Greenboro West has warmer summer afternoons than 86% of Canadian towns
January mornings start at about −14.3°C. Rain or snow is most frequent in June and least in February. Winter nights are cold: in January they are colder than in 61% of Canadian towns. For walks and days out, the stretch from June to September brings highs of 21–27°C.
Figures: ECCC’s 1991–2020 normals for Ottawa (Airport) (5.2 km south-west).
A year in Greenboro West at a glance
Each month’s typical high and low, in °C.
What stands out about Greenboro West’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Greenboro West feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
Frost on 154 days, 20°C on 120
Frost comes from October to April; in January almost every night freezes. On about 16 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 930 mm of rain and snow a year
Some 118 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 232 cm in a normal year
Snow falls from October to April, most of all in January (about 59 cm).
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Greenboro West
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
The count adds up, day by day, how far the mean temperature falls short of 18°C.
Living with Greenboro West’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
The frost-free stretch runs from about 29 April to about 7 October, some 160 days in a normal year.
Warm afternoons without cold nights, 17–27°C and 8°C or more, mark Jun, Jul, Aug and Sep.
Parks & trails →Roughly 47 days a year feel colder than −20 in the wind.
Humid summer days, the humidex above 30, number about 49 a year.
For the weather that does damage, from ice storms to floods, see Greenboro West’s hazards page.
Flood & hazards →ECCC’s normals location: Ottawa (Airport)
ECCC builds the Ottawa (Airport) normals from 2 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 5.2 km south-west |
| Station altitude | 114 m |
| Completeness | at least 25 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −33.1°C |
| Hottest reading, 1991–2020 | 36.9°C |
| Average wind | 13.5 km/h on average, most often from the west |
| Next-nearest location | Ottawa (City), 6.7 km |
How Greenboro West 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
Places around Greenboro West whose figures come from another normals location. The nearest places to Greenboro West with figures are 5–28 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Greenboro West Ottawa (Airport) | 27.0°C | −14.3°C | 930 mm |
| Ottawa 5.4 km · Ottawa (City) | 26.7°C about the same | −14.0°C about the same | 938 mm |
| Cantley 24 km · Angers | 26.2°C 0.8°C cooler | −16.5°C 2.2°C colder | 938 mm |
| Chelsea 25 km · Luskville | 26.9°C about the same | −16.0°C 1.7°C colder | 968 mm |
Greenboro West weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −5.5°C | −14.3°C | −10.0°C | 70 mm | 59 cm |
| February | −3.6°C | −13.2°C | −8.5°C | 50 mm | 49 cm |
| March | 2.4°C | −7.1°C | −2.4°C | 66 mm | 39 cm |
| April | 11.3°C | 0.5°C | 5.9°C | 81 mm | 12 cm |
| May | 19.6°C | 7.5°C | 13.6°C | 75 mm | under 1 cm |
| June | 24.4°C | 12.9°C | 18.7°C | 97 mm | 0 cm |
| July | 27.0°C | 15.4°C | 21.2°C | 89 mm | 0 cm |
| August | 25.8°C | 14.3°C | 20.1°C | 79 mm | 0 cm |
| September | 21.0°C | 9.6°C | 15.3°C | 90 mm | 0 cm |
| October | 13.0°C | 3.4°C | 8.2°C | 87 mm | 3 cm |
| November | 5.8°C | −2.4°C | 1.7°C | 74 mm | 21 cm |
| December | −1.9°C | −9.6°C | −5.8°C | 72 mm | 50 cm |
| Year | 11.6°C | 1.4°C | 6.5°C | 930 mm | 232 cm |
In March, anything from −29.0°C to 27.4°C
Bars run from each month’s record low to its record high over 1991–2020; January is the month whose average wanders most from year to year (±3.2°C around −10.0°C), August the one that wanders least (±1.1°C).
Where Greenboro West’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 Canadian Climate Normals at Ottawa (Airport), the closest ECCC location with twelve months of temperature normals.
- Comparisons: all Canadian places of 2,500 or more except city totals and reserves, each read the same way.
- 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 Greenboro West’s climate
How warm does Greenboro West get in summer?
A normal July afternoon tops out at about 27.0°C, the year’s high point.
How cold does Greenboro West get in winter?
January nights average −14.3°C, the coldest of the year.
How much rain and snow does Greenboro West get?
Rain and snow, with snow counted as water, total 930 mm a year; June leads with 97 mm and February trails with 50 mm.
How long does snow stay on the ground?
There is 1 cm of snow or more on the ground on roughly 118 days a year.
Are these figures for Greenboro West itself?
Almost: ECCC’s Ottawa (Airport) location, which gives these figures, lies a short way outside Greenboro West.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Greenboro West →
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).