Photo: Doug Kerr · CC BY-SA 2.0Rockland has colder winter nights than 78% of Canadian towns
Peak summer warmth arrives in July, with afternoons near 26.2°C. June is the wettest month, February the driest. Its July heat outdoes that of 62% of Canadian towns. Wet days, with 1 mm of rain or snow or more, come about 118 times a year.
ECCC publishes no normals for Rockland itself; the figures are those of Angers, 24 km west.
A year in Rockland at a glance
Each month’s typical high and low, in °C.
What stands out about Rockland’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Rockland feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
Frost on 179 days, 20°C on 112
Frost comes from September to May; in January almost every night freezes. Deep cold, under −20°C, comes on about 29 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 930 mm of rain and snow a year
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Angers publishes no full year of precipitation or snowfall, so these figures, and the snow below, come from Ottawa (Airport), 41 km away.
Snowfall: about 232 cm in a normal year
Expect snow from October to April, with about 59 cm in January, the snowiest month.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Rockland
91% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Warm days count for nothing; each colder day adds how far its mean sits below 18°C. Homes here need more heating than 60% of Canadian towns.
Living with Rockland’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Plant out after about 26 May; the first frost of autumn usually arrives near 22 September, leaving roughly 119 days without frost.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: Jun, Jul, Aug and Sep.
Parks & trails →Severe weather is a separate story from the averages: see Rockland’s hazards page.
Flood & hazards →ECCC’s normals location: Angers
The page’s figures are ECCC’s 1991–2020 normals for Angers, one of its 450 normals locations.
| Distance from the town | 24 km west |
| Station altitude | 91 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Precipitation from | Ottawa (Airport), 41 km |
| Coldest reading, 1991–2020 | −39.0°C |
| Hottest reading, 1991–2020 | 36.0°C |
| Next-nearest location | Ottawa (Airport), 41 km |
How Rockland compares
Placed among 2,611 Canadian towns and neighbourhoods of 2,500+, each on its nearest normals location; each dot is another location used in Ontario.
Nearby towns’ climate
Places around Rockland whose figures come from another normals location. Distances here run 27–41 km: that is how far the nearest places with figures are from Rockland.
Rockland 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 | −5.6°C | −16.5°C | −11.2°C | 70 mm | 59 cm |
| February | −3.3°C | −15.5°C | −9.5°C | 50 mm | 49 cm |
| March | 2.3°C | −8.7°C | −3.7°C | 66 mm | 39 cm |
| April | 10.7°C | −1.0°C | 5.0°C | 81 mm | 12 cm |
| May | 19.1°C | 5.6°C | 12.2°C | 75 mm | under 1 cm |
| June | 23.8°C | 10.9°C | 17.4°C | 97 mm | 0 cm |
| July | 26.2°C | 13.4°C | 19.6°C | 89 mm | 0 cm |
| August | 25.1°C | 12.5°C | 18.7°C | 79 mm | 0 cm |
| September | 20.4°C | 8.1°C | 14.2°C | 90 mm | 0 cm |
| October | 12.6°C | 2.2°C | 7.4°C | 87 mm | 3 cm |
| November | 5.2°C | −3.5°C | 1.0°C | 74 mm | 21 cm |
| December | −2.1°C | −11.0°C | −7.0°C | 72 mm | 50 cm |
| Year | 11.2°C | −0.3°C | 5.3°C | 930 mm | 232 cm |
January varies most from one year to the next (3.5°C), August least
Bars run from each month’s record low to its record high since 1991. March spans the most, from −33.5°C (2007) to 27.0°C (2012).
Where Rockland’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 normals from ECCC for Angers, its nearest location with complete temperatures.
- Other locations: a location missing months of precipitation or snow is filled from the nearest that has them all, never mixed month by month.
- Comparisons: Canada’s towns and neighbourhoods of 2,500+ (no city totals, no reserves), each through its own nearest location.
- Not on this page: a sunshine figure (ECCC published none for 1991–2020) and any lapse-rate correction for height, as the town has no elevation here.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Rockland’s climate
How warm does Rockland get in summer?
Expect highs near 26.2°C in July, the hottest month on average.
How cold does Rockland get in winter?
A typical January night falls to −16.5°C, the year’s low point.
How much rain and snow does Rockland get?
Over twelve months, rain and melted snow come to 930 mm; the range runs from 50 mm in February to 97 mm in June.
How long does snow stay on the ground?
About 121 days a year have 1 cm of snow or more on the ground.
Are these figures for Rockland itself?
No. ECCC measures normals at Angers, not in Rockland; the page uses the nearest it has.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Rockland →
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).