Photo: Earth Science and Remote Sensing Unit , Lyndon B. Johnson Space Center · Public domainPrecipitation in McAdam tops that of 86% of Canadian towns: 1,161 mm a year
Nights in January average −13.6°C. The seasons are far apart: from a winter night to a summer afternoon the average spans 39°C. Expect about 172 frosty starts a year, days when the air falls to freezing.
These are not McAdam’s own readings: ECCC keeps no normals there, so the page uses St. Stephen, 43 km south.
A year in McAdam at a glance
Each month’s typical high and low, in °C.
What stands out about McAdam’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in New Brunswick beside it.
What a year in McAdam feels like
Each season’s and each month’s usual high and low, 1991–2020.
Frost on about 172 days a year
Frost comes from September to May; in January almost every night freezes. On about 16 nights a year the air falls below −20°C.
Frost days by month
Average days at 0°C or below
Rain and melted snow: about 1,161 mm a year
December brings the most rain and snow; April, the least. Some 125 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
St. Stephen publishes no full year of precipitation or snowfall, so these figures, and the snow below, come from Woodstock/Newbridge, 67 km away.
292 cm of snow in a typical year
Expect snow from October to April, with about 69 cm in January, the snowiest month.
Snowfall by month
Centimetres
Living with McAdam’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Plan time outside for Jun, Jul and Aug: highs of 17–27°C and nights no colder than 8°C.
Parks & trails →Plan for about 26 days a year with a wind chill below −20.
A humidex above 30 marks about 37 days in a normal year.
Ice storms, floods and heat waves are risks, not averages: they are on McAdam’s hazards page.
Flood & hazards →ECCC’s normals location: St. Stephen
Behind the 1991–2020 normals for St. Stephen are 2 stations, which ECCC combines into one record.
| Distance from the town | 43 km south |
| Station altitude | 26 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Precipitation from | Woodstock/Newbridge, 67 km |
| Coldest reading, 1991–2020 | −33.0°C |
| Hottest reading, 1991–2020 | 35.2°C |
| Average wind | 7.5 km/h on average, most often from the west |
| Next-nearest location | Woodstock/Newbridge, 67 km |
How McAdam 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 McAdam’s would only repeat its figures. McAdam has few close neighbours with figures, so the list reaches 28–48 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| McAdam St. Stephen | 25.7°C | −13.6°C | 1,161 mm |
| Manners Sutton 28 km · Fredericton (Airport) | 25.9°C about the same | −14.6°C 1.0°C colder | 1,022 mm |
| Nackawic 44 km · Woodstock/Newbridge | 25.3°C about the same | −15.3°C 1.7°C colder | 1,161 mm |
McAdam weather by month
Average daily high and low, mean temperature, rain and snow (as water) and snowfall by month, 1991–2020.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −2.1°C | −13.6°C | −8.0°C | 101 mm | 69 cm |
| February | −0.5°C | −12.7°C | −6.6°C | 84 mm | 64 cm |
| March | 4.0°C | −7.3°C | −1.7°C | 93 mm | 53 cm |
| April | 10.7°C | −1.0°C | 4.8°C | 84 mm | 19 cm |
| May | 17.4°C | 4.2°C | 10.9°C | 92 mm | 1 cm |
| June | 22.1°C | 9.1°C | 15.6°C | 104 mm | 0 cm |
| July | 25.7°C | 12.7°C | 19.2°C | 100 mm | 0 cm |
| August | 25.3°C | 11.9°C | 18.6°C | 88 mm | 0 cm |
| September | 21.3°C | 7.5°C | 14.4°C | 93 mm | under 1 cm |
| October | 14.0°C | 2.1°C | 8.1°C | 105 mm | 3 cm |
| November | 7.2°C | −2.6°C | 2.3°C | 101 mm | 22 cm |
| December | 1.2°C | −8.9°C | −3.9°C | 115 mm | 61 cm |
| Year | 12.2°C | 0.1°C | 6.2°C | 1,161 mm | 292 cm |
March: −27.8°C at its coldest, 28.6°C at its warmest
The month to count on least is February: one year in three its average strays more than 2.7°C from −6.6°C. August moves least, typically by 0.9°C.
Where McAdam’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s 1991–2020 Canadian Climate Normals for St. Stephen, the nearest location with a full year of temperatures.
- Other locations: a location missing months of precipitation or snow is filled from the nearest that has them all, never mixed month by month.
- 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: 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 McAdam’s climate
How warm does McAdam get in summer?
A normal July afternoon tops out at about 25.7°C, the year’s high point.
How cold does McAdam get in winter?
January nights average −13.6°C, the coldest of the year.
How much rain and snow does McAdam get?
Around 1,161 mm a year in all, from 115 mm in December down to 84 mm in April.
Are these figures for McAdam itself?
They describe St. Stephen, the nearest normals location, rather than McAdam itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for McAdam →
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).