Wet weather: 1,271 mm of rain and snow a year falls on Rothesay, more than on 92% of Canadian towns
January nights here settle around −13.2°C. In July, afternoons here are cooler than in 90% of Canadian towns. The gap between a January night and a July afternoon is 36°C. Ice scrapers and block heaters earn their keep on roughly 170 days a year at 0°C or below.
ECCC publishes no normals for Rothesay itself; the figures are those of Saint John, 11 km south-east.
A year in Rothesay at a glance
Each month’s typical high and low, in °C.
What stands out about Rothesay’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in New Brunswick beside it.
What a year in Rothesay feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
170 frost days and 80 days above 20°C a year
From September to May frost is routine, and in January it comes on almost every night. On about 13 nights a year the air falls below −20°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 1,271 mm of rain and snow a year
November is the wettest month and August the driest. The wettest of 60 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
Rain alone by month
Millimetres
About 215 cm of snow a year
Expect snow from November to April, with about 60 cm in January, the snowiest month. 51st snowiest of 60 towns of 2,500+ in New Brunswick.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Rothesay
87% of a year’s heating need falls between October and April. Months averaging under 10°C: October to May.
Every day colder than 18°C on average adds its gap in degrees to the year’s heating total.
Living with Rothesay’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
A normal year gives the garden about 128 frost-free days, roughly 21 May to 27 September.
Plan time outside for Jun, Jul and Aug: highs of 17–27°C and nights no colder than 8°C.
Parks & trails →Expect around 37 days a year when the wind chill sinks below −20.
Muggy heat with a humidex over 30 arrives on about 12 days a year.
Storms, floods and heat waves sit outside these normals; Rothesay’s hazards page covers them.
Flood & hazards →ECCC’s normals location: Saint John
Saint John is a composite: ECCC joins 2 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 11 km south-east |
| Station altitude | 109 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −33.2°C |
| Hottest reading, 1991–2020 | 33.7°C |
| Average wind | 15.3 km/h on average, most often from the north |
| Next-nearest location | Sussex/Four Corners, 51 km |
How Rothesay 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
The nearest places on a normals location of their own: those that share Rothesay’s would only repeat its figures. No closer places have figures: these lie 26–48 km from Rothesay.
Rothesay weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −2.5°C | −13.2°C | −7.9°C | 116 mm | 60 cm |
| February | −1.6°C | −12.6°C | −7.1°C | 92 mm | 46 cm |
| March | 2.6°C | −7.7°C | −2.6°C | 107 mm | 37 cm |
| April | 8.8°C | −1.6°C | 3.7°C | 100 mm | 16 cm |
| May | 15.3°C | 3.5°C | 9.4°C | 94 mm | 1 cm |
| June | 20.0°C | 8.1°C | 14.1°C | 87 mm | 0 cm |
| July | 23.0°C | 11.6°C | 17.3°C | 90 mm | 0 cm |
| August | 23.0°C | 11.2°C | 17.1°C | 73 mm | 0 cm |
| September | 18.8°C | 7.4°C | 13.1°C | 109 mm | 0 cm |
| October | 13.0°C | 2.6°C | 7.9°C | 138 mm | 1 cm |
| November | 6.9°C | −2.0°C | 2.4°C | 138 mm | 13 cm |
| December | 1.3°C | −8.3°C | −3.5°C | 128 mm | 42 cm |
| Year | 10.7°C | −0.1°C | 5.3°C | 1,271 mm | 215 cm |
The most changeable month: January, give or take 2.5°C; the steadiest, August
Records from 1991 to 2020: no month spans more than March, between −28.4°C (2014) and 25.4°C (2012).
Where Rothesay’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 Canadian Climate Normals at Saint John, the closest ECCC location with twelve months of temperature normals.
- Comparisons: a pool of Canadian towns and neighbourhoods of 2,500 or more, read alike; whole cities and reserves stay out of it.
- Not on this page: sunshine, not in ECCC’s 1991–2020 normals, and the effect of the town’s height, for which there is no figure.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Rothesay’s climate
How warm does Rothesay get in summer?
The year’s warmest days come in July, with highs averaging 23.0°C.
How cold does Rothesay get in winter?
At its coldest, in January, the normal low is −13.2°C.
How much rain and snow does Rothesay get?
1,271 mm a year counting snow as water. The wettest month is November (138 mm); the driest, August (73 mm).
Are these figures for Rothesay itself?
They describe Saint John, the nearest normals location, rather than Rothesay itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Rothesay →
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).