Delta (BC) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Delta.
Climate overview of Delta
Temperatures in Delta, British Columbia, Canada, vary greatly throughout the year. July is the hottest month at 23°C (73°F), while December is the coldest at 6°C (43°F).
Delta sees a moderate amount of rain/snowfall, totalling around 953 mm (38 in) per year. It experiences a distinct dry season from June to August, creating some seasonal variation. July is the sunniest month, averaging 9.6 hours of sunshine per day.
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. Average maximum daytime temperatures range from a comfortable 23°C (73°F) in July, the warmest time of the year, to a chilly 6°C (43°F) during cooler months like December.
At night, you can expect temperatures ranging from 14°C (57°F) in July to around 2°C (36°F) during December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Delta
Generally, Delta receives mid-range precipitation levels, with 953 mm (38 in) annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, November it receives high rainfall, averaging 150 mm (5.9 in) of precipitation, recorded across 21 rainy days. In contrast, the driest month July brings less rainfall, with 18 mm (0.7 in) over 6 rainy days. 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
Seasonal changes in sunshine hours are quite dramatic in Delta. While July receives considerable daily sunshine with up to 9.6 hours, December marks the darkest time of the year, where sunshine is scarce with only 1.9 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 Delta by Month
The relative humidity is high throughout the year in Delta.
The city experiences its highest humidity in January, reaching 81%. In July, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Delta
Frequently asked questions about the climate in Delta
What is the best time to visit Delta?
June, July and August typically offer the most optimal weather in Delta. In contrast, January, February, March, November and December tend to have less optimal conditions. Delta has a distinct dry season from June to August.
What temperatures can I expect in Delta?
Daytime highs range from 6°C (43°F) in December to 23°C (73°F) in July. Nighttime lows range from 2°C (36°F) to 14°C (57°F). Temperatures vary considerably through the year.
How much rain does Delta get?
Annual rainfall is around 953 mm (38 in). November is the wettest month with 150 mm (5.9 in), while July is the driest with 18 mm (0.7 in).
How sunny is Delta?
Delta receives around 1,932 hours of sunshine per year. July is the sunniest month with 289 hours, while December is the cloudiest with just 56 hours.
Delta 3-Day Forecast
Delta (BC) 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
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19°C (66°F) 
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