Photo: ValerieWalking · CC BY-SA 2.0Newcastle sits near the top of Canadian towns for snow: about 337 cm a year
The depth of winter brings overnight lows near −15.3°C. Precipitation is plentiful here, more than falls on 80% of Canadian towns. Rain or snow is most frequent in October and least in February. Heating does most of its work from October to April, in months below 10°C on average.
No ECCC station in Newcastle has 1991–2020 normals; the page reads Miramichi, 16 km south-east, instead.
A year in Newcastle at a glance
Each month’s typical high and low, in °C.
What stands out about Newcastle’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in New Brunswick beside it.
What a year in Newcastle feels like
Each season’s and each month’s usual high and low, 1991–2020.
About 177 frosts and 101 warm days a year
From October to May frost is routine, and in January it comes on almost every night. Some 21 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 1,083 mm of rain and snow a year
On about 124 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Snowfall: about 337 cm in a normal year
Expect snow from October to May, with about 71 cm in January, the snowiest month. 5th snowiest of 61 towns of 2,500+ in New Brunswick.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Snowfall: Bathurst, 59 km away (Miramichi records no complete year of it).
Heating a home in Newcastle
89% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Warm days count for nothing; each colder day adds how far its mean sits below 18°C.
Living with Newcastle’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Seedlings can go out once the average last frost, around 23 May, has passed; autumn’s first, near 5 October, ends a season of about 133 days.
Warm afternoons without cold nights, 17–27°C and 8°C or more, mark Jun, Jul, Aug and Sep.
Parks & trails →Frostbite weather, a wind chill under −20, turns up on about 42 days a year.
Count on some 36 humid days a year with the humidex past 30.
For blizzards, floods and wildfire, turn to Newcastle’s hazards page.
Flood & hazards →ECCC’s normals location: Miramichi
ECCC builds the Miramichi normals from 2 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 16 km south-east |
| Station altitude | 33 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | Bathurst, 59 km |
| Coldest reading, 1991–2020 | −34.5°C |
| Hottest reading, 1991–2020 | 37.2°C |
| Average wind | 12.3 km/h on average, most often from the west |
| Next-nearest location | Bathurst, 59 km |
How Newcastle 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 Newcastle whose figures come from another normals location. No closer places have figures: these lie 40–62 km from Newcastle.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Newcastle Miramichi | 25.5°C | −15.3°C | 1,083 mm |
| Allardville 40 km · Bathurst | 25.1°C about the same | −16.0°C 0.7°C colder | 1,118 mm |
| Hardwicke 48 km · Kouchibougauac | 25.8°C about the same | −14.1°C 1.2°C milder | 1,240 mm |
Newcastle weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −4.3°C | −15.3°C | −9.8°C | 87 mm | 71 cm |
| February | −3.0°C | −14.8°C | −8.9°C | 72 mm | 69 cm |
| March | 2.0°C | −8.8°C | −3.4°C | 94 mm | 68 cm |
| April | 8.6°C | −2.0°C | 3.3°C | 84 mm | 30 cm |
| May | 16.3°C | 4.0°C | 10.2°C | 97 mm | 2 cm |
| June | 22.0°C | 9.8°C | 15.9°C | 89 mm | 0 cm |
| July | 25.5°C | 13.8°C | 19.6°C | 90 mm | 0 cm |
| August | 24.8°C | 12.9°C | 18.8°C | 85 mm | 0 cm |
| September | 20.2°C | 8.3°C | 14.3°C | 90 mm | 0 cm |
| October | 12.7°C | 2.5°C | 7.6°C | 113 mm | 6 cm |
| November | 5.5°C | −2.9°C | 1.3°C | 93 mm | 22 cm |
| December | −0.8°C | −9.6°C | −5.2°C | 89 mm | 68 cm |
| Year | 10.8°C | −0.2°C | 5.3°C | 1,083 mm | 337 cm |
February varies most from one year to the next (2.5°C), August least
Records from 1991 to 2020: no month spans more than March, between −31.4°C (1997) and 26.3°C (2012).
Where Newcastle’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the Canadian Climate Normals, 1991–2020, at Miramichi (the closest location with all twelve months of temperatures).
- Other locations: where a location publishes no full year of precipitation or snowfall, the nearest one that does supplies it, named beside those figures.
- 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, absent from every 1991–2020 location, and an altitude correction, for want of the town’s own elevation.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Newcastle’s climate
How warm does Newcastle get in summer?
Peak warmth comes in July, at about 25.5°C by mid-afternoon.
How cold does Newcastle get in winter?
The coldest nights come in January, averaging −15.3°C.
How much rain and snow does Newcastle get?
Rain and snow add up to about 1,083 mm of water a year; October brings the most (113 mm), February the least (72 mm).
Are these figures for Newcastle itself?
They are the closest available: the normals for Miramichi, since Newcastle has none.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Newcastle →
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).