Trillium gets fewer frosts than 92% of Canadian towns
July afternoons average 25.5°C. Some 32°C separates winter nights from summer afternoons. Have the furnace checked before November to April, the months that average under 10°C.
ECCC publishes no normals for Trillium itself; the figures are those of Burlington Piers, 13 km north-west.
A year in Trillium at a glance
Each month’s typical high and low, in °C.
What stands out about Trillium’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Trillium feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
Frost on about 98 days a year
Frost comes from November to April, most of all in January (about 25 nights).
Frost days by month
Average days at 0°C or below
838 mm of precipitation in a typical year
The most falls in April, the least in February. On about 112 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Precipitation: Vineland, 22 km away (Burlington Piers records no complete year of it).
141 cm of snow in a typical year
Expect snow from November to April, with about 44 cm in January, the snowiest month.
Snowfall by month
Centimetres
ECCC’s Burlington Piers normals leave snowfall out; the figures here come from Welland-Pelham, 43 km away.
Living with Trillium’s climate
What the normals mean for a garden, a day outside and the depth of winter.
The outdoor season by the averages is Jun, Jul, Aug and Sep, with highs of 17–27°C and lows of 8°C or more.
Parks & trails →Expect around 10 days a year when the wind chill sinks below −20.
On some 46 days a year the humidex climbs past 30.
What averages leave out, the floods and ice storms, is on Trillium’s hazards page.
Flood & hazards →ECCC’s normals location: Burlington Piers
Every temperature, frost, snow and degree-day figure on this page is the 1991–2020 normal ECCC publishes for Burlington Piers.
| Distance from the town | 13 km north-west |
| Station altitude | 77 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Precipitation from | Vineland, 22 km |
| Snowfall from | Welland-Pelham, 43 km |
| Coldest reading, 1991–2020 | −25.3°C |
| Hottest reading, 1991–2020 | 36.0°C |
| Average wind | 13.3 km/h on average, most often from the west |
| Next-nearest location | Vineland, 22 km |
How Trillium compares
Compared with 2,611 towns and neighbourhoods of 2,500 or more across Canada; the dots mark the other normals locations in Ontario.
Nearby towns’ climate
Places around Trillium whose figures come from another normals location. The nearest place to Trillium with figures is 10 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Trillium Burlington Piers | 25.5°C | −6.3°C | 838 mm |
| Grimsby 10 km · Vineland | 27.1°C 1.6°C warmer | −6.8°C 0.5°C colder | 838 mm |
Trillium 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 | 0.1°C | −6.3°C | −3.1°C | 71 mm | 44 cm |
| February | 0.7°C | −5.9°C | −2.6°C | 52 mm | 24 cm |
| March | 4.7°C | −1.9°C | 1.4°C | 62 mm | 28 cm |
| April | 10.3°C | 3.3°C | 6.9°C | 83 mm | 5 cm |
| May | 16.7°C | 9.0°C | 12.9°C | 70 mm | 0 cm |
| June | 22.4°C | 15.1°C | 18.8°C | 78 mm | 0 cm |
| July | 25.5°C | 18.3°C | 21.9°C | 74 mm | 0 cm |
| August | 24.9°C | 18.3°C | 21.6°C | 69 mm | 0 cm |
| September | 21.4°C | 14.6°C | 18.1°C | 69 mm | 0 cm |
| October | 14.8°C | 8.3°C | 11.6°C | 77 mm | under 1 cm |
| November | 8.4°C | 2.7°C | 5.6°C | 72 mm | 9 cm |
| December | 2.9°C | −2.5°C | 0.2°C | 62 mm | 32 cm |
| Year | 12.7°C | 6.1°C | 9.4°C | 838 mm | 141 cm |
February strays furthest from its normal year to year, by 2.7°C; August the least
Bars run from each month’s record low to its record high since 1991. March spans the most, from −21.2°C (2003) to 24.4°C (1998).
Where Trillium’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the closest ECCC location with twelve months of temperature normals, Burlington Piers, 1991–2020.
- Other locations: ECCC blanks a month that fails its completeness rule, so the precipitation or snowfall here comes from the next location with all twelve months.
- Comparisons: every Canadian town and neighbourhood of 2,500 or more, each read from its own nearest location; city totals and reserves are left out.
- Not on this page: sunshine, which none of ECCC’s 450 locations publishes for 1991–2020, and the town’s own height above sea level, so no figure is adjusted for altitude.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Trillium’s climate
How warm does Trillium get in summer?
Highs reach 25.5°C on an average July day; no month is warmer.
How cold does Trillium get in winter?
Of all twelve months, January has the coldest nights, about −6.3°C.
How much rain and snow does Trillium get?
Rain and snow, with snow counted as water, total 838 mm a year; April leads with 83 mm and February trails with 52 mm.
Are these figures for Trillium itself?
Not as such: Burlington Piers is the nearest normals location, and Trillium has none.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Trillium →
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).