Thorold climate — normals and trends
Thorold has a hot-summer humid continental climate, averaging 9.1 °C annually with 1,062 mm of rain per year.
Climate normals · ERA5
ThoroldOntario
- coords
- 43.12°, -79.20°
- period
- 1940–2025 · 86 yrs
The normals for this period
The average of every indicator across the whole window: temperature, water, sky, wind and notable days.
Mean daily temperature
9.1°C
Average daily high
11.7°C
Average daily low
6.6°C
Annual rainfall
1,062mm
Sunshine / day
8.6h
Mean relative humidity
74%
Average peak wind
25.2km/h
Seasonal range
26.6°C
Frost days (< 0 °C)
104 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
142 d/yr
Annual snowfall
98.9 cm
Average feels-like high
9.1 °C
Average feels-like low
3.0 °C
Average peak gust
41.3 km/h
Tropical nights (≥ 20 °C)
39 d/yr
Solar radiation
14.2 MJ/m²
Has the climate changed?
What the yearly averages say about warming here, and whether the slope is statistically solid.
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.24 · 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).
Climate month by month
How an average year unfolds: when it rains, when it turns hot, when the sun is out.
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
The most extreme days ever measured here, then the year-by-year detail.
Hottest day
33.3 °C
3 September 1953
Coldest day
-25.2 °C
17 January 1982
Wettest day
82 mm
9 September 2004
Windiest day
66.8 km/h
15 March 1959
Strongest gust
117.7 km/h
6 April 1979
Hottest feels-like
36.8 °C
3 September 1953
Coldest feels-like
-33.9 °C
17 January 1982
Snowiest day
28.1 cm
7 February 1942
Sunniest day
14.9 h
3 July 2025
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and compare it with the normal: warmer, drier, more extreme?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -1.4 °C | -0.1 °C | 44 mm | -29 mm |
| Feb | -0.7 °C | +0.4 °C | 88 mm | +21 mm |
| Mar | 6.0 °C | +3.3 °C | 82 mm | -3 mm |
| Apr | 8.9 °C | +0.4 °C | 90 mm | -7 mm |
| May | 14.4 °C | -1.6 °C | 130 mm | +36 mm |
| Jun | 21.8 °C | -0.5 °C | 55 mm | -43 mm |
| Jul | 25.8 °C | +0.8 °C | 65 mm | -36 mm |
| Aug | 23.7 °C | -0.5 °C | 63 mm | -30 mm |
| Sep | 21.3 °C | +0.9 °C | 26 mm | -67 mm |
| Oct | 15.3 °C | +1.2 °C | 95 mm | +6 mm |
| Nov | 7.6 °C | -0.3 °C | 76 mm | -15 mm |
| Dec | 1.9 °C | -0.3 °C | 97 mm | +14 mm |
The year's extremes
What was the weather like that day?
The weather actually measured on a given date, anywhere in the covered window.
Climate at a glance
What these normals say about the place, in a few sentences, and the notions needed to read them.
Thorold (Canada) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 9.1 °C and it receives 1,062 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 July (22.5 °C on average) and the coldest is February (-4.1 °C). Rainfall peaks in July.
Thorold averages 104 frost days, 1 hot days (≥ 30 °C) and 142 rainy days per year.
Thorold has warmed by +1.4 °C between 1940 and 2025, or +0.16 °C per decade. This trend is statistically significant.
The number of frost days there went from about 119 to 89 per year over the period.
The hottest day of the period reached 33.3 °C (on 3 September 1953) and the coldest -25.2 °C (on 17 January 1982).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Compare Thorold with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Thorold
Other cities — Canada
Frequently asked questions
What is the climate of Thorold?
Thorold has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 9.1 °C and it receives 1,062 mm of precipitation per year.
What is the hottest day ever recorded in Thorold?
The hottest day measured in Thorold between 1940 and 2025 was 3 September 1953, reaching 33.3 °C.
What is the coldest day in Thorold?
The coldest day measured in Thorold between 1940 and 2025 was 17 January 1982, at -25.2 °C.
Does it snow in Thorold?
Yes. Thorold gets on average 98.9 cm of snow per year and has around 104 frost days.
Has the climate of Thorold warmed?
Yes: Thorold warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Thorold?
The wettest day measured in Thorold between 1940 and 2025 was 9 September 2004, with 82 mm of rain in 24 hours.
What was the windiest day in Thorold?
The windiest day measured in Thorold between 1940 and 2025 was 15 March 1959, with winds reaching 66.8 km/h.
What is the warmest month in Thorold?
The warmest month in Thorold is July (22.5 °C on average); the coldest is February (-4.1 °C).
How much does it rain in Thorold?
Thorold receives on average 1,062 mm of precipitation per year, spread over about 142 rainy days.
Is it sunny in Thorold?
Thorold gets on average 8.6 hours of sunshine per day, roughly 3,139 hours per year over 1940-2025.
What is the biggest single-day snowfall in Thorold?
The heaviest 24-hour snowfall measured in Thorold between 1940 and 2025 was 7 February 1942, with 28.1 cm.
Are there tropical nights in Thorold?
Yes: Thorold has on average 39 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Thorold?
In Thorold, between 1940 and 2025, the highest apparent temperature reached 36.8 °C on 3 September 1953, and the lowest was -33.9 °C on 17 January 1982.
These forecasts and records come from our own weather API. Developer documentation →