Summer arrives in force in Alloa, hotter than in 95% of Canadian towns
Midwinter brings lows of about −8.9°C. Only about 131 nights a year bring a frost, fewer than in 82% of Canadian towns. The wettest month is June; the driest is February. Heating does most of its work from November to April, in months below 10°C on average.
Borrowed figures: Alloa has no normals station, so these come from Toronto Pearson (Airport), 18 km east.
A year in Alloa at a glance
Each month’s typical high and low, in °C.
What stands out about Alloa’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Alloa feels like
Each season’s and each month’s usual high and low, 1991–2020.
131 frost days and 125 days above 20°C a year
Frost comes from October to April; in January almost every night freezes. About 17 days a year top 30°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 807 mm a year
On about 106 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
115 cm of snow in a typical year
Snow falls from November to April, most of all in January (about 32 cm).
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Alloa
93% of a year’s heating need falls between October and April. Months averaging under 10°C: November to April.
The total grows by a degree for every degree a day’s mean sits under 18°C. Homes here need less heating than 83% of Canadian towns.
Living with Alloa’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
The frost-free stretch runs from about 27 April to about 20 October, some 174 days in a normal year.
The outdoor season by the averages is May, Jun, Aug and Sep, with highs of 17–27°C and lows of 8°C or more.
Parks & trails →The wind chill passes −20 on about 21 days in a normal year.
On some 56 days a year the humidex climbs past 30.
A typical year is calm by definition; Alloa’s hazards page covers the exceptions.
Flood & hazards →ECCC’s normals location: Toronto Pearson (Airport)
ECCC builds the Toronto Pearson (Airport) normals from 2 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 18 km east |
| Station altitude | 173 m |
| Completeness | at least 25 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −31.0°C |
| Hottest reading, 1991–2020 | 37.9°C |
| Average wind | 15.7 km/h on average, most often from the west |
| Next-nearest location | Toronto (City), 36 km |
How Alloa 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 Alloa’s would only repeat its figures. Alloa has few close neighbours with figures, so the list reaches 20–30 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Alloa Toronto Pearson (Airport) | 27.4°C | −8.9°C | 807 mm |
| Erin 20 km · Elora | 25.4°C 2.0°C cooler | −10.7°C 1.8°C colder | 807 mm |
| Milton 21 km · Burlington Piers | 25.5°C 1.9°C cooler | −6.3°C 2.6°C milder | 807 mm |
| Vaughan 30 km · Toronto Buttonville (Airport) | 27.3°C about the same | −10.1°C 1.2°C colder | 862 mm |
Alloa 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 | −1.2°C | −8.9°C | −5.0°C | 62 mm | 32 cm |
| February | −0.3°C | −8.5°C | −4.4°C | 50 mm | 28 cm |
| March | 5.0°C | −3.8°C | 0.6°C | 51 mm | 17 cm |
| April | 12.0°C | 1.9°C | 7.0°C | 77 mm | 5 cm |
| May | 19.2°C | 8.2°C | 13.7°C | 78 mm | under 1 cm |
| June | 24.5°C | 13.9°C | 19.2°C | 81 mm | 0 cm |
| July | 27.4°C | 16.6°C | 22.1°C | 74 mm | 0 cm |
| August | 26.3°C | 15.8°C | 21.1°C | 69 mm | 0 cm |
| September | 22.3°C | 11.6°C | 16.9°C | 69 mm | 0 cm |
| October | 14.6°C | 5.3°C | 10.0°C | 67 mm | under 1 cm |
| November | 7.9°C | 0.2°C | 4.1°C | 72 mm | 9 cm |
| December | 1.9°C | −5.0°C | −1.6°C | 59 mm | 24 cm |
| Year | 13.3°C | 3.9°C | 8.6°C | 807 mm | 115 cm |
January strays furthest from its normal year to year, by 3.0°C; June the least
Bars run from each month’s record low to its record high since 1991. March spans the most, from −24.7°C (2003) to 26.0°C (2012).
Where Alloa’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Toronto Pearson (Airport), 1991–2020, chosen as the nearest location with a full temperature record.
- 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 (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 Alloa’s climate
How warm does Alloa get in summer?
The warmest month is July, when afternoons average 27.4°C.
How cold does Alloa get in winter?
January nights average −8.9°C, the coldest of the year.
How much rain and snow does Alloa get?
Precipitation totals 807 mm a year, with June the wettest month (81 mm) and February the driest (50 mm).
How long does snow stay on the ground?
On about 69 days a year the ground keeps at least 1 cm of snow.
Are these figures for Alloa itself?
No, they come from Toronto Pearson (Airport); ECCC keeps no 1991–2020 normals in Alloa itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Alloa →
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).