Port Coquitlam weather in September

In September, Port Coquitlam sees average daytime highs of 19°C and overnight lows near 10°C, with 142 mm of rain across 11.2 wet days and about 12.4 hours of daylight. It is the 3rd-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 17°C by the end. The sky is clear or mostly clear about 35% 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 Port Coquitlam's 3rd-clearest and 11th-windiest month. For the whole year in context, see Port Coquitlam's year-round climate.

Daytime high
19°
3rd warmest
Overnight low
10°
10th coldest
Rainfall
142 mm
11.2 wet days
Daylight
12 h 24 min
5:55 AM – 6:16 PM
Cloud cover
53%
3rd clearest
Wind
5 km/h
11th windiest
Solar energy
3.8 kWh/m²
Travel score
5.9
out of 10

Port Coquitlam is city in British Columbia, Canada.

Density
1,988/km²
people per km²

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 21°C in the first days to 17°C by the end.

A typical September day in Port Coquitlam reaches about 19°C in the afternoon and slips back to 10°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 25°C. Set against its neighbours, September runs about 3°C cooler than August and about 6°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12111
22111
32111
42111
52011
62011
72011
82011
92011
102011
112011
122010
131910
141910
151910
161910
171910
181910
191910
201810
211810
22189
23189
24189
25189
26179
27179
28179
29179
30178

How September really feels in Port Coquitlam

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.

Port Coquitlam weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 34319.68.48.50.1
Feb / 20915.779.80.6
Mar / 28119.97.411.61.4
Apr13° / 19817.41.813.42.8
May17° / 13413.20.315.14.8
Jun19° / 10°10812.5015.95.6
Jul22° / 12°607.8015.67.2
Aug22° / 12°848.1014.27.2
Sep19° / 10°14211.2012.45.9
Oct13° / 27116.80.210.53.1
Nov / 38020.34.98.90.9
Dec / 32919.510.28.10.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 49%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15446
25545
35545
45545
55644
65644
75545
85545
95446
105347
115347
125248
135149
145149
155050
165050
175050
184951
194951
205050
214951
224951
234951
244951
255050
265050
275050
284951
294951
304852

Chance of precipitation in September

Any precipitation

Port Coquitlam gets around 142 mm of rain over 11.2 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 38% and peaks near 40% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
135
235
335
435
535
635
736
836
936
1037
1138
1238
1339
1439
1539
1639
1739
1840
1940
2040
2140
2240
2339
2439
2539
2639
2739
2839
2939
3040

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 84% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
17525
27525
37624
47723
57723
67822
77921
87921
98020
108020
118119
128119
138218
148317
158317
168416
178515
188614
198713
208812
218812
228911
239010
24919
25928
26937
27946
28955
29964
30964

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

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 5:32 AM to 6:16 AM, and sunset from 6:49 PM to 5:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:326:49
213.25:346:47
313.25:356:45
413.15:376:43
513.05:386:41
613.05:406:38
712.95:416:36
812.95:436:34
912.85:446:32
1012.75:466:30
1112.75:476:27
1212.65:496:25
1312.55:506:23
1412.55:526:21
1512.45:536:18
1612.45:556:16
1712.35:566:14
1812.25:586:12
1912.25:596:09
2012.16:016:07
2112.06:026:05
2212.06:046:03
2311.96:056:00
2411.96:075:58
2511.86:085:56
2611.76:105:54
2711.76:115:52
2811.66:135:49
2911.56:145:47
3011.56:165:45

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.8 kWh/m².

For context, solar energy here swings from a low near 0.76 kWh/m² to a high of 6.14 kWh/m² in July across the year — September's 3.8 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.4Bright
44.4Bright
54.3Bright
64.3Bright
74.2Bright
84.2Bright
94.1Bright
104.1Bright
114.0Bright
124.0Moderate
133.9Moderate
143.9Moderate
153.8Moderate
163.7Moderate
173.7Moderate
183.6Moderate
193.6Moderate
203.5Moderate
213.5Moderate
223.4Moderate
233.4Moderate
243.3Moderate
253.3Moderate
263.2Moderate
273.1Moderate
283.1Moderate
293.0Moderate
303.0Moderate
Planning a trip in September

Hazard calendar for Port Coquitlam

In seasonPeak

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

Port Coquitlam's rainy season runs October–April, 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 Port Coquitlam?

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

5.9
Sightseeing
3rd-best month of the year
2.5
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Port Coquitlam for sightseeing.

What to pack for Port Coquitlam in September

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

In September, Port Coquitlam sees daytime highs around 19°C and nights near 10°C. Worth packing: rain gear. About 11 days see rain.

rain gear

Sea temperature near Port Coquitlam 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 30 km away) is warmest in August at about 16°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°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan7Bracing
Feb7Bracing
Mar8Bracing
Apr10Bracing
May12Bracing
Jun14Bracing
Jul16Cool
Aug16Cool
Sep14Bracing
Oct11Bracing
Nov9Bracing
Dec8Bracing

UV index in Port Coquitlam 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 Port Coquitlam peaks around July 17 at about 8 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 17UV 8Dec 18UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May7High
Jun6High
Jul8Very high
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Port Coquitlam 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 Port Coquitlam is worst in August — around 18 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodAug 1517 µg/m³Dec 119 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb13Moderate
Mar16Moderate
Apr16Moderate
May17Moderate
Jun15Moderate
Jul15Moderate
Aug18Moderate
Sep14Moderate
Oct13Moderate
Nov9Good
Dec9Good
Location & terrain

Where is Port Coquitlam?

Port Coquitlam sits at 49.3°N, 122.8°W, 16 m above sea level, in Canada. The nearest listed city is Coquitlam, 2.0 km away.

Topography around Port Coquitlam

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

Within 3 km, the terrain around Port Coquitlam has only modest variations in elevation — a maximum elevation change of 170 m around an average of 25 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,542 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,632 m.

The land around Port Coquitlam is covered by artificial surfaces (48%) and trees (41%) within 3 km, trees (55%) within 16 km, and trees (54%) and water (28%) within 80 km.

3 km
170 m
16 km
1,542 m
80 km
2,632 m
treesgrasslandcroplandartificial surfacesbare terrainsnow and icewater
September weather nearby: Coquitlam 2.0 km · Coquitlam Town Centre 2.0 km · Port Moody 4.0 km · Westwood Plateau 5.0 km · Central Coquitlam 5.0 km · Fraser Heights 7.0 km · Pitt Meadows 8.0 km · Maillardville 8.0 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 Port Coquitlam (49.2664°, -122.7693°, elevation 16 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).