Corner Brook weather in September

In September, Corner Brook sees average daytime highs of 16°C and overnight lows near 9°C, with 120 mm of precipitation across 14 wet days and about 12.4 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 17°C in the first days to 14°C by the end. The sky is clear or mostly clear about 20% 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 Corner Brook's 4th-clearest and 8th-windiest month. For the whole year in context, see Corner Brook's year-round climate.

Daytime high
16°
3rd warmest
Overnight low
10th coldest
Precipitation
120 mm
14 wet days
Daylight
12 h 24 min
6:05 AM – 6:27 PM
Cloud cover
70%
4th clearest
Wind
12 km/h
8th windiest
Solar energy
3.15 kWh/m²
Travel score
4.2
out of 10

Corner Brook is city in Newfoundland and Labrador, Canada.

Air quality
Good
PM2.5 6 µg/m³ · 2019
Density
130/km²
people per km²
Founded
1956

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 14°C by the end.

A typical September day in Corner Brook reaches about 16°C in the afternoon and slips back to 9°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 20°C. Set against its neighbours, September runs about 4°C cooler than August and about 6°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11811
21811
31711
41711
51711
61710
71710
81710
91610
101610
111610
121610
131610
14169
15169
16159
17159
18159
19159
20159
21158
22158
23148
24148
25148
26148
27148
28147
29137
30137

How September really feels in Corner Brook

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.

Corner Brook weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-5° / -11°1151820.68.50.0
Feb-5° / -12°10114.617.39.80.0
Mar-1° / -8°9613.913.911.60.0
Apr / -3°85138.913.40.2
May10° / 8413.12.9152.0
Jun15° / 8612.20.115.94.1
Jul19° / 11°10413.8015.65.4
Aug19° / 13°12114.6014.25.5
Sep16° / 120140.112.44.2
Oct10° / 12816.32.310.51.8
Nov / -0°12817.8118.90.1
Dec-1° / -6°12618.818.68.10.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13664
23565
33565
43565
53565
63565
73565
83466
93466
103466
113466
123367
133268
143268
153268
163268
173268
183268
193169
203169
213268
223268
233169
243169
253268
263268
273169
283169
293268
303169

Chance of precipitation in September

Any precipitation

Corner Brook gets around 120 mm of rain and snow over 14 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 47% and peaks near 49% on the wettest days, and about 0 day brings snow.

0%20%40%60%151015202530
Rain chance (%)
149
248
348
448
548
648
748
847
947
1047
1147
1247
1347
1447
1547
1647
1747
1847
1947
2047
2147
2247
2347
2447
2547
2647
2747
2848
2948
3048

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 83% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
169238
270228
372217
473207
575196
675196
777185
877185
979174
1079174
1180164
1282153
1382153
1483143
1583143
1684133
1785132
1886122
1986122
2087112
2187112
2288102
2388102
248992
258992
269082
279082
289172
299262
309361

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light 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 5:43 AM to 6:26 AM, and sunset from 7:00 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:437:00
213.25:456:57
313.15:466:55
413.15:486:53
513.05:496:51
613.05:516:49
712.95:526:47
812.85:546:44
912.85:556:42
1012.75:576:40
1112.75:586:38
1212.66:006:36
1312.56:016:33
1412.56:036:31
1512.46:046:29
1612.46:056:27
1712.36:076:25
1812.26:086:22
1912.26:106:20
2012.16:116:18
2112.06:136:16
2212.06:146:13
2311.96:166:11
2411.96:176:09
2511.86:196:07
2611.76:206:05
2711.76:226:02
2811.66:236:00
2911.66:255:58
3011.56:265:56

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.15 kWh/m².

For context, solar energy here swings from a low near 0.72 kWh/m² to a high of 5.32 kWh/m² in June across the year — September's 3.15 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.6Moderate
33.6Moderate
43.6Moderate
53.5Moderate
63.5Moderate
73.5Moderate
83.4Moderate
93.4Moderate
103.3Moderate
113.3Moderate
123.3Moderate
133.2Moderate
143.2Moderate
153.1Moderate
163.1Moderate
173.1Moderate
183.0Moderate
193.0Moderate
203.0Moderate
212.9Moderate
222.9Moderate
232.9Moderate
242.8Moderate
252.8Moderate
262.7Moderate
272.7Moderate
282.7Moderate
292.6Moderate
302.6Moderate
Planning a trip in September

Is September a good time to visit Corner Brook?

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

4.2
Sightseeing
3rd-best month of the year
0.5
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Corner Brook for sightseeing.

What to pack for Corner Brook in September

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

In September, Corner Brook sees daytime highs around 16°C and nights near 9°C. Pack rain gear. Worth having: a warm layer. About 14 days see rain.

rain geara warm layer

Sea temperature near Corner Brook in September

The nearest coast averages about 14°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 36 km away) is warmest in August at about 16°C and coldest in March near -0°C.

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

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan1Bracing
Feb0Bracing
Mar0Bracing
Apr1Bracing
May3Bracing
Jun8Bracing
Jul13Bracing
Aug16Cool
Sep14Bracing
Oct9Bracing
Nov6Bracing
Dec3Bracing

UV index in Corner Brook 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 Corner Brook peaks around June 17 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 17UV 7Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5Moderate
May6High
Jun7Very high
Jul7High
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Corner Brook?

Corner Brook sits at 49.0°N, 58.0°W, 17 m above sea level, in Canada. The nearest listed city is Saint-Pierre, 275 km away.

Saint-PierreGlace BaySydneyConception Bay SouthParadiseMount PearlSt. John'sCharlottetown

Topography around Corner Brook

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Corner Brook.

Within 3 km, the terrain around Corner Brook has significant variations in elevation — a maximum elevation change of 347 m around an average of 99 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 657 m; within 80 km, large variations in elevation — a maximum elevation change of 809 m.

The land around Corner Brook is covered by trees (47%) and water (27%) within 3 km, trees (67%) and grassland (21%) within 16 km, and trees (44%), water (30%) and grassland (24%) within 80 km.

3 km
347 m
16 km
657 m
80 km
809 m
treesgrasslandartificial surfacesbare terrainwaterwetlandmoss and lichen
September weather nearby: Saint-Pierre 275 km · Glace Bay 341 km · Sydney 355 km · Conception Bay South 401 km · Paradise 407 km · Mount Pearl 415 km · St. John's 417 km · Charlottetown 491 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 Corner Brook (48.95°, -57.952°, elevation 17 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).