Lighter winters: about 115 cm of snow a year in Jerome, less than in 81% of Canadian towns
On a normal January night the air cools to about −9.1°C. Only about 139 nights a year bring a frost, fewer than in 73% of Canadian towns. Winter and summer sit 36°C apart. Garden chairs stay out from June to September, the months with highs of 22–27°C.
1991–2020 normals from ECCC’s Hamilton location, 7.1 km south-west.
A year in Jerome at a glance
Each month’s typical high and low, in °C.
What stands out about Jerome’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Jerome feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
139 frost days and 123 days above 20°C a year
From October to May frost is routine, and in January it comes on almost every night. About 13 days a year top 30°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 902 mm of rain and snow a year
The most falls in July, the least in February. Some 114 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 115 cm of snow a year
Snow falls from November to April, most of all in January (about 32 cm).
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Hamilton publishes no full year of snowfall, so these figures come from Toronto Pearson (Airport), 55 km away.
Heating a home in Jerome
92% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Behind the figure: the degrees each day’s mean falls under 18°C, summed for the year. In heating terms, homes need less heating than 77% of Canadian towns.
Living with Jerome’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
The frost-free stretch runs from about 1 May to about 12 October, some 164 days in a normal year.
Afternoons of 17–27°C and nights of at least 8°C arrive in Jun, Jul, Aug and Sep.
Parks & trails →Frostbite weather, a wind chill under −20, turns up on about 20 days a year.
About 59 days a year turn sultry, with the humidex past 30.
For blizzards, floods and wildfire, turn to Jerome’s hazards page.
Flood & hazards →ECCC’s normals location: Hamilton
Hamilton is a composite: ECCC joins 2 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 7.1 km south-west |
| Station altitude | 238 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Snowfall from | Toronto Pearson (Airport), 55 km |
| Coldest reading, 1991–2020 | −30.0°C |
| Hottest reading, 1991–2020 | 36.4°C |
| Average wind | 16.0 km/h on average, most often from the south-west |
| Next-nearest location | Burlington Piers, 11 km |
How Jerome 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
Places around Jerome whose figures come from another normals location. No closer places have figures: these lie 3–30 km from Jerome.
Jerome 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 | −1.4°C | −9.1°C | −5.3°C | 73 mm | 32 cm |
| February | −0.9°C | −9.2°C | −5.0°C | 53 mm | 28 cm |
| March | 4.7°C | −4.4°C | 0.2°C | 69 mm | 17 cm |
| April | 11.8°C | 1.3°C | 6.5°C | 81 mm | 5 cm |
| May | 18.9°C | 7.3°C | 13.1°C | 81 mm | under 1 cm |
| June | 24.2°C | 12.8°C | 18.5°C | 78 mm | 0 cm |
| July | 26.6°C | 15.2°C | 20.9°C | 98 mm | 0 cm |
| August | 25.6°C | 14.5°C | 20.1°C | 67 mm | 0 cm |
| September | 21.7°C | 10.5°C | 16.1°C | 74 mm | 0 cm |
| October | 14.5°C | 4.8°C | 9.7°C | 84 mm | under 1 cm |
| November | 7.7°C | −0.2°C | 3.8°C | 78 mm | 9 cm |
| December | 1.5°C | −5.4°C | −1.9°C | 67 mm | 24 cm |
| Year | 12.9°C | 3.2°C | 8.1°C | 902 mm | 115 cm |
From year to year, January moves by 3.0°C, more than any month, and June least
Records from 1991 to 2020: no month spans more than March, between −24.6°C (2003) and 26.8°C (2012).
Where Jerome’s numbers come from
Averages over 30 years, not a forecast.
- Normals: Environment and Climate Change Canada’s 1991–2020 normals, Hamilton: the nearest of its locations with every month’s temperatures.
- Other locations: precipitation and snowfall come from the nearest location that publishes all twelve months of them, as named above.
- 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 Jerome’s climate
How warm does Jerome get in summer?
Peak warmth comes in July, at about 26.6°C by mid-afternoon.
How cold does Jerome get in winter?
The year’s coldest nights belong to February, at about −9.2°C.
How much rain and snow does Jerome get?
Around 902 mm a year in all, from 98 mm in July down to 53 mm in February.
How long does snow stay on the ground?
The ground is white, with 1 cm or more, on some 82 days a year.
Are these figures for Jerome itself?
Close to it: they are ECCC’s 1991–2020 normals for Hamilton, just outside Jerome’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Jerome →
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).