Summer arrives in force in Deseronto, hotter than in 89% of Canadian towns
January mornings start at about −12.4°C. Rain or snow is most frequent in September and least in February. It is a wet place: more rain and snow fall here than on 67% of Canadian towns. Frost comes on about 154 days a year, so leave time to clear the car.
Deseronto has no ECCC normals station of its own: every figure here comes from Centreville, 25 km north-east.
A year in Deseronto at a glance
Each month’s typical high and low, in °C.
What stands out about Deseronto’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Deseronto feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
154 frost days and 124 days above 20°C a year
From October to May frost is routine, and in January it comes on almost every night. On about 13 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 984 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
Rain alone by month
Millimetres
158 cm of snow in a typical year
Snow falls from October to April, most of all in January (about 45 cm).
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Deseronto
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Measured against 18°C: each day’s shortfall in mean temperature, added over twelve months. Over a year, a home here needs less heating than 67% of Canadian towns.
Living with Deseronto’s climate
What the normals mean for a garden, a day outside and the depth of winter.
The outdoor season by the averages is Jun, Aug and Sep, with highs of 17–27°C and lows of 8°C or more.
Parks & trails →Storms, floods and heat waves sit outside these normals; Deseronto’s hazards page covers them.
Flood & hazards →ECCC’s normals location: Centreville
Every temperature, frost, snow and degree-day figure on this page is the 1991–2020 normal ECCC publishes for Centreville.
| Distance from the town | 25 km north-east |
| Station altitude | 150 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −37.0°C |
| Hottest reading, 1991–2020 | 37.5°C |
| Next-nearest location | Kingston, 36 km |
How Deseronto 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 Deseronto’s would only repeat its figures. The nearest places to Deseronto with figures are 9–29 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Deseronto Centreville | 27.2°C | −12.4°C | 984 mm |
| Tyendinaga Mohawk Territory 8.8 km · Trenton | 26.5°C 0.7°C cooler | −11.2°C 1.2°C milder | 941 mm |
| Loyalist 29 km · Kingston | 25.4°C 1.8°C cooler | −11.5°C 0.9°C milder | 984 mm |
Deseronto weather by month
Average daily high and low, mean temperature, rain and snow (as water) and snowfall by month, 1991–2020.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −2.9°C | −12.4°C | −7.7°C | 86 mm | 45 cm |
| February | −1.4°C | −11.6°C | −6.5°C | 61 mm | 34 cm |
| March | 4.1°C | −6.3°C | −1.4°C | 65 mm | 24 cm |
| April | 11.9°C | 0.8°C | 6.3°C | 88 mm | 7 cm |
| May | 19.6°C | 7.2°C | 13.4°C | 84 mm | under 1 cm |
| June | 24.4°C | 12.2°C | 18.4°C | 90 mm | 0 cm |
| July | 27.2°C | 14.9°C | 21.1°C | 68 mm | 0 cm |
| August | 26.2°C | 13.9°C | 20.1°C | 75 mm | 0 cm |
| September | 21.9°C | 9.9°C | 15.9°C | 100 mm | 0 cm |
| October | 14.1°C | 3.9°C | 9.0°C | 96 mm | 1 cm |
| November | 6.9°C | −1.7°C | 2.6°C | 88 mm | 12 cm |
| December | 0.4°C | −7.5°C | −3.6°C | 83 mm | 35 cm |
| Year | 12.7°C | 1.9°C | 7.3°C | 984 mm | 158 cm |
A January here can run warm or cold, its average moving by about 3.1°C; the steadiest month is June
Each bar spans a month’s coldest and warmest readings over thirty years; March’s run from −28.0°C in 2003 to 27.5°C in 2012.
Where Deseronto’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s 1991–2020 Canadian Climate Normals for Centreville, the nearest location with a full year of temperatures.
- Comparisons: all Canadian places of 2,500 or more except city totals and reserves, each read the same way.
- Not on this page: sunshine (no 1991–2020 normals exist for it) and any altitude adjustment, since there is no elevation for the town itself.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Deseronto’s climate
How warm does Deseronto get in summer?
Highs reach 27.2°C on an average July day; no month is warmer.
How cold does Deseronto get in winter?
Winter bottoms out in January, with lows near −12.4°C.
How much rain and snow does Deseronto get?
Precipitation totals 984 mm a year, with September the wettest month (100 mm) and February the driest (61 mm).
Are these figures for Deseronto itself?
They describe Centreville, the nearest normals location, rather than Deseronto itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Deseronto →
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).