March is one of the cooler months of the year in Summerside, with average highs near 0.6°C and lows around -6.1°C (mean -2.7°C). It is about average for rainfall, averaging 79 mm of rainfall and 86% relative humidity across the period.
March is one of the cooler months of the year in Summerside. Across 45 years of records, the warmest Marchs in Summerside were 1999 and 2024 — when the month averaged 0.5°C — while the coldest was 2015 at -6.7°C. Typical March days reach 0.6°C with nights near -6.1°C. The long-term trend is warming, about 0.3°C per decade.
March is about average for rainfall in Summerside, averaging 79 mm of rainfall. The wettest March on record was 2024 with 167 mm, while the driest was 2011 at 34 mm.
Relative humidity in Summerside during March averages 86%. The most humid March was 1987 at 92%, and the least humid was 2002 at 79%.
March receives about 3.1 kWh/m²/day of solar energy in Summerside. The sunniest March was 2025 at 3.6 kWh/m²/day, and the cloudiest was 2003 at 2.5.
Average wind speed in Summerside during March is 4.4 m/s. The windiest March was 1984 at 5.3 m/s, while the calmest was 2006 at 3.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -3.4°C | -2.7°C | -3.0°C | -2.9°C | -1.4°C | +2°C |
| Avg High | 0.0°C | 0.8°C | 0.3°C | 0.3°C | 1.9°C | +1.9°C |
| Avg Low | -6.8°C | -6.2°C | -6.4°C | -6.1°C | -4.6°C | +2.2°C |
| Avg Rain | 85 mm | 69 mm | 88 mm | 68 mm | 89 mm | +4 mm |
March temperatures in Summerside have risen by about 1.9°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -20.6°C (1992) to a record high of 17.8°C (2012).
Rainfall in March is about average for rainfall, averaging 79 mm, with a wettest year of 167 mm.
A quieter season to visit Summerside
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Summerside. That said, March — with days averaging 0.6°C and nights around -6.1°C (mean -2.7°C) and moderate rainfall (79 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 3.1°C | -0.4°C | -3.9°C | 11.0°C | -11.9°C | 92 mm | 84% | 4 m/s | 3.6 |
| 2024 🌧️ | 3.1°C | 0.5°C | -2.0°C | 10.0°C | -10.4°C | 167 mm | 87% | 4.5 m/s | 3.4 |
| 2023 | 1.0°C | -1.8°C | -4.7°C | 4.3°C | -14.1°C | 58 mm | 87% | 3.9 m/s | 3.3 |
| 2022 | 1.1°C | -2.1°C | -5.4°C | 10.6°C | -17.3°C | 94 mm | 86% | 4.2 m/s | 3.1 |
| 2021 | 2.6°C | -1.8°C | -6.1°C | 12.5°C | -14.8°C | 68 mm | 83% | 4.9 m/s | 3.5 |
| 2020 | 0.7°C | -2.6°C | -5.8°C | 7.6°C | -11.6°C | 56 mm | 85% | 4.4 m/s | 3.1 |
| 2019 | 0.2°C | -3.5°C | -7.2°C | 10.3°C | -18.2°C | 57 mm | 86% | 4 m/s | 3.5 |
| 2018 | 0.9°C | -1.7°C | -4.3°C | 7.2°C | -12.0°C | 58 mm | 88% | 5.1 m/s | 2.7 |
| 2017 | -1.4°C | -4.6°C | -7.8°C | 5.0°C | -18.0°C | 65 mm | 84% | 4.9 m/s | 3 |
| 2016 | -0.2°C | -3.6°C | -7.0°C | 6.5°C | -15.8°C | 94 mm | 85% | 4.3 m/s | 3.2 |
| 2015 ❄️ | -2.7°C | -6.7°C | -10.8°C | 1.6°C | -17.9°C | 84 mm | 91% | 4.5 m/s | 2.6 |
| 2014 | -2.2°C | -6.2°C | -10.1°C | 4.0°C | -20.3°C | 108 mm | 84% | 4.7 m/s | 2.9 |
| 2013 | 1.7°C | -0.7°C | -3.1°C | 10.5°C | -11.4°C | 51 mm | 85% | 4.4 m/s | 3 |
| 2012 | 3.1°C | -0.2°C | -3.5°C | 17.8°C | -10.9°C | 41 mm | 84% | 4.3 m/s | 3.3 |
| 2011 | 1.2°C | -1.9°C | -5.1°C | 8.1°C | -14.4°C | 34 mm | 84% | 4.9 m/s | 3.3 |
| 2010 | 2.4°C | -0.1°C | -2.6°C | 9.7°C | -7.9°C | 91 mm | 85% | 4.4 m/s | 3.4 |
| 2009 | 0.0°C | -3.8°C | -7.5°C | 6.7°C | -14.7°C | 92 mm | 88% | 4.1 m/s | 3 |
| 2008 | -1.9°C | -6.2°C | -10.5°C | 4.9°C | -17.4°C | 116 mm | 89% | 4.2 m/s | 3.1 |
| 2007 | 0.1°C | -2.9°C | -5.9°C | 7.6°C | -17.2°C | 61 mm | 85% | 5.2 m/s | 2.9 |
| 2006 | 1.7°C | -1.2°C | -4.1°C | 9.8°C | -15.0°C | 38 mm | 85% | 3.6 m/s | 3.5 |
| 2005 | 0.5°C | -2.8°C | -6.1°C | 8.3°C | -12.2°C | 109 mm | 85% | 4.5 m/s | 2.8 |
| 2004 | -0.1°C | -3.6°C | -7.0°C | 7.0°C | -15.1°C | 84 mm | 89% | 3.9 m/s | 2.8 |
| 2003 | -0.4°C | -4.1°C | -7.8°C | 9.4°C | -17.7°C | 153 mm | 89% | 4.3 m/s | 2.5 |
| 2002 | 1.3°C | -2.1°C | -5.4°C | 9.6°C | -9.8°C | 65 mm | 79% | 4.5 m/s | 3.2 |
| 2001 | -1.1°C | -3.7°C | -6.3°C | 1.4°C | -17.2°C | 72 mm | 92% | 4.3 m/s | 2.7 |
| 2000 | 3.2°C | 0.1°C | -3.0°C | 12.0°C | -7.4°C | 92 mm | 86% | 4.4 m/s | 2.9 |
| 1999 🔥 | 3.9°C | 0.5°C | -2.8°C | 12.9°C | -8.6°C | 115 mm | 85% | 5 m/s | 2.9 |
| 1998 | 2.5°C | -0.6°C | -3.7°C | 14.0°C | -11.1°C | 62 mm | 85% | 4.4 m/s | 2.6 |
| 1997 | -1.7°C | -4.9°C | -8.1°C | 5.6°C | -14.8°C | 48 mm | 84% | 4.6 m/s | 3.1 |
| 1996 | 0.7°C | -2.8°C | -6.4°C | 8.5°C | -13.7°C | 72 mm | 83% | 4.4 m/s | 3 |
| 1995 | 0.7°C | -2.8°C | -6.3°C | 10.5°C | -15.5°C | 43 mm | 86% | 4.3 m/s | 2.8 |
| 1994 | 1.0°C | -2.3°C | -5.7°C | 6.2°C | -15.7°C | 111 mm | 87% | 4.1 m/s | 2.9 |
| 1993 | 0.2°C | -4.0°C | -8.3°C | 13.7°C | -18.9°C | 55 mm | 85% | 4.6 m/s | 3.2 |
| 1992 | -1.6°C | -5.6°C | -9.5°C | 7.9°C | -20.6°C | 42 mm | 87% | 4.6 m/s | 3.4 |
| 1991 | 1.8°C | -1.5°C | -4.8°C | 8.7°C | -10.9°C | 97 mm | 88% | 4.7 m/s | 3.5 |
| 1990 | 0.6°C | -2.9°C | -6.4°C | 9.9°C | -16.2°C | 43 mm | 82% | 4.3 m/s | 3.1 |
| 1989 | -0.3°C | -4.3°C | -8.3°C | 12.5°C | -19.1°C | 83 mm | 88% | 4.5 m/s | 2.9 |
| 1988 | 0.8°C | -2.8°C | -6.3°C | 11.7°C | -15.3°C | 37 mm | 86% | 4.6 m/s | 2.8 |
| 1987 | -1.3°C | -4.6°C | -8.0°C | 10.7°C | -16.4°C | 73 mm | 92% | 3.8 m/s | 3 |
| 1986 | 0.6°C | -3.8°C | -8.2°C | 12.8°C | -17.8°C | 86 mm | 87% | 4.5 m/s | 2.7 |
| 1985 | -0.7°C | -4.3°C | -7.9°C | 5.9°C | -19.7°C | 71 mm | 86% | 5 m/s | 3 |
| 1984 | -1.5°C | -4.3°C | -7.0°C | 8.4°C | -17.2°C | 147 mm | 89% | 5.3 m/s | 2.9 |
| 1983 | 1.2°C | -2.0°C | -5.1°C | 10.0°C | -14.9°C | 114 mm | 89% | 4.4 m/s | — |
| 1982 | -0.9°C | -4.4°C | -7.8°C | 6.7°C | -16.7°C | 71 mm | 90% | 4.3 m/s | — |
| 1981 | 2.4°C | 0.1°C | -2.3°C | 6.7°C | -7.8°C | 82 mm | 85% | 4.4 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 0.6°C with lows near -6.1°C (mean -2.7°C), based on 45 years of NASA POWER data.
March averages 79 mm of rainfall in Summerside, about average for rainfall. The wettest on record was 167 mm in 2024.
The hottest March reached 17.8°C in 2012. The coldest dipped to -20.6°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 1.9°C. Daytime highs moved from 0.1°C to 2.2°C and overnight lows from -6°C to -4.4°C over the same span.
March is one of the cooler months of the year in Summerside and about average for rainfall, so plan for around 0.6°C daytime highs and -6.1°C at night.
Not quite — March is the 3rd coolest month in Summerside, averaging -2.7°C.
For March in Summerside, pack warm layers and a jacket for chilly mornings, with typical highs of 0.6°C and lows of -6.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 86% — quite humid.
Average wind speed in March is 4.4 m/s. The windiest March on record averaged 5.3 m/s (1984).
The wettest March on record was 2024 with 167 mm. On average, March sees 79 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 March, 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 March specifically, along with year-by-year records and how the month has changed over the decades.
