Photo: P199 · Public domainHardly any Canadian towns see harsher January nights than Armstrong
In July the day’s top temperature is typically 24.8°C. By precipitation alone, it ranks drier than 67% of Canadian towns. The year is lopsided: September gets about 2.9 times what February does. An umbrella or a shovel earns its place on about 117 days a year with 1 mm or more.
Figures: ECCC’s 1991–2020 normals at Earlton (1.6 km south-west).
A year in Armstrong at a glance
Each month’s typical high and low, in °C.
What stands out about Armstrong’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Armstrong feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
195 frost days and 96 days above 20°C a year
Frost comes from September to May; in January almost every night freezes. Some 49 nights a year drop under −20°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
740 mm of precipitation in a typical year
869th wettest of 872 towns of 2,500+ in Ontario.
Rain and snow by month
Millimetres
Heating a home in Armstrong
89% 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. Over a year, a home here needs more heating than 84% of Canadian towns.
Living with Armstrong’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Gardens get from about 27 May to 20 September without frost, around 115 days in all.
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 →About 81 days a year bring a wind chill under −20, when bare skin chills fast.
Humid heat, a humidex over 30, comes on about 29 days a year.
For the weather that does damage, from ice storms to floods, see Armstrong’s hazards page.
Flood & hazards →ECCC’s normals location: Earlton
Behind the 1991–2020 normals for Earlton are 4 stations, which ECCC combines into one record.
| Distance from the town | 1.6 km south-west |
| Station altitude | 244 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | No location within 100 km |
| Coldest reading, 1991–2020 | −44.7°C |
| Hottest reading, 1991–2020 | 37.2°C |
| Average wind | 14.0 km/h on average, most often from the north-west |
| Next-nearest location | Kirkland Lake, 50 km |
How Armstrong compares
Placed among 2,611 Canadian towns and neighbourhoods of 2,500+, each on its nearest normals location; each dot is another location used in Ontario.
Nearby towns’ climate
The nearest places on a normals location of their own: those that share Armstrong’s would only repeat its figures. Distances here run 29–115 km: that is how far the nearest places with figures are from Armstrong.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Armstrong Earlton | 24.8°C | −21.4°C | 740 mm |
| Timiskaming, Unorganized, West Part 29 km · Kirkland Lake | 24.0°C 0.8°C cooler | −21.9°C 0.5°C colder | 787 mm |
| Rouyn-Noranda 83 km · Rouyn | 23.7°C 1.1°C cooler | −20.1°C 1.3°C milder | 787 mm |
Armstrong weather by month
Each month’s normals, 1991–2020: high, low, mean and precipitation.
| Month | High | Low | Mean | Rain & snow |
|---|---|---|---|---|
| January | −9.7°C | −21.4°C | −15.6°C | 43 mm |
| February | −7.2°C | −20.2°C | −13.7°C | 31 mm |
| March | −0.4°C | −12.9°C | −6.6°C | 42 mm |
| April | 8.0°C | −3.5°C | 2.3°C | 58 mm |
| May | 17.5°C | 3.8°C | 10.6°C | 68 mm |
| June | 22.7°C | 9.3°C | 16.0°C | 78 mm |
| July | 24.8°C | 12.0°C | 18.4°C | 85 mm |
| August | 23.3°C | 10.7°C | 17.0°C | 71 mm |
| September | 18.4°C | 6.2°C | 12.3°C | 88 mm |
| October | 10.1°C | 0.7°C | 5.4°C | 77 mm |
| November | 1.9°C | −6.1°C | −2.1°C | 57 mm |
| December | −5.2°C | −14.6°C | −9.9°C | 43 mm |
| Year | 8.7°C | −3.0°C | 2.8°C | 740 mm |
The month with the widest range: March, −36.6°C to 25.4°C
Two years in three, January’s average falls within 3.6°C of its normal of −15.6°C; July keeps to within 1.2°C.
Where Armstrong’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the Canadian Climate Normals, 1991–2020, at Earlton (the closest location with all twelve months of temperatures).
- 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: snowfall (no location within 100 km publishes a full year of it), sunshine (none for 1991–2020) and an altitude correction.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Armstrong’s climate
How warm does Armstrong get in summer?
The year’s warmest days come in July, with highs averaging 24.8°C.
How cold does Armstrong get in winter?
Of all twelve months, January has the coldest nights, about −21.4°C.
How much rain and snow does Armstrong get?
Over twelve months, rain and melted snow come to 740 mm; the range runs from 31 mm in February to 88 mm in September.
Are these figures for Armstrong itself?
Yes, measured at Earlton, which sits inside Armstrong’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Armstrong →
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).