Precipitation in Saint-Roch-de-Richelieu tops that of 82% of Canadian towns: 1,109 mm a year
July afternoons average 26.0°C. By January nights alone, it runs colder than 71% of Canadian towns. August is the wettest month, February the driest. Windshields need scraping on about 161 mornings a year, the days the air reaches 0°C or below.
Saint-Roch-de-Richelieu has no ECCC normals station of its own: every figure here comes from Fleury, 16 km south-east.
A year in Saint-Roch-de-Richelieu at a glance
Each month’s typical high and low, in °C.
What stands out about Saint-Roch-de-Richelieu’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Saint-Roch-de-Richelieu feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
Frost on 161 days, 20°C on 115
From September to May frost is routine, and in January it comes on almost every night. Some 20 nights a year drop under −20°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 1,109 mm of rain and snow a year
Some 145 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
202 cm of snow in a typical year
From October to April snow is likely; December is the peak, at about 49 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Saint-Roch-de-Richelieu
92% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
A day averaging 10 degrees under 18°C adds 10 to the total; warm days add nothing.
Living with Saint-Roch-de-Richelieu’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Wait until about 12 May to plant out; frost tends to come back around 27 September, about 136 days later.
Highs of 17–27°C with nights of 8°C or more come in Jun, Jul, Aug and Sep.
Parks & trails →A normal year has no blizzard, flood or heat wave in it; Saint-Roch-de-Richelieu’s hazards page looks at those.
Flood & hazards →ECCC’s normals location: Fleury
The page’s figures are ECCC’s 1991–2020 normals for Fleury, one of its 450 normals locations.
| Distance from the town | 16 km south-east |
| Station altitude | 31 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −39.0°C |
| Hottest reading, 1991–2020 | 35.1°C |
| Next-nearest location | L'Assomption, 23 km |
How Saint-Roch-de-Richelieu compares
Compared with 2,611 towns and neighbourhoods of 2,500 or more across Canada; the dots mark the other normals locations in Quebec.
Nearby towns’ climate
Nearby places read from a different ECCC location (places on Saint-Roch-de-Richelieu’s own would show the same figures).
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Saint-Roch-de-Richelieu Fleury | 26.0°C | −14.8°C | 1,109 mm |
| Saint-Ours 1.1 km · Fleury | 26.0°C about the same | −14.8°C about the same | 1,109 mm |
| Contrecoeur 5.6 km · L'Assomption | 26.6°C 0.6°C warmer | −16.0°C 1.2°C colder | 1,109 mm |
Saint-Roch-de-Richelieu weather by month
Average daily high and low, mean temperature, rain and snow (as water) and snowfall by month, 1991–2020.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −5.8°C | −14.8°C | −10.5°C | 81 mm | 45 cm |
| February | −3.8°C | −13.6°C | −8.6°C | 61 mm | 43 cm |
| March | 1.8°C | −7.3°C | −2.7°C | 71 mm | 38 cm |
| April | 10.5°C | 0.6°C | 5.8°C | 96 mm | 13 cm |
| May | 19.1°C | 7.4°C | 13.2°C | 98 mm | under 1 cm |
| June | 23.9°C | 12.7°C | 18.4°C | 102 mm | 0 cm |
| July | 26.0°C | 14.9°C | 20.2°C | 106 mm | 0 cm |
| August | 25.0°C | 13.7°C | 19.3°C | 114 mm | 0 cm |
| September | 20.7°C | 9.4°C | 15.1°C | 97 mm | 0 cm |
| October | 13.0°C | 3.6°C | 8.4°C | 108 mm | 2 cm |
| November | 5.5°C | −2.0°C | 1.9°C | 90 mm | 12 cm |
| December | −2.0°C | −9.3°C | −5.9°C | 85 mm | 49 cm |
| Year | 11.2°C | 1.3°C | 6.2°C | 1,109 mm | 202 cm |
A March here can run from −31.0°C to 25.5°C
January is the least predictable month: about two years in three its average lands within 3.1°C of the normal, −10.5°C. August is the steadiest, within 0.9°C.
Where Saint-Roch-de-Richelieu’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Fleury, 1991–2020, chosen as the nearest location with a full temperature record.
- Comparisons: Canadian towns and neighbourhoods of at least 2,500, each placed by its nearest location (city totals and reserves excluded).
- Not on this page: hours of sunshine, missing from the 1991–2020 normals, and a height correction: the town has no elevation on file.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Saint-Roch-de-Richelieu’s climate
How warm does Saint-Roch-de-Richelieu get in summer?
At its warmest, in July, the normal high is 26.0°C.
How cold does Saint-Roch-de-Richelieu get in winter?
Midwinter means January, when a typical night reaches −14.8°C.
How much rain and snow does Saint-Roch-de-Richelieu get?
Count on roughly 1,109 mm a year, heaviest in August (114 mm) and lightest in February (61 mm).
How long does snow stay on the ground?
About 106 days a year have 1 cm of snow or more on the ground.
Are these figures for Saint-Roch-de-Richelieu itself?
The figures are ECCC’s for Fleury; Saint-Roch-de-Richelieu has no normals station.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Saint-Roch-de-Richelieu →
Adapted from Statistics Canada (Census of Population 2021, population estimates 2025, 2021 census boundaries) under the Statistics Canada Open Licence; this does not constitute an endorsement by Statistics Canada. Neighbourhood names in some cities © OpenStreetMap contributors (ODbL).