Saint-Jean-sur-Richelieu weather in December

In December, Saint-Jean-sur-Richelieu sees average daytime highs of -1°C and overnight lows near -8°C, with 83 mm of precipitation across 12.5 wet days and about 8.6 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 2°C in the first days to -3°C by the end. The sky is clear or mostly clear about 13% of the time in December, and the air most often feels dry.

Daylight stretches from about 8 h 48 min at the start of December to 8 h 36 min by month's end. Set against the rest of the year, December is Saint-Jean-sur-Richelieu's 12th-clearest and 6th-windiest month. For the whole year in context, see Saint-Jean-sur-Richelieu's year-round climate.

Daytime high
-1°
10th warmest
Overnight low
-8°
3rd coldest
Precipitation
83 mm
12.5 wet days
Daylight
8 h 36 min
7:33 AM – 4:06 PM
Cloud cover
75%
12th clearest
Wind
13 km/h
6th windiest
Solar energy
1.23 kWh/m²
Travel score
0.0
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 December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 2°C in the first days to -3°C by the end.

A typical December day in Saint-Jean-sur-Richelieu reaches about -1°C in the afternoon and slips back to -8°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between -8°C and 6°C. Set against its neighbours, December runs about 7°C cooler than November and about 4°C warmer than January.

-20°-10°10°151015202531
Avg high (°C)Avg low (°C)
12-4
22-5
32-5
42-5
51-5
61-6
71-6
81-6
90-7
100-7
110-7
120-7
13-1-8
14-1-8
15-1-8
16-1-8
17-1-8
18-1-8
19-1-9
20-2-9
21-2-9
22-2-9
23-2-9
24-2-9
25-2-9
26-2-10
27-2-10
28-3-10
29-3-10
30-3-10
31-3-10

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

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 31 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
31
28 feel bitter (≤ -10°C)

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

Saint-Jean-sur-Richelieu weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 9th-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 76%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12278
22179
32377
42377
52377
62377
72476
82575
92575
102575
112674
122674
132575
142575
152476
162476
172476
182476
192476
202476
212476
222575
232575
242575
252575
262575
272575
282575
292674
302674
312674

Chance of precipitation in December

Any precipitationSnow

Saint-Jean-sur-Richelieu gets around 83 mm of rain and snow over 12.5 wet days in December. 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 43% on the wettest days, and about 9 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
14323
24324
34224
44125
54125
64026
73926
83927
93827
103828
113828
123829
133829
143830
153830
163830
173930
183930
193931
204031
214031
224132
234132
244232
254232
264333
274333
284333
294333
304333
314334

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in December

Winds average 13 km/h in December.

Across December, 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
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light 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 December

DaylightNight

Daylight runs from about 8 h 48 min at the start of December to 8 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:19 AM to 7:39 AM, and sunset from 4:07 PM to 4:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.87:194:07
28.87:204:06
38.87:214:06
48.77:224:06
58.77:234:06
68.77:244:05
78.77:254:05
88.77:264:05
98.67:274:05
108.67:284:05
118.67:294:05
128.67:304:05
138.67:304:05
148.67:314:06
158.67:324:06
168.67:334:06
178.57:334:06
188.57:344:06
198.57:344:07
208.57:354:07
218.57:354:08
228.57:364:08
238.57:364:09
248.57:374:09
258.57:374:10
268.57:384:10
278.57:384:11
288.67:384:12
298.67:384:12
308.67:394:13
318.67:394:14

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.23 kWh/m² — the year's lowest.

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 — December's 1.23 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
11.3Dim
21.2Dim
31.2Dim
41.2Dim
51.2Dim
61.2Dim
71.2Dim
81.2Dim
91.2Dim
101.2Dim
111.2Dim
121.2Dim
131.2Dim
141.2Dim
151.2Dim
161.2Dim
171.2Dim
181.2Dim
191.2Dim
201.2Dim
211.2Dim
221.2Dim
231.2Dim
241.3Dim
251.3Dim
261.3Dim
271.3Dim
281.3Dim
291.3Dim
301.3Dim
311.3Dim
Planning a trip in December

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

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

0.0
Sightseeing
10th-best month of the year
0.0
Beach & pool
8th-best month of the year

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

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

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

In December, Saint-Jean-sur-Richelieu sees daytime highs around -1°C and nights near -8°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 13 days see rain.

a warm layera heavy coatrain gear

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

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 1. 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
December 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).