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Perth (ON) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Perth.
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Climate overview of Perth
Perth, Ontario, Canada, experiences significant temperature variation throughout the year. Summers bring daytime highs of 27°C (81°F) in July, while winters cool to -3°C (27°F) in January.
With around 1007 mm (40 in) of annual rain/snowfall, Perth has a notably wet climate. However, this rain/snowfall is not evenly distributed, the city has warm summers and very cold winters. The wettest month is June. The sunniest month is July, with 9.3 hours of sunshine per day on average.
Perth Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Perth - and find the best time to visit.
Monthly Temperature in Perth
Depending on the time of the year, temperatures range from comfortable to very cold in Perth. Average daytime temperatures reach a comfortable 27°C (81°F) in July. In January, the coolest month of the year, temperatures drop to a very cold -3°C (27°F).
At night, temperatures range from around 16°C (61°F) in July to -13°C (9°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Perth
Perth has a relatively rain/snowy climate with high precipitation levels, averaging 1007 mm (40 in) of rain/snowfall annually. Despite minor fluctuations, Perth enjoys fairly consistent precipitation throughout the year. In June, you can expect around 97 mm (3.8 in) of precipitation, while in February, Perth receives about 65 mm (2.6 in). For more details, please visit our Perth Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Perth
Perth can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 9.3 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 2.8 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Ottawa, Canada (72 KM, 45 Miles).
Daily hours of sunshine
Data from: Ottawa, Canada (72 KM, 45 Miles).
Daily percentage of sunshine
Data from: Ottawa, Canada (72 KM, 45 Miles).
Humidity in Perth by Month
The relative humidity is moderate throughout the year in Perth.
The city experiences its highest humidity in December, reaching 72%. In May, the humidity drops to its lowest level at 49%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Data from: Ottawa, Canada (72 KM, 45 Miles).
Best Time to Visit Perth
The most comfortable overall weather for exploring Perth is usually found in June, July, August and September. Conditions are generally least comfortable in January, February, March, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
very cold
Feb
very cold
Mar
cold
Apr
mixed
May
very good
Jun
excellent
Jul
excellent
Aug
excellent
Sep
excellent
Oct
good
Nov
cold
Dec
cold
- Best overall: June, July, August and September
- Warmest weather: July and August
- Most sunshine: July
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -13°C (9°F).
Frequently asked questions about the climate in Perth
What is the best time to visit Perth?
June, July, August and September typically offer the most optimal weather in Perth. In contrast, January, February, March, November and December tend to have less optimal conditions. Perth has warm summers and very cold winters.
What temperatures can I expect in Perth?
Daytime highs range from -3°C (27°F) in January to 27°C (81°F) in July. Nighttime lows range from -13°C (9°F) to 16°C (61°F). Temperatures vary considerably through the year.
How much rain does Perth get?
Annual rainfall is around 1007 mm (40 in). June is the wettest month with 97 mm (3.8 in), while February is the driest with 65 mm (2.6 in).
How sunny is Perth?
Perth receives around 2,087 hours of sunshine per year. July is the sunniest month with 280 hours, while December is the cloudiest with just 83 hours. Overall, Perth enjoys abundant sunshine.
Perth 3-Day Forecast
Perth on the map
Perth is highlighted - select any city to see its climate.
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