Photo: Dan MacNeal · CC BY 4.0For weather, Grand Valley is about as ordinary as Canadian towns get
July afternoons reach 25.4°C on a typical day and January nights drop to −10.7°C; 1,035 mm of rain and melted snow falls in a year. Counting rain and snow together, it is wetter than 70% of Canadian towns. Expect the most rain and snow in June and the least in March. The heating season runs October to April: each of those months averages under 10°C.
The nearest ECCC normals location to Grand Valley is Elora, 29 km south, and every figure on this page is its.
A year in Grand Valley at a glance
Each month’s typical high and low, in °C.
What stands out about Grand Valley’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Grand Valley feels like
Each season’s and each month’s usual high and low, 1991–2020.
Frost on 156 days, 20°C on 116
The frost season runs October to May, and January freezes nearly every night. Deep cold, under −20°C, comes on about 8 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
1,035 mm of precipitation in a typical year
Some 140 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Elora publishes no full year of precipitation, so these figures come from Mount Forest, 35 km away.
About 174 cm of snow a year
Snow falls from October to April, most of all in December (about 42 cm).
Snowfall by month
Centimetres
Elora publishes no full year of snowfall, so these figures come from Egbert, 57 km away.
Heating a home in Grand Valley
91% 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. By this count, homes here need less heating than 66% of Canadian towns.
Living with Grand Valley’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Highs of 17–27°C with nights of 8°C or more come in Jun, Jul, Aug and Sep.
Parks & trails →Plan for about 27 days a year with a wind chill below −20.
About 44 days a year turn sultry, with the humidex past 30.
Bad-weather days, from blizzards to floods, get their own page for Grand Valley: the hazards page.
Flood & hazards →ECCC’s normals location: Elora
ECCC builds the Elora normals from 2 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 29 km south |
| Station altitude | 376 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Precipitation from | Mount Forest, 35 km |
| Snowfall from | Egbert, 57 km |
| Coldest reading, 1991–2020 | −31.2°C |
| Hottest reading, 1991–2020 | 34.8°C |
| Average wind | 14.2 km/h on average, most often from the west |
| Next-nearest location | Mount Forest, 35 km |
How Grand Valley 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 Grand Valley’s own would show the same figures). No closer places have figures: these lie 22–28 km from Grand Valley.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Grand Valley Elora | 25.4°C | −10.7°C | 1,035 mm |
| Mono 22 km · Egbert | 26.0°C 0.6°C warmer | −11.3°C 0.6°C colder | 793 mm |
| Mount Forest 24 km · Mount Forest | 25.1°C about the same | −10.9°C about the same | 1,035 mm |
| Melancthon 28 km · Collingwood | 25.3°C about the same | −8.7°C 2.0°C milder | 793 mm |
Grand Valley 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 | −3.1°C | −10.7°C | −6.9°C | 92 mm | 40 cm |
| February | −2.4°C | −11.0°C | −6.7°C | 73 mm | 33 cm |
| March | 3.1°C | −6.0°C | −1.5°C | 68 mm | 26 cm |
| April | 10.9°C | 0.3°C | 5.6°C | 74 mm | 9 cm |
| May | 18.3°C | 6.3°C | 12.3°C | 98 mm | under 1 cm |
| June | 23.2°C | 11.4°C | 17.3°C | 100 mm | 0 cm |
| July | 25.4°C | 13.5°C | 19.5°C | 98 mm | 0 cm |
| August | 24.6°C | 12.6°C | 18.6°C | 84 mm | 0 cm |
| September | 21.0°C | 8.9°C | 15.0°C | 85 mm | 0 cm |
| October | 13.4°C | 3.4°C | 8.5°C | 81 mm | 3 cm |
| November | 6.2°C | −1.5°C | 2.4°C | 92 mm | 22 cm |
| December | 0.0°C | −6.3°C | −3.3°C | 90 mm | 42 cm |
| Year | 11.7°C | 1.8°C | 6.7°C | 1,035 mm | 174 cm |
The most changeable month: February, give or take 3.1°C; the steadiest, June
Bars run from each month’s record low to its record high since 1991. March spans the most, from −27.5°C (2003) to 26.4°C (2012).
Where Grand Valley’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 Canadian Climate Normals at Elora, the closest ECCC location with twelve months of temperature normals.
- Other locations: where a location publishes no full year of precipitation or snowfall, the nearest one that does supplies it, named beside those figures.
- Comparisons: a pool of Canadian towns and neighbourhoods of 2,500 or more, read alike; whole cities and reserves stay out of it.
- 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 Grand Valley’s climate
How warm does Grand Valley get in summer?
The warmest month is July, when afternoons average 25.4°C.
How cold does Grand Valley get in winter?
In February, the coldest month, the typical low is −11.0°C.
How much rain and snow does Grand Valley get?
Some 1,035 mm falls in a year. Most of it comes in June (100 mm), the least in March (68 mm).
Are these figures for Grand Valley itself?
No, the station behind them is Elora, beyond Grand Valley’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Grand Valley →
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).