A middle-of-the-road climate: Saint Mary is close to most Canadian towns on every count
January nights average −13.2°C, July afternoons 25.1°C, and a year brings 1,002 mm of rain and melted snow. Rain or snow is most frequent in October and least in February. Its yearly rain and snow top those of 68% of Canadian towns. Long walks are most pleasant from June to September, when afternoons reach 20–25°C.
ECCC publishes no normals for Saint Mary itself; the figures are those of Bouctouche, 6.1 km east.
A year in Saint Mary at a glance
Each month’s typical high and low, in °C.
What stands out about Saint Mary’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in New Brunswick beside it.
What a year in Saint Mary feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
About 166 frosts and 99 warm days a year
Frost comes from October to May; in January almost every night freezes. Deep cold, under −20°C, comes on about 13 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
1,002 mm of precipitation in a typical year
53rd wettest of 61 towns of 2,500+ in New Brunswick. Some 120 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
310 cm of snow in a typical year
Expect snow from October to May, with about 74 cm in January, the snowiest month.
Snowfall by month
Centimetres
ECCC’s Bouctouche normals leave snowfall out; the figures here come from Moncton, 37 km away.
Heating a home in Saint Mary
89% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Degree days add up how far each day’s mean temperature falls below 18°C over a year.
Living with Saint Mary’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Frost usually lets go around 14 May and returns near 3 October, about 141 days apart.
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 →Storms, floods and heat waves sit outside these normals; Saint Mary’s hazards page covers them.
Flood & hazards →ECCC’s normals location: Bouctouche
Behind the 1991–2020 normals for Bouctouche are 2 stations, which ECCC combines into one record.
| Distance from the town | 6.1 km east |
| Station altitude | 36 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | Moncton, 37 km |
| Coldest reading, 1991–2020 | −31.0°C |
| Hottest reading, 1991–2020 | 36.0°C |
| Next-nearest location | Moncton, 37 km |
How Saint Mary compares
Placed among 2,611 Canadian towns and neighbourhoods of 2,500+, each on its nearest normals location; each dot is another location used in New Brunswick.
Nearby towns’ climate
Places around Saint Mary whose figures come from another normals location. Saint Mary has few close neighbours with figures, so the list reaches 22–30 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Saint Mary Bouctouche | 25.1°C | −13.2°C | 1,002 mm |
| Richibucto 15 22 km · Kouchibougauac | 25.8°C 0.7°C warmer | −14.1°C 0.9°C colder | 1,240 mm |
| Moncton 27 km · Moncton | 25.1°C about the same | −13.3°C about the same | 1,203 mm |
Saint Mary weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −3.4°C | −13.2°C | −8.3°C | 72 mm | 74 cm |
| February | −2.3°C | −12.7°C | −7.5°C | 59 mm | 65 cm |
| March | 2.0°C | −7.5°C | −2.8°C | 79 mm | 60 cm |
| April | 8.3°C | −1.3°C | 3.5°C | 69 mm | 29 cm |
| May | 15.7°C | 4.5°C | 10.2°C | 93 mm | 2 cm |
| June | 21.3°C | 10.2°C | 15.8°C | 82 mm | 0 cm |
| July | 25.1°C | 14.2°C | 19.7°C | 89 mm | 0 cm |
| August | 24.6°C | 13.4°C | 19.1°C | 74 mm | 0 cm |
| September | 20.2°C | 9.1°C | 14.7°C | 101 mm | 0 cm |
| October | 13.1°C | 3.4°C | 8.3°C | 106 mm | 2 cm |
| November | 6.3°C | −2.0°C | 2.2°C | 92 mm | 19 cm |
| December | 0.0°C | −8.3°C | −4.1°C | 86 mm | 59 cm |
| Year | 10.9°C | 0.8°C | 5.9°C | 1,002 mm | 310 cm |
A March here can run from −27.0°C to 26.0°C
Bars run from each month’s record low to its record high over 1991–2020; February is the month whose average wanders most from year to year (±2.5°C around −7.5°C), August the one that wanders least (±0.9°C).
Where Saint Mary’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 normals from ECCC for Bouctouche, its nearest location with complete temperatures.
- 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: the towns and neighbourhoods of 2,500+ across Canada, each on its nearest normals location, without the city totals or the reserves.
- Not on this page: a sunshine figure (ECCC published none for 1991–2020) and any lapse-rate correction for height, as the town has no elevation here.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Saint Mary’s climate
How warm does Saint Mary get in summer?
Of all twelve months, July has the warmest afternoons, about 25.1°C.
How cold does Saint Mary get in winter?
In January, the coldest month, the typical low is −13.2°C.
How much rain and snow does Saint Mary get?
Count on roughly 1,002 mm a year, heaviest in October (106 mm) and lightest in February (59 mm).
Are these figures for Saint Mary itself?
They come from Bouctouche, which ECCC uses as the nearest normals location for Saint Mary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Saint Mary →
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).