Marritt gets less snow than 81% of Canadian towns: about 115 cm a year
In January the night’s low is typically −9.1°C. By frosts alone, it ranks gentler than 73% of Canadian towns. Precipitation peaks in July and eases off in February. For walks and days out, the stretch from June to September brings highs of 22–27°C.
Figures: ECCC’s 1991–2020 normals for Hamilton (4.7 km south).
A year in Marritt at a glance
Each month’s typical high and low, in °C.
What stands out about Marritt’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Marritt 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
902 mm of precipitation in a typical year
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
Snowfall: about 115 cm in a normal 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), 59 km away.
Heating a home in Marritt
92% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
One degree below 18°C for one day makes one heating degree day; the year’s days are added together. A house here needs less heating than 77% of Canadian towns.
Living with Marritt’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Plant out after about 1 May; the first frost of autumn usually arrives near 12 October, leaving roughly 164 days without frost.
Highs of 17–27°C with nights of 8°C or more come in Jun, Jul, Aug and Sep.
Parks & trails →About 20 days a year bring a wind chill under −20, when bare skin chills fast.
Humid heat, a humidex over 30, comes on about 59 days a year.
For the weather that does damage, from ice storms to floods, see Marritt’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 | 4.7 km south |
| Station altitude | 238 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Snowfall from | Toronto Pearson (Airport), 59 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, 16 km |
How Marritt compares
Placed among 2,611 Canadian towns and neighbourhoods of 2,500+, each on its nearest normals location; each dot is another location used in Ontario.
Nearby towns’ climate
Places around Marritt whose figures come from another normals location. Marritt has few close neighbours with figures, so the list reaches 8–34 km out.
Marritt 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 | −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 |
Two years in three, January’s average lands within 3.0°C of normal, against the steadier June
The thirty-year records stretch furthest in March: a low of −24.6°C in 2003 and a high of 26.8°C in 2012.
Where Marritt’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the Canadian Climate Normals, 1991–2020, at Hamilton (the closest location with all twelve months of 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, 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 Marritt’s climate
How warm does Marritt get in summer?
A normal July afternoon tops out at about 26.6°C, the year’s high point.
How cold does Marritt get in winter?
Of all twelve months, February has the coldest nights, about −9.2°C.
How much rain and snow does Marritt get?
Over twelve months, rain and melted snow come to 902 mm; the range runs from 53 mm in February to 98 mm in July.
How long does snow stay on the ground?
There is 1 cm of snow or more on the ground on roughly 82 days a year.
Are these figures for Marritt itself?
They are the normals for Hamilton, measured just outside Marritt itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Marritt →
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).