Ice rarely forms: Central London sees fewer frosts than 75% of Canadian towns
Midsummer highs settle at about 26.6°C. Its July heat outdoes that of 70% of Canadian towns. September is the wettest month, February the driest. Garden chairs stay out from June to September, the months with highs of 22–27°C.
Environment and Climate Change Canada’s 1991–2020 normals at its London station, 9.1 km north-east.
A year in Central London at a glance
Each month’s typical high and low, in °C.
What stands out about Central London’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Central London feels like
Each season’s and each month’s usual high and low, 1991–2020.
139 frost days and 128 days above 20°C a year
Frost comes from October to May; in January almost every night freezes. Heat of 30°C or more comes on about 11 days a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 962 mm of rain and snow a year
Some 128 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
152 cm of snow in a typical year
Expect snow from October to April, with about 43 cm in January, the snowiest month.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Snowfall: Strathroy-Mullifarry, 33 km away (London records no complete year of it).
Heating a home in Central London
92% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
A heating degree day is one degree of shortfall below 18°C for one day, summed over the year. In heating terms, homes need less heating than 79% of Canadian towns.
Living with Central London’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Tender plants are usually safe from around 3 May until frost returns near 16 October: about 165 days.
The outdoor season by the averages is Jun, Jul, Aug and Sep, with highs of 17–27°C and lows of 8°C or more.
Parks & trails →Plan for about 18 days a year with a wind chill below −20.
Count on some 55 humid days a year with the humidex past 30.
For the weather that does damage, from ice storms to floods, see Central London’s hazards page.
Flood & hazards →ECCC’s normals location: London
ECCC builds the London normals from 3 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 9.1 km north-east |
| Station altitude | 278 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | Strathroy-Mullifarry, 33 km |
| Coldest reading, 1991–2020 | −29.1°C |
| Hottest reading, 1991–2020 | 37.0°C |
| Average wind | 14.0 km/h on average, most often from the west |
| Next-nearest location | Strathroy-Mullifarry, 33 km |
How Central London 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 Central London’s would only repeat its figures. The nearest places to Central London with figures are 22–40 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Central London London | 26.6°C | −9.1°C | 962 mm |
| Oneida 41 22 km · Strathroy-Mullifarry | 27.3°C 0.7°C warmer | −8.5°C 0.6°C milder | 966 mm |
| South-West Oxford 37 km · Delhi | 27.5°C 0.9°C warmer | −8.9°C about the same | 965 mm |
Central London weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −1.6°C | −9.1°C | −5.4°C | 79 mm | 43 cm |
| February | −0.6°C | −9.0°C | −4.8°C | 63 mm | 32 cm |
| March | 4.6°C | −4.5°C | 0.1°C | 67 mm | 20 cm |
| April | 12.2°C | 1.4°C | 6.8°C | 89 mm | 5 cm |
| May | 19.3°C | 7.7°C | 13.5°C | 89 mm | under 1 cm |
| June | 24.4°C | 13.2°C | 18.8°C | 86 mm | 0 cm |
| July | 26.6°C | 15.3°C | 21.0°C | 81 mm | 0 cm |
| August | 25.7°C | 14.4°C | 20.1°C | 67 mm | 0 cm |
| September | 22.1°C | 10.5°C | 16.3°C | 93 mm | 0 cm |
| October | 14.7°C | 5.0°C | 9.9°C | 83 mm | 2 cm |
| November | 7.5°C | −0.3°C | 3.6°C | 88 mm | 13 cm |
| December | 1.4°C | −5.2°C | −2.0°C | 79 mm | 37 cm |
| Year | 13.0°C | 3.3°C | 8.2°C | 962 mm | 152 cm |
February varies most from one year to the next (3.0°C), June least
Over 1991–2020, March saw both −25.6°C (2003) and 27.2°C (2012), the widest span of any month.
Where Central London’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the Canadian Climate Normals, 1991–2020, at London (the closest location with all twelve months of temperatures).
- Other locations: precipitation and snowfall come from the nearest location that publishes all twelve months of them, as named above.
- 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, not in ECCC’s 1991–2020 normals, and the effect of the town’s height, for which there is no figure.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Central London’s climate
How warm does Central London get in summer?
Highs reach 26.6°C on an average July day; no month is warmer.
How cold does Central London get in winter?
Of all twelve months, January has the coldest nights, about −9.1°C.
How much rain and snow does Central London get?
September is the wettest month at 93 mm and February the driest at 63 mm, for 962 mm over the year.
Are these figures for Central London itself?
Almost: ECCC’s London location, which gives these figures, lies a short way outside Central London.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Central London →
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).