Courtenay weather in September

In September, Courtenay sees average daytime highs of 18°C and overnight lows near 12°C, with 111 mm of rain across 10.6 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 19°C in the first days to 16°C by the end. The sky is clear or mostly clear about 39% 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 Courtenay's 3rd-clearest and 11th-windiest month. For the whole year in context, see Courtenay's year-round climate.

Daytime high
18°
4th warmest
Overnight low
12°
10th coldest
Rainfall
111 mm
10.6 wet days
Daylight
12 h 24 min
6:03 AM – 6:25 PM
Cloud cover
51%
3rd clearest
Wind
7 km/h
11th windiest
Solar energy
3.7 kWh/m²
Travel score
5.6
out of 10

Courtenay is city in British Columbia, Canada.

Air quality
Good
PM2.5 8 µg/m³ · 2019
Density
877/km²
people per km²
Founded
1969

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 19°C in the first days to 16°C by the end.

A typical September day in Courtenay reaches about 18°C in the afternoon and slips back to 12°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 22°C. Set against its neighbours, September runs about 4°C cooler than August and about 5°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11914
21913
31913
41913
51913
61913
71913
81913
91913
101813
111813
121813
131813
141812
151812
161812
171712
181712
191712
201712
211712
221712
231711
241611
251611
261611
271611
281611
291511
301510

How September really feels in Courtenay

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.

Courtenay weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 29919.86.58.40.1
Feb / 17915.25.29.80.5
Mar / 20517.94.811.51.1
Apr11° / 13415.10.613.42.4
May15° / 8211.1015.14.6
Jun18° / 12°7411.30165.6
Jul21° / 14°477.8015.77.0
Aug21° / 15°678.2014.27.0
Sep18° / 12°11110.6012.45.6
Oct12° / 23918.30.110.52.7
Nov / 32620.33.28.80.9
Dec / 30220.36.980.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 47%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15644
25644
35644
45743
55743
65743
75743
85743
95644
105644
115545
125446
135446
145248
155248
165248
175149
184951
194951
204951
214951
225050
235050
244951
255149
265050
275149
285050
295050
304951

Chance of precipitation in September

Any precipitation

Courtenay gets around 111 mm of rain over 10.6 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 36% and peaks near 42% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
133
233
333
433
533
633
733
833
934
1034
1135
1235
1336
1436
1537
1637
1737
1838
1938
2038
2138
2238
2338
2438
2539
2639
2739
2840
2941
3042

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 77% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
162362
263352
364342
465332
566322
667312
768302
869292
970282
1071272
1172262
1273252
1373252
1474242
1575232
1677221
1778211
1879201
1980191
2081181
2182171
2284151
2386140
2487130
2588120
2689110
2790100
289190
299190
309280

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 5:41 AM to 6:25 AM, and sunset from 6:59 PM to 5:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:416:59
213.25:426:57
313.25:446:54
413.15:456:52
513.15:476:50
613.05:486:48
712.95:506:46
812.95:516:43
912.85:536:41
1012.75:546:39
1112.75:566:37
1212.65:576:34
1312.65:596:32
1412.56:006:30
1512.46:026:27
1612.46:036:25
1712.36:056:23
1812.26:066:21
1912.26:086:18
2012.16:096:16
2112.06:116:14
2212.06:136:12
2311.96:146:09
2411.96:166:07
2511.86:176:05
2611.76:196:03
2711.76:206:00
2811.66:225:58
2911.56:235:56
3011.56:255:54

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.7 kWh/m².

For context, solar energy here swings from a low near 0.66 kWh/m² to a high of 6.08 kWh/m² in July across the year — September's 3.7 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.3Bright
34.3Bright
44.3Bright
54.2Bright
64.2Bright
74.1Bright
84.1Bright
94.0Bright
104.0Moderate
113.9Moderate
123.9Moderate
133.8Moderate
143.7Moderate
153.7Moderate
163.6Moderate
173.6Moderate
183.5Moderate
193.5Moderate
203.4Moderate
213.4Moderate
223.3Moderate
233.3Moderate
243.2Moderate
253.2Moderate
263.1Moderate
273.0Moderate
283.0Moderate
292.9Moderate
302.9Moderate
Planning a trip in September

Hazard calendar for Courtenay

In seasonPeak

None of Courtenay's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Courtenay's rainy season runs October–March, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Courtenay?

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

5.6
Sightseeing
3rd-best month of the year
1.7
Beach & pool
4th-best month of the year

September is a reasonable time to visit Courtenay for sightseeing.

What to pack for Courtenay in September

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

In September, Courtenay sees daytime highs around 18°C and nights near 12°C. Worth packing: rain gear. About 11 days see rain.

rain gear

Sea temperature near Courtenay in September

The nearest coast averages about 15°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 17°C and coldest in January near 7°C.

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

5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan7Bracing
Feb7Bracing
Mar8Bracing
Apr10Bracing
May13Bracing
Jun15Cool
Jul17Cool
Aug17Cool
Sep15Bracing
Oct12Bracing
Nov9Bracing
Dec8Bracing

UV index in Courtenay 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 Courtenay peaks around July 18 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 18 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighModerateLowJul 18UV 7Dec 18UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May7High
Jun6High
Jul8Very high
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Courtenay?

Courtenay sits at 49.7°N, 125.0°W, 13 m above sea level, in Canada. The nearest listed city is Campbell River, 41 km away.

Topography around Courtenay

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

Within 3 km, the terrain around Courtenay has only modest variations in elevation — a maximum elevation change of 108 m around an average of 32 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,243 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,075 m.

The land around Courtenay is covered by trees (52%) and grassland (22%) within 3 km, trees (52%) and water (34%) within 16 km, and trees (68%) and water (26%) within 80 km.

3 km
108 m
16 km
1,243 m
80 km
2,075 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Campbell River 41 km · Port Alberni 51 km · Tofino 89 km · Nanaimo 96 km · Harewood 97 km · Squamish 132 km · North Cowichan 134 km · University Endowment Lands 135 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 Courtenay (49.6866°, -124.9936°, elevation 13 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).