Photo: norgo · CC BY-SA 3.0Severn is wetter than 79% of Canadian towns: 1,062 mm of rain and snow a year
On a normal July day the thermometer tops out near 24.5°C. By frosts alone, it ranks gentler than 72% of Canadian towns. Winter and summer sit 37°C apart. An umbrella or a shovel earns its place on about 141 days a year with 1 mm or more.
Severn has no ECCC normals station of its own: every figure here comes from Lagoon City, 23 km south-east.
A year in Severn at a glance
Each month’s typical high and low, in °C.
What stands out about Severn’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Severn feels like
Each season’s and each month’s usual high and low, 1991–2020.
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 is the wettest month and February the driest.
Rain and snow by month
Millimetres
Precipitation: Muskoka, 36 km away (Lagoon City records no complete year of it).
Snowfall: about 167 cm in a normal year
Snow falls from October to April, most of all in January (about 42 cm).
Snowfall by month
Centimetres
ECCC’s Lagoon City normals leave snowfall out; the figures here come from Udora, 51 km away.
Heating a home in Severn
92% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
ECCC sums, over the year, how many degrees each day’s average falls short of 18°C.
Living with Severn’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: Jun, Jul, Aug and Sep.
Parks & trails →The wind chill passes −20 on about 37 days in a normal year.
On some 42 days a year the humidex climbs past 30.
Storms, floods and heat waves sit outside these normals; Severn’s hazards page covers them.
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 | 23 km south-east |
| Station altitude | 221 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Precipitation from | Muskoka, 36 km |
| Snowfall from | Udora, 51 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, 36 km |
How Severn 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
Nearby places read from a different ECCC location (places on Severn’s own would show the same figures). No closer places have figures: these lie 27–38 km from Severn.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Severn Lagoon City | 24.5°C | −12.6°C | 1,062 mm |
| Tay 27 km · Muskoka | 25.3°C 0.8°C warmer | −15.3°C 2.7°C colder | 1,062 mm |
| Springwater 35 km · Egbert | 26.0°C 1.5°C warmer | −11.3°C 1.3°C milder | 793 mm |
| Midland 35 km · Collingwood | 25.3°C 0.8°C warmer | −8.7°C 3.9°C milder | 1,062 mm |
Severn 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 | −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
March has the widest record range, −29.8°C in 2003 to 22.4°C in 2000; the tick on each bar is the month’s normal.
Where Severn’s numbers come from
Averages over 30 years, not a forecast.
- Normals: 1991–2020 normals for Lagoon City from ECCC’s climate data site, the nearest location with every month of temperature.
- 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: Canada’s towns and neighbourhoods of 2,500+ (no city totals, no reserves), each through its own nearest location.
- Not on this page: sunshine (no 1991–2020 normals exist for it) and any altitude adjustment, since there is no elevation for the town itself.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Severn’s climate
How warm does Severn get in summer?
Of all twelve months, July has the warmest afternoons, about 24.5°C.
How cold does Severn get in winter?
At its coldest, in January, the normal low is −12.6°C.
How much rain and snow does Severn get?
Over twelve months, rain and melted snow come to 1,062 mm; the range runs from 56 mm in February to 111 mm in October.
Are these figures for Severn itself?
No: Severn has no normals location, so the figures come from Lagoon City, the nearest with 1991–2020 normals.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Severn →
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).