AI-generatedSaint-Jean-sur-Richelieu at a glance
- Best time
- May – Sep
- Warmest month
- Jul · 28°
- Sunshine a year
- 1,970 h
- Rain a year
- 1,136 mm
- Climate
- Continental
- Time zone
- UTC−5 / UTC−4
- Elevation
- 32 m
Climate in Saint-Jean-sur-Richelieu
Saint-Jean-sur-Richelieu has warm to hot summers and cold winters with occasional snow. July is the warmest month with average highs of 28 °C, while January is the coolest at −4 °C. With around 1,970 hours of sunshine a year, Saint-Jean-sur-Richelieu is moderately sunny; July is the sunniest month with 8.0 hours a day.
Holiday weather through the year
Best time to visit Saint-Jean-sur-Richelieu
The best time to visit Saint-Jean-sur-Richelieu is from May to September. For sightseeing, day trips and hiking, conditions are most comfortable in September. Rain is frequent from November to December; the wettest month is June with 122 mm.
Saint-Jean-sur-Richelieu through the seasons
How the weather changes over the seasons, with averages for each.
Saint-Jean-sur-Richelieu in spring
Mar – May
Fair
- 4–21 °C by day
- 6.1 h of sun a day
- 36 rainy days in all
Saint-Jean-sur-Richelieu in summer
Jun – Aug
Good
- 25–28 °C by day
- 7.6 h of sun a day
- 39 rainy days in all
Saint-Jean-sur-Richelieu in autumn
Sep – Nov
Fair
- 7–22 °C by day
- 4.5 h of sun a day
- 34 rainy days in all
Saint-Jean-sur-Richelieu in winter
Dec – Feb
Poor
- −3–0 °C by day
- 3.5 h of sun a day
- 34 rainy days in all
Which month for what?
Beach & swimming
No sea nearby
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Sep
15–28 °C and not too much rain
Rainy months
Nov – Dec
Rainy season or more than 12 rainy days
Snow
Nov – Mar
Snow on 2 or more days
Find your perfect month
Tell us what you like and we rate every month in Saint-Jean-sur-Richelieu for you.
Your best months: May – June, September
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Fair
Best time to visit: May – September
A typical day in October
- Morning, 08:00: about 7°
- Midday, 13:00: about 14°
- Afternoon, 16:00: about 14°
- Evening, 20:00: about 10°
- Night, 23:00: about 8°
07:0718:10
Cold evenings: bring a warm jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 06:49–07:48 · evening 17:30–18:28
- Blue hour
- Morning 06:38–06:49 · evening 18:28–18:40
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
October in Saint-Jean-sur-Richelieu compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 18° at the start of the month to 11° at the end. The days get 1.5 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 18° | 11° |
| Night-time low | 8° | 2° |
| Daylight | 11.8 h | 10.3 h |
What is the weather like in Saint-Jean-sur-Richelieu in October?
In October, Saint-Jean-sur-Richelieu is cool: daytime highs average 15 °C, and nights cool down to about 5 °C. Expect around 4.3 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 114 mm in total. All in all, October is a so-so month for a holiday in Saint-Jean-sur-Richelieu.
More details for October
- Daylight
- 11 h 3 min07:07 – 18:10
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 18 km/haverage daily peakAll months
- Cloud cover
- 64 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 1 day1 cm or more of fresh snowAll months
- Time zone
- UTC−4offset from UTC
How the score comes together
- Temperatureweight 50 %67 %
- Sunshineweight 20 %22 %
- Few rainy daysweight 30 %43 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- A jumper for the evenings
- Rain jacket or umbrella
Compare two months in Saint-Jean-sur-Richelieu
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
September has the better holiday weather in Saint-Jean-sur-Richelieu: score 77 against 51. In September, days are 7 °C warmer than in October. September has 2 fewer rainy days. The sun shines 2 hours longer a day in September.
| Month | October | September |
|---|---|---|
| Holiday weather score | 51 | 77better |
| Daytime high | 15° | 22° |
| Night-time low | 5° | 12° |
| Sunshine | 4.3 h | 6.0 hbetter |
| Rainy days | 12 | 10better |
| Rainfall | 114 mm | 95 mmbetter |
| Muggy days | 0better | 2 |
Based on the climate averages 1996–2025.
Saint-Jean-sur-Richelieu month by month
The typical weather for every month at a glance.
16January−3° · 3.4 h
In January, Saint-Jean-sur-Richelieu is bitterly cold: daytime highs average −4 °C, and nights often drop below freezing (−13 °C). The sun is scarce, with only about 3.4 hours a day. Precipitation falls on about 11 days, totalling 70 mm; on about 8 of them it snows. All in all, January is not an ideal month for a holiday in Saint-Jean-sur-Richelieu.
Saint-Jean-sur-Richelieu in January22February−2° · 4.4 h
In February, Saint-Jean-sur-Richelieu is bitterly cold: daytime highs average −2 °C, and nights often drop below freezing (−12 °C). Expect around 4.4 hours of sunshine a day. Precipitation falls on about 10 days, totalling 63 mm; on about 7 of them it snows. All in all, February is not an ideal month for a holiday in Saint-Jean-sur-Richelieu.
Saint-Jean-sur-Richelieu in February21March4° · 5.2 h
In March, Saint-Jean-sur-Richelieu is cold: daytime highs average 4 °C, and nights often drop below freezing (−6 °C). Expect around 5.2 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 76 mm in total. Snow falls on about 6 days. All in all, March is not an ideal month for a holiday in Saint-Jean-sur-Richelieu.
Saint-Jean-sur-Richelieu in March47April13° · 6.0 h
In April, Saint-Jean-sur-Richelieu is cool: daytime highs average 13 °C, and nights cool down to about 1 °C. Expect around 6.0 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 101 mm in total. Snow falls on about 2 days. All in all, April is a so-so month for a holiday in Saint-Jean-sur-Richelieu.
Saint-Jean-sur-Richelieu in April76May21° · 7.0 h
In May, Saint-Jean-sur-Richelieu is mild: daytime highs average 21 °C, and nights cool down to about 9 °C. The sun shines for around 7.0 hours a day. Rain is frequent, with about 12 rainy days and 103 mm in total. All in all, May is a good month for a holiday in Saint-Jean-sur-Richelieu.
Saint-Jean-sur-Richelieu in May75June25° · 7.5 h
In June, Saint-Jean-sur-Richelieu is warm: daytime highs average 25 °C, and nights cool down to about 14 °C. The sun shines for around 7.5 hours a day. Rain is frequent, with about 14 rainy days and 122 mm in total. All in all, June is a good month for a holiday in Saint-Jean-sur-Richelieu.
Saint-Jean-sur-Richelieu in June73July28° · 8.0 h
In July, Saint-Jean-sur-Richelieu is hot: daytime highs average 28 °C, and nights cool down to about 17 °C. The sun shines for around 8.0 hours a day. Rain is frequent, with about 13 rainy days and 107 mm in total. On about 6 days the thermometer climbs to 30 °C or more. All in all, July is a good month for a holiday in Saint-Jean-sur-Richelieu.
Saint-Jean-sur-Richelieu in July76August26° · 7.3 h
In August, Saint-Jean-sur-Richelieu is warm: daytime highs average 26 °C, and nights cool down to about 16 °C. The sun shines for around 7.3 hours a day. Rain is frequent, with about 12 rainy days and 110 mm in total. All in all, August is a good month for a holiday in Saint-Jean-sur-Richelieu.
Saint-Jean-sur-Richelieu in August77September22° · 6.0 h
In September, Saint-Jean-sur-Richelieu is warm: daytime highs average 22 °C, and nights cool down to about 12 °C. Expect around 6.0 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 95 mm in total. All in all, September is a good month for a holiday in Saint-Jean-sur-Richelieu.
Saint-Jean-sur-Richelieu in September51October15° · 4.3 h
In October, Saint-Jean-sur-Richelieu is cool: daytime highs average 15 °C, and nights cool down to about 5 °C. Expect around 4.3 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 114 mm in total. All in all, October is a so-so month for a holiday in Saint-Jean-sur-Richelieu.
Saint-Jean-sur-Richelieu in October13November7° · 3.1 h
In November, Saint-Jean-sur-Richelieu is cold: daytime highs average 7 °C, and nights often drop below freezing (−1 °C). The sun is scarce, with only about 3.1 hours a day. Rain is frequent, with about 12 rainy days and 85 mm in total. Snow falls on about 3 days. All in all, November is not an ideal month for a holiday in Saint-Jean-sur-Richelieu.
Saint-Jean-sur-Richelieu in November11December0° · 2.6 h
In December, Saint-Jean-sur-Richelieu is bitterly cold: daytime highs average 0 °C, and nights often drop below freezing (−8 °C). The sun is scarce, with only about 2.6 hours a day. Precipitation falls on about 13 days, totalling 90 mm; on about 8 of them it snows. All in all, December is not an ideal month for a holiday in Saint-Jean-sur-Richelieu.
Saint-Jean-sur-Richelieu in DecemberClimate in detail
Year & climate table
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Saint-Jean-sur-Richelieu
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Frost below 0°
- Cold 0–8°
- Cool 8–15°
- Pleasant 15–20°
ColdOctober: nights around 5°. The room should be heated.
The coolest nights are in January (−13°), the warmest in July (17°). Nights are pleasant for sleeping (15 to 20 °C) from July to August. Nights fall below 8 °C on average from October to April, so the room should be heated.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|
| JanuaryJan | 16 | −4° | −13° | 3.4 h | 11 | 70 |
| FebruaryFeb | 22 | −2° | −12° | 4.4 h | 10 | 63 |
| MarchMar | 21 | 4° | −6° | 5.2 h | 12 | 76 |
| AprilApr | 47 | 13° | 1° | 6.0 h | 12 | 101 |
| MayMay | 76 | 21° | 9° | 7.0 h | 12 | 103 |
| JuneJun | 75 | 25° | 14° | 7.5 h | 14 | 122 |
| JulyJul | 73 | 28° | 17° | 8.0 h | 13 | 107 |
| AugustAug | 76 | 26° | 16° | 7.3 h | 12 | 110 |
| SeptemberSep | 77 | 22° | 12° | 6.0 h | 10 | 95 |
| OctoberOct | 51 | 15° | 5° | 4.3 h | 12 | 114 |
| NovemberNov | 13 | 7° | −1° | 3.1 h | 12 | 85 |
| DecemberDec | 11 | 0° | −8° | 2.6 h | 13 | 90 |
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
45.31° N, 73.26° W · 32 m · America/Toronto
Sunshine
Sunshine hours in Saint-Jean-sur-Richelieu
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 4.3 of 11.0 hours of daylight in Saint-Jean-sur-Richelieu, 39 % of the daylight hours.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
Rain
Rain in Saint-Jean-sur-Richelieu: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Saint-Jean-sur-Richelieu has about 12 rainy days with 114 mm of rain in total.
UV index
UV index in Saint-Jean-sur-Richelieu
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 3 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 9).
Minutes until sunburn in October
- Very fair skin
- about 45 min
- Fair skin
- about 55 min
- Light brown skin
- about 80 min
- Olive skin
- about 100 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Wind & clouds
Wind and clouds in Saint-Jean-sur-Richelieu
How breezy and how cloudy Saint-Jean-sur-Richelieu is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Saint-Jean-sur-Richelieu typically peaks at 18 km/h during the day: Beaufort 3, gentle breeze.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 64 % of the sky over Saint-Jean-sur-Richelieu: variable cloud, with about 4.3 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat & humidity
Heat and humidity in Saint-Jean-sur-Richelieu
How often the day gets hot in Saint-Jean-sur-Richelieu (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Saint-Jean-sur-Richelieu has about 0 hot days, with an average daytime high of 15 °C: pleasant. Heat plays no part this month.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Snow
Snow in Saint-Jean-sur-Richelieu
When Saint-Jean-sur-Richelieu is likely to be white: the chance of seeing snow during a week's stay, the days with fresh snow and how much falls. Tap a month to select it.
Snow calendar
- hardly any
- possible
- likely
- very likely
In October, Saint-Jean-sur-Richelieu has about 1 day with at least 1 cm of fresh snow, 2 cm in total. The chance of seeing snow during a week's stay is 7 out of 100: hardly any.
Snow days bring at least 1 cm of fresh snow. Fresh snow comes from ERA5 snowfall (1996–2025) at the height of the place, not on the slopes above it; the snow chance also weighs whether the snow settles. An estimate from climate averages, not a snow report.
Planning a trip to Saint-Jean-sur-Richelieu
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Saint-Jean-sur-Richelieu in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Saint-Jean-sur-Richelieu has its best school-holiday weather during May half-term (score 76) and its weakest during the Christmas holidays (score 14).
- 39
Easter holidays
Mar – Apr
Poor
- 10 °C by day
- 5.8 h of sun a day
- 12 rainy days a month
Keep in mind: Snow
- 76
May half-term
May – Jun
GoodBest holidays
- 22 °C by day
- 7.1 h of sun a day
- 12 rainy days a month
- 75
Summer holidays
Jul – Aug
Good
- 27 °C by day
- 7.5 h of sun a day
- 13 rainy days a month
- 51
October half-term
Oct
Fair
- 15 °C by day
- 4.3 h of sun a day
- 12 rainy days a month
- 14
Christmas holidays
Dec – Jan
Poor
- −2 °C by day
- 3.0 h of sun a day
- 12 rainy days a month
Keep in mind: Frequent rain, Snow
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 6 h 45 min
- Distance
- 5,190 km
- Time zone
- UTC−4
- Jet lag
- About 3 days (5 h west)
Rule of thumb for flying west: for a few days before, stay up a little later, and get afternoon and evening light at your destination.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Good to know: Canada
- Currency
- Canadian Dollar (CAD)
- Languages
- English, French
- Sockets
- Type A, B · 120 V
- Traffic
- Drives on the right
- Dialling code
- +1
- Emergency number
- 911
UK plugs need a travel adapter
Only 120 V: chargers marked 100–240 V work, other devices need a voltage converter.
Sources: GeoNames (CC BY 4.0) and Wikidata (CC0). Please check details before you travel.
Compare & alternatives
Compare with another place
Saint-Jean-sur-Richelieu compared
Put Saint-Jean-sur-Richelieu side by side with another destination.
Saint-Jean-sur-Richelieu vs Montreal
In October the holiday weather in Saint-Jean-sur-Richelieu and Montreal is about equally good (score 51 vs 47). During the day Montreal is 2 °C cooler than Saint-Jean-sur-Richelieu. Montreal gets one more hour of sunshine a day.
| in October | Saint-Jean-sur-Richelieu | Montreal |
|---|---|---|
| Holiday weather score | 51 | 47 |
| Daytime high | 15° | 13° |
| Sunshine | 4 h | 5 h |
| Rainy days | 12 | 11 |
| Best time | May – Sep | May – Sep |
Through the year
Best places in the country
Canada in October: the best places
In October, Saint-Jean-sur-Richelieu ranks 8 among the 31 nearest destinations in this country.
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- 7Ajax14°52
- 8Saint-Jean-sur-RichelieuThis page15°51
Places nearby
Near Saint-Jean-sur-Richelieu
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Destinations whose weather through the year is closest to Saint-Jean-sur-Richelieu's – good alternatives.
Frequently asked questions about Saint-Jean-sur-Richelieu
When is the best time to visit Saint-Jean-sur-Richelieu?
The best time to visit Saint-Jean-sur-Richelieu is from May to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
What is the warmest month in Saint-Jean-sur-Richelieu?
July is the warmest month, with average highs of 28 °C and nights around 17 °C. January is the coolest month at −4 °C.
When does it rain most in Saint-Jean-sur-Richelieu?
Rain is frequent from November to December; the wettest month is June with 122 mm. The driest month is February with 63 mm.
How many hours of sunshine does Saint-Jean-sur-Richelieu get?
Saint-Jean-sur-Richelieu gets around 1,970 hours of sunshine a year. The sunniest month is July with 8.0 hours a day; in December there are 2.6 hours a day.
What time zone is Saint-Jean-sur-Richelieu in?
Saint-Jean-sur-Richelieu is on UTC−5 in January and UTC−4 in July.
How long is the flight from London to Saint-Jean-sur-Richelieu?
A nonstop flight from London to Saint-Jean-sur-Richelieu takes about 6 h 45 min, for a straight-line distance of about 5,190 km.
Which school holidays are best for Saint-Jean-sur-Richelieu?
Saint-Jean-sur-Richelieu has its best school-holiday weather during May half-term (score 76) and its weakest during the Christmas holidays (score 14). Holiday ratings (0–100): Easter holidays 39, May half-term 76, summer holidays 75, October half-term 51, Christmas holidays 14.