Summer afternoons in Greenboro East are warmer than in 86% of Canadian towns
The depth of winter brings overnight lows near −14.3°C. From frozen January to warm July, readings climb 41°C. In January, nights here are colder than in 61% of Canadian towns. About 118 days a year bring 1 mm of precipitation or more.
Environment and Climate Change Canada’s 1991–2020 normals at its Ottawa (Airport) station, 6.2 km south-west.
A year in Greenboro East at a glance
Each month’s typical high and low, in °C.
What stands out about Greenboro East’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Greenboro East feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
154 frost days and 120 days above 20°C a year
From October to April frost is routine, and in January it comes on almost every night. 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
930 mm of precipitation in a typical year
The most falls in June, the least in February.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 232 cm in a normal year
Expect snow from October to April, with about 59 cm in January, the snowiest month.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Greenboro East
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Degree days add up how far each day’s mean temperature falls below 18°C over a year.
Living with Greenboro East’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Between the last frost, near 29 April, and the first, near 7 October, lie about 160 frost-free days.
Mild days and mild nights together (17–27°C by day, 8°C or more at night) belong to Jun, Jul, Aug and Sep.
Parks & trails →Frostbite weather, a wind chill under −20, turns up on about 47 days a year.
Muggy heat with a humidex over 30 arrives on about 49 days a year.
Severe weather is a separate story from the averages: see Greenboro East’s hazards page.
Flood & hazards →ECCC’s normals location: Ottawa (Airport)
Ottawa (Airport) is a composite: ECCC joins 2 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 6.2 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), 7.4 km |
How Greenboro East 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
The nearest places on a normals location of their own: those that share Greenboro East’s would only repeat its figures. Distances here run 6–28 km: that is how far the nearest places with figures are from Greenboro East.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Greenboro East Ottawa (Airport) | 27.0°C | −14.3°C | 930 mm |
| Ottawa 6.3 km · Ottawa (City) | 26.7°C about the same | −14.0°C about the same | 938 mm |
| Cantley 23 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 East weather by month
Month by month, 1991–2020: the usual high, low and mean, the rain and snow, and the 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 |
A March here can run from −29.0°C to 27.4°C
January is the least predictable month: about two years in three its average lands within 3.2°C of the normal, −10.0°C. August is the steadiest, within 1.1°C.
Where Greenboro East’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the Canadian Climate Normals, 1991–2020, at Ottawa (Airport) (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: 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 East’s climate
How warm does Greenboro East get in summer?
July is the warmest month, with average highs of 27.0°C.
How cold does Greenboro East get in winter?
The year’s coldest nights belong to January, at about −14.3°C.
How much rain and snow does Greenboro East get?
Precipitation totals 930 mm a year, with June the wettest month (97 mm) and February the driest (50 mm).
How long does snow stay on the ground?
About 118 days a year have 1 cm of snow or more on the ground.
Are these figures for Greenboro East itself?
Close to it: they are ECCC’s 1991–2020 normals for Ottawa (Airport), just outside Greenboro East’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Greenboro East →
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).