Chemainus, Canada experiences average highs of 15°C (59°F) and lows of 7°C (45°F) throughout the year. Rainfall is frequent, averaging about 13 rainy days per month. Average highs have stayed broadly stable across the available records.
Chemainus, Canada Weather & Climate 2026
Monthly climate averages for Chemainus, 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
5.1/10
Best: June, July, August, September
UV Index
4
Low
Temperature 15°C / 7°C
Feels Like 14°C / 5°C
Rainy Days 13
Rainfall 113 mm
Sunshine 8 h
Humidity 78%
Wind Speed 11 km/h
Dew Point 7°C
Snow Days 5 days
Frost Days 6 days
Hottest Month
26°C
August
Avg Low16°C
Rain5days
Coldest Month
1°C
February
Avg High7°C
Rain14days
Driest Month
5days
July
Avg High26°C
Avg Low15°C
Windiest Month
13 km/h
December (Gusts 33)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures, heavy rainfall.
Sun Position
Sunrise 05:12
Daylight 16.2h
Sunset 21:22
Live conditions—
Chemainus on the map · live conditions
Chemainus, Canada
- Continent
- Americas
- Country
- Canada
- City
- Chemainus
- Population
- 3K
- Coordinates
- 48.92°, -123.72°
Seasonal Breakdown
Spring
Mar–May
Avg High 14°C
Avg Low 6°C
Rain 15 days/mo
Summer
Jun–Aug
Avg High 24°C
Avg Low 14°C
Rain 7 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 15°C
Avg Low 8°C
Rain 14 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 6°C
Avg Low 1°C
Rain 17 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: 6°C / 1°C . Feb: 7°C / 1°C . Mar: 10°C / 2°C . Apr: 14°C / 5°C . May: 19°C / 9°C . Jun: 21°C / 12°C . Jul: 26°C / 15°C . Aug: 26°C / 16°C . Sep: 21°C / 13°C . Oct: 14°C / 8°C . Nov: 9°C / 4°C . Dec: 6°C / 1°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 207 mm. Feb: 115 mm. Mar: 126 mm. Apr: 101 mm. May: 61 mm. Jun: 55 mm. Jul: 22 mm. Aug: 25 mm. Sep: 84 mm. Oct: 144 mm. Nov: 211 mm. Dec: 201 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 88%. Feb: 82%. Mar: 82%. Apr: 76%. May: 72%. Jun: 69%. Jul: 66%. Aug: 67%. Sep: 76%. Oct: 84%. Nov: 89%. Dec: 89%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 12 km/h . Feb: 12 km/h . Mar: 12 km/h . Apr: 12 km/h . May: 10 km/h . Jun: 10 km/h . Jul: 9 km/h . Aug: 9 km/h . Sep: 10 km/h . Oct: 12 km/h . Nov: 13 km/h . Dec: 13 km/h .
Sunshine
Sunshine
Sunshine: Jan: 4h. Feb: 5h. Mar: 7h. Apr: 9h. May: 12h. Jun: 13h. Jul: 14h. Aug: 12h. Sep: 9h. Oct: 6h. Nov: 4h. Dec: 3h.
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 7. 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: 7 days. Feb: 7 days. Mar: 5 days. Apr: 1 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 3 days. Dec: 8 days.
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending drier by about 31 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 27°C | Aug · 26°C |
| Coldest month | Feb 2025 · -1°C | Feb · 1°C |
| Wettest month | Dec 2025 · 236 mm | Nov · 211 mm |
| Windiest month | Dec 2025 · 13 km/h | Dec · 13 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
Fair November
Wet December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 6°C / 1°C | 4°C / -2°C | 17days (207 mm) Wet | 3.8h Poor | 88% Very Muggy | 1.2 Low | Wet | View Details |
| February | 7°C / 1°C | 4°C / -3°C | 14days (115 mm) Wet | 5.4h Fair | 82% Humid | 1.8 Low | Poor | View Details |
| March | 10°C / 2°C | 7°C / -1°C | 17days (126 mm) Wet | 7.3h Good | 82% Humid | 3.1 Moderate | Poor | View Details |
| April | 14°C / 5°C | 12°C / 3°C | 16days (101 mm) Wet | 9.3h Good | 76% Humid | 4.7 Moderate | Fair | View Details |
| May | 19°C / 9°C | 18°C / 8°C | 11days (61 mm) Wet | 11.6h Excellent | 72% Muggy | 6 High | Good | View Details |
| June best | 21°C / 12°C | 21°C / 11°C | 10days (55 mm) Wet | 12.5h Excellent | 69% Muggy | 6.5 High | Excellent | View Details |
| July best | 26°C / 15°C | 26°C / 15°C | 5days (22 mm) Good | 13.5h Excellent | 66% Muggy | 6.9 High | Excellent | View Details |
| August best | 26°C / 16°C | 27°C / 16°C | 5days (25 mm) Good | 12.2h Excellent | 67% Muggy | 5.9 High | Excellent | View Details |
| September best | 21°C / 13°C | 21°C / 12°C | 10days (84 mm) Wet | 9.4h Good | 76% Humid | 4.4 Moderate | Excellent | View Details |
| October | 14°C / 8°C | 13°C / 6°C | 14days (144 mm) Wet | 6.4h Fair | 84% Humid | 2.6 Moderate | Fair | View Details |
| November | 9°C / 4°C | 7°C / 2°C | 18days (211 mm) Wet | 4.1h Fair | 89% Very Muggy | 1.4 Low | Wet | View Details |
| December | 6°C / 1°C | 3°C / -2°C | 19days (201 mm) Wet | 3.2h Poor | 89% Very Muggy | 0.9 Low | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Chemainus are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Chemainus, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Chemainus is August, with average daytime highs of 26°C (79°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Chemainus is February, with average overnight lows of 1°C (33°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Chemainus is November, averaging 211mm of precipitation across 18 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Chemainus runs through December, November, January, March, with the heaviest rainfall in December. Based on 10-year averages for Chemainus.
Chemainus receives approximately 99 sunshine hours per year. The sunniest month is July with around 14 hours. Based on climate data for Chemainus.
The least favorable months to visit Chemainus are January, February, March, December, primarily due to very cold temperatures, heavy rainfall. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Chemainus is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Chemainus is 78%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Chemainus receives snow. Months with snowfall average 5 snow days and 10 cm (4 in) of accumulation, with about 6 frost days during winter.
Average wind speeds in Chemainus are 11 km/h (7 mph). The windiest month is December with peak winds reaching 13 km/h (8 mph) (gusts up to 33 km/h / 20 mph).
Chemainus averages 4 clear-sky days per month with overall cloud cover around 63%. The clearest skies occur in August.
The annual average dew point in Chemainus is 7°C (45°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Chemainus 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 Chemainus ranges from 5°C (41°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 Chemainus. It earns a climate score of 8.2/10 with Excellent.
For June in Chemainus, pack Warm evening layer, Umbrella, Waterproof jacket, Sunscreen (SPF 30+), Sunglasses. With average highs of 21°C (71°F) and 10 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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