Delta Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Delta.
Climate overview of Delta
Delta, located in the Rideau Lakes region of Canada, is a small community surrounded by lakes, forests, and heritage sites. The weather here changes noticeably through the seasons. Summers are warm and great for outdoor activities, while winters can be very cold with frequent snowfall. The area is also known for its heavy precipitation throughout the year, including both rain and snow. Now, let’s explore all the climate details to give you a complete picture.
Delta Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Delta - and find the best time to visit.
Monthly Temperature in Delta
The climate in Delta is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 27°C (81°F) in July to a very cold -2°C (28°F) in the coolest month, January.
Nights vary from 17°C (63°F) in July to around -12°C (10°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Delta
Delta has a notably wet climate with abundant precipitation, recording 1056 mm (42 in) of rain/snowfall per year. Precipitation levels in Delta remain relatively steady throughout the year. April has the most rain, with 103 mm (4.1 in) over 11 days. In the driest month February, this drops slightly to 68 mm (2.7 in), making the city's climate fairly predictable. For more details, please visit our Delta 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 Delta
For those who appreciate different seasons, Delta serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 9.3 hours of sunshine daily, and embrace the darker days in December, offering only 2.5 hours of daily sunlight.
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 Delta
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- 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 -12°C (10°F).
Frequently asked questions about the climate in Delta
What is the best time to visit Delta?
June, July, August and September typically offer the most optimal weather in Delta. In contrast, January, February, March, April, November and December tend to have less optimal conditions. Delta has warm summers and very cold winters.
What temperatures can I expect in Delta?
Daytime highs range from -2°C (28°F) in January to 27°C (81°F) in July. Nighttime lows range from -12°C (10°F) to 17°C (63°F). Temperatures vary considerably through the year.
How much rain does Delta get?
Annual rainfall is around 1056 mm (42 in). April is the wettest month with 103 mm (4.1 in), while February is the driest with 68 mm (2.7 in).
How sunny is Delta?
Delta receives around 1,971 hours of sunshine per year. July is the sunniest month with 280 hours, while December is the cloudiest with just 75 hours.
Delta 3-Day Forecast
Delta 3-Day Forecast
Delta on the map
Delta 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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