Photo: Municipal Affairs and Housing · CC BY 2.0Orillia is wetter than 79% of Canadian towns: 1,062 mm of rain and snow a year
January mornings start at about −12.6°C. Frost is rarer than in 72% of Canadian towns: about 142 nights a year drop below freezing. Winter and summer sit 37°C apart. Homes need heating from October to April, the months averaging under 10°C.
These are not Orillia’s own readings: ECCC keeps no normals there, so the page uses Lagoon City, 18 km east.
A year in Orillia at a glance
Each month’s typical high and low, in °C.
What stands out about Orillia’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Orillia feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
142 frost days and 104 days above 20°C a year
The frost season runs October to April, and January freezes nearly every night. On about 14 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 1,062 mm a year
October brings the most rain and snow; February, the least. About 141 days a year bring 1 mm or more.
Rain and snow by month
Millimetres
ECCC’s Lagoon City normals leave precipitation out; the figures here come from Muskoka, 42 km away.
About 167 cm of snow a year
The snow season runs October to April; January brings the most, about 42 cm.
Snowfall by month
Centimetres
Lagoon City publishes no full year of snowfall, so these figures come from Udora, 44 km away.
Heating a home in Orillia
92% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Heating degree days total each day’s gap between its mean temperature and 18°C.
Living with Orillia’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Afternoons of 17–27°C and nights of at least 8°C arrive in Jun, Jul, Aug and Sep.
Parks & trails →Roughly 37 days a year feel colder than −20 in the wind.
Plan shade and water for about 42 days a year above 30 on the humidex.
A typical year is calm by definition; Orillia’s hazards page covers the exceptions.
Flood & hazards →ECCC’s normals location: Lagoon City
The page’s figures are ECCC’s 1991–2020 normals for Lagoon City, one of its 450 normals locations.
| Distance from the town | 18 km east |
| Station altitude | 221 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Precipitation from | Muskoka, 42 km |
| Snowfall from | Udora, 44 km |
| Coldest reading, 1991–2020 | −33.8°C |
| Hottest reading, 1991–2020 | 34.1°C |
| Average wind | 16.2 km/h on average, most often from the north |
| Next-nearest location | Muskoka, 42 km |
How Orillia 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
The nearest places on a normals location of their own: those that share Orillia’s would only repeat its figures. The nearest places to Orillia with figures are 31–35 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Orillia Lagoon City | 24.5°C | −12.6°C | 1,062 mm |
| Tay 31 km · Muskoka | 25.3°C 0.8°C warmer | −15.3°C 2.7°C colder | 1,062 mm |
| Springwater 33 km · Egbert | 26.0°C 1.5°C warmer | −11.3°C 1.3°C milder | 793 mm |
| Beaverton 35 km · Udora | 26.3°C 1.8°C warmer | −11.7°C 0.9°C milder | 883 mm |
Orillia 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 | −3.8°C | −12.6°C | −8.2°C | 92 mm | 42 cm |
| February | −2.6°C | −12.4°C | −7.5°C | 56 mm | 36 cm |
| March | 2.2°C | −7.1°C | −2.5°C | 72 mm | 21 cm |
| April | 8.8°C | 0.5°C | 4.7°C | 79 mm | 8 cm |
| May | 16.7°C | 8.0°C | 12.3°C | 93 mm | under 1 cm |
| June | 22.0°C | 13.5°C | 17.8°C | 86 mm | 0 cm |
| July | 24.5°C | 16.4°C | 20.4°C | 100 mm | 0 cm |
| August | 23.8°C | 15.6°C | 19.7°C | 82 mm | 0 cm |
| September | 20.2°C | 11.4°C | 15.8°C | 102 mm | 0 cm |
| October | 12.8°C | 5.6°C | 9.2°C | 111 mm | 2 cm |
| November | 5.9°C | −0.6°C | 2.7°C | 103 mm | 19 cm |
| December | −0.3°C | −7.0°C | −3.6°C | 87 mm | 40 cm |
| Year | 10.9°C | 2.6°C | 6.7°C | 1,062 mm | 167 cm |
A January here can run warm or cold, its average moving by about 3.1°C; the steadiest month is June
Over 1991–2020, March saw both −29.8°C (2003) and 22.4°C (2000), the widest span of any month.
Where Orillia’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the Canadian Climate Normals, 1991–2020, at Lagoon City (the closest location with all twelve months of 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: 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 Orillia’s climate
How warm does Orillia get in summer?
The year’s warmest days come in July, with highs averaging 24.5°C.
How cold does Orillia get in winter?
Winter bottoms out in January, with lows near −12.6°C.
How much rain and snow does Orillia get?
Around 1,062 mm a year in all, from 111 mm in October down to 56 mm in February.
Are these figures for Orillia itself?
They are the closest available: the normals for Lagoon City, since Orillia has none.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Orillia →
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).