Nights turn raw in Carlow/Mayo each January, colder than in 81% of Canadian towns
On a normal July day the thermometer tops out near 25.7°C. It is a wet place: more rain and snow fall here than on 81% of Canadian towns. Temperatures cover 43°C across the year, low to high. Have the furnace checked before October to April, the months that average under 10°C.
The nearest ECCC normals location to Carlow/Mayo is Bancroft, 21 km south-west, and every figure on this page is its.
A year in Carlow/Mayo at a glance
Each month’s typical high and low, in °C.
What stands out about Carlow/Mayo’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Carlow/Mayo feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
Frost on 193 days, 20°C on 115
The frost season runs September to May, and January freezes nearly every night. On about 34 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
Rain and melted snow: about 1,106 mm a year
November brings the most rain and snow; February, the least. 5th wettest of 872 towns of 2,500+ in Ontario. On about 147 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Precipitation and snowfall: Haliburton, 70 km away (Bancroft records no complete year of either).
Snowfall: about 278 cm in a normal year
From October to May snow is likely; January is the peak, at about 67 cm.
Snowfall by month
Centimetres
Heating a home in Carlow/Mayo
89% 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. That means homes here need more heating than 62% of Canadian towns.
Living with Carlow/Mayo’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Afternoons of 17–27°C and nights of at least 8°C arrive in Jun, Jul and Aug.
Parks & trails →Count on some 29 days a year when the wind makes it feel below −20.
Summer brings about 36 days when the humidex passes 30.
For the weather that does damage, from ice storms to floods, see Carlow/Mayo’s hazards page.
Flood & hazards →ECCC’s normals location: Bancroft
Every temperature, frost, snow and degree-day figure on this page is the 1991–2020 normal ECCC publishes for Bancroft.
| Distance from the town | 21 km south-west |
| Station altitude | 331 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Precipitation from | Haliburton, 70 km |
| Coldest reading, 1991–2020 | −38.9°C |
| Hottest reading, 1991–2020 | 35.5°C |
| Average wind | 6.1 km/h on average, most often from the north |
| Next-nearest location | Haliburton, 70 km |
How Carlow/Mayo 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
The nearest places on a normals location of their own: those that share Carlow/Mayo’s would only repeat its figures. Carlow/Mayo has few close neighbours with figures, so the list reaches 48–64 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Carlow/Mayo Bancroft | 25.7°C | −17.1°C | 1,106 mm |
| Killaloe, Hagarty and Richards 48 km · Petawawa | 26.3°C 0.6°C warmer | −17.9°C 0.8°C colder | 932 mm |
| Highlands East 50 km · Haliburton | 25.3°C about the same | −16.0°C 1.1°C milder | 1,106 mm |
Carlow/Mayo 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 | −4.5°C | −17.1°C | −10.9°C | 98 mm | 67 cm |
| February | −2.1°C | −16.4°C | −9.3°C | 71 mm | 50 cm |
| March | 3.3°C | −10.4°C | −3.7°C | 76 mm | 36 cm |
| April | 10.5°C | −3.1°C | 3.7°C | 87 mm | 21 cm |
| May | 18.9°C | 3.3°C | 11.1°C | 92 mm | 2 cm |
| June | 23.1°C | 8.8°C | 16.0°C | 98 mm | 0 cm |
| July | 25.7°C | 11.0°C | 18.4°C | 91 mm | 0 cm |
| August | 24.5°C | 9.9°C | 17.3°C | 94 mm | 0 cm |
| September | 20.4°C | 5.9°C | 13.1°C | 99 mm | 0 cm |
| October | 12.5°C | 0.9°C | 6.7°C | 102 mm | 5 cm |
| November | 5.0°C | −4.9°C | 0.0°C | 103 mm | 33 cm |
| December | −1.6°C | −11.9°C | −6.9°C | 95 mm | 65 cm |
| Year | 11.3°C | −2.0°C | 4.6°C | 1,106 mm | 278 cm |
March: −34.2°C at its coldest, 27.1°C at its warmest
The month to count on least is January: one year in three its average strays more than 3.1°C from −10.9°C. June moves least, typically by 1.1°C.
Where Carlow/Mayo’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 normals from ECCC for Bancroft, its nearest location with complete temperatures.
- Other locations: a location missing months of precipitation or snow is filled from the nearest that has them all, never mixed month by month.
- Comparisons: Canada’s towns and neighbourhoods of 2,500+ (no city totals, no reserves), each through its own nearest 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 Carlow/Mayo’s climate
How warm does Carlow/Mayo get in summer?
Of all twelve months, July has the warmest afternoons, about 25.7°C.
How cold does Carlow/Mayo get in winter?
In January, the coldest month, the typical low is −17.1°C.
How much rain and snow does Carlow/Mayo get?
The yearly total is about 1,106 mm. November gets 103 mm, the most of any month; February gets 71 mm, the least.
Are these figures for Carlow/Mayo itself?
Not directly: Carlow/Mayo has no ECCC normals of its own, and Bancroft stands in for it.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Carlow/Mayo →
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).