Photo: Shamus7792003 · CC BY-SA 3.0More rain and snow fall on Dieppe than on 89% of Canadian towns: 1,203 mm a year
Peak summer warmth arrives in July, with afternoons near 25.1°C. October is the wettest month, August the driest. The outdoor season runs from June to September, with highs of 20–25°C.
Figures: ECCC’s 1991–2020 normals at Moncton (3.7 km north-east).
A year in Dieppe at a glance
Each month’s typical high and low, in °C.
What stands out about Dieppe’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in New Brunswick beside it.
What a year in Dieppe feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
Frost on 170 days, 20°C on 98
Frost comes from October to May; in January almost every night freezes. Some 12 nights a year drop under −20°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 1,203 mm of rain and snow a year
9th wettest of 60 towns of 2,500+ in New Brunswick. On about 129 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
310 cm of snow in a typical year
From October to May snow is likely; January is the peak, at about 74 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Dieppe
89% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Each day the mean sits under 18°C adds its shortfall; a year’s total is its heating degree days.
Living with Dieppe’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
About 135 days a year pass without frost, from an average last frost of 19 May to a first of 2 October.
Afternoons of 17–27°C and nights of at least 8°C arrive in Jun, Jul, Aug and Sep.
Parks & trails →The wind chill passes −20 on about 43 days in a normal year.
About 34 days a year feel above 30 on the humidex.
Thirty-year normals hide the storms and the extremes: the hazards page has Dieppe’s risks.
Flood & hazards →ECCC’s normals location: Moncton
Behind the 1991–2020 normals for Moncton are 2 stations, which ECCC combines into one record.
| Distance from the town | 3.7 km north-east |
| Station altitude | 71 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −31.4°C |
| Hottest reading, 1991–2020 | 35.6°C |
| Average wind | 16.7 km/h on average, most often from the south-west |
| Next-nearest location | Bouctouche, 39 km |
How Dieppe 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 Dieppe’s would only repeat its figures. No closer places have figures: these lie 25–33 km from Dieppe.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Dieppe Moncton | 25.1°C | −13.3°C | 1,203 mm |
| Dorchester 25 km · Nappan | 24.3°C 0.8°C cooler | −11.7°C 1.6°C milder | 1,161 mm |
| Dundas 28 km · Bouctouche | 25.1°C about the same | −13.2°C about the same | 1,002 mm |
Dieppe 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 | −3.5°C | −13.3°C | −8.4°C | 102 mm | 74 cm |
| February | −2.5°C | −12.7°C | −7.6°C | 88 mm | 65 cm |
| March | 2.2°C | −7.4°C | −2.6°C | 111 mm | 60 cm |
| April | 8.6°C | −1.5°C | 3.6°C | 94 mm | 29 cm |
| May | 16.1°C | 3.9°C | 10.0°C | 98 mm | 2 cm |
| June | 21.3°C | 9.2°C | 15.3°C | 95 mm | 0 cm |
| July | 25.1°C | 13.4°C | 19.3°C | 87 mm | 0 cm |
| August | 24.7°C | 12.7°C | 18.7°C | 77 mm | 0 cm |
| September | 20.2°C | 8.1°C | 14.2°C | 103 mm | 0 cm |
| October | 13.2°C | 2.9°C | 8.1°C | 124 mm | 2 cm |
| November | 6.3°C | −2.2°C | 2.1°C | 109 mm | 19 cm |
| December | 0.0°C | −8.7°C | −4.4°C | 115 mm | 59 cm |
| Year | 11.0°C | 0.4°C | 5.7°C | 1,203 mm | 310 cm |
March: −24.5°C at its coldest, 26.1°C at its warmest
From one year to the next, January’s average typically shifts by 2.5°C around its normal of −8.4°C, the widest of any month, while August’s shifts by 1.0°C.
Where Dieppe’s numbers come from
Averages over 30 years, not a forecast.
- Normals: Environment and Climate Change Canada’s 1991–2020 normals, Moncton: the nearest of its locations with every month’s temperatures.
- Comparisons: the 2,500-plus towns and neighbourhoods of Canada, each read from its closest normals location; whole cities and reserves aren’t counted.
- 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 Dieppe’s climate
How warm does Dieppe get in summer?
The year’s warmest days come in July, with highs averaging 25.1°C.
How cold does Dieppe get in winter?
In January, the coldest month, the typical low is −13.3°C.
How much rain and snow does Dieppe get?
Some 1,203 mm falls in a year. Most of it comes in October (124 mm), the least in August (77 mm).
How long does snow stay on the ground?
Snow covers the ground, 1 cm or more, on about 120 days a year.
Are these figures for Dieppe itself?
Yes: ECCC’s 1991–2020 normals for Moncton, which is in Dieppe.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Dieppe →
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).