Ice rarely forms: Trinity sees fewer frosts than 73% of Canadian towns
Peak summer warmth arrives in July, with afternoons near 26.6°C. By July afternoons alone, it runs hotter than 70% of Canadian towns. Expect the most rain and snow in July and the least in February. The furnace earns its keep from October to April, the months that average under 10°C.
Figures: ECCC’s 1991–2020 normals for Hamilton (11 km west).
A year in Trinity at a glance
Each month’s typical high and low, in °C.
What stands out about Trinity’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Trinity 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
Frost comes from October to May; in January almost every night freezes. Heat of 30°C or more comes on about 13 days a year.
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
On about 114 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 141 cm of snow a year
Snow falls from November to April, most of all in January (about 44 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 Welland-Pelham, 50 km away.
Heating a home in Trinity
92% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Warm days count for nothing; each colder day adds how far its mean sits below 18°C. Over a year, a home here needs less heating than 77% of Canadian towns.
Living with Trinity’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Between the last frost, near 1 May, and the first, near 12 October, lie about 164 frost-free days.
Highs of 17–27°C with nights of 8°C or more come in Jun, Jul, Aug and Sep.
Parks & trails →Bitter wind chill, under −20, comes on about 20 days a year.
Roughly 59 days a year feel hotter than 30 once humidity is counted.
Averages smooth over blizzards, ice storms, floods and heat waves; Trinity’s hazards page covers the risks.
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 | 11 km west |
| Station altitude | 238 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Snowfall from | Welland-Pelham, 50 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, 13 km |
How Trinity 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
The nearest places on a normals location of their own: those that share Trinity’s would only repeat its figures.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Trinity Hamilton | 26.6°C | −9.1°C | 902 mm |
| Valley Park 1.4 km · Hamilton | 26.6°C about the same | −9.1°C about the same | 902 mm |
| Albion 2.4 km · Burlington Piers | 25.5°C 1.1°C cooler | −6.3°C 2.8°C milder | 902 mm |
Trinity 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 | 44 cm |
| February | −0.9°C | −9.2°C | −5.0°C | 53 mm | 24 cm |
| March | 4.7°C | −4.4°C | 0.2°C | 69 mm | 28 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 | 0 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 | 32 cm |
| Year | 12.9°C | 3.2°C | 8.1°C | 902 mm | 141 cm |
Two years in three, January’s average lands within 3.0°C of normal, against the steadier June
Bars run from each month’s record low to its record high since 1991. March spans the most, from −24.6°C (2003) to 26.8°C (2012).
Where Trinity’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 normals from ECCC for Hamilton, its nearest location with complete temperatures.
- Other locations: precipitation and snowfall come from the nearest location that publishes all twelve months of them, as named above.
- Comparisons: Canadian towns and neighbourhoods of at least 2,500, each placed by its nearest location (city totals and reserves excluded).
- Not on this page: a sunshine figure (ECCC published none for 1991–2020) and any lapse-rate correction for height, as the town has no elevation here.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Trinity’s climate
How warm does Trinity get in summer?
Peak warmth comes in July, at about 26.6°C by mid-afternoon.
How cold does Trinity get in winter?
A typical February night falls to −9.2°C, the year’s low point.
How much rain and snow does Trinity get?
A normal year brings 902 mm, snow included as water: July is wettest at 98 mm, February driest at 53 mm.
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 Trinity itself?
Almost: ECCC’s Hamilton location, which gives these figures, lies a short way outside Trinity.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Trinity →
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).