More rain and snow fall on Greenwich than on 92% of Canadian towns: 1,271 mm a year
Deep winter brings January lows near −13.2°C. By July afternoons alone, it runs cooler than 90% of Canadian towns. November is the wettest month, August the driest. Garden chairs stay out from June to August, the months with highs of 20–23°C.
These are not Greenwich’s own readings: ECCC keeps no normals there, so the page uses Saint John, 28 km south-east.
A year in Greenwich at a glance
Each month’s typical high and low, in °C.
What stands out about Greenwich’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in New Brunswick beside it.
What a year in Greenwich feels like
Each season’s and each month’s usual high and low, 1991–2020.
Frost on 170 days, 20°C on 80
Frost comes from September to May; in January almost every night freezes. Some 13 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 1,271 mm of rain and snow a year
The wettest of 61 towns of 2,500+ in New Brunswick. On about 120 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 215 cm of snow a year
From November to April snow is likely; January is the peak, at about 60 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Greenwich
87% of a year’s heating need falls between October and April. Months averaging under 10°C: October to May.
The count adds up, day by day, how far the mean temperature falls short of 18°C.
Living with Greenwich’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
On average the last spring frost comes around 21 May and the first autumn frost around 27 September: about 128 frost-free days between.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: Jun, Jul and Aug.
Parks & trails →Bitter wind chill, under −20, comes on about 37 days a year.
Plan shade and water for about 12 days a year above 30 on the humidex.
For blizzards, floods and wildfire, turn to Greenwich’s hazards page.
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 | 28 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 | Point Lepreau, 52 km |
How Greenwich compares
Against the 2,611 Canadian towns and neighbourhoods of 2,500 or more, each read from its own normals location; the dots are the other locations those towns use in New Brunswick.
Nearby towns’ climate
Places around Greenwich whose figures come from another normals location. Distances here run 33–42 km: that is how far the nearest places with figures are from Greenwich.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Greenwich Saint John | 23.0°C | −13.2°C | 1,271 mm |
| Norton 33 km · Sussex/Four Corners | 25.7°C 2.7°C warmer | −13.2°C about the same | 1,152 mm |
| Burton 42 km · Fredericton (Airport) | 25.9°C 2.9°C warmer | −14.6°C 1.4°C colder | 1,022 mm |
| Musquash 42 km · Point Lepreau | 19.9°C 3.1°C cooler | −9.5°C 3.7°C milder | 1,125 mm |
Greenwich 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 | −2.5°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 |
From −28.4°C to 25.4°C: March’s coldest and warmest days since 1991
From one year to the next, January’s average typically shifts by 2.5°C around its normal of −7.9°C, the widest of any month, while August’s shifts by 0.7°C.
Where Greenwich’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Saint John, 1991–2020, chosen as the nearest location with a full temperature record.
- Comparisons: all Canadian places of 2,500 or more except city totals and reserves, each read the same way.
- 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 Greenwich’s climate
How warm does Greenwich get in summer?
Summer peaks in July: a typical afternoon reaches 23.0°C.
How cold does Greenwich 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 Greenwich get?
The year adds up to 1,271 mm. November is the peak month (138 mm) and August the low one (73 mm).
Are these figures for Greenwich itself?
Not exactly. Greenwich lacks a normals station, so Saint John supplies the figures.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Greenwich →
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).