May is one of the warmer months of the year in Rimouski, with average highs near 11.6°C and lows around 3.5°C (mean 7.6°C). It is about average for rainfall, averaging 84 mm of rainfall and 81% relative humidity across the period.
May is one of the warmer months of the year in Rimouski. Across 45 years of records, the warmest May in Rimouski was 2024 — when the month averaged 10.3°C — while the coldest was 1983 at 5°C. Typical May days reach 11.6°C with nights near 3.5°C. The long-term trend is warming, about 0.6°C per decade.
May is about average for rainfall in Rimouski, averaging 84 mm of rainfall. The wettest May on record was 1983 with 178 mm, while the driest was 2024 at 31 mm.
Relative humidity in Rimouski during May averages 81%. The most humid May was 1983 at 88%, and the least humid was 2023 at 73%.
May receives about 5.2 kWh/m²/day of solar energy in Rimouski. The sunniest Mays were 1992 and 2018 at 6 kWh/m²/day, and the cloudiest was 1984 at 4.1.
Average wind speed in Rimouski during May is 1.8 m/s. The windiest May was 2023 at 2.4 m/s, while the calmest was 2003 at 1.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 6.6°C | 7.0°C | 7.3°C | 8.4°C | 8.7°C | +2.1°C |
| Avg High | 10.7°C | 11.3°C | 11.3°C | 12.2°C | 12.7°C | +2°C |
| Avg Low | 2.4°C | 2.7°C | 3.4°C | 4.6°C | 4.6°C | +2.2°C |
| Avg Rain | 101 mm | 76 mm | 79 mm | 98 mm | 59 mm | -42 mm |
May temperatures in Rimouski have risen by about 3.2°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -5.1°C (2019) to a record high of 26.7°C (2023).
Rainfall in May is about average for rainfall, averaging 84 mm, with a wettest year of 178 mm.
A good time to visit Rimouski
May is a good time to visit Rimouski, with days averaging 11.6°C and nights around 3.5°C (mean 7.6°C, warmer than Rimouski'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 | 12.6°C | 8.7°C | 4.7°C | 23.9°C | -1.6°C | 88 mm | 80% | 2.2 m/s | 5 |
| 2024 🔥 | 14.1°C | 10.3°C | 6.5°C | 22.6°C | 0.6°C | 31 mm | 78% | 1.7 m/s | 5.3 |
| 2023 | 12.8°C | 8.8°C | 4.8°C | 26.7°C | 0.7°C | 38 mm | 73% | 2.4 m/s | 5.5 |
| 2022 | 13.1°C | 8.9°C | 4.6°C | 21.8°C | -1.8°C | 87 mm | 77% | 1.8 m/s | 5.7 |
| 2021 | 12.2°C | 8.2°C | 4.1°C | 21.8°C | -1.1°C | 52 mm | 77% | 1.9 m/s | 5.6 |
| 2020 | 11.4°C | 7.3°C | 3.2°C | 24.5°C | -2.6°C | 58 mm | 78% | 2.2 m/s | 5.6 |
| 2019 | 10.2°C | 6.5°C | 2.7°C | 17.6°C | -5.1°C | 76 mm | 81% | 1.8 m/s | 5.5 |
| 2018 | 11.4°C | 6.9°C | 2.3°C | 23.8°C | -3.2°C | 74 mm | 78% | 2 m/s | 6 |
| 2017 | 11.6°C | 8.1°C | 4.6°C | 19.3°C | -0.5°C | 121 mm | 85% | 1.9 m/s | 4.7 |
| 2016 | 13.1°C | 9.1°C | 5.1°C | 21.3°C | 0.1°C | 71 mm | 83% | 1.8 m/s | 5.1 |
| 2015 | 13.2°C | 9.2°C | 5.2°C | 19.6°C | 1.7°C | 74 mm | 81% | 2 m/s | 5.3 |
| 2014 | 11.6°C | 8.2°C | 4.9°C | 20.1°C | 1.2°C | 88 mm | 85% | 1.8 m/s | 4.7 |
| 2013 | 13.0°C | 9.3°C | 5.6°C | 21.7°C | 1.5°C | 142 mm | 82% | 1.8 m/s | 4.8 |
| 2012 | 13.8°C | 9.7°C | 5.7°C | 21.7°C | 1.0°C | 94 mm | 81% | 2 m/s | 5.5 |
| 2011 | 10.7°C | 7.5°C | 4.4°C | 19.6°C | -0.2°C | 140 mm | 86% | 2.1 m/s | 4.6 |
| 2010 | 13.8°C | 9.8°C | 5.8°C | 23.1°C | 0.0°C | 105 mm | 79% | 2 m/s | 5.7 |
| 2009 | 11.3°C | 7.5°C | 3.7°C | 18.8°C | -0.9°C | 76 mm | 79% | 2 m/s | 5.4 |
| 2008 | 11.8°C | 8.3°C | 4.9°C | 16.9°C | -1.1°C | 53 mm | 80% | 1.8 m/s | 5.6 |
| 2007 | 12.0°C | 8.1°C | 4.3°C | 23.9°C | -0.9°C | 46 mm | 78% | 2.2 m/s | 5.8 |
| 2006 | 12.7°C | 8.6°C | 4.4°C | 20.4°C | -1.7°C | 89 mm | 83% | 1.6 m/s | 4.6 |
| 2005 | 10.3°C | 7.1°C | 3.9°C | 19.4°C | -1.2°C | 103 mm | 85% | 2 m/s | 4.7 |
| 2004 | 9.9°C | 5.7°C | 1.4°C | 15.6°C | -3.4°C | 120 mm | 82% | 1.8 m/s | 5.1 |
| 2003 | 10.7°C | 6.5°C | 2.3°C | 20.9°C | -2.9°C | 62 mm | 79% | 1.3 m/s | 5.1 |
| 2002 | 10.2°C | 6.1°C | 2.0°C | 18.9°C | -2.9°C | 81 mm | 80% | 2 m/s | 4.9 |
| 2001 | 13.8°C | 9.1°C | 4.4°C | 21.2°C | -0.6°C | 54 mm | 82% | 1.4 m/s | 5.8 |
| 2000 | 10.1°C | 6.1°C | 2.2°C | 17.8°C | -2.0°C | 101 mm | 82% | 1.7 m/s | 4.9 |
| 1999 | 15.0°C | 10.1°C | 5.2°C | 22.6°C | -2.1°C | 65 mm | 78% | 1.8 m/s | 5.8 |
| 1998 | 14.1°C | 9.5°C | 5.0°C | 21.1°C | 0.6°C | 53 mm | 78% | 1.6 m/s | 5.4 |
| 1997 | 8.9°C | 5.2°C | 1.5°C | 17.8°C | -3.8°C | 103 mm | 81% | 1.9 m/s | 4.8 |
| 1996 | 9.9°C | 5.9°C | 1.8°C | 17.4°C | -3.1°C | 42 mm | 76% | 1.8 m/s | 5.3 |
| 1995 | 10.8°C | 6.6°C | 2.4°C | 16.4°C | -2.9°C | 55 mm | 82% | 1.5 m/s | 4.6 |
| 1994 | 9.9°C | 5.7°C | 1.5°C | 14.3°C | -2.3°C | 92 mm | 81% | 1.7 m/s | 5.2 |
| 1993 | 11.2°C | 7.2°C | 3.2°C | 17.2°C | -0.4°C | 109 mm | 81% | 1.7 m/s | 4.2 |
| 1992 | 11.7°C | 7.0°C | 2.2°C | 24.2°C | -3.1°C | 38 mm | 78% | 1.9 m/s | 6 |
| 1991 | 11.4°C | 6.9°C | 2.3°C | 19.1°C | -2.2°C | 94 mm | 80% | 1.8 m/s | 5.3 |
| 1990 | 10.0°C | 5.9°C | 1.9°C | 18.5°C | -2.2°C | 106 mm | 78% | 1.9 m/s | 5.2 |
| 1989 | 12.4°C | 8.4°C | 4.4°C | 19.8°C | 0.2°C | 114 mm | 87% | 1.5 m/s | 4.4 |
| 1988 | 12.2°C | 7.8°C | 3.4°C | 18.4°C | -1.3°C | 56 mm | 80% | 1.8 m/s | 5.3 |
| 1987 | 11.3°C | 6.7°C | 2.0°C | 17.4°C | -3.2°C | 64 mm | 76% | 1.9 m/s | 5.1 |
| 1986 | 11.6°C | 7.2°C | 2.9°C | 19.3°C | -3.8°C | 108 mm | 80% | 1.8 m/s | 5.4 |
| 1985 | 9.6°C | 5.3°C | 0.9°C | 15.1°C | -4.6°C | 95 mm | 80% | 1.7 m/s | 5.3 |
| 1984 | 9.5°C | 5.7°C | 1.9°C | 16.8°C | -1.7°C | 121 mm | 83% | 1.8 m/s | 4.1 |
| 1983 ❄️ 🌧️ | 8.3°C | 5.0°C | 1.7°C | 14.5°C | -1.9°C | 178 mm | 88% | 1.8 m/s | — |
| 1982 | 11.0°C | 6.3°C | 1.7°C | 20.5°C | -3.2°C | 49 mm | 82% | 1.5 m/s | — |
| 1981 | 10.8°C | 6.7°C | 2.6°C | 17.1°C | -2.1°C | 121 mm | 84% | 1.8 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 11.6°C with lows near 3.5°C (mean 7.6°C), based on 45 years of NASA POWER data.
May averages 84 mm of rainfall in Rimouski, about average for rainfall. The wettest on record was 178 mm in 1983.
The hottest May reached 26.7°C in 2023. The coldest dipped to -5.1°C in 2019.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 3.2°C. Daytime highs moved from 9.8°C to 13°C and overnight lows from 1.8°C to 4.9°C over the same span.
May is one of the warmer months of the year in Rimouski and about average for rainfall, so plan for around 11.6°C daytime highs and 3.5°C at night.
Not quite — May is the 8th coolest month in Rimouski, averaging 7.6°C.
For May in Rimouski, pack warm layers and a jacket for chilly mornings, with typical highs of 11.6°C and lows of 3.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 81% — quite humid.
Average wind speed in May is 1.8 m/s. The windiest May on record averaged 2.4 m/s (2023).
The wettest May on record was 1983 with 178 mm. On average, May sees 84 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 Rimouski 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.
