Grand Manan has cooler summers than 93% of Canadian towns
In January the night’s low is typically −9.2°C. By precipitation alone, it ranks wetter than 83% of Canadian towns. The wettest month is October; the driest is August. Plan for rain or snow on about 109 days a year, the days with 1 mm or more.
Figures: ECCC’s 1991–2020 normals at Grand Manan (1.8 km north-west).
A year in Grand Manan at a glance
Each month’s typical high and low, in °C.
What stands out about Grand Manan’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in New Brunswick beside it.
What a year in Grand Manan feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
Frost on about 151 days a year
From September to May frost is routine, and in January it comes on almost every night.
Frost days by month
Average days at 0°C or below
About 1,125 mm of rain and snow a year
Rain and snow by month
Millimetres
ECCC’s Grand Manan normals leave precipitation out; the figures here come from Point Lepreau, 47 km away.
Snowfall: about 215 cm in a normal year
From November to April snow is likely; January is the peak, at about 60 cm. 51st snowiest of 60 towns of 2,500+ in New Brunswick.
Snowfall by month
Centimetres
Snowfall: Saint John, 98 km away (Grand Manan records no complete year of it).
Living with Grand Manan’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
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 →Frostbite weather, a wind chill under −20, turns up on about 20 days a year.
Muggy heat with a humidex over 30 arrives on about 17 days a year.
A normal year has no blizzard, flood or heat wave in it; Grand Manan’s hazards page looks at those.
Flood & hazards →ECCC’s normals location: Grand Manan
Grand Manan is one of the 450 places where ECCC publishes 1991–2020 normals.
| Distance from the town | 1.8 km north-west |
| Station altitude | 78 m |
| Completeness | at least 15 years |
| WMO standard normals | No |
| Precipitation from | Point Lepreau, 47 km |
| Snowfall from | Saint John, 98 km |
| Coldest reading, 1991–2020 | −26.3°C |
| Hottest reading, 1991–2020 | 32.9°C |
| Average wind | 13.2 km/h on average, most often from the west |
| Next-nearest location | Point Lepreau, 47 km |
How Grand Manan 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 New Brunswick.
Nearby towns’ climate
Places around Grand Manan whose figures come from another normals location. The nearest places to Grand Manan with figures are 42–48 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Grand Manan | 22.8°C | −9.2°C | 1,125 mm |
| Saint George 42 km · Point Lepreau | 19.9°C 2.9°C cooler | −9.5°C about the same | 1,125 mm |
| Saint Andrews 47 km · St. Stephen | 25.7°C 2.9°C warmer | −13.6°C 4.4°C colder | 1,125 mm |
Grand Manan 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 | −0.4°C | −9.2°C | −4.8°C | 82 mm | 60 cm |
| February | 0.3°C | −8.8°C | −4.3°C | 74 mm | 46 cm |
| March | 3.6°C | −5.0°C | −0.8°C | 94 mm | 37 cm |
| April | 9.1°C | 0.1°C | 4.6°C | 100 mm | 16 cm |
| May | 14.4°C | 4.4°C | 9.4°C | 96 mm | 1 cm |
| June | 19.3°C | 8.7°C | 14.0°C | 109 mm | 0 cm |
| July | 22.8°C | 12.4°C | 17.6°C | 76 mm | 0 cm |
| August | 23.0°C | 12.0°C | 17.5°C | 65 mm | 0 cm |
| September | 19.2°C | 8.4°C | 13.8°C | 99 mm | 0 cm |
| October | 13.3°C | 4.0°C | 8.7°C | 120 mm | 1 cm |
| November | 8.1°C | −0.2°C | 4.0°C | 103 mm | 13 cm |
| December | 2.8°C | −5.4°C | −1.3°C | 108 mm | 42 cm |
| Year | 11.3°C | 1.8°C | 6.5°C | 1,125 mm | 215 cm |
A March here can run from −23.0°C to 25.6°C
January is the least predictable month: about two years in three its average lands within 2.3°C of the normal, −4.8°C. August is the steadiest, within 0.8°C.
Where Grand Manan’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 Canadian Climate Normals at Grand Manan, the closest ECCC location with twelve months of temperature normals.
- Other locations: ECCC blanks a month that fails its completeness rule, so the precipitation or snowfall here comes from the next location with all twelve months.
- Comparisons: Canada’s towns and neighbourhoods of 2,500+ (no city totals, no reserves), each through its own nearest 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 Grand Manan’s climate
How warm does Grand Manan get in summer?
Summer peaks in August: a typical afternoon reaches 23.0°C.
How cold does Grand Manan get in winter?
Overnight lows average −9.2°C in January, the coldest month.
How much rain and snow does Grand Manan get?
Rain and snow, with snow counted as water, total 1,125 mm a year; October leads with 120 mm and August trails with 65 mm.
Are these figures for Grand Manan itself?
Yes, from ECCC’s station within Grand Manan’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Grand Manan →
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).