Mill Bay (BC) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Mill Bay.
Climate overview of Mill Bay
Mill Bay, British Columbia, Canada, experiences significant temperature variation throughout the year. Summers bring daytime highs of 23°C (73°F) in August, while winters cool to 7°C (45°F) in December.
With around 1238 mm (49 in) of annual rain/snowfall, Mill Bay has a notably wet climate. However, this rain/snowfall is not evenly distributed, the city has distinct dry (July to August) and wet (November to January) seasons, with warm summers and cold winters. The wettest month is November. The sunniest month is July, with 11.0 hours of sunshine per day on average.
Mill Bay Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Mill Bay - and find the best time to visit.
Monthly Temperature in Mill Bay
Depending on the time of the year, temperatures range from comfortable to chilly in Mill Bay. Average daytime temperatures reach a comfortable 23°C (73°F) in August. In December, the coolest month of the year, temperatures drop to a chilly 7°C (45°F).
At night, temperatures range from around 14°C (57°F) in August to 2°C (36°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Mill Bay
Mill Bay has a relatively rain/snowy climate with high precipitation levels, averaging 1238 mm (49 in) of rain/snowfall annually. Mill Bay can be quite wet during November, receiving approximately 187 mm (7.4 in) of precipitation over 20 rainy days.
In contrast, during the driest month (July), you will experience much drier conditions, with 23 mm (0.9 in) of precipitation spread across 6 rainy days. For more details, please visit our Mill Bay 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 Mill Bay
Mill Bay can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 11.0 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 2.3 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 Mill Bay by Month
The relative humidity is high throughout the year in Mill Bay.
The city experiences its highest humidity in January, reaching 78%. In July, the humidity drops to its lowest level at 55%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Mill Bay
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
- Fewest rainy days: July and August
- Wettest months: January, February, March, October, November and December, when rainfall is highest.
- Seasonal pattern: Distinct dry (July to August) and wet (November to January) seasons, with warm summers and cold winters
Frequently asked questions about the climate in Mill Bay
What is the best time to visit Mill Bay?
June, July, August and September typically offer the most optimal weather in Mill Bay. In contrast, January, February, March, November and December tend to have less optimal conditions. Mill Bay has distinct dry (July to August) and wet (November to January) seasons, with warm summers and cold winters.
What temperatures can I expect in Mill Bay?
Daytime highs range from 7°C (45°F) in December to 23°C (73°F) in August. Nighttime lows range from 2°C (36°F) to 14°C (57°F). Temperatures vary considerably through the year.
How much rain does Mill Bay get?
Annual rainfall is around 1238 mm (49 in). November is the wettest month with 187 mm (7.4 in), while July is the driest with 23 mm (0.9 in).
How sunny is Mill Bay?
Mill Bay receives around 2,220 hours of sunshine per year. July is the sunniest month with 330 hours, while December is the cloudiest with just 70 hours. Overall, Mill Bay enjoys abundant sunshine.
Mill Bay 3-Day Forecast
Mill Bay on the map
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