Chambly weather in September

In September, Chambly sees average daytime highs of 21°C and overnight lows near 11°C, with 98 mm of rain across 10.3 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 18°C by the end. The sky is clear or mostly clear about 30% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 06 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Chambly's 2nd-clearest and 9th-windiest month. For the whole year in context, see Chambly's year-round climate.

Daytime high
21°
4th warmest
Overnight low
11°
9th coldest
Rainfall
98 mm
10.3 wet days
Daylight
12 h 18 min
5:38 AM – 5:57 PM
Cloud cover
58%
2nd clearest
Wind
12 km/h
9th windiest
Solar energy
3.88 kWh/m²
Travel score
6.3
out of 10

Chambly is city in Quebec, Canada.

Density
819/km²
people per km²
Founded
1965

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 23°C in the first days to 18°C by the end.

A typical September day in Chambly reaches about 21°C in the afternoon and slips back to 11°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 26°C. Set against its neighbours, September runs about 4°C cooler than August and about 8°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12313
22313
32313
42313
52313
62312
72212
82212
92212
102212
112212
122111
132111
142111
152111
162111
172010
182010
192010
202010
212010
22199
23199
24199
25199
26189
27188
28188
29178
30178

How September really feels in Chambly

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.

Chambly weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-5° / -13°7410.99.78.90.0
Feb-3° / -13°619.38.210.10.0
Mar / -6°7510.77.111.60.1
Apr11° / 10111.72.413.22.7
May19° / 10211.9014.75.6
Jun24° / 14°11012.4015.46.3
Jul26° / 16°10113.1015.16.2
Aug25° / 15°10511.9013.96.6
Sep21° / 11°9810.3012.36.3
Oct13° / 11311.80.610.73.5
Nov / -2°87123.59.30.5
Dec-1° / -9°86129.38.60.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% 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 51%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15347
25248
35248
45248
55248
65149
75149
85248
95149
105149
115050
125050
135050
145050
155050
165050
175050
184951
194852
204852
214852
224753
234654
244654
254654
264555
274555
284456
294357
304357

Chance of precipitation in September

Any precipitation

Chambly gets around 98 mm of rain over 10.3 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 35% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
134
234
334
434
534
634
735
835
935
1035
1135
1235
1334
1434
1534
1634
1734
1834
1934
2034
2134
2235
2335
2435
2535
2635
2735
2836
2936
3036

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 63% of days. Sticky, muggy-or-worse air turns up on roughly 5% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1432718111
2442717101
3462717101
4472716101
549261591
650261591
752261480
853251480
954251470
1056241370
1157241360
1258231360
1359231350
1461221250
1562211250
1664201240
1765201140
1866191140
1968181130
2069181030
2170171030
227216930
237315930
247515820
257614820
267813720
278012620
288012620
298311510
308410510

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 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 06 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 96 minutes over September. Sunrise moves from 5:19 AM to 5:56 AM, and sunset from 6:26 PM to 5:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:196:26
213.15:206:25
313.05:226:23
413.05:236:21
512.95:246:19
612.95:256:17
712.85:276:15
812.75:286:13
912.75:296:11
1012.65:306:09
1112.65:326:07
1212.55:336:05
1312.55:346:03
1412.45:366:01
1512.45:375:59
1612.35:385:57
1712.35:395:55
1812.25:415:53
1912.25:425:51
2012.15:435:49
2112.05:445:47
2212.05:465:45
2311.95:475:43
2411.95:485:41
2511.85:495:39
2611.85:515:37
2711.75:525:35
2811.75:535:33
2911.65:555:31
3011.55:565:29

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.88 kWh/m².

For context, solar energy here swings from a low near 1.25 kWh/m² to a high of 5.91 kWh/m² in June across the year — September's 3.88 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.5Bright
34.5Bright
44.4Bright
54.4Bright
64.3Bright
74.3Bright
84.2Bright
94.2Bright
104.1Bright
114.1Bright
124.0Bright
134.0Bright
144.0Moderate
153.9Moderate
163.9Moderate
173.8Moderate
183.8Moderate
193.7Moderate
203.7Moderate
213.6Moderate
223.6Moderate
233.5Moderate
243.5Moderate
253.4Moderate
263.3Moderate
273.3Moderate
283.2Moderate
293.2Moderate
303.1Moderate
Planning a trip in September

Is September a good time to visit Chambly?

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

6.3
Sightseeing
2nd-best month of the year
3.6
Beach & pool
4th-best month of the year

September is a reasonable time to visit Chambly for sightseeing.

What to pack for Chambly in September

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

In September, Chambly sees daytime highs around 21°C and nights near 11°C. Worth packing: rain gear. About 10 days see rain.

rain gear

UV index in Chambly in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Chambly peaks around July 13 at about 7 (very 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 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 13UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul8Very high
Aug3Moderate
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Chambly?

Chambly sits at 45.5°N, 73.3°W, 4 m above sea level, in Canada. The nearest listed city is Saint-Basile-le-Grand, 9.0 km away.

Topography around Chambly

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

Within 3 km, the terrain around Chambly has only modest variations in elevation — a maximum elevation change of 45 m around an average of 18 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 413 m; within 80 km, large variations in elevation — a maximum elevation change of 1,065 m.

The land around Chambly is covered by trees (31%) and cropland (20%) within 3 km, cropland (49%) and trees (26%) within 16 km, and trees (44%) and cropland (38%) within 80 km.

3 km
45 m
16 km
413 m
80 km
1,065 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Saint-Basile-le-Grand 9.0 km · Saint-Bruno-de-Montarville 11 km · Saint-Hubert 12 km · Brossard 14 km · Beloeil 14 km · Greenfield Park 15 km · Mont-Saint-Hilaire 15 km · Sainte-Julie 15 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 Chambly (45.4501°, -73.2825°, elevation 4 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. 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).