Photo: P199 · CC BY-SA 3.0Precipitation in Georgian Bay tops that of 79% of Canadian towns: 1,062 mm a year
July afternoons average 25.3°C. The seasons are far apart: from a winter night to a summer afternoon the average spans 41°C. Its January nights bite harder than in 72% of Canadian towns. Homes need heating from October to April, the months averaging under 10°C.
These are not Georgian Bay’s own readings: ECCC keeps no normals there, so the page uses Muskoka, 40 km east.
A year in Georgian Bay at a glance
Each month’s typical high and low, in °C.
What stands out about Georgian Bay’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Georgian Bay feels like
Each season’s and each month’s usual high and low, 1991–2020.
175 frost days and 109 days above 20°C a year
From September to May frost is routine, and in January it comes on almost every night. Deep cold, under −20°C, comes on about 27 nights a year.
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. On about 141 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Snowfall: about 174 cm in a normal year
Expect snow from October to April, with about 42 cm in December, the snowiest month.
Snowfall by month
Centimetres
Muskoka publishes no full year of snowfall, so these figures come from Egbert, 85 km away.
Heating a home in Georgian Bay
90% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
A heating degree day is one degree of shortfall below 18°C for one day, summed over the year.
Living with Georgian Bay’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Warm afternoons without cold nights, 17–27°C and 8°C or more, mark Jun, Jul and Aug.
Parks & trails →For blizzards, floods and wildfire, turn to Georgian Bay’s hazards page.
Flood & hazards →ECCC’s normals location: Muskoka
ECCC builds the Muskoka normals from 3 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 40 km east |
| Station altitude | 282 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | Egbert, 85 km |
| Coldest reading, 1991–2020 | −40.0°C |
| Hottest reading, 1991–2020 | 35.2°C |
| Average wind | 10.7 km/h |
| Next-nearest location | Collingwood, 64 km |
How Georgian Bay 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 Georgian Bay’s would only repeat its figures. Georgian Bay has few close neighbours with figures, so the list reaches 26–46 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Georgian Bay Muskoka | 25.3°C | −15.3°C | 1,062 mm |
| Penetanguishene 26 km · Collingwood | 25.3°C about the same | −8.7°C 6.6°C milder | 1,062 mm |
| Severn 46 km · Lagoon City | 24.5°C 0.8°C cooler | −12.6°C 2.7°C milder | 1,062 mm |
Georgian Bay weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −4.6°C | −15.3°C | −10.0°C | 92 mm | 40 cm |
| February | −3.1°C | −15.1°C | −9.1°C | 56 mm | 33 cm |
| March | 2.5°C | −9.0°C | −3.3°C | 72 mm | 26 cm |
| April | 10.4°C | −1.6°C | 4.4°C | 79 mm | 9 cm |
| May | 18.4°C | 4.7°C | 11.5°C | 93 mm | under 1 cm |
| June | 23.1°C | 10.1°C | 16.7°C | 86 mm | 0 cm |
| July | 25.3°C | 12.8°C | 19.1°C | 100 mm | 0 cm |
| August | 24.4°C | 11.8°C | 18.1°C | 82 mm | 0 cm |
| September | 20.1°C | 7.5°C | 13.8°C | 102 mm | 0 cm |
| October | 12.5°C | 2.2°C | 7.4°C | 111 mm | 3 cm |
| November | 5.1°C | −3.4°C | 0.9°C | 103 mm | 22 cm |
| December | −1.0°C | −9.7°C | −5.4°C | 87 mm | 42 cm |
| Year | 11.1°C | −0.4°C | 5.3°C | 1,062 mm | 174 cm |
January varies most from one year to the next (3.3°C), June least
Each bar spans a month’s coldest and warmest readings over thirty years; March’s run from −31.9°C in 2003 to 26.7°C in 2012.
Where Georgian Bay’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the Canadian Climate Normals, 1991–2020, at Muskoka (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: every place of 2,500+ in Canada but the city hubs and the reserves, each on its nearest ECCC location.
- 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 Georgian Bay’s climate
How warm does Georgian Bay get in summer?
July is the warmest month, with average highs of 25.3°C.
How cold does Georgian Bay get in winter?
On a normal January night the air drops to −15.3°C, the coldest of the year.
How much rain and snow does Georgian Bay get?
The yearly total is about 1,062 mm. October gets 111 mm, the most of any month; February gets 56 mm, the least.
Are these figures for Georgian Bay itself?
Not exactly. Georgian Bay lacks a normals station, so Muskoka supplies the figures.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Georgian Bay →
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).