Photo: Earth Science and Remote Sensing Unit , Lyndon B. Johnson Space Center · Public domainMore rain and snow fall on Sussex than on 84% of Canadian towns: 1,152 mm a year
Peak summer warmth arrives in July, with afternoons near 25.7°C. The wettest month is January; the driest is August. Wet days, with 1 mm of rain or snow or more, come about 129 times a year.
1991–2020 normals from ECCC’s Sussex/Four Corners location, 7.6 km north.
A year in Sussex at a glance
Each month’s typical high and low, in °C.
What stands out about Sussex’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in New Brunswick beside it.
What a year in Sussex feels like
Each season’s and each month’s usual high and low, 1991–2020.
About 166 frosts and 108 warm days a year
From September to May frost is routine, and in January it comes on almost every night. Deep cold, under −20°C, comes on about 12 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 1,152 mm of rain and snow a year
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 248 cm of snow a year
Expect snow from November to May, with about 66 cm in January, the snowiest month.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Sussex
90% 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 Sussex’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Plant out after about 20 May; the first frost of autumn usually arrives near 26 September, leaving roughly 128 days without frost.
Afternoons of 17–27°C and nights of at least 8°C arrive in Jun, Jul, Aug and Sep.
Parks & trails →The normals describe a typical year, not its worst days; the hazards page covers Sussex’s.
Flood & hazards →ECCC’s normals location: Sussex/Four Corners
Sussex/Four Corners is a composite: ECCC joins 2 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 7.6 km north |
| Station altitude | 21 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −34.0°C |
| Hottest reading, 1991–2020 | 35.0°C |
| Next-nearest location | Alma/Fundy Park, 43 km |
How Sussex compares
Compared with 2,611 towns and neighbourhoods of 2,500 or more across Canada; the dots mark the other normals locations in New Brunswick.
Nearby towns’ climate
The nearest places on a normals location of their own: those that share Sussex’s would only repeat its figures. Distances here run 22–38 km: that is how far the nearest places with figures are from Sussex.
Sussex 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 | −2.5°C | −13.2°C | −7.9°C | 116 mm | 66 cm |
| February | −0.9°C | −12.1°C | −6.5°C | 82 mm | 46 cm |
| March | 3.4°C | −6.6°C | −1.6°C | 109 mm | 51 cm |
| April | 10.2°C | −0.5°C | 4.9°C | 81 mm | 19 cm |
| May | 17.3°C | 4.8°C | 11.1°C | 90 mm | 2 cm |
| June | 22.6°C | 10.1°C | 16.4°C | 90 mm | 0 cm |
| July | 25.7°C | 13.7°C | 19.7°C | 71 mm | 0 cm |
| August | 25.3°C | 12.8°C | 19.1°C | 64 mm | 0 cm |
| September | 20.8°C | 8.6°C | 14.7°C | 110 mm | 0 cm |
| October | 13.8°C | 3.1°C | 8.5°C | 113 mm | under 1 cm |
| November | 7.1°C | −1.6°C | 2.8°C | 112 mm | 14 cm |
| December | 1.0°C | −8.3°C | −3.6°C | 113 mm | 50 cm |
| Year | 12.0°C | 0.9°C | 6.5°C | 1,152 mm | 248 cm |
A January here can run warm or cold, its average moving by about 2.5°C; the steadiest month is August
The thirty-year records stretch furthest in March: a low of −27.0°C in 1995 and a high of 24.5°C in 1998.
Where Sussex’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the Canadian Climate Normals, 1991–2020, at Sussex/Four Corners (the closest location with all twelve months of temperatures).
- 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, which none of ECCC’s 450 locations publishes for 1991–2020, and the town’s own height above sea level, so no figure is adjusted for altitude.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Sussex’s climate
How warm does Sussex get in summer?
Midsummer means July, with afternoons near 25.7°C on a typical day.
How cold does Sussex get in winter?
On a normal January night the air drops to −13.2°C, the coldest of the year.
How much rain and snow does Sussex get?
Around 1,152 mm a year in all, from 116 mm in January down to 64 mm in August.
Are these figures for Sussex itself?
Nearly: Sussex/Four Corners, the location behind them, sits just beyond Sussex’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Sussex →
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).