Sept-Îles in Summer
In summer (June, July and August), Sept-Îles sees average daytime highs around 20°C and overnight lows near 11°C, with 275 mm of rain over about 38 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 15°C in early June to 18°C by late August. The sky is clear or mostly clear about 19% of the time across summer, and the air most often feels dry.
Summer is Sept-Îles's best season of the year to visit on our travel score. For the whole year in context, see Sept-Îles's year-round climate.
- Avg daytime high
- 20°C
- warmest season of the year
- Avg overnight low
- 11°C
- Rainfall
- 275 mm
- 38 wet days
- Avg wind
- 11 km/h
- Travel score
- 5.7
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Sept-Îles in Summer
Over the season highs climb from about 15°C in early June to 18°C by late August.
A typical summer day in Sept-Îles reaches about 20°C and drops to 11°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Sept-Îles
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.
Sept-Îles 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 | -10° / -19° | 69 | 10.4 | 11.1 | 8.3 | 0.0 |
| Feb | -8° / -18° | 54 | 8.7 | 9.3 | 9.7 | 0.0 |
| Mar | -2° / -11° | 75 | 10.3 | 10.2 | 11.5 | 0.0 |
| Apr | 4° / -4° | 82 | 10.6 | 7.8 | 13.5 | 0.2 |
| May | 12° / 2° | 85 | 11.4 | 1.9 | 15.2 | 2.8 |
| Jun | 18° / 9° | 81 | 11.6 | 0 | 16.1 | 5.4 |
| Jul | 21° / 12° | 102 | 13.5 | 0 | 15.7 | 5.8 |
| Aug | 20° / 11° | 93 | 12.4 | 0 | 14.3 | 5.9 |
| Sep | 15° / 7° | 103 | 12.2 | 0.1 | 12.4 | 4.3 |
| Oct | 8° / 1° | 113 | 12.4 | 2.8 | 10.5 | 1.3 |
| Nov | 1° / -6° | 103 | 12.2 | 8.6 | 8.8 | 0.0 |
| Dec | -6° / -14° | 95 | 11.6 | 12 | 7.9 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 19% of the time across summer.
Chance of precipitation in Summer
Sept-Îles gets around 275 mm of rain over 38 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 48 min in early June to 13 h 24 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 5.2 kWh/m².
Is summer a good time to visit Sept-Îles?
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 Sept-Îles for sightseeing.
What to pack for Sept-Îles in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Sept-Îles sees daytime highs around 20°C and nights near 11°C. Worth packing: rain gear and sun protection. About 38 days see rain.
Sea temperature near Sept-Îles in Summer
The nearest coast averages about 13°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in August at about 14°C and coldest in February near -1°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 0 | 0 | 0 | 1 | 5 | 10 | 14 | 14 | 11 | 7 | 4 | 1 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 0 | Bracing |
| Feb | 0 | Bracing |
| Mar | 0 | Bracing |
| Apr | 1 | Bracing |
| May | 5 | Bracing |
| Jun | 10 | Bracing |
| Jul | 14 | Bracing |
| Aug | 14 | Bracing |
| Sep | 11 | Bracing |
| Oct | 7 | Bracing |
| Nov | 4 | Bracing |
| Dec | 1 | Bracing |
UV index in Sept-Îles in Summer
Clear-sky midday UV across summer averages around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Sept-Îles peaks around July 9 at about 6 (high) — a little sun protection helps at midday. It bottoms out near January 1 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 5 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 3 | 4 | 5 | 6 | 6 | 2 | 4 | 2 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | Moderate | High | High | Low | Moderate | Low | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 3 | Moderate |
| Apr | 4 | Moderate |
| May | 5 | Moderate |
| Jun | 6 | High |
| Jul | 6 | High |
| Aug | 2 | Low |
| Sep | 4 | Moderate |
| Oct | 2 | Low |
| Nov | 1 | Low |
| Dec | 1 | Low |
Air quality in Sept-Îles in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Sept-Îles is worst in June — around 24 µg/m³ PM2.5 (moderate), about 15.2× the cleanest month (December, 2 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 2 | 4 | 7 | 7 | 10 | 24 | 9 | 9 | 6 | 3 | 2 | 2 |
| Level | Good | Good | Good | Good | Good | Moderate | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 2 | Good |
| Feb | 4 | Good |
| Mar | 7 | Good |
| Apr | 7 | Good |
| May | 10 | Good |
| Jun | 24 | Moderate |
| Jul | 9 | Good |
| Aug | 9 | Good |
| Sep | 6 | Good |
| Oct | 3 | Good |
| Nov | 2 | Good |
| Dec | 2 | Good |
Where is Sept-Îles?
Sept-Îles sits at 50.2°N, 66.4°W, 5 m above sea level, in Canada. The nearest listed city is Baie-Comeau, 168 km away.
Topography around Sept-Îles
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sept-Îles.
Within 3 km, the terrain around Sept-Îles has only modest variations in elevation — a maximum elevation change of 42 m around an average of 6 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 370 m; within 80 km, large variations in elevation — a maximum elevation change of 1,000 m.
The land around Sept-Îles is covered by water (54%) and artificial surfaces (22%) within 3 km, water (52%) and trees (38%) within 16 km, and trees (64%) and water (33%) 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 Sept-Îles (50.2001°, -66.3821°, elevation 5 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.