Photo: Andre Carrotflower · CC BY-SA 4.0Terrace Bay has some of the coldest winter nights among Canadian towns
Midsummer highs settle at about 23.6°C. By July afternoons alone, it runs cooler than 72% of Canadian towns. From frozen January to warm July, readings climb 48°C. Ice scrapers and block heaters earn their keep on roughly 214 days a year at 0°C or below.
The nearest ECCC normals location is Geraldton, 112 km north: at that distance its figures describe the region more than Terrace Bay itself.
A year in Terrace Bay at a glance
Each month’s typical high and low, in °C.
What stands out about Terrace Bay’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Terrace Bay feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
Frost on 214 days, 20°C on 83
Frost comes from September to May; in January almost every night freezes. On about 71 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
About 762 mm of rain and snow a year
The most falls in July, the least in February. 865th wettest of 872 towns of 2,500+ in Ontario. On about 114 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Heating a home in Terrace Bay
88% of a year’s heating need falls between October and April. Months averaging under 10°C: October to May.
Each day the mean sits under 18°C adds its shortfall; a year’s total is its heating degree days. That means homes here need more heating than almost every Canadian town.
Living with Terrace Bay’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Count on about 106 frost-free days: the last frost averages 31 May, the first 16 September.
Mild days and mild nights together (17–27°C by day, 8°C or more at night) belong to Jun, Jul and Aug.
Parks & trails →Bitter wind chill, under −20, comes on about 90 days a year.
The air feels heavier than 30 on the humidex for about 17 days a year.
Averages smooth over blizzards, ice storms, floods and heat waves; Terrace Bay’s hazards page covers the risks.
Flood & hazards →ECCC’s normals location: Geraldton
ECCC builds the Geraldton normals from 2 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 112 km north |
| Station altitude | 348 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | No location within 100 km |
| Coldest reading, 1991–2020 | −50.2°C |
| Hottest reading, 1991–2020 | 37.0°C |
| Average wind | 11.4 km/h on average, most often from the west |
| Next-nearest location | Thunder Bay, 170 km |
How Terrace Bay 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 Terrace Bay whose figures come from another normals location. No closer place has figures: this one lies 89 km from Terrace Bay.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Terrace Bay Geraldton | 23.6°C | −24.7°C | 762 mm |
| Nipigon 89 km · Thunder Bay | 24.9°C 1.3°C warmer | −19.2°C 5.5°C milder | 762 mm |
Terrace Bay weather by month
Each month’s normals, 1991–2020: high, low, mean and precipitation.
| Month | High | Low | Mean | Rain & snow |
|---|---|---|---|---|
| January | −12.2°C | −24.7°C | −18.5°C | 36 mm |
| February | −8.8°C | −23.4°C | −16.1°C | 26 mm |
| March | −1.3°C | −16.1°C | −8.7°C | 33 mm |
| April | 6.6°C | −6.7°C | 0.0°C | 49 mm |
| May | 15.2°C | 1.6°C | 8.4°C | 78 mm |
| June | 21.4°C | 8.0°C | 14.7°C | 82 mm |
| July | 23.6°C | 11.1°C | 17.4°C | 108 mm |
| August | 22.3°C | 9.9°C | 16.1°C | 76 mm |
| September | 16.5°C | 5.2°C | 10.9°C | 102 mm |
| October | 7.6°C | −0.8°C | 3.4°C | 84 mm |
| November | −1.0°C | −9.3°C | −5.1°C | 53 mm |
| December | −8.3°C | −18.3°C | −13.3°C | 37 mm |
| Year | 6.8°C | −5.3°C | 0.8°C | 762 mm |
The month with the widest range: March, −40.0°C to 20.7°C
Bars run from each month’s record low to its record high over 1991–2020; February is the month whose average wanders most from year to year (±3.7°C around −16.1°C), August the one that wanders least (±1.3°C).
Where Terrace Bay’s numbers come from
Averages over 30 years, not a forecast.
- Normals: Environment and Climate Change Canada’s 1991–2020 normals, Geraldton: the nearest of its locations with every month’s temperatures.
- Comparisons: Canada’s towns and neighbourhoods of 2,500+ (no city totals, no reserves), each through its own nearest location.
- Not on this page: a snowfall figure (none within 100 km), sunshine (none for 1991–2020) and 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 Terrace Bay’s climate
How warm does Terrace Bay get in summer?
Expect highs near 23.6°C in July, the hottest month on average.
How cold does Terrace Bay get in winter?
Lows sink to −24.7°C on an average January night.
How much rain and snow does Terrace Bay get?
Precipitation totals 762 mm a year, with July the wettest month (108 mm) and February the driest (26 mm).
Are these figures for Terrace Bay itself?
No: they come from Geraldton, the nearest ECCC normals location, and far enough away to describe the wider area more than Terrace Bay.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Terrace 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).