Conception Bay South climate — normals and trends
Conception Bay South (Canada) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is 5.0 °C and it receives 1,262 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is August (15.3 °C on average) and the coldest is February (-4.0 °C). Rainfall peaks in January.
Conception Bay South averages 130 frost days, 0 hot days (≥ 30 °C) and 161 rainy days per year.
Conception Bay South has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.
The hottest day of the period reached 24.1 °C (on 12 August 2025) and the coldest -22.8 °C (on 18 February 1990).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
Conception Bay SouthNewfoundland and Labrador
- coords
- 47.50°, -53.00°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
5.0°C
Average daily high
7.3°C
Average daily low
2.9°C
Annual rainfall
1,262mm
Sunshine / day
6.8h
Mean relative humidity
83%
Average peak wind
26.9km/h
Seasonal range
19.3°C
Frost days (< 0 °C)
130 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
161 d/yr
Annual snowfall
213.7 cm
Average feels-like high
3.7 °C
Average feels-like low
-1.7 °C
Average peak gust
44.8 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
11.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.17 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
24.1 °C
12 August 2025
Coldest day
-22.8 °C
18 February 1990
Wettest day
93 mm
19 September 2001
Windiest day
77.7 km/h
11 September 2021
Strongest gust
144.7 km/h
11 September 2021
Hottest feels-like
24.8 °C
16 September 2003
Coldest feels-like
-30.8 °C
3 February 1990
Snowiest day
39.1 cm
17 January 2020
Sunniest day
15.1 h
29 June 2021
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 1.1 °C | +1.5 °C | 113 mm | -19 mm |
| Feb | -0.8 °C | +0.4 °C | 119 mm | +3 mm |
| Mar | 3.1 °C | +2.7 °C | 77 mm | -37 mm |
| Apr | 4.7 °C | +1.3 °C | 137 mm | +43 mm |
| May | 8.0 °C | +0.9 °C | 51 mm | -29 mm |
| Jun | 14.6 °C | +3.2 °C | 66 mm | -13 mm |
| Jul | 18.8 °C | +2.4 °C | 73 mm | -5 mm |
| Aug | 18.9 °C | +1.3 °C | 79 mm | -10 mm |
| Sep | 16.1 °C | +1.4 °C | 53 mm | -51 mm |
| Oct | 11.2 °C | +1.0 °C | 63 mm | -55 mm |
| Nov | 7.2 °C | +0.9 °C | 205 mm | +77 mm |
| Dec | 2.9 °C | +0.7 °C | 220 mm | +92 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Conception Bay South?
Conception Bay South has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is 5.0 °C and it receives 1,262 mm of precipitation per year.
What is the hottest day ever recorded in Conception Bay South?
The hottest day measured in Conception Bay South between 1940 and 2025 was 12 August 2025, reaching 24.1 °C.
What is the coldest day in Conception Bay South?
The coldest day measured in Conception Bay South between 1940 and 2025 was 18 February 1990, at -22.8 °C.
Does it snow in Conception Bay South?
Yes. Conception Bay South gets on average 213.7 cm of snow per year and has around 130 frost days.
Has the climate of Conception Bay South warmed?
Yes: Conception Bay South warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Conception Bay South?
The wettest day measured in Conception Bay South between 1940 and 2025 was 19 September 2001, with 93 mm of rain in 24 hours.
What was the windiest day in Conception Bay South?
The windiest day measured in Conception Bay South between 1940 and 2025 was 11 September 2021, with winds reaching 77.7 km/h.
What is the warmest month in Conception Bay South?
The warmest month in Conception Bay South is August (15.3 °C on average); the coldest is February (-4.0 °C).
How much does it rain in Conception Bay South?
Conception Bay South receives on average 1,262 mm of precipitation per year, spread over about 161 rainy days.
Is it sunny in Conception Bay South?
Conception Bay South gets on average 6.8 hours of sunshine per day, roughly 2,482 hours per year over 1940-2025.
What is the biggest single-day snowfall in Conception Bay South?
The heaviest 24-hour snowfall measured in Conception Bay South between 1940 and 2025 was 17 January 2020, with 39.1 cm.
Are there tropical nights in Conception Bay South?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Conception Bay South.
What was the most extreme apparent temperature in Conception Bay South?
In Conception Bay South, between 1940 and 2025, the highest apparent temperature reached 24.8 °C on 16 September 2003, and the lowest was -30.8 °C on 3 February 1990.
Compare Conception Bay South with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Conception Bay South