Photo: Martin Cathrae from Charlottetown, PE, Canada · CC BY-SA 2.0Summer arrives in force in Merrickville, hotter than in 83% of Canadian towns
Deep winter brings January lows near −14.0°C. The year swings widely: the coldest month’s nights and the warmest month’s afternoons are 41°C apart. From June to September, highs of 21–27°C make it easy to spend the day outdoors.
No ECCC station in Merrickville has 1991–2020 normals; the page reads Kemptville, 23 km north-east, instead.
A year in Merrickville at a glance
Each month’s typical high and low, in °C.
What stands out about Merrickville’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Merrickville feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
Frost on 157 days, 20°C on 121
The frost season runs October to May, and January freezes nearly every night. On about 17 nights a year the air falls below −20°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
Rain and melted snow: about 925 mm a year
The most falls in July, the least in February. On about 116 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Snowfall: about 180 cm in a normal year
Snow falls from October to April, most of all in January (about 50 cm).
Snowfall by month
Centimetres
Snowfall: Brockville, 27 km away (Kemptville records no complete year of it).
Heating a home in Merrickville
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 Merrickville’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Mild days and mild nights together (17–27°C by day, 8°C or more at night) belong to Jun, Jul, Aug and Sep.
Parks & trails →Plan for about 32 days a year with a wind chill below −20.
Plan shade and water for about 53 days a year above 30 on the humidex.
A typical year is calm by definition; Merrickville’s hazards page covers the exceptions.
Flood & hazards →ECCC’s normals location: Kemptville
Kemptville is a composite: ECCC joins 2 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 23 km north-east |
| Station altitude | 99 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | Brockville, 27 km |
| Coldest reading, 1991–2020 | −35.0°C |
| Hottest reading, 1991–2020 | 36.7°C |
| Average wind | 8.3 km/h on average, most often from the south-west |
| Next-nearest location | Brockville, 27 km |
How Merrickville 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
Nearby places read from a different ECCC location (places on Merrickville’s own would show the same figures).
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Merrickville Kemptville | 26.8°C | −14.0°C | 925 mm |
| Montague 12 km · Drummond Centre | 27.1°C about the same | −14.2°C about the same | 939 mm |
Merrickville 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 | −4.3°C | −14.0°C | −9.1°C | 70 mm | 50 cm |
| February | −2.4°C | −12.9°C | −7.7°C | 52 mm | 41 cm |
| March | 3.4°C | −7.0°C | −1.8°C | 62 mm | 29 cm |
| April | 11.4°C | 0.3°C | 5.9°C | 88 mm | 8 cm |
| May | 19.3°C | 6.9°C | 13.1°C | 73 mm | under 1 cm |
| June | 24.3°C | 12.3°C | 18.3°C | 82 mm | 0 cm |
| July | 26.8°C | 14.8°C | 20.8°C | 98 mm | 0 cm |
| August | 25.6°C | 13.7°C | 19.7°C | 75 mm | 0 cm |
| September | 21.3°C | 9.4°C | 15.4°C | 83 mm | 0 cm |
| October | 13.6°C | 3.6°C | 8.6°C | 92 mm | 1 cm |
| November | 6.3°C | −2.3°C | 2.0°C | 79 mm | 11 cm |
| December | −0.9°C | −8.8°C | −4.9°C | 72 mm | 41 cm |
| Year | 12.0°C | 1.3°C | 6.7°C | 925 mm | 180 cm |
January varies most from one year to the next (3.0°C), June least
March has the widest record range, −28.3°C in 2003 to 26.3°C in 2012; the tick on each bar is the month’s normal.
Where Merrickville’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 normals from ECCC for Kemptville, 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: 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, not in ECCC’s 1991–2020 normals, and the effect of the town’s height, for which there is no figure.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Merrickville’s climate
How warm does Merrickville get in summer?
Afternoons average 26.8°C in July, the warmest time of year.
How cold does Merrickville get in winter?
In January, the coldest month, the typical low is −14.0°C.
How much rain and snow does Merrickville get?
Rain and snow add up to about 925 mm of water a year; July brings the most (98 mm), February the least (52 mm).
Are these figures for Merrickville itself?
No, they come from Kemptville; ECCC keeps no 1991–2020 normals in Merrickville itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Merrickville →
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).