Baie-Comeau weather in September

In September, Baie-Comeau sees average daytime highs of 14°C and overnight lows near 9°C, with 103 mm of rain across 11.5 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 17°C in the first days to 12°C by the end. The sky is clear or mostly clear about 25% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 18 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Baie-Comeau's 3rd-clearest and 8th-windiest month. For the whole year in context, see Baie-Comeau's year-round climate.

Daytime high
14°
4th warmest
Overnight low
9th coldest
Rainfall
103 mm
11.5 wet days
Daylight
12 h 24 min
5:16 AM – 5:38 PM
Cloud cover
63%
3rd clearest
Wind
13 km/h
8th windiest
Solar energy
3.46 kWh/m²
Travel score
4.0
out of 10

Baie-Comeau is city in Côte-Nord, Quebec, Canada.

Density
50/km²
people per km²
Founded
1982

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 17°C in the first days to 12°C by the end.

A typical September day in Baie-Comeau reaches about 14°C in the afternoon and slips back to 9°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 18°C. Set against its neighbours, September runs about 5°C cooler than August and about 6°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11711
21711
31711
41611
51611
61611
71611
81610
91610
101510
111510
121510
131510
14159
15159
16149
17149
18149
19149
20148
21138
22138
23138
24138
25137
26127
27127
28127
29127
30117

How September really feels in Baie-Comeau

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Baie-Comeau weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-10° / -17°659.910.88.50.0
Feb-8° / -16°568.28.69.80.0
Mar-3° / -10°7210.41011.60.0
Apr / -2°8410.66.613.40.1
May11° / 8512115.12.4
Jun17° / 11°8211.2015.95.1
Jul20° / 14°10413.2015.65.7
Aug19° / 13°9311.9014.25.8
Sep14° / 10311.5012.44.0
Oct / 11012.21.910.51.2
Nov / -3°9511.57.98.90.0
Dec-5° / -12°9011.9128.10.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 57%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24159
34258
44258
54258
64258
74258
84357
94357
104357
114357
124357
134357
144357
154456
164456
174456
184456
194555
204555
214456
224357
234357
244357
254258
264258
274159
284159
293961
303862

Chance of precipitation in September

Any precipitation

Baie-Comeau gets around 103 mm of rain over 11.5 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 39% and peaks near 39% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
138
239
339
439
539
639
739
839
939
1039
1139
1239
1339
1439
1539
1639
1739
1839
1939
2039
2139
2239
2339
2439
2539
2639
2738
2838
2938
3038

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the dry band about 92% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
180173
281163
382153
483143
585132
686122
787112
888102
988102
108992
119181
129181
139271
149361
159361
169451
179451
189640
199640
209730
219730
229730
239730
249820
259820
269820
279910
289910
299910
309910

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
112light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 18 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 108 minutes over September. Sunrise moves from 4:54 AM to 5:37 AM, and sunset from 6:11 PM to 5:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.34:546:11
213.24:556:09
313.24:576:06
413.14:586:04
513.05:006:02
613.05:016:00
712.95:035:58
812.95:045:55
912.85:065:53
1012.75:075:51
1112.75:095:49
1212.65:105:47
1312.55:125:44
1412.55:135:42
1512.45:155:40
1612.45:165:38
1712.35:185:35
1812.25:195:33
1912.25:215:31
2012.15:225:29
2112.05:245:26
2212.05:255:24
2311.95:275:22
2411.95:285:20
2511.85:305:18
2611.75:315:15
2711.75:335:13
2811.65:345:11
2911.55:365:09
3011.55:375:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.46 kWh/m².

For context, solar energy here swings from a low near 1.01 kWh/m² to a high of 5.85 kWh/m² in June across the year — September's 3.46 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.0Bright
34.0Bright
44.0Moderate
53.9Moderate
63.9Moderate
73.8Moderate
83.8Moderate
93.7Moderate
103.7Moderate
113.6Moderate
123.6Moderate
133.5Moderate
143.5Moderate
153.5Moderate
163.4Moderate
173.4Moderate
183.4Moderate
193.3Moderate
203.3Moderate
213.2Moderate
223.2Moderate
233.1Moderate
243.1Moderate
253.0Moderate
263.0Moderate
273.0Moderate
282.9Moderate
292.9Moderate
302.8Moderate
Planning a trip in September

Is September a good time to visit Baie-Comeau?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.0
Sightseeing
4th-best month of the year
0.3
Beach & pool
4th-best month of the year

September is a reasonable time to visit Baie-Comeau for sightseeing.

What to pack for Baie-Comeau in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Baie-Comeau sees daytime highs around 14°C and nights near 9°C. Worth packing: a warm layer and rain gear. About 12 days see rain.

a warm layerrain gear

Sea temperature near Baie-Comeau in September

The nearest coast averages about 10°C in September — 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 13°C and coldest in February near -1°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

0°5°10°15°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan0Bracing
Feb0Bracing
Mar0Bracing
Apr1Bracing
May4Bracing
Jun10Bracing
Jul13Bracing
Aug13Bracing
Sep10Bracing
Oct6Bracing
Nov2Bracing
Dec1Bracing

UV index in Baie-Comeau in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks 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 Baie-Comeau peaks around July 11 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. 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 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 11UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr4Moderate
May5Moderate
Jun6High
Jul6High
Aug2Low
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Baie-Comeau in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Baie-Comeau is worst in June — around 18 µg/m³ PM2.5 (moderate), about 10.1× the cleanest month (December, 2 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 1717 µg/m³Dec 142 µg/m³
PM2.5 (µg/m³)Level
Jan3Good
Feb4Good
Mar7Good
Apr8Good
May8Good
Jun18Moderate
Jul10Good
Aug9Good
Sep6Good
Oct4Good
Nov2Good
Dec2Good
Location & terrain

Where is Baie-Comeau?

Baie-Comeau sits at 49.2°N, 68.1°W, 76 m above sea level, in Canada. The nearest listed city is Rimouski, 90 km away.

Topography around Baie-Comeau

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Baie-Comeau.

Within 3 km, the terrain around Baie-Comeau has only modest variations in elevation — a maximum elevation change of 127 m around an average of 37 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 296 m; within 80 km, significant variations in elevation — a maximum elevation change of 599 m.

The land around Baie-Comeau is covered by water (48%) and trees (35%) within 3 km, water (48%) and trees (43%) within 16 km, and trees (55%) and water (40%) within 80 km.

3 km
127 m
16 km
296 m
80 km
599 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Rimouski 90 km · Sept-Îles 168 km · Rivière-du-Loup 186 km · Edmundston 205 km · Chicoutimi 231 km · Saguenay 231 km · Jonquière 244 km · Alma 266 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
Christian 53%none 35%Muslim 5%Hindu 2%

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 Baie-Comeau (49.2168°, -68.1489°, elevation 76 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).