May is one of the warmer months of the year in Shawinigan, with average highs near 17.2°C and lows around 5.6°C (mean 11.4°C). It is about average for rainfall, averaging 88 mm of rainfall and 79% relative humidity across the period.
May is one of the warmer months of the year in Shawinigan. Across 45 years of records, the warmest Mays in Shawinigan were 1998 and 1999 — when the month averaged 14.4°C — while the coldest was 1997 at 8.4°C. Typical May days reach 17.2°C with nights near 5.6°C. The long-term trend is warming, about 0.4°C per decade.
May is about average for rainfall in Shawinigan, averaging 88 mm of rainfall. The wettest May on record was 1983 with 214 mm, while the driest was 2010 at 34 mm.
Relative humidity in Shawinigan during May averages 79%. The most humid May was 2011 at 85%, and the least humid was 2023 at 71%.
May receives about 5.3 kWh/m²/day of solar energy in Shawinigan. The sunniest Mays were 1992, 2018 and 2023 at 6.2 kWh/m²/day, and the cloudiest was 1984 at 4.2.
Average wind speed in Shawinigan during May is 0.3 m/s. The windiest May was 1997 at 0.4 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.0°C | 11.2°C | 10.7°C | 12.1°C | 12.4°C | +1.4°C |
| Avg High | 16.7°C | 17.1°C | 16.5°C | 17.9°C | 18.4°C | +1.7°C |
| Avg Low | 5.4°C | 5.4°C | 5.0°C | 6.3°C | 6.3°C | +0.9°C |
| Avg Rain | 110 mm | 76 mm | 87 mm | 98 mm | 59 mm | -51 mm |
May temperatures in Shawinigan have risen by about 2.4°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -4.8°C (1987) to a record high of 29.6°C (2010).
Rainfall in May is about average for rainfall, averaging 88 mm, with a wettest year of 214 mm.
A good time to visit Shawinigan
May is a good time to visit Shawinigan, with days averaging 17.2°C and nights around 5.6°C (mean 11.4°C, warmer than Shawinigan's yearly average) and higher rainfall. July and August are marginally more temperate, but May still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 18.5°C | 12.8°C | 7.0°C | 27.1°C | -2.0°C | 90 mm | 75% | 0.3 m/s | 4.6 |
| 2024 | 19.8°C | 14.3°C | 8.7°C | 27.6°C | 1.6°C | 53 mm | 76% | 0.3 m/s | 5.3 |
| 2023 | 18.1°C | 11.5°C | 4.9°C | 28.5°C | -3.2°C | 50 mm | 71% | 0.3 m/s | 6.2 |
| 2022 | 20.0°C | 13.5°C | 7.1°C | 28.8°C | -2.4°C | 85 mm | 75% | 0.3 m/s | 5.8 |
| 2021 | 17.8°C | 11.8°C | 5.8°C | 28.0°C | -3.1°C | 38 mm | 75% | 0.3 m/s | 5.6 |
| 2020 | 16.2°C | 10.4°C | 4.5°C | 28.6°C | -3.7°C | 38 mm | 78% | 0.3 m/s | 6.1 |
| 2019 | 15.4°C | 9.7°C | 4.0°C | 22.5°C | -4.5°C | 115 mm | 79% | 0.3 m/s | 5 |
| 2018 | 18.4°C | 11.9°C | 5.4°C | 26.8°C | -1.7°C | 55 mm | 78% | 0.3 m/s | 6.2 |
| 2017 | 16.0°C | 11.2°C | 6.4°C | 26.9°C | -0.5°C | 149 mm | 84% | 0.3 m/s | 4.4 |
| 2016 | 18.4°C | 12.0°C | 5.6°C | 28.6°C | -2.0°C | 79 mm | 79% | 0.3 m/s | 5.4 |
| 2015 | 19.6°C | 13.3°C | 7.0°C | 25.6°C | -1.2°C | 109 mm | 79% | 0.3 m/s | 5.4 |
| 2014 | 17.4°C | 12.0°C | 6.6°C | 25.6°C | 0.1°C | 76 mm | 81% | 0.3 m/s | 5.3 |
| 2013 | 18.7°C | 12.9°C | 7.1°C | 26.1°C | -1.1°C | 129 mm | 79% | 0.3 m/s | 5.3 |
| 2012 | 19.0°C | 13.1°C | 7.3°C | 26.5°C | -0.4°C | 95 mm | 80% | 0.3 m/s | 5.2 |
| 2011 | 16.7°C | 11.6°C | 6.5°C | 23.4°C | 1.0°C | 135 mm | 85% | 0.3 m/s | 4.4 |
| 2010 | 19.1°C | 12.9°C | 6.6°C | 29.6°C | -2.7°C | 34 mm | 76% | 0.3 m/s | 6 |
| 2009 | 15.6°C | 10.0°C | 4.4°C | 24.4°C | -0.8°C | 109 mm | 79% | 0.3 m/s | 5.1 |
| 2008 | 15.8°C | 10.0°C | 4.1°C | 21.4°C | -3.1°C | 56 mm | 77% | 0.3 m/s | 5.7 |
| 2007 | 17.5°C | 11.1°C | 4.7°C | 27.1°C | -1.1°C | 51 mm | 77% | 0.3 m/s | 6 |
| 2006 | 17.6°C | 12.6°C | 7.6°C | 27.1°C | -2.3°C | 119 mm | 84% | 0.3 m/s | 4.5 |
| 2005 | 14.4°C | 9.3°C | 4.1°C | 23.3°C | -3.6°C | 41 mm | 80% | 0.3 m/s | 4.8 |
| 2004 | 17.1°C | 10.9°C | 4.8°C | 24.3°C | -4.2°C | 84 mm | 79% | 0.3 m/s | 5.2 |
| 2003 | 17.0°C | 11.0°C | 5.0°C | 26.2°C | -3.4°C | 101 mm | 78% | 0.3 m/s | 5.3 |
| 2002 | 14.7°C | 9.1°C | 3.5°C | 24.1°C | -2.8°C | 124 mm | 78% | 0.3 m/s | 4.8 |
| 2001 | 19.2°C | 13.1°C | 7.0°C | 25.9°C | -0.1°C | 47 mm | 78% | 0.3 m/s | 5.5 |
| 2000 | 15.9°C | 10.3°C | 4.6°C | 24.7°C | -2.5°C | 138 mm | 81% | 0.3 m/s | 4.7 |
| 1999 | 20.7°C | 14.4°C | 8.1°C | 28.1°C | -1.3°C | 55 mm | 74% | 0.3 m/s | 6.1 |
| 1998 🔥 | 20.3°C | 14.4°C | 8.6°C | 26.2°C | 3.3°C | 60 mm | 77% | 0.3 m/s | 5.7 |
| 1997 ❄️ | 13.7°C | 8.4°C | 3.0°C | 22.4°C | -4.0°C | 71 mm | 79% | 0.4 m/s | 4.5 |
| 1996 | 16.0°C | 9.9°C | 3.9°C | 26.0°C | -1.8°C | 52 mm | 76% | 0.3 m/s | 5.7 |
| 1995 | 17.0°C | 11.2°C | 5.3°C | 24.9°C | -4.3°C | 101 mm | 78% | 0.3 m/s | 5 |
| 1994 | 16.2°C | 10.0°C | 3.8°C | 26.4°C | -2.9°C | 93 mm | 79% | 0.3 m/s | 5.4 |
| 1993 | 16.8°C | 11.4°C | 6.0°C | 23.6°C | 1.4°C | 82 mm | 80% | 0.3 m/s | 4.7 |
| 1992 | 17.2°C | 10.6°C | 4.1°C | 25.9°C | -2.4°C | 54 mm | 77% | 0.3 m/s | 6.2 |
| 1991 | 18.2°C | 12.4°C | 6.6°C | 25.0°C | -0.2°C | 103 mm | 80% | 0.3 m/s | 5.4 |
| 1990 | 15.3°C | 9.7°C | 4.2°C | 22.5°C | -1.6°C | 85 mm | 79% | 0.3 m/s | 5.3 |
| 1989 | 17.7°C | 12.6°C | 7.5°C | 28.3°C | 1.4°C | 119 mm | 84% | 0.3 m/s | 4.4 |
| 1988 | 18.0°C | 12.1°C | 6.3°C | 23.1°C | -0.4°C | 59 mm | 80% | 0.3 m/s | 5.3 |
| 1987 | 16.6°C | 10.3°C | 4.1°C | 27.3°C | -4.8°C | 116 mm | 78% | 0.3 m/s | 5.3 |
| 1986 | 17.5°C | 12.0°C | 6.5°C | 26.1°C | -4.1°C | 154 mm | 81% | 0.3 m/s | 4.9 |
| 1985 | 16.0°C | 9.9°C | 3.9°C | 25.0°C | -3.7°C | 61 mm | 78% | 0.3 m/s | 5.6 |
| 1984 | 14.3°C | 9.5°C | 4.7°C | 22.6°C | -0.7°C | 118 mm | 81% | 0.3 m/s | 4.2 |
| 1983 🌧️ | 14.3°C | 9.3°C | 4.3°C | 20.4°C | -2.4°C | 214 mm | 85% | 0.3 m/s | — |
| 1982 | 18.3°C | 12.2°C | 6.0°C | 25.3°C | 0.1°C | 36 mm | 80% | 0.3 m/s | — |
| 1981 | 17.3°C | 11.3°C | 5.4°C | 22.6°C | -3.3°C | 113 mm | 81% | 0.3 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 17.2°C with lows near 5.6°C (mean 11.4°C), based on 45 years of NASA POWER data.
May averages 88 mm of rainfall in Shawinigan, about average for rainfall. The wettest on record was 214 mm in 1983.
The hottest May reached 29.6°C in 2010. The coldest dipped to -4.8°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 2.4°C. Daytime highs moved from 16°C to 18.8°C and overnight lows from 4.9°C to 6.7°C over the same span.
May is one of the warmer months of the year in Shawinigan and about average for rainfall, so plan for around 17.2°C daytime highs and 5.6°C at night.
Not quite — May is the 8th coolest month in Shawinigan, averaging 11.4°C.
For May in Shawinigan, pack warm layers and a jacket for chilly mornings, with typical highs of 17.2°C and lows of 5.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 79% — quite humid.
Average wind speed in May is 0.3 m/s. The windiest May on record averaged 0.4 m/s (1997).
The wettest May on record was 1983 with 214 mm. On average, May sees 88 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 Shawinigan behaves each May, 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 May specifically, along with year-by-year records and how the month has changed over the decades.
