April is one of the cooler months of the year in Summerside, with average highs near 6.1°C and lows around -0.6°C (mean 2.8°C). It is about average for rainfall, averaging 77 mm of rainfall and 84% relative humidity across the period.
April is one of the cooler months of the year in Summerside. Across 45 years of records, the warmest April in Summerside was 2012 — when the month averaged 5°C — while the coldest was 2015 at -0.1°C. Typical April days reach 6.1°C with nights near -0.6°C. The long-term April temperature trend is broadly flat.
April is about average for rainfall in Summerside, averaging 77 mm of rainfall. The wettest April on record was 2019 with 152 mm, while the driest was 1992 at 27 mm.
Relative humidity in Summerside during April averages 84%. The most humid April was 1983 at 91%, and the least humid was 2020 at 79%.
April receives about 4.3 kWh/m²/day of solar energy in Summerside. The sunniest April was 2020 at 5.1 kWh/m²/day, and the cloudiest was 2000 at 3.5.
Average wind speed in Summerside during April is 4 m/s. The windiest April was 1982 at 5.3 m/s, while the calmest were 2008, 2017 and 2023, among others at 3.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 2.6°C | 2.5°C | 2.7°C | 2.8°C | 3.3°C | +0.7°C |
| Avg High | 6.0°C | 5.9°C | 6.0°C | 6.2°C | 6.5°C | +0.5°C |
| Avg Low | -0.7°C | -1.0°C | -0.6°C | -0.5°C | 0.1°C | +0.8°C |
| Avg Rain | 92 mm | 59 mm | 93 mm | 77 mm | 63 mm | -29 mm |
April temperatures in Summerside have risen by about 1.2°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -11.4°C (2015) to a record high of 19.4°C (2004).
Rainfall in April is about average for rainfall, averaging 77 mm, with a wettest year of 152 mm.
A good time to visit Summerside
April is a good time to visit Summerside, with days averaging 6.1°C and nights around -0.6°C (mean 2.8°C, cooler than Summerside's yearly average) and moderate rainfall. August and July are marginally more temperate, but April still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 6.3°C | 3.2°C | 0.2°C | 13.5°C | -4.9°C | 87 mm | 83% | 4.1 m/s | 3.9 |
| 2024 | 7.0°C | 3.7°C | 0.4°C | 13.0°C | -2.7°C | 49 mm | 82% | 4.1 m/s | 4.8 |
| 2023 | 7.0°C | 3.4°C | -0.3°C | 12.8°C | -5.5°C | 31 mm | 84% | 3.4 m/s | 4.7 |
| 2022 | 6.5°C | 3.5°C | 0.4°C | 10.8°C | -2.4°C | 85 mm | 86% | 4.2 m/s | 4.2 |
| 2021 | 6.6°C | 3.8°C | 1.0°C | 16.3°C | -2.7°C | 86 mm | 88% | 4.3 m/s | 4.1 |
| 2020 | 5.6°C | 2.3°C | -0.9°C | 10.5°C | -3.3°C | 38 mm | 79% | 4.2 m/s | 5.1 |
| 2019 🌧️ | 5.4°C | 2.4°C | -0.6°C | 14.2°C | -5.4°C | 152 mm | 85% | 4.6 m/s | 4 |
| 2018 | 5.8°C | 2.2°C | -1.4°C | 14.7°C | -7.0°C | 73 mm | 81% | 4 m/s | 4.3 |
| 2017 | 6.8°C | 3.4°C | 0.0°C | 16.0°C | -5.4°C | 62 mm | 86% | 3.4 m/s | 4.5 |
| 2016 | 5.5°C | 1.9°C | -1.7°C | 13.0°C | -8.9°C | 58 mm | 80% | 4.1 m/s | 4.8 |
| 2015 ❄️ | 2.8°C | -0.1°C | -3.0°C | 9.5°C | -11.4°C | 99 mm | 87% | 3.9 m/s | 4 |
| 2014 | 5.7°C | 2.4°C | -1.0°C | 15.3°C | -5.0°C | 97 mm | 86% | 4.2 m/s | 3.8 |
| 2013 | 6.5°C | 3.0°C | -0.6°C | 16.0°C | -4.8°C | 39 mm | 81% | 4 m/s | 4.5 |
| 2012 🔥 | 8.6°C | 5.0°C | 1.4°C | 17.0°C | -3.2°C | 61 mm | 84% | 4 m/s | 4.6 |
| 2011 | 6.8°C | 3.5°C | 0.2°C | 16.7°C | -3.8°C | 71 mm | 84% | 4.1 m/s | 4.1 |
| 2010 | 8.0°C | 4.8°C | 1.7°C | 14.5°C | -1.0°C | 56 mm | 87% | 3.6 m/s | 4.3 |
| 2009 | 6.8°C | 3.6°C | 0.4°C | 17.8°C | -5.8°C | 85 mm | 85% | 4.1 m/s | 4.6 |
| 2008 | 6.7°C | 3.1°C | -0.5°C | 14.6°C | -5.0°C | 61 mm | 86% | 3.4 m/s | 4.5 |
| 2007 | 4.5°C | 1.6°C | -1.3°C | 14.8°C | -5.4°C | 67 mm | 83% | 4.4 m/s | 4.3 |
| 2006 | 6.8°C | 3.5°C | 0.1°C | 14.2°C | -2.2°C | 140 mm | 83% | 4.1 m/s | 4.2 |
| 2005 | 7.2°C | 3.5°C | -0.2°C | 13.3°C | -3.2°C | 79 mm | 83% | 3.8 m/s | 4.6 |
| 2004 | 6.4°C | 3.0°C | -0.3°C | 19.4°C | -2.5°C | 101 mm | 86% | 3.6 m/s | 3.7 |
| 2003 | 5.0°C | 1.3°C | -2.4°C | 15.6°C | -8.5°C | 98 mm | 82% | 3.6 m/s | 4.6 |
| 2002 | 5.6°C | 2.5°C | -0.5°C | 11.5°C | -2.6°C | 126 mm | 82% | 4.3 m/s | 3.8 |
| 2001 | 4.3°C | 1.6°C | -1.2°C | 14.1°C | -5.6°C | 96 mm | 85% | 4 m/s | 3.8 |
| 2000 | 6.3°C | 3.3°C | 0.3°C | 14.2°C | -2.7°C | 72 mm | 84% | 4.1 m/s | 3.5 |
| 1999 | 5.5°C | 2.6°C | -0.4°C | 12.0°C | -4.0°C | 62 mm | 83% | 4.3 m/s | 4.3 |
| 1998 | 6.6°C | 3.6°C | 0.5°C | 16.1°C | -2.2°C | 78 mm | 84% | 4.2 m/s | 3.8 |
| 1997 | 3.8°C | 1.0°C | -1.9°C | 9.5°C | -7.3°C | 51 mm | 83% | 4.8 m/s | 4.4 |
| 1996 | 6.4°C | 3.0°C | -0.5°C | 14.4°C | -4.8°C | 83 mm | 86% | 4 m/s | 3.9 |
| 1995 | 5.9°C | 1.9°C | -2.0°C | 12.5°C | -10.6°C | 43 mm | 82% | 3.5 m/s | 4 |
| 1994 | 7.9°C | 3.8°C | -0.3°C | 15.3°C | -9.6°C | 57 mm | 80% | 3.8 m/s | 4.4 |
| 1993 | 6.5°C | 2.7°C | -1.1°C | 14.6°C | -6.6°C | 50 mm | 83% | 3.8 m/s | 4.3 |
| 1992 | 5.0°C | 1.4°C | -2.2°C | 13.5°C | -6.7°C | 27 mm | 80% | 4.3 m/s | 5 |
| 1991 | 5.2°C | 1.8°C | -1.6°C | 13.2°C | -5.1°C | 47 mm | 84% | 3.4 m/s | 4.9 |
| 1990 | 6.5°C | 3.0°C | -0.4°C | 17.1°C | -3.5°C | 91 mm | 85% | 3.9 m/s | 4 |
| 1989 | 6.3°C | 3.0°C | -0.3°C | 14.6°C | -3.0°C | 68 mm | 85% | 3.6 m/s | 4.5 |
| 1988 | 5.1°C | 2.2°C | -0.7°C | 10.1°C | -3.8°C | 115 mm | 88% | 4.7 m/s | 3.7 |
| 1987 | 7.7°C | 3.6°C | -0.6°C | 15.2°C | -3.9°C | 63 mm | 87% | 3.5 m/s | 4.3 |
| 1986 | 6.5°C | 3.3°C | 0.0°C | 13.0°C | -4.0°C | 109 mm | 88% | 3.6 m/s | 3.9 |
| 1985 | 4.8°C | 1.5°C | -1.8°C | 14.0°C | -7.5°C | 38 mm | 81% | 4.3 m/s | 4.5 |
| 1984 | 4.7°C | 1.6°C | -1.4°C | 13.7°C | -5.1°C | 151 mm | 90% | 4.6 m/s | 4.4 |
| 1983 | 6.9°C | 3.7°C | 0.6°C | 15.6°C | -5.4°C | 87 mm | 91% | 3.7 m/s | — |
| 1982 | 5.2°C | 1.9°C | -1.3°C | 12.6°C | -7.4°C | 110 mm | 86% | 5.3 m/s | — |
| 1981 | 6.5°C | 3.0°C | -0.5°C | 12.3°C | -8.0°C | 83 mm | 84% | 4.6 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 6.1°C with lows near -0.6°C (mean 2.8°C), based on 45 years of NASA POWER data.
April averages 77 mm of rainfall in Summerside, about average for rainfall. The wettest on record was 152 mm in 2019.
The hottest April reached 19.4°C in 2004. The coldest dipped to -11.4°C in 2015.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 1.2°C. Daytime highs moved from 5.6°C to 6.7°C and overnight lows from -0.9°C to 0.3°C over the same span.
April is one of the cooler months of the year in Summerside and about average for rainfall, so plan for around 6.1°C daytime highs and -0.6°C at night.
Not quite — April is the 5th coolest month in Summerside, averaging 2.8°C.
For April in Summerside, pack warm layers and a jacket for chilly mornings, with typical highs of 6.1°C and lows of -0.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 84% — quite humid.
Average wind speed in April is 4 m/s. The windiest April on record averaged 5.3 m/s (1982).
The wettest April on record was 2019 with 152 mm. On average, April sees 77 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Summerside behaves each April, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for April specifically, along with year-by-year records and how the month has changed over the decades.
