Waterloo (ON) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Waterloo.
Climate overview of Waterloo
The climate in Waterloo, Ontario, Canada, is marked by large temperature swings across the seasons, ranging from 27°C (81°F) in July to -1°C (30°F) in January.
Waterloo sees a moderate amount of rain/snowfall, totalling around 998 mm (39 in) per year. It experiences warm summers and very cold winters, creating some seasonal variation. July is the sunniest month, averaging 10.2 hours of sunshine per day.
Waterloo Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Waterloo - and find the best time to visit.
Monthly Temperature in Waterloo
In Waterloo, temperatures differ significantly between summer and winter months. Average maximum daytime temperatures range from a comfortable 27°C (81°F) in July, the warmest time of the year, to a very cold -1°C (30°F) during cooler months like January.
At night, you can expect temperatures ranging from 15°C (59°F) in July to around -10°C (14°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Waterloo
On average, Waterloo receives a reasonable amount of rain/snowfall, with an annual precipitation of 998 mm (39 in). Year-round, Waterloo has a balanced climate with minimal variation in precipitation. The difference between the wettest month, June, with 103 mm (4.1 in), and the driest month, February, with 67 mm (2.6 in), is minimal. For more details, please visit our Waterloo 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 Waterloo
Seasonal changes in sunshine hours are quite dramatic in Waterloo. While July receives considerable daily sunshine with up to 10.2 hours, December marks the darkest time of the year, where sunshine is scarce with only 2.4 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
Best Time to Visit Waterloo
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, July, August and September
- Warmest weather: July and August
- Most sunshine: July
- Fewer rainy days: May, June, July, August and September
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -10°C (14°F).
Frequently asked questions about the climate in Waterloo
What is the best time to visit Waterloo?
May, July, August and September typically offer the most optimal weather in Waterloo. In contrast, January, February, March, November and December tend to have less optimal conditions. Waterloo has warm summers and very cold winters.
What temperatures can I expect in Waterloo?
Daytime highs range from -1°C (30°F) in January to 27°C (81°F) in July. Nighttime lows range from -10°C (14°F) to 15°C (59°F). Temperatures vary considerably through the year.
How much rain does Waterloo get?
Annual rainfall is around 998 mm (39 in). June is the wettest month with 103 mm (4.1 in), while February is the driest with 67 mm (2.6 in).
How sunny is Waterloo?
Waterloo receives around 2,120 hours of sunshine per year. July is the sunniest month with 305 hours, while December is the cloudiest with just 72 hours. Overall, Waterloo enjoys abundant sunshine.
Waterloo 3-Day Forecast
Waterloo on the map
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