May is one of the warmer months of the year in North Bay, with average highs near 16.1°C and lows around 4.7°C (mean 10.4°C). It is about average for rainfall, averaging 82 mm of rainfall and 77% relative humidity across the period.
May is one of the warmer months of the year in North Bay. Across 45 years of records, the warmest May in North Bay was 1998 — when the month averaged 13.6°C — while the coldest was 1997 at 6.6°C. Typical May days reach 16.1°C with nights near 4.7°C. The long-term trend is warming, about 0.4°C per decade.
May is about average for rainfall in North Bay, averaging 82 mm of rainfall. The wettest May on record was 1995 with 167 mm, while the driest was 2005 at 28 mm.
Relative humidity in North Bay during May averages 77%. The most humid May was 2004 at 82%, and the least humid was 2023 at 68%.
May receives about 5.3 kWh/m²/day of solar energy in North Bay. The sunniest Mays were 1998 and 2023 at 6.2 kWh/m²/day, and the cloudiest was 1984 at 4.2.
Average wind speed in North Bay during May is 0.5 m/s. The windiest Mays were 2021, 2023 and 2025, among others at 0.6 m/s, while the calmest were 1982, 1995 and 2003 at 0.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.1°C | 10.0°C | 9.7°C | 11.2°C | 11.3°C | +1.2°C |
| Avg High | 15.5°C | 15.7°C | 15.2°C | 17.1°C | 17.4°C | +1.9°C |
| Avg Low | 4.7°C | 4.2°C | 4.3°C | 5.3°C | 5.2°C | +0.5°C |
| Avg Rain | 92 mm | 95 mm | 92 mm | 63 mm | 62 mm | -29 mm |
May temperatures in North Bay have risen by about 2.4°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -5.4°C (1981) to a record high of 29.6°C (2020).
Rainfall in May is about average for rainfall, averaging 82 mm, with a wettest year of 167 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.5°C per decade while lows rose 0.2°C per decade, widening the gap between day and night.
A good time to visit North Bay
May is a good time to visit North Bay, with days averaging 16.1°C and nights around 4.7°C (mean 10.4°C, warmer than North Bay'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 | 16.0°C | 10.3°C | 4.5°C | 24.0°C | -3.7°C | 65 mm | 77% | 0.6 m/s | 5.2 |
| 2024 | 19.3°C | 13.4°C | 7.5°C | 25.3°C | 3.0°C | 56 mm | 74% | 0.5 m/s | 5.4 |
| 2023 | 17.6°C | 11.0°C | 4.5°C | 28.8°C | -2.9°C | 52 mm | 68% | 0.6 m/s | 6.2 |
| 2022 | 19.1°C | 12.9°C | 6.6°C | 28.4°C | -1.7°C | 85 mm | 72% | 0.5 m/s | 5.6 |
| 2021 | 16.7°C | 10.6°C | 4.4°C | 25.3°C | -4.6°C | 49 mm | 71% | 0.6 m/s | 5.7 |
| 2020 | 15.4°C | 9.4°C | 3.5°C | 29.6°C | -4.9°C | 67 mm | 72% | 0.5 m/s | 5.4 |
| 2019 | 13.9°C | 8.5°C | 3.2°C | 19.5°C | -2.9°C | 72 mm | 78% | 0.5 m/s | 4.6 |
| 2018 | 18.8°C | 12.2°C | 5.6°C | 28.5°C | -2.3°C | 64 mm | 71% | 0.5 m/s | 6 |
| 2017 | 14.5°C | 9.4°C | 4.3°C | 23.4°C | -3.6°C | 85 mm | 79% | 0.6 m/s | 4.4 |
| 2016 | 17.7°C | 11.3°C | 4.8°C | 26.5°C | -2.6°C | 53 mm | 71% | 0.5 m/s | 5.7 |
| 2015 | 17.5°C | 11.7°C | 5.9°C | 24.1°C | -1.6°C | 76 mm | 75% | 0.6 m/s | 5 |
| 2014 | 16.5°C | 11.0°C | 5.6°C | 22.6°C | -0.7°C | 71 mm | 78% | 0.5 m/s | 5.2 |
| 2013 | 17.8°C | 11.7°C | 5.5°C | 25.7°C | -1.1°C | 75 mm | 73% | 0.6 m/s | 5.5 |
| 2012 | 18.8°C | 12.4°C | 6.1°C | 28.0°C | -1.3°C | 41 mm | 72% | 0.5 m/s | 5.8 |
| 2011 | 16.5°C | 10.8°C | 5.1°C | 26.5°C | -0.9°C | 38 mm | 77% | 0.5 m/s | 5.2 |
| 2010 | 18.9°C | 12.8°C | 6.7°C | 29.5°C | -2.8°C | 56 mm | 73% | 0.5 m/s | 5.5 |
| 2009 | 14.8°C | 8.9°C | 3.1°C | 20.7°C | -2.0°C | 68 mm | 75% | 0.5 m/s | 5.5 |
| 2008 | 13.8°C | 8.4°C | 3.0°C | 19.0°C | -1.4°C | 110 mm | 79% | 0.5 m/s | 5 |
| 2007 | 17.0°C | 10.7°C | 4.4°C | 25.4°C | -2.5°C | 41 mm | 74% | 0.5 m/s | 6 |
| 2006 | 17.3°C | 12.1°C | 6.8°C | 27.7°C | -0.8°C | 85 mm | 80% | 0.5 m/s | 5 |
| 2005 | 15.6°C | 9.7°C | 3.8°C | 23.3°C | -4.6°C | 28 mm | 75% | 0.5 m/s | 5.7 |
| 2004 | 14.1°C | 8.9°C | 3.7°C | 22.9°C | -4.4°C | 143 mm | 82% | 0.5 m/s | 4.8 |
| 2003 | 15.4°C | 10.1°C | 4.7°C | 21.4°C | -3.1°C | 106 mm | 81% | 0.4 m/s | 5 |
| 2002 | 12.2°C | 7.2°C | 2.2°C | 21.6°C | -2.5°C | 118 mm | 80% | 0.6 m/s | 4.8 |
| 2001 | 16.5°C | 11.4°C | 6.3°C | 21.9°C | -0.6°C | 123 mm | 80% | 0.5 m/s | 5.3 |
| 2000 | 15.2°C | 9.9°C | 4.6°C | 21.6°C | -3.2°C | 100 mm | 80% | 0.5 m/s | 4.9 |
| 1999 | 18.9°C | 12.4°C | 5.8°C | 25.8°C | -0.3°C | 93 mm | 73% | 0.5 m/s | 5.9 |
| 1998 🔥 | 19.7°C | 13.6°C | 7.4°C | 25.7°C | 2.9°C | 52 mm | 75% | 0.5 m/s | 6.2 |
| 1997 ❄️ | 11.5°C | 6.6°C | 1.6°C | 20.8°C | -3.4°C | 87 mm | 81% | 0.5 m/s | 4.9 |
| 1996 | 13.9°C | 8.1°C | 2.4°C | 21.3°C | -2.7°C | 36 mm | 76% | 0.5 m/s | 5.9 |
| 1995 🌧️ | 15.5°C | 10.0°C | 4.5°C | 23.3°C | -4.0°C | 167 mm | 79% | 0.4 m/s | 5.2 |
| 1994 | 14.7°C | 8.9°C | 3.1°C | 23.8°C | -2.8°C | 118 mm | 76% | 0.5 m/s | 5.7 |
| 1993 | 15.5°C | 10.1°C | 4.7°C | 26.6°C | -0.5°C | 118 mm | 79% | 0.5 m/s | 4.6 |
| 1992 | 15.6°C | 9.2°C | 2.7°C | 23.6°C | -3.0°C | 48 mm | 73% | 0.5 m/s | 6 |
| 1991 | 17.4°C | 11.9°C | 6.3°C | 26.1°C | -4.2°C | 88 mm | 79% | 0.5 m/s | 5.8 |
| 1990 | 14.5°C | 9.0°C | 3.6°C | 21.1°C | -2.6°C | 140 mm | 77% | 0.5 m/s | 4.9 |
| 1989 | 16.1°C | 11.0°C | 6.0°C | 25.1°C | -0.3°C | 114 mm | 81% | 0.5 m/s | 4.7 |
| 1988 | 17.3°C | 11.3°C | 5.3°C | 26.2°C | -1.2°C | 80 mm | 77% | 0.5 m/s | 5.5 |
| 1987 | 16.6°C | 10.9°C | 5.1°C | 25.9°C | -5.1°C | 82 mm | 76% | 0.5 m/s | 5.5 |
| 1986 | 17.0°C | 11.8°C | 6.6°C | 27.0°C | -4.4°C | 105 mm | 80% | 0.5 m/s | 5 |
| 1985 | 15.1°C | 9.6°C | 4.2°C | 22.2°C | -4.8°C | 73 mm | 79% | 0.5 m/s | 5.3 |
| 1984 | 12.5°C | 7.9°C | 3.2°C | 20.0°C | -2.4°C | 109 mm | 80% | 0.5 m/s | 4.2 |
| 1983 | 12.7°C | 7.4°C | 2.2°C | 22.1°C | -4.9°C | 158 mm | 81% | 0.5 m/s | — |
| 1982 | 18.0°C | 12.3°C | 6.7°C | 24.3°C | 1.0°C | 31 mm | 80% | 0.4 m/s | — |
| 1981 | 14.5°C | 8.8°C | 3.1°C | 24.2°C | -5.4°C | 72 mm | 79% | 0.5 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 16.1°C with lows near 4.7°C (mean 10.4°C), based on 45 years of NASA POWER data.
May averages 82 mm of rainfall in North Bay, about average for rainfall. The wettest on record was 167 mm in 1995.
The hottest May reached 29.6°C in 2020. The coldest dipped to -5.4°C in 1981.
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 14.6°C to 17.7°C and overnight lows from 3.9°C to 5.5°C over the same span.
May is one of the warmer months of the year in North Bay and about average for rainfall, so plan for around 16.1°C daytime highs and 4.7°C at night.
Not quite — May is the 8th coolest month in North Bay, averaging 10.4°C.
For May in North Bay, pack warm layers and a jacket for chilly mornings, with typical highs of 16.1°C and lows of 4.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 77% — quite humid.
Average wind speed in May is 0.5 m/s. The windiest May on record averaged 0.6 m/s (2002).
The wettest May on record was 1995 with 167 mm. On average, May sees 82 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 North Bay 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.
