Perth (ON) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Perth.
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. 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
Daily hours of sunshine
Daily percentage of sunshine
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
Best Time to Visit Perth
Rainfall during this time ranges from 82 mm (3.2 in) in May to 97 mm (3.8 in) in June. This means you can expect a mix of sunny days and occasional showers. Planning your next adventure but unsure where to go? Our climate tool suggests perfect locations tailored to your preferred weather conditions. Discover your ideal travel destination with our weather planner.
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.
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) 3-Day Forecast
Perth on the map
Perth is highlighted — select any city to see its climate.
Popular this month
Where to go in July — average daytime high across popular destinations.
Niagara Falls
27°C (81°F) Montréal28°C (82°F) Ottawa27°C (81°F) Quebec City
26°C (79°F) Toronto26°C (79°F) Calgary24°C (75°F) Vancouver22°C (72°F) Whistler
19°C (66°F) 
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