Photo: P199 · Public domainThe climate in Millbrook sits close to the middle of Canadian towns
A typical January night drops to −12.8°C and a July afternoon reaches 26.6°C; 840 mm of rain and snow falls in a year. Its July heat outdoes that of 70% of Canadian towns. The wettest month is June; the driest is February. The heating season runs October to April: each of those months averages under 10°C.
Environment and Climate Change Canada’s 1991–2020 normals, measured at Peterborough, 8.2 km north-east.
A year in Millbrook at a glance
Each month’s typical high and low, in °C.
What stands out about Millbrook’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Millbrook feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
169 frost days and 121 days above 20°C a year
Frost comes from September to May; in January almost every night freezes. Deep cold, under −20°C, comes on about 15 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 840 mm of rain and snow a year
Some 114 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 158 cm in a normal year
Expect snow from October to April, with about 45 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 Millbrook
91% 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.
Living with Millbrook’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Gardens get from about 16 May to 24 September without frost, around 130 days in all.
Warm afternoons without cold nights, 17–27°C and 8°C or more, mark Jun, Jul and Aug.
Parks & trails →Count on some 29 days a year when the wind makes it feel below −20.
Count on some 54 humid days a year with the humidex past 30.
Ice storms, floods and heat waves are risks, not averages: they are on Millbrook’s hazards page.
Flood & hazards →ECCC’s normals location: Peterborough
Peterborough is a composite: ECCC joins 3 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 8.2 km north-east |
| Station altitude | 191 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −37.6°C |
| Hottest reading, 1991–2020 | 36.2°C |
| Average wind | 10.6 km/h on average, most often from the west |
| Next-nearest location | Cobourg, 32 km |
How Millbrook 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
Nearby places read from a different ECCC location (places on Millbrook’s own would show the same figures). No closer places have figures: these lie 22–36 km from Millbrook.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Millbrook Peterborough | 26.6°C | −12.8°C | 840 mm |
| Hamilton 22 km · Cobourg | 23.6°C 3.0°C cooler | −8.7°C 4.1°C milder | 840 mm |
| Bowmanville 36 km · Oshawa | 25.7°C 0.9°C cooler | −8.9°C 3.9°C milder | 906 mm |
Millbrook weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −2.6°C | −12.8°C | −7.6°C | 67 mm | 45 cm |
| February | −1.8°C | −12.8°C | −7.3°C | 42 mm | 27 cm |
| March | 4.1°C | −7.1°C | −1.5°C | 54 mm | 28 cm |
| April | 11.6°C | −0.3°C | 5.7°C | 73 mm | 7 cm |
| May | 19.3°C | 5.6°C | 12.5°C | 79 mm | 0 cm |
| June | 24.0°C | 10.7°C | 17.4°C | 88 mm | 0 cm |
| July | 26.6°C | 12.8°C | 19.7°C | 69 mm | 0 cm |
| August | 25.5°C | 11.7°C | 18.6°C | 78 mm | 0 cm |
| September | 21.4°C | 7.3°C | 14.4°C | 76 mm | 0 cm |
| October | 13.9°C | 2.0°C | 8.0°C | 75 mm | 1 cm |
| November | 6.6°C | −2.9°C | 1.9°C | 76 mm | 17 cm |
| December | 0.4°C | −8.3°C | −3.9°C | 64 mm | 33 cm |
| Year | 12.4°C | 0.5°C | 6.5°C | 840 mm | 158 cm |
From −31.4°C to 26.0°C: March’s coldest and warmest days since 1991
From one year to the next, January’s average typically shifts by 3.3°C around its normal of −7.6°C, the widest of any month, while June’s shifts by 1.1°C.
Where Millbrook’s numbers come from
Averages over 30 years, not a forecast.
- Normals: 1991–2020 normals for Peterborough from ECCC’s climate data site, the nearest location with every month of temperature.
- 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: hours of sunshine, missing from the 1991–2020 normals, and a height correction: the town has no elevation on file.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Millbrook’s climate
How warm does Millbrook get in summer?
A normal July afternoon tops out at about 26.6°C, the year’s high point.
How cold does Millbrook get in winter?
At its coldest, in January, the normal low is −12.8°C.
How much rain and snow does Millbrook get?
Around 840 mm a year in all, from 88 mm in June down to 42 mm in February.
How long does snow stay on the ground?
Expect snow on the ground, at least 1 cm, for about 99 days a year.
Are these figures for Millbrook itself?
Yes, measured at Peterborough, which sits inside Millbrook’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Millbrook →
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).