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Arnprior (ON) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Arnprior.
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Climate overview of Arnprior
Temperatures in Arnprior, Ontario, Canada, vary greatly throughout the year. July is the hottest month at 27°C (81°F), while January is the coldest at -4°C (25°F).
With around 1013 mm (40 in) of annual rain/snowfall, Arnprior 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. Sunshine peaks in July, when the city sees around 9.3 hours of sunshine per day.
Arnprior Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Arnprior - and find the best time to visit.
Monthly Temperature in Arnprior
The climate in Arnprior is known for significant temperature differences throughout the year, making the weather dynamic. 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 -4°C (25°F).
At night, temperatures range from around 15°C (59°F) in July to -15°C (5°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Arnprior
Arnprior has a notably wet climate with abundant precipitation, recording 1013 mm (40 in) of rain/snowfall per year. Despite minor fluctuations, Arnprior enjoys fairly consistent precipitation throughout the year. In June, you can expect around 99 mm (3.9 in) of precipitation, while in February, Arnprior receives about 64 mm (2.5 in). For more details, please visit our Arnprior 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 Arnprior
Arnprior 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 (51 KM, 32 Miles).
Daily hours of sunshine
Data from: Ottawa, Canada (51 KM, 32 Miles).
Daily percentage of sunshine
Data from: Ottawa, Canada (51 KM, 32 Miles).
Humidity in Arnprior by Month
The relative humidity is moderate throughout the year in Arnprior.
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 (51 KM, 32 Miles).
Best Time to Visit Arnprior
Conditions in Arnprior are generally most comfortable in May, June, July, August and September. They are typically 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
excellent
Jun
excellent
Jul
excellent
Aug
excellent
Sep
excellent
Oct
good
Nov
cold
Dec
very cold
- Best overall: May, 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 -15°C (5°F).
Frequently asked questions about the climate in Arnprior
What is the best time to visit Arnprior?
May, June, July, August and September typically offer the most optimal weather in Arnprior. In contrast, January, February, March, November and December tend to have less optimal conditions. Arnprior has warm summers and very cold winters.
What temperatures can I expect in Arnprior?
Daytime highs range from -4°C (25°F) in January to 27°C (81°F) in July. Nighttime lows range from -15°C (5°F) to 15°C (59°F). Temperatures vary considerably through the year.
How much rain does Arnprior get?
Annual rainfall is around 1013 mm (40 in). June is the wettest month with 99 mm (3.9 in), while February is the driest with 64 mm (2.5 in).
How sunny is Arnprior?
Arnprior 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, Arnprior enjoys abundant sunshine.
Arnprior 3-Day Forecast
Arnprior on the map
Arnprior is highlighted - select any city to see its climate.
Popular in September
Where to go in September - average daytime high across popular destinations.
Toronto
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