Photo: P199 · CC BY-SA 3.0July in Smiths Falls runs hotter than in 88% of Canadian towns
Deep winter brings January lows near −14.2°C. Seasons differ by 41°C, from the coldest nights to the warmest afternoons. Its yearly rain and snow top those of 62% of Canadian towns. The heating season runs October to April: each of those months averages under 10°C.
No ECCC station in Smiths Falls has 1991–2020 normals; the page reads Drummond Centre, 23 km north-west, instead.
A year in Smiths Falls at a glance
Each month’s typical high and low, in °C.
What stands out about Smiths Falls’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Smiths Falls feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
163 frost days and 121 days above 20°C a year
The frost season runs September to May, and January freezes nearly every night. Deep cold, under −20°C, comes on about 19 nights a year.
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 brings the most rain and snow; February, the least. About 123 days a year bring 1 mm or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 187 cm of snow a year
Expect snow from October to April, with about 46 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 Smiths Falls
92% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
The count adds up, day by day, how far the mean temperature falls short of 18°C.
Living with Smiths Falls’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
For long days outdoors, Jun, Aug and Sep bring highs of 17–27°C and lows of 8°C or more.
Parks & trails →A normal year has no blizzard, flood or heat wave in it; Smiths Falls’s hazards page looks at those.
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 | 23 km north-west |
| 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 | Kemptville, 32 km |
How Smiths Falls 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 Smiths Falls’s would only repeat its figures. Smiths Falls has few close neighbours with figures, so the list reaches 12–34 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Smiths Falls Drummond Centre | 27.1°C | −14.2°C | 939 mm |
| Merrickville 12 km · Kemptville | 26.8°C about the same | −14.0°C about the same | 925 mm |
| Rideau Lakes 25 km · Brockville | 26.1°C 1.0°C cooler | −11.3°C 2.9°C milder | 1,017 mm |
Smiths Falls 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 |
March: −33.0°C at its coldest, 27.0°C at its warmest
Year to year, January varies most (a standard deviation of 3.0°C around −9.5°C) and June least (1.1°C).
Where Smiths Falls’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the closest ECCC location with twelve months of temperature normals, Drummond Centre, 1991–2020.
- Comparisons: the 2,500-plus towns and neighbourhoods of Canada, each read from its closest normals location; whole cities and reserves aren’t counted.
- Not on this page: sunshine, absent from every 1991–2020 location, and an altitude correction, for want of the town’s own elevation.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Smiths Falls’s climate
How warm does Smiths Falls get in summer?
In July, the warmest month, the typical high is 27.1°C.
How cold does Smiths Falls get in winter?
Lows sink to −14.2°C on an average January night.
How much rain and snow does Smiths Falls get?
The year adds up to 939 mm. September is the peak month (91 mm) and February the low one (57 mm).
How long does snow stay on the ground?
Around 116 days a year see 1 cm of snow or more lying.
Are these figures for Smiths Falls itself?
Not exactly. Smiths Falls lacks a normals station, so Drummond Centre supplies the figures.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Smiths Falls →
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).