Mill Bay, Canada experiences average highs of 15°C (59°F) and lows of 9°C (48°F) throughout the year. Rainfall is moderate, averaging about 12 rainy days per month. Average highs have stayed broadly stable across the available records.
Mill Bay, Canada Weather & Climate 2026
Monthly climate averages for Mill Bay, Canada. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Feb–Oct 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.6/10
Best: June, July, August, September
UV Index
4
Low
Temperature 15°C / 9°C
Feels Like 14°C / 7°C
Rainy Days 12
Rainfall 99 mm
Sunshine 8 h
Humidity 80%
Wind Speed 14 km/h
Dew Point 9°C
Snow Days 4 days
Frost Days 3 days
Hottest Month
26°C
August
Avg Low17°C
Rain4days
Coldest Month
3°C
February
Avg High8°C
Rain14days
Driest Month
3days
July
Avg High25°C
Avg Low15°C
Windiest Month
16 km/h
February (Gusts 34)
Sea Temperature
7°C – 17°C
Warmest water: August (
16.8°C
)
Worst Time to Visit
Consider avoiding January, February, December due to heavy rainfall.
Sun Position
Sunrise 05:12
Daylight 16.1h
Sunset 21:20
Live conditions—
Mill Bay on the map · live conditions
Mill Bay, Canada
- Continent
- Americas
- Country
- Canada
- City
- Mill Bay
- Population
- 7.2K
- Coordinates
- 48.65°, -123.55°
Seasonal Breakdown
Spring
Mar–May
Avg High 14°C
Avg Low 7°C
Rain 13 days/mo
Summer
Jun–Aug
Avg High 24°C
Avg Low 15°C
Rain 5 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 16°C
Avg Low 10°C
Rain 14 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 8°C
Avg Low 3°C
Rain 16 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 8°C / 3°C . Feb: 8°C / 3°C . Mar: 11°C / 4°C . Apr: 14°C / 7°C . May: 19°C / 10°C . Jun: 21°C / 13°C . Jul: 25°C / 15°C . Aug: 26°C / 17°C . Sep: 21°C / 14°C . Oct: 15°C / 10°C . Nov: 10°C / 6°C . Dec: 7°C / 4°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 181 mm. Feb: 108 mm. Mar: 110 mm. Apr: 86 mm. May: 45 mm. Jun: 39 mm. Jul: 13 mm. Aug: 22 mm. Sep: 66 mm. Oct: 134 mm. Nov: 192 mm. Dec: 188 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 88%. Feb: 82%. Mar: 83%. Apr: 78%. May: 76%. Jun: 73%. Jul: 71%. Aug: 72%. Sep: 80%. Oct: 85%. Nov: 88%. Dec: 89%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 15 km/h . Feb: 16 km/h . Mar: 15 km/h . Apr: 15 km/h . May: 13 km/h . Jun: 13 km/h . Jul: 12 km/h . Aug: 11 km/h . Sep: 12 km/h . Oct: 14 km/h . Nov: 16 km/h . Dec: 16 km/h .
Sunshine
Sunshine
Sunshine: Jan: 4h. Feb: 6h. Mar: 8h. Apr: 9h. May: 12h. Jun: 13h. Jul: 14h. Aug: 12h. Sep: 10h. Oct: 7h. Nov: 4h. Dec: 3h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 7°C . Feb: 7°C . Mar: 8°C . Apr: 9°C . May: 12°C . Jun: 14°C . Jul: 16°C . Aug: 17°C . Sep: 15°C . Oct: 12°C . Nov: 9°C . Dec: 8°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 1. Feb: UV 2. Mar: UV 3. Apr: UV 5. May: UV 6. Jun: UV 6. Jul: UV 7. Aug: UV 6. Sep: UV 4. Oct: UV 3. Nov: UV 1. Dec: UV 1.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 5 days. Feb: 6 days. Mar: 2 days. Apr: 0 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 1 days. Dec: 5 days.
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending drier by about 29 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Aug 2025 · 25°C | Aug · 26°C |
| Coldest month | Feb 2025 · 2°C | Feb · 3°C |
| Wettest month | Dec 2025 · 232 mm | Nov · 192 mm |
| Windiest month | Feb 2025 · 17 km/h | Feb · 16 km/h |
Month-by-Month Weather Table
January
Wet 
February
Poor March
Poor April
Fair May
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Good November
Wet December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 8°C / 3°C | 5°C / 0°C | 16days (181 mm) Wet | 4h Fair | 88% Very Muggy | 1.2 Low | Wet | View Details |
| February | 8°C / 3°C | 5°C / -1°C | 14days (108 mm) Wet | 5.6h Fair | 82% Humid | 1.7 Low | Poor | View Details |
| March | 11°C / 4°C | 8°C / 1°C | 16days (110 mm) Wet | 7.5h Good | 83% Humid | 3 Moderate | Poor | View Details |
| April | 14°C / 7°C | 12°C / 4°C | 14days (86 mm) Wet | 9.4h Good | 78% Humid | 4.9 Moderate | Fair | View Details |
| May | 19°C / 10°C | 18°C / 9°C | 9days (45 mm) Wet | 11.6h Excellent | 76% Humid | 5.9 High | Good | View Details |
| June best | 21°C / 13°C | 21°C / 12°C | 8days (39 mm) Wet | 12.6h Excellent | 73% Muggy | 6.3 High | Excellent | View Details |
| July best | 25°C / 15°C | 26°C / 16°C | 3days (13 mm) Excellent | 13.6h Excellent | 71% Muggy | 6.8 High | Excellent | View Details |
| August best | 26°C / 17°C | 27°C / 17°C | 4days (22 mm) Good | 12.3h Excellent | 72% Muggy | 5.8 High | Excellent | View Details |
| September best | 21°C / 14°C | 21°C / 14°C | 9days (66 mm) Wet | 9.7h Good | 80% Humid | 4.4 Moderate | Excellent | View Details |
| October | 15°C / 10°C | 14°C / 8°C | 14days (134 mm) Wet | 6.6h Fair | 85% Humid | 2.6 Moderate | Good | View Details |
| November | 10°C / 6°C | 8°C / 4°C | 18days (192 mm) Wet | 4.4h Fair | 88% Very Muggy | 1.4 Low | Wet | View Details |
| December | 7°C / 4°C | 5°C / 0°C | 19days (188 mm) Wet | 3.4h Poor | 89% Very Muggy | 0.9 Low | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Mill Bay are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Mill Bay, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Mill Bay is August, with average daytime highs of 26°C (78°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Mill Bay is February, with average overnight lows of 3°C (37°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Mill Bay is November, averaging 192mm of precipitation across 18 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Mill Bay runs through December, November, January, March, with the heaviest rainfall in December. Based on 10-year averages for Mill Bay.
Mill Bay receives approximately 101 sunshine hours per year. The sunniest month is July with around 14 hours. Based on climate data for Mill Bay.
The least favorable months to visit Mill Bay are January, February, December, primarily due to heavy rainfall. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Mill Bay is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Mill Bay is 80%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Sea temperatures in Summer average 11°C (52°F), which most swimmers will find too cold without a wetsuit.
Yes, Mill Bay receives snow. Months with snowfall average 4 snow days and 9 cm (4 in) of accumulation, with about 3 frost days during winter.
Average wind speeds in Mill Bay are 14 km/h (9 mph). The windiest month is February with peak winds reaching 16 km/h (10 mph) (gusts up to 34 km/h / 21 mph).
Mill Bay averages 4 clear-sky days per month with overall cloud cover around 63%. The clearest skies occur in July.
The annual average dew point in Mill Bay is 9°C (48°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Mill Bay has a Warm-Summer Mediterranean climate, classified as Csb under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Mill Bay ranges from 7°C (45°F) to 14°C (57°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Mill Bay. It earns a climate score of 8.4/10 with Excellent.
For June in Mill Bay, pack Umbrella, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. With average highs of 21°C (70°F) and 8 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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