Photo: P199 · Public domainJuly in Lanark Highlands runs hotter than in 88% of Canadian towns
On a normal January night the air cools to about −14.2°C. None of its 4 nearest neighbours on other locations gets less rain and snow. A year here swings 41°C from midwinter lows to midsummer highs. For walks and days out, June, August and September bring highs of 21–26°C.
Borrowed figures: Lanark Highlands has no normals station, so these come from Drummond Centre, 18 km east.
A year in Lanark Highlands at a glance
Each month’s typical high and low, in °C.
What stands out about Lanark Highlands’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Lanark Highlands feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
About 163 frosts and 121 warm days a year
The frost season runs September to May, and January freezes nearly every night. Some 19 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
939 mm of precipitation in a typical year
September is the wettest month and February the driest. On about 123 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 187 cm of snow a year
From October to April snow is likely; January is the peak, at about 46 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Lanark Highlands
92% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Degree days add up how far each day’s mean temperature falls below 18°C over a year.
Living with Lanark Highlands’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: Jun, Aug and Sep.
Parks & trails →For the weather that does damage, from ice storms to floods, see Lanark Highlands’s hazards page.
Flood & hazards →ECCC’s normals location: Drummond Centre
The page’s figures are ECCC’s 1991–2020 normals for Drummond Centre, one of its 450 normals locations.
| Distance from the town | 18 km east |
| Station altitude | 145 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −36.0°C |
| Hottest reading, 1991–2020 | 37.0°C |
| Next-nearest location | Luskville, 64 km |
How Lanark Highlands compares
Against the 2,611 Canadian towns and neighbourhoods of 2,500 or more, each read from its own normals location; the dots are the other locations those towns use in Ontario.
Nearby towns’ climate
The nearest places on a normals location of their own: those that share Lanark Highlands’s would only repeat its figures. Lanark Highlands has few close neighbours with figures, so the list reaches 39–50 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Lanark Highlands Drummond Centre | 27.1°C | −14.2°C | 939 mm |
| Central Frontenac 39 km · Centreville | 27.2°C about the same | −12.4°C 1.8°C milder | 984 mm |
| McNab/Braeside 40 km · Charteris | 26.4°C 0.7°C cooler | −16.9°C 2.7°C colder | 968 mm |
| Arnprior 44 km · Luskville | 26.9°C about the same | −16.0°C 1.8°C colder | 968 mm |
| Rideau Lakes 46 km · Brockville | 26.1°C 1.0°C cooler | −11.3°C 2.9°C milder | 1,017 mm |
Lanark Highlands weather by month
Month by month, 1991–2020: the usual high, low and mean, the rain and snow, and the snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −4.6°C | −14.2°C | −9.5°C | 74 mm | 46 cm |
| February | −2.3°C | −13.5°C | −8.0°C | 57 mm | 40 cm |
| March | 3.7°C | −7.3°C | −1.9°C | 62 mm | 27 cm |
| April | 11.6°C | 0.1°C | 5.9°C | 78 mm | 11 cm |
| May | 19.8°C | 6.8°C | 13.2°C | 74 mm | under 1 cm |
| June | 24.4°C | 11.9°C | 18.1°C | 89 mm | 0 cm |
| July | 27.1°C | 14.3°C | 20.7°C | 89 mm | 0 cm |
| August | 25.8°C | 13.2°C | 19.5°C | 88 mm | 0 cm |
| September | 21.2°C | 9.1°C | 15.2°C | 91 mm | 0 cm |
| October | 13.3°C | 3.5°C | 8.4°C | 87 mm | 2 cm |
| November | 5.9°C | −2.4°C | 1.8°C | 75 mm | 17 cm |
| December | −1.2°C | −9.0°C | −5.1°C | 74 mm | 43 cm |
| Year | 12.1°C | 1.0°C | 6.5°C | 939 mm | 187 cm |
Two years in three, January’s average lands within 3.0°C of normal, against the steadier June
Over 1991–2020, March saw both −33.0°C (2007) and 27.0°C (2012), the widest span of any month.
Where Lanark Highlands’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 normals from ECCC for Drummond Centre, its nearest location with complete temperatures.
- Comparisons: Canada’s towns and neighbourhoods of 2,500+ (no city totals, no reserves), each through its own nearest location.
- 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 Lanark Highlands’s climate
How warm does Lanark Highlands get in summer?
The year’s warmest days come in July, with highs averaging 27.1°C.
How cold does Lanark Highlands get in winter?
January nights average −14.2°C, the coldest of the year.
How much rain and snow does Lanark Highlands get?
Rain and snow, with snow counted as water, total 939 mm a year; September leads with 91 mm and February trails with 57 mm.
How long does snow stay on the ground?
A layer of at least 1 cm stays down on about 116 days a year.
Are these figures for Lanark Highlands itself?
They are borrowed from Drummond Centre, the nearest place to Lanark Highlands where ECCC publishes 1991–2020 normals.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Lanark Highlands →
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).