Photo: Paul Vincent Dimaranan · CC BY 3.0Frost comes to Carling less often than to 75% of Canadian towns
On a normal July day the thermometer tops out near 26.6°C. From frozen January to warm July, readings climb 36°C. In July, afternoons here are warmer than in 70% of Canadian towns. From June to September, highs of 22–27°C make it easy to spend the day outdoors.
1991–2020 normals from ECCC’s London location, 6.9 km east.
A year in Carling at a glance
Each month’s typical high and low, in °C.
What stands out about Carling’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Carling feels like
Each season’s and each month’s usual high and low, 1991–2020.
Frost on 139 days, 20°C on 128
The frost season runs October to May, and January freezes nearly every night. 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
Rain and melted snow: about 962 mm a year
September brings the most rain and snow; February, the least. On about 128 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
About 152 cm of snow a year
The snow season runs October to April; January brings the most, about 43 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
London publishes no full year of snowfall, so these figures come from Strathroy-Mullifarry, 35 km away.
Heating a home in Carling
92% 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. By this count, homes here need less heating than 79% of Canadian towns.
Living with Carling’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Count on about 165 frost-free days: the last frost averages 3 May, the first 16 October.
Afternoons of 17–27°C and nights of at least 8°C arrive in Jun, Jul, Aug and Sep.
Parks & trails →Plan for about 18 days a year with a wind chill below −20.
A humidex above 30 marks about 55 days in a normal year.
Ice storms, floods and heat waves are risks, not averages: they are on Carling’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 | 6.9 km east |
| Station altitude | 278 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | Strathroy-Mullifarry, 35 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, 35 km |
How Carling 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 Carling’s would only repeat its figures. Distances here run 25–39 km: that is how far the nearest places with figures are from Carling.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Carling London | 26.6°C | −9.1°C | 962 mm |
| Oneida 41 25 km · Strathroy-Mullifarry | 27.3°C 0.7°C warmer | −8.5°C 0.6°C milder | 966 mm |
| South-West Oxford 36 km · Delhi | 27.5°C 0.9°C warmer | −8.9°C about the same | 965 mm |
Carling 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 | −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 |
The most changeable month: February, give or take 3.0°C; the steadiest, June
March has the widest record range, −25.6°C in 2003 to 27.2°C in 2012; the tick on each bar is the month’s normal.
Where Carling’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for London, 1991–2020, chosen as the nearest location with a full temperature record.
- Other locations: precipitation and snowfall come from the nearest location that publishes all twelve months of them, as named above.
- 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, 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 Carling’s climate
How warm does Carling get in summer?
Afternoons average 26.6°C in July, the warmest time of year.
How cold does Carling get in winter?
Of all twelve months, January has the coldest nights, about −9.1°C.
How much rain and snow does Carling get?
The yearly total is about 962 mm. September gets 93 mm, the most of any month; February gets 63 mm, the least.
Are these figures for Carling itself?
Almost: ECCC’s London location, which gives these figures, lies a short way outside Carling.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Carling →
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).