Photo: P199 · CC BY-SA 3.0Hardly any Canadian towns wake to more frost than Shuniah
Peak summer warmth arrives in July, with afternoons near 24.9°C. Rain and snow together come to less here than on 66% of Canadian towns. The year swings widely: the coldest month’s nights and the warmest month’s afternoons are 44°C apart. For walks and days out, July and August bring highs of 24–25°C.
These are not Shuniah’s own readings: ECCC keeps no normals there, so the page uses Thunder Bay, 28 km south-west.
A year in Shuniah at a glance
Each month’s typical high and low, in °C.
What stands out about Shuniah’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Shuniah feels like
Each season’s and each month’s usual high and low, 1991–2020.
About 206 frosts 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 42 nights a year.
Frost days by month
Average days at 0°C or below
790 mm of precipitation in a typical year
July brings the most rain and snow; February, the least. About 110 days a year bring 1 mm or more.
Rain and snow by month
Millimetres
Precipitation: Atikokan, 191 km away (Thunder Bay records no complete year of it).
Living with Shuniah’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Highs of 17–27°C with nights of 8°C or more come in Jul and Aug.
Parks & trails →Wind chill falls below −20 on about 68 days a year: cover skin and dress in layers.
Plan shade and water for about 26 days a year above 30 on the humidex.
Extremes don’t show in averages: floods, wildfire smoke and ice storms are on Shuniah’s hazards page.
Flood & hazards →ECCC’s normals location: Thunder Bay
Behind the 1991–2020 normals for Thunder Bay are 4 stations, which ECCC combines into one record.
| Distance from the town | 28 km south-west |
| Station altitude | 199 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Precipitation from | Atikokan, 191 km |
| Snowfall from | No location within 100 km |
| Coldest reading, 1991–2020 | −43.2°C |
| Hottest reading, 1991–2020 | 39.0°C |
| Average wind | 11.6 km/h on average, most often from the west |
| Next-nearest location | Atikokan, 191 km |
How Shuniah 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 Shuniah whose figures come from another normals location. The nearest place to Shuniah with figures is 132 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Shuniah Thunder Bay | 24.9°C | −19.2°C | 790 mm |
| Schreiber 132 km · Geraldton | 23.6°C 1.3°C cooler | −24.7°C 5.5°C colder | 762 mm |
Shuniah weather by month
Each month’s normals, 1991–2020: high, low, mean and precipitation.
| Month | High | Low | Mean | Rain & snow |
|---|---|---|---|---|
| January | −7.6°C | −19.2°C | −13.4°C | 33 mm |
| February | −5.2°C | −18.3°C | −11.8°C | 26 mm |
| March | 1.0°C | −11.8°C | −5.4°C | 34 mm |
| April | 8.9°C | −4.2°C | 2.4°C | 53 mm |
| May | 15.9°C | 1.9°C | 8.9°C | 80 mm |
| June | 21.6°C | 7.8°C | 14.8°C | 101 mm |
| July | 24.9°C | 11.0°C | 18.0°C | 117 mm |
| August | 24.2°C | 10.0°C | 17.1°C | 94 mm |
| September | 19.2°C | 5.5°C | 12.4°C | 102 mm |
| October | 10.9°C | −0.3°C | 5.3°C | 74 mm |
| November | 2.6°C | −6.7°C | −2.1°C | 40 mm |
| December | −4.5°C | −14.6°C | −9.6°C | 38 mm |
| Year | 9.3°C | −3.3°C | 3.0°C | 790 mm |
A February here can run warm or cold, its average moving by about 3.7°C; the steadiest month is June
Over 1991–2020, March saw both −34.7°C (1996) and 23.9°C (2010), the widest span of any month.
Where Shuniah’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 normals from ECCC for Thunder Bay, its nearest location with complete temperatures.
- 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: all Canadian places of 2,500 or more except city totals and reserves, each read the same way.
- Not on this page: snow, with no complete snowfall normals within 100 km, sunshine, which ECCC published for no location, and any height adjustment.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Shuniah’s climate
How warm does Shuniah get in summer?
At its warmest, in July, the normal high is 24.9°C.
How cold does Shuniah get in winter?
On a normal January night the air drops to −19.2°C, the coldest of the year.
How much rain and snow does Shuniah get?
The year adds up to 790 mm. July is the peak month (117 mm) and February the low one (26 mm).
Are these figures for Shuniah itself?
They describe Thunder Bay, the nearest normals location, rather than Shuniah itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Shuniah →
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).