Photo: Krisco75 · CC BY-SA 3.0More rain and snow fall on Ayer's Cliff than on 91% of Canadian towns: 1,217 mm a year
In January the night’s low is typically −13.9°C. June is the wettest month, February the driest. By July afternoons alone, it runs cooler than 66% of Canadian towns. Expect about 163 frosty starts a year, days when the air falls to freezing.
These are not Ayer's Cliff’s own readings: ECCC keeps no normals there, so the page uses Coaticook, 20 km east.
A year in Ayer's Cliff at a glance
Each month’s typical high and low, in °C.
What stands out about Ayer's Cliff’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Ayer's Cliff feels like
Each season’s and each month’s usual high and low, 1991–2020.
About 163 frosts and 103 warm days a year
Frost comes from September to May; in January almost every night freezes. Deep cold, under −20°C, comes on about 18 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 1,217 mm of rain and snow a year
Some 158 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 291 cm of snow a year
Snow falls from October to May, most of all in December (about 71 cm).
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Ayer's Cliff
91% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Behind the figure: the degrees each day’s mean falls under 18°C, summed for the year.
Living with Ayer's Cliff’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Count on about 133 frost-free days: the last frost averages 19 May, the first 30 September.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: Jun, Jul, Aug and Sep.
Parks & trails →A normal year has no blizzard, flood or heat wave in it; Ayer's Cliff’s hazards page looks at those.
Flood & hazards →ECCC’s normals location: Coaticook
Every temperature, frost, snow and degree-day figure on this page is the 1991–2020 normal ECCC publishes for Coaticook.
| Distance from the town | 20 km east |
| Station altitude | 259 m |
| Completeness | at least 15 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −35.5°C |
| Hottest reading, 1991–2020 | 33.0°C |
| Next-nearest location | Lennoxville, 28 km |
How Ayer's Cliff 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 Quebec.
Nearby towns’ climate
The nearest places on a normals location of their own: those that share Ayer's Cliff’s would only repeat its figures.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Ayer's Cliff Coaticook | 24.7°C | −13.9°C | 1,217 mm |
| Sainte-Catherine-de-Hatley 9.3 km · Lennoxville | 25.7°C 1.0°C warmer | −14.9°C 1.0°C colder | 1,015 mm |
| Stanstead 11 km · Coaticook | 24.7°C about the same | −13.9°C about the same | 1,217 mm |
Ayer's Cliff weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −4.8°C | −13.9°C | −9.5°C | 85 mm | 59 cm |
| February | −3.2°C | −12.8°C | −8.2°C | 74 mm | 61 cm |
| March | 2.0°C | −7.2°C | −2.7°C | 80 mm | 52 cm |
| April | 9.7°C | −0.1°C | 5.0°C | 90 mm | 15 cm |
| May | 17.7°C | 6.7°C | 12.1°C | 108 mm | 1 cm |
| June | 22.3°C | 11.8°C | 17.1°C | 130 mm | 0 cm |
| July | 24.7°C | 14.5°C | 19.4°C | 120 mm | 0 cm |
| August | 23.7°C | 13.5°C | 18.6°C | 120 mm | 0 cm |
| September | 19.5°C | 9.3°C | 14.4°C | 104 mm | 0 cm |
| October | 12.0°C | 3.5°C | 7.8°C | 110 mm | 5 cm |
| November | 4.9°C | −2.5°C | 1.4°C | 91 mm | 26 cm |
| December | −1.5°C | −9.2°C | −5.5°C | 106 mm | 71 cm |
| Year | 10.6°C | 1.1°C | 5.8°C | 1,217 mm | 291 cm |
From year to year, January moves by 3.1°C, more than any month, and August least
The thirty-year records stretch furthest in February: a low of −35.5°C in 1993 and a high of 18.9°C in 2018.
Where Ayer's Cliff’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Coaticook, 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 Ayer's Cliff’s climate
How warm does Ayer's Cliff get in summer?
At its warmest, in July, the normal high is 24.7°C.
How cold does Ayer's Cliff get in winter?
A typical January night falls to −13.9°C, the year’s low point.
How much rain and snow does Ayer's Cliff get?
Around 1,217 mm a year in all, from 130 mm in June down to 74 mm in February.
How long does snow stay on the ground?
About 125 days a year count as snow-covered, with 1 cm or more.
Are these figures for Ayer's Cliff itself?
Not directly: Ayer's Cliff has no ECCC normals of its own, and Coaticook stands in for it.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Ayer's Cliff →
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).