May is one of the warmer months of the year in Miramichi, with average highs near 15.2°C and lows around 4°C (mean 9.6°C). It is about average for rainfall, averaging 77 mm of rainfall and 80% relative humidity across the period.
May is one of the warmer months of the year in Miramichi. Across 45 years of records, the warmest May in Miramichi was 1999 — when the month averaged 12.7°C — while the coldest were 1990 and 2005 at 7.4°C. Typical May days reach 15.2°C with nights near 4°C. The long-term May temperature trend is broadly flat.
May is about average for rainfall in Miramichi, averaging 77 mm of rainfall. The wettest May on record was 1983 with 149 mm, while the driest was 1992 at 19 mm.
Relative humidity in Miramichi during May averages 80%. The most humid May was 2011 at 86%, and the least humid was 2020 at 72%.
May receives about 5.2 kWh/m²/day of solar energy in Miramichi. The sunniest May was 2018 at 6.3 kWh/m²/day, and the cloudiest was 1984 at 4.
Average wind speed in Miramichi during May is 0.3 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 | 9.7°C | 9.4°C | 9.2°C | 9.8°C | 10.1°C | +0.4°C |
| Avg High | 15.2°C | 15.1°C | 14.7°C | 15.4°C | 16.1°C | +0.9°C |
| Avg Low | 4.2°C | 3.6°C | 3.8°C | 4.2°C | 4.1°C | -0.1°C |
| Avg Rain | 96 mm | 77 mm | 80 mm | 70 mm | 57 mm | -39 mm |
May temperatures in Miramichi have risen by about 1°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -4.2°C (1987) to a record high of 32°C (2023).
Rainfall in May is about average for rainfall, averaging 77 mm, with a wettest year of 149 mm.
A good time to visit Miramichi
May is a good time to visit Miramichi, with days averaging 15.2°C and nights around 4°C (mean 9.6°C, warmer than Miramichi'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 | 14.9°C | 9.6°C | 4.3°C | 29.1°C | -1.5°C | 77 mm | 81% | 0.4 m/s | 4.7 |
| 2024 | 16.9°C | 11.1°C | 5.2°C | 25.6°C | -1.1°C | 49 mm | 81% | 0.3 m/s | 5.3 |
| 2023 | 15.3°C | 9.5°C | 3.7°C | 32.0°C | 0.0°C | 59 mm | 76% | 0.4 m/s | 5.4 |
| 2022 | 17.6°C | 10.9°C | 4.2°C | 25.2°C | -3.7°C | 37 mm | 74% | 0.3 m/s | 5.9 |
| 2021 | 16.0°C | 9.9°C | 3.7°C | 28.5°C | -0.7°C | 70 mm | 74% | 0.4 m/s | 5.6 |
| 2020 | 15.9°C | 9.8°C | 3.6°C | 29.8°C | -2.2°C | 52 mm | 72% | 0.4 m/s | 5.8 |
| 2019 | 12.9°C | 7.6°C | 2.3°C | 21.8°C | -3.0°C | 54 mm | 79% | 0.3 m/s | 5.2 |
| 2018 | 16.5°C | 9.5°C | 2.6°C | 27.7°C | -3.9°C | 53 mm | 74% | 0.3 m/s | 6.3 |
| 2017 | 14.3°C | 9.3°C | 4.3°C | 26.9°C | -0.8°C | 95 mm | 83% | 0.3 m/s | 4.7 |
| 2016 | 15.8°C | 10.2°C | 4.7°C | 25.2°C | -1.3°C | 64 mm | 80% | 0.3 m/s | 5 |
| 2015 | 17.3°C | 11.3°C | 5.4°C | 27.2°C | -2.6°C | 50 mm | 77% | 0.3 m/s | 5.5 |
| 2014 | 13.5°C | 8.4°C | 3.4°C | 22.6°C | -1.0°C | 69 mm | 84% | 0.3 m/s | 4.9 |
| 2013 | 16.4°C | 10.7°C | 5.0°C | 26.9°C | -3.0°C | 93 mm | 82% | 0.3 m/s | 4.9 |
| 2012 | 16.3°C | 10.8°C | 5.2°C | 27.1°C | -1.6°C | 73 mm | 81% | 0.3 m/s | 5.3 |
| 2011 | 13.7°C | 9.0°C | 4.3°C | 22.1°C | -2.5°C | 96 mm | 86% | 0.4 m/s | 4.1 |
| 2010 | 17.0°C | 11.1°C | 5.2°C | 26.9°C | 0.0°C | 56 mm | 77% | 0.3 m/s | 5.5 |
| 2009 | 15.3°C | 9.8°C | 4.4°C | 24.8°C | 0.4°C | 81 mm | 80% | 0.3 m/s | 5.4 |
| 2008 | 14.1°C | 9.1°C | 4.0°C | 21.5°C | -0.3°C | 68 mm | 82% | 0.3 m/s | 5.1 |
| 2007 | 14.4°C | 9.0°C | 3.7°C | 30.0°C | -1.6°C | 74 mm | 79% | 0.3 m/s | 5.1 |
| 2006 | 16.4°C | 10.8°C | 5.2°C | 23.1°C | -1.1°C | 93 mm | 82% | 0.3 m/s | 5.2 |
| 2005 | 11.6°C | 7.4°C | 3.1°C | 21.1°C | -2.2°C | 113 mm | 83% | 0.4 m/s | 4.5 |
| 2004 | 15.8°C | 9.5°C | 3.3°C | 25.0°C | -2.9°C | 45 mm | 76% | 0.3 m/s | 5.1 |
| 2003 | 14.0°C | 8.4°C | 2.9°C | 28.7°C | -3.8°C | 100 mm | 81% | 0.3 m/s | 4.6 |
| 2002 | 14.6°C | 9.0°C | 3.4°C | 23.6°C | -4.1°C | 70 mm | 77% | 0.3 m/s | 5.4 |
| 2001 | 16.9°C | 10.9°C | 4.9°C | 25.1°C | -2.0°C | 80 mm | 81% | 0.3 m/s | 5.6 |
| 2000 | 13.4°C | 8.1°C | 2.8°C | 20.9°C | -3.0°C | 76 mm | 81% | 0.3 m/s | 5 |
| 1999 🔥 | 19.2°C | 12.7°C | 6.2°C | 26.9°C | -1.1°C | 28 mm | 76% | 0.3 m/s | 6 |
| 1998 | 18.4°C | 12.4°C | 6.5°C | 25.4°C | -0.1°C | 76 mm | 80% | 0.3 m/s | 5.4 |
| 1997 | 13.4°C | 8.3°C | 3.2°C | 20.3°C | -1.6°C | 69 mm | 81% | 0.3 m/s | 4.7 |
| 1996 | 13.2°C | 7.9°C | 2.6°C | 20.5°C | -3.8°C | 68 mm | 79% | 0.3 m/s | 5 |
| 1995 | 14.1°C | 8.4°C | 2.7°C | 20.0°C | -1.9°C | 58 mm | 80% | 0.3 m/s | 5.2 |
| 1994 | 13.2°C | 7.9°C | 2.7°C | 24.9°C | -1.8°C | 118 mm | 83% | 0.3 m/s | 4.9 |
| 1993 | 14.9°C | 9.3°C | 3.6°C | 21.5°C | -2.9°C | 89 mm | 81% | 0.3 m/s | 4.6 |
| 1992 | 16.0°C | 9.3°C | 2.5°C | 29.5°C | -4.0°C | 19 mm | 74% | 0.3 m/s | 5.9 |
| 1991 | 16.0°C | 9.9°C | 3.8°C | 24.1°C | -3.1°C | 107 mm | 79% | 0.3 m/s | 5.2 |
| 1990 ❄️ | 12.1°C | 7.4°C | 2.6°C | 23.4°C | -1.2°C | 137 mm | 83% | 0.4 m/s | 4.3 |
| 1989 | 17.2°C | 11.9°C | 6.7°C | 23.4°C | -0.5°C | 92 mm | 85% | 0.3 m/s | 4.3 |
| 1988 | 16.4°C | 10.7°C | 4.9°C | 23.7°C | -1.9°C | 87 mm | 80% | 0.3 m/s | 5 |
| 1987 | 16.0°C | 9.6°C | 3.2°C | 23.7°C | -4.2°C | 47 mm | 76% | 0.3 m/s | 5.6 |
| 1986 | 14.7°C | 9.0°C | 3.4°C | 24.3°C | -3.1°C | 75 mm | 80% | 0.3 m/s | 6.1 |
| 1985 | 14.5°C | 8.7°C | 2.8°C | 22.4°C | -2.9°C | 125 mm | 79% | 0.3 m/s | 5.4 |
| 1984 | 14.1°C | 9.2°C | 4.2°C | 22.5°C | -0.3°C | 126 mm | 84% | 0.3 m/s | 4 |
| 1983 🌧️ | 13.3°C | 8.6°C | 3.9°C | 19.1°C | -1.5°C | 149 mm | 85% | 0.3 m/s | — |
| 1982 | 14.9°C | 9.1°C | 3.4°C | 26.2°C | -1.6°C | 34 mm | 79% | 0.3 m/s | — |
| 1981 | 15.7°C | 10.4°C | 5.1°C | 22.4°C | -2.9°C | 132 mm | 83% | 0.3 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 15.2°C with lows near 4°C (mean 9.6°C), based on 45 years of NASA POWER data.
May averages 77 mm of rainfall in Miramichi, about average for rainfall. The wettest on record was 149 mm in 1983.
The hottest May reached 32°C in 2023. The coldest dipped to -4.2°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1°C. Daytime highs moved from 14.5°C to 16.1°C and overnight lows from 3.9°C to 4.2°C over the same span.
May is one of the warmer months of the year in Miramichi and about average for rainfall, so plan for around 15.2°C daytime highs and 4°C at night.
Not quite — May is the 8th coolest month in Miramichi, averaging 9.6°C.
For May in Miramichi, pack warm layers and a jacket for chilly mornings, with typical highs of 15.2°C and lows of 4°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 80% — quite humid.
Average wind speed in May is 0.3 m/s. The windiest May on record averaged 0.4 m/s (1990).
The wettest May on record was 1983 with 149 mm. On average, May 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 Miramichi 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.
