Saint-Jean-sur-Richelieu weather in October

In October, Saint-Jean-sur-Richelieu sees average daytime highs of 13°C and overnight lows near 5°C, with 113 mm of precipitation across 12.1 wet days and about 10.7 hours of daylight. It is the 6th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 16°C in the first days to 10°C by the end. The sky is clear or mostly clear about 21% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 30 min at the start of October to 10 hours by month's end. Set against the rest of the year, October is Saint-Jean-sur-Richelieu's 6th-clearest and 7th-windiest month. For the whole year in context, see Saint-Jean-sur-Richelieu's year-round climate.

Daytime high
13°
6th warmest
Overnight low
7th coldest
Precipitation
113 mm
12.1 wet days
Daylight
10 h 42 min
6:17 AM – 4:59 PM
Cloud cover
67%
6th clearest
Wind
13 km/h
7th windiest
Solar energy
2.46 kWh/m²
Travel score
3.5
out of 10

Saint-Jean-sur-Richelieu is city in Mobtérégie, Quebec, Canada.

Air quality
Good
PM2.5 7 µg/m³ · 2019
Density
419/km²
people per km²
Founded
2001

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 16°C in the first days to 10°C by the end.

A typical October day in Saint-Jean-sur-Richelieu reaches about 13°C in the afternoon and slips back to 5°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 19°C. Set against its neighbours, October runs about 8°C cooler than September and about 7°C warmer than November.

10°20°151015202531
Avg high (°C)Avg low (°C)
1178
2178
3167
4167
5167
6167
7156
8156
9156
10156
11146
12146
13145
14145
15135
16135
17135
18134
19124
20124
21124
22124
23113
24113
25113
26113
27103
28102
29102
30102
3192

How October really feels in Saint-Jean-sur-Richelieu

Once humidity and wind are folded in, October averages 0 days that feel above 32°C and 8 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
8
wind chill below the day's low

The story in October is cold — wind chill drags the overnight "feels like" below the raw low.

Saint-Jean-sur-Richelieu weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-4° / -13°7111.29.88.90.0
Feb-3° / -12°609.38.210.10.0
Mar / -6°7511.46.911.60.1
Apr11° / 9911.72.313.22.7
May19° / 104120.114.65.6
Jun24° / 14°11712.8015.46.3
Jul26° / 16°10713.3015.16.2
Aug25° / 15°10812.4013.96.5
Sep21° / 11°9810.7012.36.3
Oct13° / 11312.10.510.73.5
Nov / -1°8612.13.59.30.6
Dec-1° / -8°8312.59.28.60.0

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 17% of October, with mostly cloudy or overcast conditions the remaining 62%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14258
24258
34258
44258
54357
64357
74258
84258
94258
104258
114159
124159
134060
144060
153961
163961
173862
183763
193763
203664
213565
223466
233466
243466
253367
263367
273367
283367
293367
303466
313466

Chance of precipitation in October

Any precipitationSnow

Saint-Jean-sur-Richelieu gets around 113 mm of rain and snow over 12.1 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 39% and peaks near 42% on the wettest days, and about 1 day brings snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1360
2360
3360
4360
5360
6360
7370
8370
9370
10380
11380
12390
13390
14400
15401
16411
17411
18421
19421
20422
21422
22422
23423
24413
25413
26413
27414
28404
29404
30404
31394

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

Most of October feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, October lands in the dry band about 95% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1851041
2851041
386941
489830
590730
691720
792620
892620
994510
1094510
1195410
1295410
1395410
1496310
1596310
1696310
1796310
1896310
1997210
2097210
2197210
2298200
2398200
2498200
2599100
2699100
2799100
2899100
2999100
3099100
3199100

Wind in October

Winds average 13 km/h in October.

Across October, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 30 min at the start of October to 10 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 90 minutes over October. Sunrise moves from 5:57 AM to 6:38 AM, and sunset from 5:27 PM to 4:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.55:575:27
211.45:585:25
311.46:005:23
411.36:015:21
511.36:025:19
611.26:045:17
711.26:055:15
811.16:065:14
911.16:085:12
1011.06:095:10
1111.06:105:08
1210.96:125:06
1310.96:135:04
1410.86:145:03
1510.86:165:01
1610.76:174:59
1710.66:184:57
1810.66:204:56
1910.56:214:54
2010.56:234:52
2110.46:244:51
2210.46:254:49
2310.36:274:47
2410.36:284:46
2510.26:294:44
2610.26:314:43
2710.16:324:41
2810.16:344:40
2910.16:354:38
3010.06:374:37
3110.06:384:35

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 2.46 kWh/m².

For context, solar energy here swings from a low near 1.23 kWh/m² to a high of 5.92 kWh/m² in July across the year — October's 2.46 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.1Moderate
23.1Moderate
33.0Moderate
43.0Moderate
52.9Moderate
62.9Moderate
72.9Moderate
82.8Moderate
92.8Moderate
102.7Moderate
112.7Moderate
122.6Moderate
132.6Moderate
142.6Moderate
152.5Moderate
162.5Moderate
172.4Moderate
182.4Moderate
192.3Moderate
202.3Moderate
212.3Moderate
222.2Moderate
232.2Moderate
242.1Moderate
252.1Moderate
262.0Moderate
272.0Moderate
282.0Dim
291.9Dim
301.9Dim
311.9Dim
Planning a trip in October

Is October a good time to visit Saint-Jean-sur-Richelieu?

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

3.5
Sightseeing
6th-best month of the year
0.2
Beach & pool
6th-best month of the year

October is a weaker month for outdoor sightseeing in Saint-Jean-sur-Richelieu.

What to pack for Saint-Jean-sur-Richelieu in October

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

In October, Saint-Jean-sur-Richelieu sees daytime highs around 13°C and nights near 5°C. Worth packing: a warm layer and rain gear. About 12 days see rain.

a warm layerrain gear

UV index in Saint-Jean-sur-Richelieu in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Saint-Jean-sur-Richelieu peaks around July 13 at about 8 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 13UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul8Very high
Aug3Moderate
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Saint-Jean-sur-Richelieu?

Saint-Jean-sur-Richelieu sits at 45.3°N, 73.3°W, 32 m above sea level, in Canada. The nearest listed city is Chambly, 16 km away.

Topography around Saint-Jean-sur-Richelieu

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Saint-Jean-sur-Richelieu.

Within 3 km, the terrain around Saint-Jean-sur-Richelieu has only modest variations in elevation — a maximum elevation change of 42 m around an average of 36 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 275 m; within 80 km, large variations in elevation — a maximum elevation change of 1,181 m.

The land around Saint-Jean-sur-Richelieu is covered by artificial surfaces (41%) within 3 km, cropland (71%) within 16 km, and trees (47%) and cropland (35%) within 80 km.

3 km
42 m
16 km
275 m
80 km
1,181 m
treesgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Chambly 16 km · Candiac 22 km · La Prairie 22 km · Brossard 22 km · Saint-Hubert 25 km · Saint-Constant 25 km · Saint-Basile-le-Grand 25 km · Greenfield Park 25 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 Saint-Jean-sur-Richelieu (45.3071°, -73.2626°, elevation 32 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).