Precipitation in Marlborough trails that of 82% of Canadian towns: 445 mm a year
Nights in January average −13.5°C. The gap between a January night and a July afternoon is 37°C. Its July afternoons stay fresher than in 80% of Canadian towns. The outdoor season, with highs of 23–24°C, runs through July and August.
Figures: ECCC’s 1991–2020 normals for Calgary (Airport) (7.1 km north-west).
A year in Marlborough at a glance
Each month’s typical high and low, in °C.
What stands out about Marlborough’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Alberta beside it.
What a year in Marlborough feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
Frost on 193 days, 20°C on 87
Frost comes from September to May; in December almost every night freezes. Deep cold, under −20°C, comes on about 22 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
445 mm of precipitation in a typical year
June is the wettest month and January the driest. Some 72 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 139 cm of snow a year
The snow season runs September to May; March brings the most, about 24 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Marlborough
85% 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. In heating terms, homes need more heating than 68% of Canadian towns.
Living with Marlborough’s climate
What the normals mean for a garden, a day outside and the depth of winter.
From about 21 May to 18 September the garden is usually clear of frost, some 119 days.
Highs of 17–27°C with nights of 8°C or more come in Jul and Aug.
Parks & trails →Winter brings about 42 days with a wind chill below −20.
On some 9 days a year the humidex climbs past 30.
Averages smooth over blizzards, ice storms, floods and heat waves; Marlborough’s hazards page covers the risks.
Flood & hazards →ECCC’s normals location: Calgary (Airport)
ECCC builds the Calgary (Airport) normals from 2 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 7.1 km north-west |
| Station altitude | 1,099 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −39.7°C |
| Hottest reading, 1991–2020 | 36.5°C |
| Average wind | 13.8 km/h on average, most often from the south |
| Next-nearest location | Queenstown, 86 km |
How Marlborough 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 Alberta.
Nearby towns’ climate
Nearby places read from a different ECCC location (places on Marlborough’s own would show the same figures). Marlborough has few close neighbours with figures, so the list reaches 52–67 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Marlborough Calgary (Airport) | 23.5°C | −13.5°C | 445 mm |
| Wheatland County 52 km · Queenstown | 25.0°C 1.5°C warmer | −13.7°C about the same | 412 mm |
| Carstairs 56 km · Sundre | 22.8°C 0.7°C cooler | −18.0°C 4.5°C colder | 496 mm |
| Stoney 142, 143, 144 63 km · Banff | 22.5°C 1.0°C cooler | −13.5°C about the same | 454 mm |
Marlborough weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −1.5°C | −13.5°C | −7.6°C | 10 mm | 17 cm |
| February | 0.1°C | −11.8°C | −5.9°C | 12 mm | 17 cm |
| March | 3.8°C | −8.1°C | −2.2°C | 18 mm | 24 cm |
| April | 10.8°C | −1.9°C | 4.5°C | 30 mm | 23 cm |
| May | 16.4°C | 3.4°C | 9.9°C | 61 mm | 10 cm |
| June | 19.7°C | 7.7°C | 13.7°C | 113 mm | under 1 cm |
| July | 23.5°C | 10.2°C | 16.9°C | 66 mm | 0 cm |
| August | 23.1°C | 9.2°C | 16.2°C | 54 mm | 0 cm |
| September | 18.3°C | 4.7°C | 11.5°C | 37 mm | 2 cm |
| October | 11.1°C | −1.3°C | 4.9°C | 17 mm | 12 cm |
| November | 4.1°C | −7.5°C | −1.7°C | 16 mm | 19 cm |
| December | −0.4°C | −12.1°C | −6.3°C | 13 mm | 16 cm |
| Year | 10.8°C | −1.8°C | 4.5°C | 445 mm | 139 cm |
From year to year, February moves by 4.1°C, more than any month, and June least
Over 1991–2020, December saw both −38.2°C (1996) and 19.5°C (1999), the widest span of any month.
Where Marlborough’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the closest ECCC location with twelve months of temperature normals, Calgary (Airport), 1991–2020.
- Comparisons: Canadian towns and neighbourhoods of at least 2,500, each placed by its nearest location (city totals and reserves excluded).
- Not on this page: sunshine, absent from every 1991–2020 location, and an altitude correction, for want of 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 Marlborough’s climate
How warm does Marlborough get in summer?
Summer peaks in July: a typical afternoon reaches 23.5°C.
How cold does Marlborough get in winter?
Midwinter means January, when a typical night reaches −13.5°C.
How much rain and snow does Marlborough get?
Count on roughly 445 mm a year, heaviest in June (113 mm) and lightest in January (10 mm).
How long does snow stay on the ground?
Around 93 days a year see 1 cm of snow or more lying.
Are these figures for Marlborough itself?
Almost: ECCC’s Calgary (Airport) location, which gives these figures, lies a short way outside Marlborough.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Marlborough →
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).