes for sightseeing.
What to pack for Deux-Montagnes in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Deux-Montagnes sees daytime highs around 24°C and nights near 16°C. Worth packing: light clothes, rain gear and sun protection. About 36 days see rain.
UV index in Deux-Montagnes in Summer
Clear-sky midday UV across summer averages around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Deux-Montagnes peaks around July 13 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 10 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 4 | 4 | 6 | 6 | 8 | 4 | 5 | 3 | 2 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | Very high | Moderate | High | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 4 | Moderate |
| Apr | 4 | Moderate |
| May | 6 | High |
| Jun | 6 | High |
| Jul | 8 | Very high |
| Aug | 4 | Moderate |
| Sep | 5 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Where is Deux-Montagnes?
Deux-Montagnes sits at 45.5°N, 73.9°W, 29 m above sea level, in Canada. The nearest listed city is Saint-Eustache, 3.0 km away.
Topography around Deux-Montagnes
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Deux-Montagnes.
Within 3 km, the terrain around Deux-Montagnes has only modest variations in elevation — a maximum elevation change of 44 m around an average of 29 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 258 m; within 80 km, large variations in elevation — a maximum elevation change of 867 m.
The land around Deux-Montagnes is covered by trees (35%), artificial surfaces (27%) and water (26%) within 3 km, trees (34%) and artificial surfaces (23%) within 16 km, and trees (48%) and cropland (35%) within 80 km.
Canada travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 83% of US
- price level, 2025
- GDP per capita
- $55,698
- 2025
- Happiness
- 6.7 / 10
- World Happiness, 2025
- Safe drinking water
- 97%
- of population, 2024
- Homicide rate
- 2
- per 100k, 2023
- Road deaths
- 5.3
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Deux-Montagnes (45.5346°, -73.9017°, elevation 29 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.