May is one of the warmer months of the year in Rouyn-Noranda, with average highs near 15.5°C and lows around 3.4°C (mean 9.5°C). It is about average for rainfall, averaging 79 mm of rainfall and 78% relative humidity across the period.
May is one of the warmer months of the year in Rouyn-Noranda. Across 45 years of records, the warmest May in Rouyn-Noranda was 1998 — when the month averaged 12.2°C — while the coldest was 1997 at 5.8°C. Typical May days reach 15.5°C with nights near 3.4°C. The long-term trend is warming, about 0.2°C per decade.
May is about average for rainfall in Rouyn-Noranda, averaging 79 mm of rainfall. The wettest May on record was 1984 with 136 mm, while the driest was 2012 at 34 mm.
Relative humidity in Rouyn-Noranda during May averages 78%. The most humid May was 2017 at 84%, and the least humid was 2012 at 71%.
May receives about 5.2 kWh/m²/day of solar energy in Rouyn-Noranda. The sunniest May was 1998 at 6 kWh/m²/day, and the cloudiest was 1984 at 3.9.
Average wind speed in Rouyn-Noranda during May is 0.4 m/s. The windiest Mays were 2021, 2023 and 2025, among others at 0.4 m/s, while the calmest were 2019, 2022 and 2024, 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 | 9.2°C | 9.2°C | 9.1°C | 9.9°C | 10.0°C | +0.8°C |
| Avg High | 15.2°C | 15.3°C | 15.0°C | 16.0°C | 16.3°C | +1.1°C |
| Avg Low | 3.2°C | 3.1°C | 3.3°C | 3.7°C | 3.6°C | +0.4°C |
| Avg Rain | 94 mm | 82 mm | 79 mm | 76 mm | 57 mm | -37 mm |
May temperatures in Rouyn-Noranda have risen by about 2.1°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -7.4°C (1986) to a record high of 33°C (2010).
Rainfall in May is about average for rainfall, averaging 79 mm, with a wettest year of 136 mm.
A good time to visit Rouyn-Noranda
May is a good time to visit Rouyn-Noranda, with days averaging 15.5°C and nights around 3.4°C (mean 9.5°C, warmer than Rouyn-Noranda's yearly average) and moderate 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 | 16.0°C | 9.6°C | 3.1°C | 25.2°C | -5.5°C | 46 mm | 77% | 0.4 m/s | 5.3 |
| 2024 | 17.7°C | 11.8°C | 5.8°C | 25.5°C | -0.5°C | 66 mm | 79% | 0.3 m/s | 5.3 |
| 2023 | 16.1°C | 9.4°C | 2.7°C | 28.7°C | -5.5°C | 62 mm | 75% | 0.4 m/s | 5.8 |
| 2022 | 18.1°C | 11.6°C | 5.1°C | 27.7°C | -3.6°C | 73 mm | 77% | 0.3 m/s | 5.3 |
| 2021 | 15.8°C | 9.4°C | 3.0°C | 27.2°C | -7.2°C | 58 mm | 73% | 0.4 m/s | 5.6 |
| 2020 | 13.8°C | 7.9°C | 1.9°C | 28.8°C | -6.3°C | 37 mm | 75% | 0.4 m/s | 5.5 |
| 2019 | 12.3°C | 6.8°C | 1.4°C | 18.5°C | -4.8°C | 84 mm | 80% | 0.3 m/s | 5.2 |
| 2018 | 17.3°C | 10.3°C | 3.3°C | 27.1°C | -4.5°C | 73 mm | 76% | 0.4 m/s | 5.8 |
| 2017 | 13.4°C | 8.3°C | 3.3°C | 22.2°C | -4.5°C | 128 mm | 84% | 0.4 m/s | 4 |
| 2016 | 16.2°C | 9.8°C | 3.4°C | 26.4°C | -3.3°C | 69 mm | 78% | 0.4 m/s | 5.5 |
| 2015 | 16.5°C | 10.2°C | 3.9°C | 23.3°C | -4.5°C | 107 mm | 79% | 0.4 m/s | 5.2 |
| 2014 | 15.5°C | 10.0°C | 4.4°C | 22.9°C | -3.1°C | 94 mm | 81% | 0.3 m/s | 4.9 |
| 2013 | 16.6°C | 10.3°C | 4.1°C | 25.6°C | -3.3°C | 73 mm | 77% | 0.4 m/s | 5.4 |
| 2012 | 18.2°C | 11.3°C | 4.4°C | 28.3°C | -6.0°C | 34 mm | 71% | 0.4 m/s | 5.5 |
| 2011 | 16.1°C | 9.8°C | 3.5°C | 27.0°C | -2.9°C | 45 mm | 79% | 0.4 m/s | 5.8 |
| 2010 | 18.1°C | 12.0°C | 5.8°C | 33.0°C | -4.3°C | 53 mm | 76% | 0.3 m/s | 5.5 |
| 2009 | 13.9°C | 7.5°C | 1.1°C | 23.4°C | -4.3°C | 96 mm | 77% | 0.4 m/s | 4.9 |
| 2008 | 12.7°C | 7.3°C | 2.0°C | 20.9°C | -3.2°C | 114 mm | 80% | 0.4 m/s | 4.4 |
| 2007 | 17.1°C | 10.4°C | 3.7°C | 27.8°C | -5.2°C | 45 mm | 73% | 0.4 m/s | 5.9 |
| 2006 | 17.7°C | 12.0°C | 6.3°C | 29.7°C | -3.6°C | 50 mm | 79% | 0.4 m/s | 5 |
| 2005 | 15.3°C | 9.4°C | 3.5°C | 24.8°C | -6.0°C | 48 mm | 78% | 0.4 m/s | 5.3 |
| 2004 | 13.4°C | 7.6°C | 1.8°C | 22.7°C | -6.1°C | 95 mm | 80% | 0.4 m/s | 4.8 |
| 2003 | 16.3°C | 10.3°C | 4.2°C | 23.0°C | -4.2°C | 66 mm | 79% | 0.3 m/s | 5.7 |
| 2002 | 12.3°C | 6.6°C | 0.9°C | 24.4°C | -4.1°C | 69 mm | 79% | 0.4 m/s | 5.4 |
| 2001 | 16.7°C | 11.0°C | 5.3°C | 22.8°C | -2.1°C | 83 mm | 81% | 0.4 m/s | 5.4 |
| 2000 | 14.8°C | 9.3°C | 3.8°C | 23.8°C | -5.2°C | 129 mm | 80% | 0.4 m/s | 4.7 |
| 1999 | 18.7°C | 12.1°C | 5.4°C | 26.2°C | -3.9°C | 69 mm | 75% | 0.4 m/s | 5.7 |
| 1998 🔥 | 18.7°C | 12.2°C | 5.8°C | 27.1°C | -1.7°C | 65 mm | 77% | 0.4 m/s | 6 |
| 1997 ❄️ | 10.9°C | 5.8°C | 0.7°C | 22.2°C | -5.7°C | 103 mm | 81% | 0.4 m/s | 4.9 |
| 1996 | 13.1°C | 7.0°C | 1.0°C | 22.2°C | -5.0°C | 51 mm | 77% | 0.4 m/s | 5.9 |
| 1995 | 15.5°C | 9.4°C | 3.2°C | 27.8°C | -5.5°C | 127 mm | 78% | 0.3 m/s | 5.2 |
| 1994 | 14.5°C | 7.9°C | 1.3°C | 23.4°C | -4.6°C | 74 mm | 75% | 0.4 m/s | 5.8 |
| 1993 | 15.2°C | 9.8°C | 4.4°C | 27.1°C | -0.3°C | 116 mm | 79% | 0.4 m/s | 4.3 |
| 1992 | 15.6°C | 8.8°C | 2.0°C | 25.9°C | -4.4°C | 65 mm | 75% | 0.4 m/s | 5.9 |
| 1991 | 17.1°C | 11.0°C | 4.9°C | 25.6°C | -5.6°C | 69 mm | 79% | 0.4 m/s | 5.3 |
| 1990 | 14.2°C | 8.4°C | 2.6°C | 21.7°C | -4.2°C | 78 mm | 78% | 0.4 m/s | 4.9 |
| 1989 | 15.8°C | 10.5°C | 5.3°C | 26.3°C | -2.1°C | 123 mm | 83% | 0.4 m/s | 4.5 |
| 1988 | 17.5°C | 10.6°C | 3.8°C | 26.8°C | -3.9°C | 83 mm | 77% | 0.4 m/s | 5.5 |
| 1987 | 16.5°C | 10.1°C | 3.7°C | 27.3°C | -5.9°C | 87 mm | 74% | 0.4 m/s | 5.4 |
| 1986 | 16.0°C | 10.4°C | 4.7°C | 27.0°C | -7.4°C | 108 mm | 82% | 0.4 m/s | 4.6 |
| 1985 | 14.8°C | 8.3°C | 1.9°C | 22.5°C | -6.4°C | 68 mm | 77% | 0.4 m/s | 5.2 |
| 1984 🌧️ | 12.3°C | 6.8°C | 1.2°C | 19.9°C | -3.9°C | 136 mm | 79% | 0.4 m/s | 3.9 |
| 1983 | 12.0°C | 6.5°C | 1.0°C | 23.1°C | -6.1°C | 127 mm | 80% | 0.4 m/s | — |
| 1982 | 18.3°C | 12.0°C | 5.7°C | 27.1°C | -1.9°C | 38 mm | 79% | 0.3 m/s | — |
| 1981 | 14.0°C | 7.9°C | 1.7°C | 24.9°C | -6.8°C | 76 mm | 79% | 0.4 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 15.5°C with lows near 3.4°C (mean 9.5°C), based on 45 years of NASA POWER data.
May averages 79 mm of rainfall in Rouyn-Noranda, about average for rainfall. The wettest on record was 136 mm in 1984.
The hottest May reached 33°C in 2010. The coldest dipped to -7.4°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 2.1°C. Daytime highs moved from 14.3°C to 16.7°C and overnight lows from 2.3°C to 3.9°C over the same span.
May is one of the warmer months of the year in Rouyn-Noranda and about average for rainfall, so plan for around 15.5°C daytime highs and 3.4°C at night.
Not quite — May is the 8th coolest month in Rouyn-Noranda, averaging 9.5°C.
For May in Rouyn-Noranda, pack warm layers and a jacket for chilly mornings, with typical highs of 15.5°C and lows of 3.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 78% — quite humid.
Average wind speed in May is 0.4 m/s. The windiest May on record averaged 0.4 m/s (1981).
The wettest May on record was 1984 with 136 mm. On average, May 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 Rouyn-Noranda 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.
