Orillia climate — normals and trends
Orillia (Canada) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.7 °C and it receives 919 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 (20.4 °C on average) and the coldest is January (-7.9 °C). Rainfall peaks in August.
Orillia averages 143 frost days, 8 hot days (≥ 30 °C) and 142 rainy days per year.
Orillia has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The number of frost days there went from about 151 to 135 per year over the period.
The hottest day of the period reached 36.6 °C (on 1 July 2018) and the coldest -33.6 °C (on 14 February 2016).
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
OrilliaOntario
- coords
- 44.61°, -79.42°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.7°C
Average daily high
10.9°C
Average daily low
2.5°C
Annual rainfall
919mm
Sunshine / day
8.4h
Mean relative humidity
77%
Average peak wind
18.1km/h
Seasonal range
28.3°C
Frost days (< 0 °C)
143 d/yr
Hot days (≥ 30 °C)
8 d/yr
Rainy days (≥ 1 mm)
142 d/yr
Annual snowfall
130.3 cm
Average feels-like high
8.6 °C
Average feels-like low
-0.7 °C
Average peak gust
37.6 km/h
Tropical nights (≥ 20 °C)
6 d/yr
Solar radiation
13.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.27 · 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
36.6 °C
1 July 2018
Coldest day
-33.6 °C
14 February 2016
Wettest day
89 mm
15 October 1954
Windiest day
49.7 km/h
29 June 1957
Strongest gust
100.4 km/h
10 March 2002
Hottest feels-like
39.8 °C
16 June 1994
Coldest feels-like
-38.6 °C
14 February 2016
Snowiest day
29.0 cm
25 February 1965
Sunniest day
15.0 h
19 June 2022
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 | -4.9 °C | -0.8 °C | 54 mm | -6 mm |
| Feb | -4.5 °C | -1.3 °C | 77 mm | +25 mm |
| Mar | 4.8 °C | +2.9 °C | 93 mm | +29 mm |
| Apr | 10.3 °C | +0.4 °C | 72 mm | -3 mm |
| May | 17.1 °C | -0.5 °C | 117 mm | +33 mm |
| Jun | 24.4 °C | +1.6 °C | 78 mm | -9 mm |
| Jul | 27.4 °C | +2.3 °C | 45 mm | -43 mm |
| Aug | 24.8 °C | +0.8 °C | 71 mm | -20 mm |
| Sep | 21.8 °C | +2.0 °C | 62 mm | -22 mm |
| Oct | 15.1 °C | +2.1 °C | 77 mm | -7 mm |
| Nov | 4.4 °C | -1.1 °C | 84 mm | +4 mm |
| Dec | -2.0 °C | -0.9 °C | 87 mm | +17 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 Orillia?
Orillia has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.7 °C and it receives 919 mm of precipitation per year.
What is the hottest day ever recorded in Orillia?
The hottest day measured in Orillia between 1940 and 2025 was 1 July 2018, reaching 36.6 °C.
What is the coldest day in Orillia?
The coldest day measured in Orillia between 1940 and 2025 was 14 February 2016, at -33.6 °C.
Does it snow in Orillia?
Yes. Orillia gets on average 130.3 cm of snow per year and has around 143 frost days.
Has the climate of Orillia warmed?
Yes: Orillia warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Orillia?
The wettest day measured in Orillia between 1940 and 2025 was 15 October 1954, with 89 mm of rain in 24 hours.
What was the windiest day in Orillia?
The windiest day measured in Orillia between 1940 and 2025 was 29 June 1957, with winds reaching 49.7 km/h.
What is the warmest month in Orillia?
The warmest month in Orillia is July (20.4 °C on average); the coldest is January (-7.9 °C).
How much does it rain in Orillia?
Orillia receives on average 919 mm of precipitation per year, spread over about 142 rainy days.
Is it sunny in Orillia?
Orillia gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Orillia?
The heaviest 24-hour snowfall measured in Orillia between 1940 and 2025 was 25 February 1965, with 29.0 cm.
Are there tropical nights in Orillia?
Yes: Orillia has on average 6 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Orillia?
In Orillia, between 1940 and 2025, the highest apparent temperature reached 39.8 °C on 16 June 1994, and the lowest was -38.6 °C on 14 February 2016.
Compare Orillia with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Orillia