Duncan, Canada experiences average highs of 15°C (59°F) and lows of 8°C (46°F) throughout the year. Rainfall is frequent, averaging about 13 rainy days per month. Average highs have stayed broadly stable across the available records.
Duncan, Canada Weather & Climate 2026
Monthly climate averages for Duncan, Canada. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: May–Oct 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.3/10
Best: June, July, August, September
UV Index
4
Low
Temperature 15°C / 8°C
Feels Like 15°C / 6°C
Rainy Days 13
Rainfall 120 mm
Sunshine 8 h
Humidity 79%
Wind Speed 10 km/h
Dew Point 8°C
Snow Days 9 days
Frost Days 6 days
Hottest Month
27°C
August
Avg Low17°C
Rain4days
Coldest Month
1°C
February
Avg High7°C
Rain15days
Driest Month
3days
July
Avg High26°C
Avg Low16°C
Windiest Month
12 km/h
April (Gusts 36)
Worst Time to Visit
Consider avoiding January, February, November, December due to heavy rainfall.
Sun Position
Sunrise 05:12
Daylight 16.1h
Sunset 21:21
Live conditions—
Duncan on the map · live conditions
Duncan, Canada
- Continent
- Americas
- Country
- Canada
- City
- Duncan
- Population
- 22.2K
- Coordinates
- 48.78°, -123.70°
Seasonal Breakdown
Spring
Mar–May
Avg High 15°C
Avg Low 6°C
Rain 15 days/mo
Summer
Jun–Aug
Avg High 25°C
Avg Low 15°C
Rain 5 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 15°C
Avg Low 9°C
Rain 14 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 7°C
Avg Low 2°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: 7°C / 2°C . Feb: 7°C / 1°C . Mar: 11°C / 3°C . Apr: 14°C / 6°C . May: 19°C / 10°C . Jun: 22°C / 13°C . Jul: 26°C / 16°C . Aug: 27°C / 17°C . Sep: 22°C / 13°C . Oct: 15°C / 9°C . Nov: 10°C / 5°C . Dec: 6°C / 2°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 223 mm. Feb: 126 mm. Mar: 138 mm. Apr: 107 mm. May: 55 mm. Jun: 46 mm. Jul: 15 mm. Aug: 25 mm. Sep: 89 mm. Oct: 166 mm. Nov: 228 mm. Dec: 221 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 89%. Feb: 83%. Mar: 83%. Apr: 77%. May: 73%. Jun: 70%. Jul: 66%. Aug: 67%. Sep: 77%. Oct: 85%. Nov: 90%. Dec: 91%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 10 km/h . Feb: 11 km/h . Mar: 11 km/h . Apr: 12 km/h . May: 10 km/h . Jun: 11 km/h . Jul: 9 km/h . Aug: 9 km/h . Sep: 9 km/h . Oct: 10 km/h . Nov: 11 km/h . Dec: 10 km/h .
Sunshine
Sunshine
Sunshine: Jan: 4h. Feb: 5h. Mar: 7h. Apr: 9h. May: 11h. Jun: 12h. Jul: 13h. 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 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: 10 days. Feb: 12 days. Mar: 11 days. Apr: 4 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 5 days. Dec: 11 days.
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending drier by about 40 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 27°C | Aug · 27°C |
| Coldest month | Feb 2025 · 0°C | Feb · 1°C |
| Wettest month | Dec 2025 · 279 mm | Nov · 228 mm |
| Windiest month | Dec 2025 · 12 km/h | Apr · 12 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 | 7°C / 2°C | 5°C / -1°C | 17days (223 mm) Wet | 3.7h Poor | 89% Very Muggy | 1.2 Low | Wet | View Details |
| February | 7°C / 1°C | 5°C / -2°C | 15days (126 mm) Wet | 5.3h Fair | 83% Humid | 1.7 Low | Poor | View Details |
| March | 11°C / 3°C | 8°C / 0°C | 17days (138 mm) Wet | 7.2h Good | 83% Humid | 3 Moderate | Poor | View Details |
| April | 14°C / 6°C | 13°C / 4°C | 16days (107 mm) Wet | 9.2h Good | 77% Humid | 4.8 Moderate | Fair | View Details |
| May | 19°C / 10°C | 19°C / 9°C | 11days (55 mm) Wet | 11.3h Excellent | 73% Muggy | 5.9 High | Good | View Details |
| June best | 22°C / 13°C | 22°C / 12°C | 9days (46 mm) Wet | 12.2h Excellent | 70% Muggy | 6.3 High | Excellent | View Details |
| July best | 26°C / 16°C | 27°C / 16°C | 3days (15 mm) Excellent | 13.3h Excellent | 66% Muggy | 6.8 High | Excellent | View Details |
| August best | 27°C / 17°C | 28°C / 17°C | 4days (25 mm) Good | 12.1h Excellent | 67% Muggy | 5.8 High | Excellent | View Details |
| September best | 22°C / 13°C | 22°C / 13°C | 9days (89 mm) Wet | 9.4h Good | 77% Humid | 4.4 Moderate | Excellent | View Details |
| October | 15°C / 9°C | 14°C / 7°C | 14days (166 mm) Wet | 6.4h Fair | 85% Humid | 2.6 Moderate | Fair | View Details |
| November | 10°C / 5°C | 8°C / 3°C | 18days (228 mm) Wet | 4.1h Fair | 90% Very Muggy | 1.3 Low | Wet | View Details |
| December | 6°C / 2°C | 4°C / -1°C | 20days (221 mm) Wet | 3.1h Poor | 91% Very Muggy | 0.8 Low | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Duncan are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Duncan, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Duncan is August, with average daytime highs of 27°C (81°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Duncan is February, with average overnight lows of 1°C (34°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Duncan is November, averaging 228mm of precipitation across 18 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Duncan runs through December, November, January, March, with the heaviest rainfall in December. Based on 10-year averages for Duncan.
Duncan receives approximately 97 sunshine hours per year. The sunniest month is July with around 13 hours. Based on climate data for Duncan.
The least favorable months to visit Duncan are January, February, November, December, primarily due to heavy rainfall. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Duncan is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Duncan is 79%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Duncan receives snow. Months with snowfall average 9 snow days and 18 cm (7 in) of accumulation, with about 6 frost days during winter.
Average wind speeds in Duncan are 10 km/h (6 mph). The windiest month is April with peak winds reaching 12 km/h (7 mph) (gusts up to 36 km/h / 23 mph).
Duncan averages 4 clear-sky days per month with overall cloud cover around 66%. The clearest skies occur in July.
The annual average dew point in Duncan is 8°C (46°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Duncan 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 Duncan ranges from 6°C (43°F) to 15°C (59°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 Duncan. It earns a climate score of 8.3/10 with Excellent.
For June in Duncan, pack Umbrella, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. With average highs of 22°C (72°F) and 9 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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