Summerside, Canada experiences average highs of 10°C (50°F) and lows of 5°C (41°F) throughout the year. Rainfall is moderate, averaging about 11 rainy days per month. Average highs have warmed by 0.8°C (1.4°F) across the available records.
Summerside, Canada Weather & Climate 2026
Monthly climate averages for Summerside, 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
4.2/10
Best: July, August, September
UV Index
4
Low
Temperature 10°C / 5°C
Feels Like 7°C / 0°C
Rainy Days 11
Rainfall 88 mm
Sunshine 8 h
Humidity 76%
Wind Speed 28 km/h
Dew Point 4°C
Snow Days 10 days
Frost Days 19 days
Hottest Month
23°C
July
Avg Low 18°C
Rain 10 days
Coldest Month
-8°C
February
Avg High -2°C
Rain 11 days
Driest Month
8 days
September
Avg High 20°C
Avg Low 15°C
Windiest Month
32 km/h
December (Gusts 58)
Sea Temperature
-1°C – 22°C
Warmest water: August (
21.9°C
)
Worst Time to Visit
Consider avoiding January, February, November, December due to very cold temperatures, frequent rain.
Sun Position
Sunrise 05:38
Daylight 15.4h
Sunset 21:04
Live conditions —
Summerside on the map · live conditions
Summerside, Canada
- Continent
- Americas
- Country
- Canada
- City
- Summerside
- Population
- 14.8K
- Coordinates
- 46.39°, -63.79°
Seasonal Breakdown
Spring
Mar–May
Avg High 7°C
Avg Low 1°C
Rain 12 days/mo
Summer
Jun–Aug
Avg High 22°C
Avg Low 16°C
Rain 10 days/mo
2/3 best months
Autumn
Sep–Nov
Avg High 13°C
Avg Low 9°C
Rain 10 days/mo
1/3 best months
Winter
Dec–Feb
Avg High -1°C
Avg Low -6°C
Rain 12 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: -2°C / -7°C . Feb: -2°C / -8°C . Mar: 1°C / -4°C . Apr: 6°C / 1°C . May: 13°C / 6°C . Jun: 19°C / 13°C . Jul: 23°C / 18°C . Aug: 23°C / 18°C . Sep: 20°C / 15°C . Oct: 14°C / 9°C . Nov: 6°C / 2°C . Dec: 1°C / -4°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 100 mm. Feb: 86 mm. Mar: 90 mm. Apr: 78 mm. May: 74 mm. Jun: 97 mm. Jul: 78 mm. Aug: 80 mm. Sep: 81 mm. Oct: 88 mm. Nov: 110 mm. Dec: 89 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 78%. Feb: 77%. Mar: 78%. Apr: 77%. May: 75%. Jun: 77%. Jul: 76%. Aug: 74%. Sep: 74%. Oct: 74%. Nov: 76%. Dec: 76%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 31 km/h . Feb: 31 km/h . Mar: 30 km/h . Apr: 28 km/h . May: 26 km/h . Jun: 25 km/h . Jul: 23 km/h . Aug: 23 km/h . Sep: 26 km/h . Oct: 27 km/h . Nov: 32 km/h . Dec: 32 km/h .
Sunshine
Sunshine
Sunshine: Jan: 5h. Feb: 6h. Mar: 8h. Apr: 9h. May: 10h. Jun: 11h. Jul: 12h. Aug: 11h. Sep: 9h. Oct: 7h. Nov: 5h. Dec: 4h.
Sea Temperature
Sea Temperature swim
Line chart showing monthly sea temperature. Jan: -1°C . Feb: -1°C . Mar: 0°C . Apr: 3°C . May: 9°C . Jun: 16°C . Jul: 22°C . Aug: 22°C . Sep: 19°C . Oct: 14°C . Nov: 6°C . Dec: 1°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 4. Mar: UV 4. Apr: UV 5. May: UV 6. Jun: UV 6. Jul: UV 7. Aug: UV 6. Sep: UV 5. Oct: UV 3. Nov: UV 2. Dec: UV 2.
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: 14 days. Apr: 6 days. May: 1 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 5 days. Dec: 13 days.
Climate Trends
Average highs have warmed by 0.8°C (1.4°F) across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 24°C | Jul · 23°C |
| Coldest month | Feb 2025 · -9°C | Feb · -8°C |
| Wettest month | May 2025 · 103 mm | Nov · 110 mm |
| Windiest month | Dec 2025 · 35 km/h | Dec · 32 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Poor May
Fair June
Good July best
Excellent August best
Excellent September best
Excellent October
Fair November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | -2°C / -7°C | -7°C / -14°C | 13days (100 mm) Wet | 4.5h Fair | 78% Humid | 2 Low | Poor | View Details |
| February | -2°C / -8°C | -7°C / -15°C | 11days (86 mm) Wet | 6.4h Fair | 77% Humid | 3.8 Moderate | Poor | View Details |
| March | 1°C / -4°C | -4°C / -11°C | 12days (90 mm) Wet | 7.6h Good | 78% Humid | 4 Moderate | Poor | View Details |
| April | 6°C / 1°C | 3°C / -5°C | 12days (78 mm) Wet | 8.7h Good | 77% Humid | 4.8 Moderate | Poor | View Details |
| May | 13°C / 6°C | 10°C / 2°C | 11days (74 mm) Wet | 10.1h Excellent | 75% Muggy | 5.9 High | Fair | View Details |
| June | 19°C / 13°C | 18°C / 10°C | 11days (97 mm) Wet | 11h Excellent | 77% Humid | 6.2 High | Good | View Details |
| July best | 23°C / 18°C | 24°C / 17°C | 10days (78 mm) Wet | 11.6h Excellent | 76% Humid | 6.7 High | Excellent | View Details |
| August best | 23°C / 18°C | 24°C / 17°C | 10days (80 mm) Wet | 11h Excellent | 74% Muggy | 6 High | Excellent | View Details |
| September best | 20°C / 15°C | 18°C / 12°C | 8days (81 mm) Wet | 9h Good | 74% Muggy | 4.8 Moderate | Excellent | View Details |
| October | 14°C / 9°C | 11°C / 6°C | 10days (88 mm) Wet | 7.1h Good | 74% Muggy | 3.1 Moderate | Fair | View Details |
| November | 6°C / 2°C | 2°C / -4°C | 13days (110 mm) Wet | 4.7h Fair | 76% Humid | 1.6 Low | Poor | View Details |
| December | 1°C / -4°C | -4°C / -10°C | 13days (89 mm) Wet | 4.2h Fair | 76% Humid | 1.5 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Summerside are July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Summerside, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Summerside is July, with average daytime highs of 23°C (74°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Summerside is February, with average overnight lows of -8°C (17°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Summerside is November, averaging 110mm of precipitation across 13 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Summerside runs through January, November, December, March, with the heaviest rainfall in January. Based on 10-year averages for Summerside.
Summerside receives approximately 96 sunshine hours per year. The sunniest month is July with around 12 hours. Based on climate data for Summerside.
The least favorable months to visit Summerside are January, February, November, December, primarily due to very cold temperatures, frequent rain. For the best conditions, consider July, August, September instead.
The annual average UV index in Summerside is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Summerside is 76%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Sea temperatures in Summer average 9°C (48°F), which most swimmers will find too cold without a wetsuit.
Yes, Summerside receives snow. Months with snowfall average 10 snow days and 25 cm (10 in) of accumulation, with about 19 frost days during winter.
Average wind speeds in Summerside are 28 km/h (17 mph). The windiest month is December with peak winds reaching 32 km/h (20 mph) (gusts up to 58 km/h / 36 mph).
Summerside averages 3 clear-sky days per month with overall cloud cover around 65%. The clearest skies occur in September.
The annual average dew point in Summerside is 4°C (39°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Summerside 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 Summerside ranges from 0°C (32°F) to 7°C (45°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 Summerside. It earns a climate score of 8.8/10 with Excellent.
For July in Summerside, pack Umbrella, Waterproof jacket, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. With average highs of 23°C (74°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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