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Summerside climate by month
What the weather is like
Summerside has a warm-summer humid continental climate (Köppen Dfb): warm summers, cold winters and precipitation in every season.
The warmest month is July, when afternoons average 23° and nights 15°. February is the coolest month, with highs of -3° and lows of -11°. The difference between the warmest and the coolest month is about 26°, a large swing typical of continental interiors.
About 1,095 mm of precipitation falls in an average year. June is the wettest month (103 mm, 16 wet days) and September the driest (100 mm, 10 wet days). Cloud cover ranges from 35% in August to 55% in December.
The sea reaches about 19° in August. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Compared with Ottawa, the capital, Summerside is 4.1° cooler on a July afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 23° · July
- Coldest nights
- -11° · February
- Wettest month
- June
- Driest month
- September
- Clearest skies
- August · 35% cloud
- Warmest sea
- 19° · August
- Longest day
- 15 h 47 min
- Shortest day
- 8 h 37 min
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columns, sea temperature lineTemperature curve
Average high, low and seaDaylight
Hours between sunrise and sunset on the 15th of each monthClimate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | -3° | -3° | 1° | 6° | 13° | 18° | 23° | 23° | 19° | 13° | 7° | 1° |
| Average low | -10° | -11° | -7° | -1° | 4° | 10° | 15° | 15° | 12° | 6° | 1° | -5° |
| Precipitation | 86 mm | 72 mm | 79 mm | 83 mm | 89 mm | 103 mm | 80 mm | 95 mm | 100 mm | 108 mm | 103 mm | 97 mm |
| Wet days (≥1 mm) | 12.5 | 10.7 | 14.2 | 12.5 | 13.7 | 15.8 | 15 | 11.7 | 9.7 | 11.3 | 14 | 14.8 |
| Cloud cover | 52% | 48% | 47% | 48% | 45% | 41% | 37% | 35% | 37% | 44% | 51% | 55% |
| Sea temperature | 0° | -1° | -1° | 1° | 6° | 12° | 17° | 19° | 17° | 13° | 7° | 2° |
| Daylight | 9h 00 | 10h 21 | 11h 52 | 13h 33 | 14h 59 | 15h 47 | 15h 27 | 14h 12 | 12h 35 | 10h 57 | 9h 26 | 8h 37 |
| Month score | 19 | 25 | 18 | 21 | 33 | 62 | 64 | 70 | 74 | 42 | 16 | 15 |