Photo: Canmenwalker · CC BY 4.0Summer afternoons in Richmond Hill are warmer than in 91% of Canadian towns
On a normal January night the air cools to about −10.1°C. Frost is rarer than in 70% of Canadian towns: about 145 nights a year drop below freezing. Rain or snow is most frequent in June and least in February. Picnics, hikes and garden evenings suit June, August and September, with highs of 22–26°C.
No ECCC station in Richmond Hill has 1991–2020 normals; the page reads Toronto Buttonville (Airport), 5.9 km south-east, instead.
A year in Richmond Hill at a glance
Each month’s typical high and low, in °C.
What stands out about Richmond Hill’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Richmond Hill feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
145 frost days and 126 days above 20°C a year
Frost comes from October to May; in January almost every night freezes. On about 6 nights a year the air falls below −20°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
Rain and melted snow: about 862 mm a year
About 113 days a year bring 1 mm or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 146 cm of snow a year
Snow falls from November to April, most of all in January (about 40 cm).
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Richmond Hill
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Think of it as a year’s worth of daily shortfalls below 18°C, added up. Over a year, a home here needs less heating than 74% of Canadian towns.
Living with Richmond Hill’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
A normal year gives the garden about 161 frost-free days, roughly 3 May to 13 October.
For long days outdoors, Jun, Aug and Sep bring highs of 17–27°C and lows of 8°C or more.
Parks & trails →Expect around 22 days a year when the wind chill sinks below −20.
About 55 days a year feel above 30 on the humidex.
Thirty-year normals hide the storms and the extremes: the hazards page has Richmond Hill’s risks.
Flood & hazards →ECCC’s normals location: Toronto Buttonville (Airport)
Behind the 1991–2020 normals for Toronto Buttonville (Airport) are 3 stations, which ECCC combines into one record.
| Distance from the town | 5.9 km south-east |
| Station altitude | 198 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −35.2°C |
| Hottest reading, 1991–2020 | 37.8°C |
| Average wind | 12.2 km/h on average, most often from the north |
| Next-nearest location | Toronto (City), 24 km |
How Richmond Hill 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 Richmond Hill’s own would show the same figures). Distances here run 19–29 km: that is how far the nearest places with figures are from Richmond Hill.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Richmond Hill Toronto Buttonville (Airport) | 27.3°C | −10.1°C | 862 mm |
| Toronto 19 km · Toronto (City) | 27.0°C about the same | −6.7°C 3.4°C milder | 823 mm |
| East Gwillimbury 25 km · Udora | 26.3°C 1.0°C cooler | −11.7°C 1.6°C colder | 883 mm |
| Pickering 27 km · Oshawa | 25.7°C 1.6°C cooler | −8.9°C 1.2°C milder | 906 mm |
| Bradford 27 km · Egbert | 26.0°C 1.3°C cooler | −11.3°C 1.2°C colder | 793 mm |
| Bolton 29 km · Toronto Pearson (Airport) | 27.4°C about the same | −8.9°C 1.2°C milder | 807 mm |
Richmond Hill 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 | −1.7°C | −10.1°C | −6.0°C | 64 mm | 40 cm |
| February | −1.0°C | −10.1°C | −5.6°C | 51 mm | 34 cm |
| March | 4.6°C | −5.0°C | −0.2°C | 52 mm | 20 cm |
| April | 11.8°C | 1.2°C | 6.5°C | 79 mm | 7 cm |
| May | 19.3°C | 7.4°C | 13.4°C | 80 mm | under 1 cm |
| June | 24.6°C | 13.0°C | 18.8°C | 87 mm | 0 cm |
| July | 27.3°C | 15.6°C | 21.5°C | 85 mm | 0 cm |
| August | 26.3°C | 14.8°C | 20.6°C | 72 mm | 0 cm |
| September | 21.9°C | 10.4°C | 16.2°C | 83 mm | 0 cm |
| October | 14.3°C | 4.3°C | 9.4°C | 71 mm | 1 cm |
| November | 7.4°C | −0.8°C | 3.3°C | 77 mm | 12 cm |
| December | 1.5°C | −5.8°C | −2.2°C | 63 mm | 33 cm |
| Year | 13.0°C | 2.9°C | 8.0°C | 862 mm | 146 cm |
From year to year, January moves by 3.1°C, more than any month, and June least
Each bar spans a month’s coldest and warmest readings over thirty years; March’s run from −25.6°C in 2003 to 26.3°C in 2012.
Where Richmond Hill’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Toronto Buttonville (Airport), 1991–2020, chosen as the nearest location with a full temperature record.
- Comparisons: the towns and neighbourhoods of 2,500+ across Canada, each on its nearest normals location, without the city totals or the reserves.
- 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 Richmond Hill’s climate
How warm does Richmond Hill get in summer?
Afternoons average 27.3°C in July, the warmest time of year.
How cold does Richmond Hill get in winter?
Winter bottoms out in January, with lows near −10.1°C.
How much rain and snow does Richmond Hill get?
The year adds up to 862 mm. June is the peak month (87 mm) and February the low one (51 mm).
How long does snow stay on the ground?
Snow covers the ground, 1 cm or more, on about 76 days a year.
Are these figures for Richmond Hill itself?
No, the station behind them is Toronto Buttonville (Airport), beyond Richmond Hill’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Richmond Hill →
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).