Squamish weather in September

In September, Squamish sees average daytime highs of 15°C and overnight lows near 7°C, with 150 mm of precipitation across 11.9 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 16°C in the first days to 13°C by the end. The sky is clear or mostly clear about 31% 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 Squamish's 3rd-clearest and 10th-windiest month. For the whole year in context, see Squamish's year-round climate.

Daytime high
15°
3rd warmest
Overnight low
10th coldest
Precipitation
150 mm
11.9 wet days
Daylight
12 h 24 min
5:56 AM – 6:18 PM
Cloud cover
57%
3rd clearest
Wind
4 km/h
10th windiest
Solar energy
3.71 kWh/m²
Travel score
4.3
out of 10
Air quality
Excellent
PM2.5 5 µg/m³ · 2019

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 16°C in the first days to 13°C by the end.

A typical September day in Squamish reaches about 15°C in the afternoon and slips back to 7°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 21°C. Set against its neighbours, September runs about 3°C cooler than August and about 6°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
1179
2179
3169
4169
5168
6168
7168
8168
9168
10168
11168
12168
13158
14158
15157
16157
17157
18157
19157
20147
21147
22147
23146
24146
25146
26136
27136
28136
29136
30135

How September really feels in Squamish

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.

Squamish 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 / -3°38019.3198.40.0
Feb / -3°23515.315.19.80.0
Mar / -2°30819.418.511.50.0
Apr / 19216.513.313.40.6
May11° / 13215.55.415.12.3
Jun14° / 12716.71.2163.4
Jul18° / 8811.2015.75.7
Aug18° / 10°10610.8014.25.9
Sep15° / 15011.90.912.44.3
Oct / 29417.18.510.51.4
Nov / -1°4162017.28.80.0
Dec / -3°37419.519.580.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24852
34852
44852
54951
64852
74951
84852
94852
104852
114753
124753
134654
144555
154555
164555
174555
184456
194456
204456
214555
224555
234456
244555
254654
264654
274654
284555
294555
304357

Chance of precipitation in September

Any precipitationSnow

Squamish gets around 150 mm of rain and snow over 11.9 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 40% and peaks near 42% on the wettest days, and about 1 day brings snow.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
1390
2390
3390
4380
5381
6381
7381
8381
9391
10391
11402
12402
13412
14412
15412
16423
17423
18423
19423
20424
21424
22425
23425
24416
25416
26417
27407
28408
29419
304110

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 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
1991
2991
3991
4991
5991
6991
7991
8991
9991
10991
11991
12991
13991
14991
15991
16991
17991
18991
19991
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000

Wind in September

Winds average 4 km/h in September.

Across September, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

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 5:33 AM to 6:18 AM, and sunset from 6:51 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:336:51
213.25:356:49
313.25:366:47
413.15:386:45
513.15:396:43
613.05:416:40
712.95:426:38
812.95:446:36
912.85:456:34
1012.75:476:31
1112.75:486:29
1212.65:506:27
1312.65:516:25
1412.55:536:22
1512.45:546:20
1612.45:566:18
1712.35:586:16
1812.25:596:13
1912.26:016:11
2012.16:026:09
2112.06:046:07
2212.06:056:04
2311.96:076:02
2411.96:086:00
2511.86:105:57
2611.76:115:55
2711.76:135:53
2811.66:145:51
2911.56:165:48
3011.56:185:46

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.71 kWh/m².

For context, solar energy here swings from a low near 0.79 kWh/m² to a high of 6.04 kWh/m² in July across the year — September's 3.71 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.3Bright
44.3Bright
54.2Bright
64.2Bright
74.1Bright
84.1Bright
94.0Bright
104.0Moderate
113.9Moderate
123.9Moderate
133.8Moderate
143.8Moderate
153.7Moderate
163.6Moderate
173.6Moderate
183.5Moderate
193.5Moderate
203.4Moderate
213.4Moderate
223.3Moderate
233.3Moderate
243.2Moderate
253.2Moderate
263.1Moderate
273.1Moderate
283.0Moderate
293.0Moderate
302.9Moderate
Planning a trip in September

Hazard calendar for Squamish

In seasonPeak

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

Squamish'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 Squamish?

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

4.3
Sightseeing
3rd-best month of the year
0.3
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Squamish for sightseeing.

What to pack for Squamish in September

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

In September, Squamish sees daytime highs around 15°C and nights near 7°C. Worth packing: a warm layer and rain gear. About 12 days see rain.

a warm layerrain gear

Sea temperature near Squamish 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 at the nearest coast (about 39 km away) is warmest in August at about 18°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°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan7Bracing
Feb7Bracing
Mar8Bracing
Apr10Bracing
May13Bracing
Jun15Cool
Jul17Cool
Aug18Cool
Sep15Cool
Oct12Bracing
Nov9Bracing
Dec8Bracing

UV index in Squamish 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 Squamish 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
Mar4Moderate
Apr5Moderate
May7High
Jun6High
Jul8Very high
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Squamish?

Squamish sits at 49.7°N, 123.2°W, 5 m above sea level, in Canada. The nearest listed city is West Vancouver, 41 km away.

Topography around Squamish

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

Within 3 km, the terrain around Squamish has large variations in elevation — a maximum elevation change of 862 m around an average of 138 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,258 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,830 m.

The land around Squamish is covered by trees (66%) within 3 km, trees (79%) within 16 km, and trees (56%) and water (21%) within 80 km.

3 km
862 m
16 km
2,258 m
80 km
2,830 m
treesgrasslandartificial surfacesbare terrainsnow and icewatermoss and lichen
September weather nearby: West Vancouver 41 km · Central Lonsdale 42 km · North Vancouver 43 km · Lower Lonsdale 43 km · West End 46 km · Downtown Vancouver 46 km · Downtown Eastside 47 km · Chinatown 47 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 Squamish (49.6992°, -123.1563°, 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. 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).