Carleton, Canada experiences average highs of 9°C (48°F) and lows of 1°C (34°F) throughout the year. Rainfall is moderate, averaging about 11 rainy days per month. Average highs have warmed by 0.9°C (1.6°F) across the available records.
Carleton, Canada Weather & Climate 2026
Monthly climate averages for Carleton, Canada. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Nov 
Wetter season: Mar–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
4.1/10
Best: June, July, August, September
UV Index
4
Low
Temperature 9°C / 1°C
Feels Like 6°C / -3°C
Rainy Days 11
Rainfall 94 mm
Sunshine 8 h
Humidity 78%
Wind Speed 18 km/h
Dew Point 1°C
Snow Days 10 days
Frost Days 21 days
Hottest Month
24°C
July
Avg Low 16°C
Rain 13 days
Coldest Month
-14°C
January
Avg High -6°C
Rain 10 days
Driest Month
9 days
September
Avg High 19°C
Avg Low 10°C
Windiest Month
20 km/h
December (Gusts 43)
Sea Temperature
-1°C – 20°C
Warmest water: July (
19.7°C
)
Worst Time to Visit
Consider avoiding March, April, November, December due to very cold temperatures, frequent rain.
Sun Position
Sunrise 04:40
Daylight 15.7h
Sunset 20:20
Live conditions —
Carleton on the map · live conditions
Carleton, Canada
- Continent
- Americas
- Country
- Canada
- City
- Carleton
- Population
- 1.1K
- Coordinates
- 48.10°, -66.12°
Seasonal Breakdown
Spring
Mar–May
Avg High 6°C
Avg Low -2°C
Rain 12 days/mo
Summer
Jun–Aug
Avg High 23°C
Avg Low 14°C
Rain 12 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 11°C
Avg Low 4°C
Rain 10 days/mo
1/3 best months
Winter
Dec–Feb
Avg High -5°C
Avg Low -13°C
Rain 11 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
High Low Shaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: -6°C / -14°C . Feb: -5°C / -14°C . Mar: 0°C / -8°C . Apr: 5°C / -3°C . May: 14°C / 4°C . Jun: 21°C / 11°C . Jul: 24°C / 16°C . Aug: 23°C / 15°C . Sep: 19°C / 10°C . Oct: 12°C / 5°C . Nov: 3°C / -3°C . Dec: -3°C / -11°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 85 mm. Feb: 77 mm. Mar: 101 mm. Apr: 91 mm. May: 91 mm. Jun: 94 mm. Jul: 88 mm. Aug: 94 mm. Sep: 104 mm. Oct: 96 mm. Nov: 103 mm. Dec: 103 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 77%. Feb: 75%. Mar: 76%. Apr: 77%. May: 75%. Jun: 76%. Jul: 78%. Aug: 79%. Sep: 80%. Oct: 81%. Nov: 78%. Dec: 78%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 19 km/h . Feb: 20 km/h . Mar: 20 km/h . Apr: 19 km/h . May: 18 km/h . Jun: 17 km/h . Jul: 16 km/h . Aug: 15 km/h . Sep: 16 km/h . Oct: 17 km/h . Nov: 20 km/h . Dec: 20 km/h .
Sunshine
Sunshine
Sunshine: Jan: 5h. Feb: 7h. Mar: 8h. Apr: 9h. May: 10h. Jun: 11h. Jul: 12h. Aug: 11h. Sep: 8h. Oct: 6h. Nov: 5h. Dec: 5h.
Sea Temperature
Sea Temperature swim
Line chart showing monthly sea temperature. Jan: -1°C . Feb: -1°C . Mar: -1°C . Apr: 1°C . May: 7°C . Jun: 15°C . Jul: 20°C . Aug: 19°C . Sep: 18°C . Oct: 13°C . Nov: 5°C . Dec: 0°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 4. Apr: UV 5. May: UV 6. Jun: UV 6. Jul: UV 6. Aug: UV 6. Sep: UV 5. Oct: UV 3. Nov: UV 2. Dec: UV 1.
Monthly Daylight Hours
Daylight 12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow Days Snowfall
Snow Days: Jan: 16 days. Feb: 14 days. Mar: 15 days. Apr: 8 days. May: 2 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 1 days. Nov: 11 days. Dec: 14 days.
Climate Trends
Average highs have warmed by 0.9°C (1.6°F) across the available records. Average rainfall is trending drier by about 18 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 25°C | Jul · 24°C |
| Coldest month | Feb 2025 · -15°C | Jan · -14°C |
| Wettest month | Apr 2025 · 131 mm | Sep · 104 mm |
| Windiest month | Feb 2025 · 23 km/h | Dec · 20 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Poor May
Fair June best
Excellent July best
Excellent August best
Excellent September best
Good October
Fair November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | -6°C / -14°C | -11°C / -20°C | 10days (85 mm) Wet | 5.3h Fair | 77% Humid | 1.7 Low | Poor | View Details |
| February | -5°C / -14°C | -11°C / -20°C | 10days (77 mm) Wet | 6.8h Fair | 75% Muggy | 3.2 Moderate | Poor | View Details |
| March | 0°C / -8°C | -5°C / -14°C | 13days (101 mm) Wet | 7.8h Good | 76% Humid | 3.7 Moderate | Poor | View Details |
| April | 5°C / -3°C | 2°C / -7°C | 11days (91 mm) Wet | 8.7h Good | 77% Humid | 4.9 Moderate | Poor | View Details |
| May | 14°C / 4°C | 12°C / 1°C | 11days (91 mm) Wet | 9.6h Good | 75% Muggy | 5.5 High | Fair | View Details |
| June best | 21°C / 11°C | 20°C / 10°C | 12days (94 mm) Wet | 10.6h Excellent | 76% Humid | 5.8 High | Excellent | View Details |
| July best | 24°C / 16°C | 25°C / 16°C | 13days (88 mm) Wet | 11.5h Excellent | 78% Humid | 6.4 High | Excellent | View Details |
| August best | 23°C / 15°C | 24°C / 14°C | 12days (94 mm) Wet | 10.6h Excellent | 79% Humid | 5.6 High | Excellent | View Details |
| September best | 19°C / 10°C | 18°C / 8°C | 9days (104 mm) Wet | 8.2h Good | 80% Humid | 4.7 Moderate | Good | View Details |
| October | 12°C / 5°C | 10°C / 1°C | 11days (96 mm) Wet | 6.4h Fair | 81% Humid | 2.8 Moderate | Fair | View Details |
| November | 3°C / -3°C | -1°C / -8°C | 11days (103 mm) Wet | 5.2h Fair | 78% Humid | 1.6 Low | Poor | View Details |
| December | -3°C / -11°C | -8°C / -16°C | 12days (103 mm) Wet | 4.8h Fair | 78% Humid | 1.3 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Carleton are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Carleton, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Carleton is July, with average daytime highs of 24°C (76°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Carleton is January, with average overnight lows of -14°C (6°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Carleton is September, averaging 104mm of precipitation across 9 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Carleton runs through March, July, June, August, with the heaviest rainfall in March. Based on 10-year averages for Carleton.
Carleton receives approximately 96 sunshine hours per year. The sunniest month is July with around 12 hours. Based on climate data for Carleton.
The least favorable months to visit Carleton are March, April, November, December, primarily due to very cold temperatures, frequent rain. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Carleton is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Carleton is 78%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Sea temperatures in Summer average 8°C (46°F), which most swimmers will find too cold without a wetsuit.
Yes, Carleton receives snow. Months with snowfall average 10 snow days and 32 cm (13 in) of accumulation, with about 21 frost days during winter.
Average wind speeds in Carleton are 18 km/h (11 mph). The windiest month is December with peak winds reaching 20 km/h (13 mph) (gusts up to 43 km/h / 27 mph).
Carleton averages 3 clear-sky days per month with overall cloud cover around 62%. The clearest skies occur in September.
The annual average dew point in Carleton is 1°C (34°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Carleton has a Warm-Summer Continental climate, classified as Dfb under the Köppen system. Continental climates experience extreme temperature ranges — hot summers and cold, snowy winters.
The 'feels like' temperature in Carleton ranges from -3°C (27°F) to 6°C (43°F) on average. Wind chill makes winters feel noticeably colder than the actual temperature — layered clothing is recommended.
Yes, July is a great time to visit Carleton. It earns a climate score of 8.5/10 with Excellent.
For July in Carleton, pack Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 24°C (76°F) and 13 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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