May is one of the warmer months of the year in Lac-Brome, with average highs near 16.9°C and lows around 6.2°C (mean 11.5°C). It is about average for rainfall, averaging 101 mm of rainfall and 80% relative humidity across the period.
May is one of the warmer months of the year in Lac-Brome. Across 45 years of records, the warmest May in Lac-Brome was 1998 — when the month averaged 14.4°C — while the coldest was 1997 at 8.1°C. Typical May days reach 16.9°C with nights near 6.2°C. The long-term trend is warming, about 0.3°C per decade.
May is about average for rainfall in Lac-Brome, averaging 101 mm of rainfall. The wettest May on record was 2006 with 193 mm, while the driest was 1982 at 34 mm.
Relative humidity in Lac-Brome during May averages 80%. The most humid May was 2011 at 85%, and the least humid was 2021 at 75%.
May receives about 5.3 kWh/m²/day of solar energy in Lac-Brome. The sunniest May was 2023 at 6.3 kWh/m²/day, and the cloudiest was 1984 at 4.
Average wind speed in Lac-Brome during May is 0.3 m/s. The windiest Mays were 2023, 2024 and 2025, among others at 0.3 m/s, while the calmest was 2011 at 0.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.4°C | 11.1°C | 10.9°C | 12.4°C | 12.3°C | +0.9°C |
| Avg High | 16.7°C | 16.4°C | 16.2°C | 17.8°C | 17.8°C | +1.1°C |
| Avg Low | 6.0°C | 5.7°C | 5.7°C | 7.0°C | 6.8°C | +0.8°C |
| Avg Rain | 105 mm | 94 mm | 113 mm | 102 mm | 83 mm | -22 mm |
May temperatures in Lac-Brome have risen by about 1.9°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -4.2°C (1995) to a record high of 29.8°C (2020).
Rainfall in May is about average for rainfall, averaging 101 mm, with a wettest year of 193 mm.
A good time to visit Lac-Brome
May is a good time to visit Lac-Brome, with days averaging 16.9°C and nights around 6.2°C (mean 11.5°C, warmer than Lac-Brome'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 | 17.1°C | 12.3°C | 7.6°C | 26.4°C | -1.2°C | 144 mm | 82% | 0.3 m/s | 4.5 |
| 2024 | 19.2°C | 14.3°C | 9.3°C | 27.6°C | 3.6°C | 94 mm | 81% | 0.3 m/s | 5.2 |
| 2023 | 16.9°C | 10.9°C | 4.9°C | 28.2°C | -3.2°C | 48 mm | 75% | 0.3 m/s | 6.3 |
| 2022 | 19.9°C | 13.6°C | 7.3°C | 29.0°C | -1.9°C | 95 mm | 76% | 0.3 m/s | 5.9 |
| 2021 | 17.4°C | 12.0°C | 6.5°C | 27.6°C | -0.3°C | 47 mm | 75% | 0.3 m/s | 5.7 |
| 2020 | 16.2°C | 10.7°C | 5.2°C | 29.8°C | -3.0°C | 69 mm | 78% | 0.3 m/s | 6.2 |
| 2019 | 14.7°C | 9.9°C | 5.0°C | 23.0°C | -2.1°C | 126 mm | 81% | 0.3 m/s | 4.7 |
| 2018 | 19.1°C | 13.0°C | 6.9°C | 26.3°C | 0.2°C | 58 mm | 77% | 0.3 m/s | 5.9 |
| 2017 | 16.0°C | 11.1°C | 6.2°C | 27.6°C | -1.8°C | 108 mm | 81% | 0.3 m/s | 4.5 |
| 2016 | 17.2°C | 11.6°C | 6.0°C | 26.1°C | -1.9°C | 59 mm | 79% | 0.3 m/s | 5.5 |
| 2015 | 20.1°C | 14.0°C | 8.0°C | 27.1°C | -1.2°C | 84 mm | 76% | 0.3 m/s | 5.7 |
| 2014 | 16.9°C | 11.8°C | 6.6°C | 25.4°C | -1.5°C | 109 mm | 82% | 0.3 m/s | 5.2 |
| 2013 | 18.8°C | 12.9°C | 7.0°C | 27.4°C | -0.7°C | 143 mm | 78% | 0.3 m/s | 5.4 |
| 2012 | 19.1°C | 14.1°C | 9.1°C | 28.6°C | 2.7°C | 104 mm | 80% | 0.3 m/s | 5.4 |
| 2011 | 18.0°C | 13.1°C | 8.1°C | 27.3°C | -0.2°C | 180 mm | 85% | 0.2 m/s | 4.6 |
| 2010 | 18.6°C | 12.8°C | 7.0°C | 27.7°C | -2.7°C | 54 mm | 78% | 0.3 m/s | 5.9 |
| 2009 | 16.1°C | 10.7°C | 5.3°C | 24.7°C | -0.8°C | 120 mm | 79% | 0.3 m/s | 5 |
| 2008 | 15.6°C | 10.1°C | 4.6°C | 21.4°C | -2.3°C | 61 mm | 78% | 0.3 m/s | 5.6 |
| 2007 | 16.6°C | 11.0°C | 5.4°C | 26.9°C | -0.8°C | 94 mm | 80% | 0.3 m/s | 5.8 |
| 2006 🌧️ | 16.8°C | 12.1°C | 7.4°C | 27.4°C | 0.0°C | 193 mm | 85% | 0.3 m/s | 4.6 |
| 2005 | 13.8°C | 9.2°C | 4.6°C | 23.6°C | -3.9°C | 78 mm | 82% | 0.3 m/s | 5 |
| 2004 | 17.5°C | 12.0°C | 6.6°C | 25.4°C | -3.8°C | 127 mm | 81% | 0.3 m/s | 5 |
| 2003 | 16.4°C | 11.0°C | 5.6°C | 25.8°C | -0.6°C | 116 mm | 80% | 0.3 m/s | 5.1 |
| 2002 | 14.7°C | 9.5°C | 4.2°C | 24.2°C | -0.3°C | 130 mm | 79% | 0.3 m/s | 4.8 |
| 2001 | 18.6°C | 12.7°C | 6.8°C | 25.5°C | 1.1°C | 61 mm | 79% | 0.3 m/s | 5.3 |
| 2000 | 16.3°C | 11.1°C | 6.0°C | 25.3°C | -0.7°C | 152 mm | 82% | 0.3 m/s | 4.8 |
| 1999 | 19.5°C | 13.5°C | 7.4°C | 27.6°C | -1.9°C | 79 mm | 76% | 0.3 m/s | 5.9 |
| 1998 🔥 | 20.1°C | 14.4°C | 8.6°C | 26.2°C | 3.2°C | 72 mm | 79% | 0.3 m/s | 5.7 |
| 1997 ❄️ | 12.7°C | 8.1°C | 3.5°C | 21.2°C | -2.6°C | 110 mm | 82% | 0.3 m/s | 4.6 |
| 1996 | 14.7°C | 9.8°C | 4.8°C | 24.3°C | -0.7°C | 119 mm | 79% | 0.3 m/s | 5.8 |
| 1995 | 16.0°C | 10.7°C | 5.4°C | 23.6°C | -4.2°C | 92 mm | 79% | 0.3 m/s | 5.1 |
| 1994 | 15.6°C | 10.1°C | 4.7°C | 25.6°C | -1.4°C | 126 mm | 81% | 0.3 m/s | 5.2 |
| 1993 | 16.3°C | 11.2°C | 6.2°C | 22.6°C | 1.6°C | 86 mm | 81% | 0.3 m/s | 4.7 |
| 1992 | 16.9°C | 10.7°C | 4.5°C | 25.8°C | -1.6°C | 55 mm | 77% | 0.3 m/s | 6.1 |
| 1991 | 18.0°C | 12.7°C | 7.5°C | 26.3°C | 1.7°C | 97 mm | 80% | 0.3 m/s | 5.3 |
| 1990 | 14.6°C | 9.5°C | 4.4°C | 22.3°C | -0.5°C | 104 mm | 80% | 0.3 m/s | 4.9 |
| 1989 | 17.7°C | 12.8°C | 7.9°C | 26.2°C | 1.3°C | 139 mm | 82% | 0.3 m/s | 4.5 |
| 1988 | 17.8°C | 12.2°C | 6.5°C | 22.7°C | 1.4°C | 47 mm | 80% | 0.3 m/s | 5.1 |
| 1987 | 17.0°C | 11.1°C | 5.3°C | 26.6°C | -3.3°C | 82 mm | 78% | 0.3 m/s | 5.4 |
| 1986 | 18.2°C | 12.8°C | 7.4°C | 25.3°C | -4.0°C | 115 mm | 81% | 0.3 m/s | 5.1 |
| 1985 | 16.0°C | 10.5°C | 5.0°C | 24.3°C | -3.3°C | 82 mm | 79% | 0.3 m/s | 5.6 |
| 1984 | 13.9°C | 9.3°C | 4.8°C | 23.1°C | -2.5°C | 169 mm | 81% | 0.3 m/s | 4 |
| 1983 | 14.6°C | 9.6°C | 4.6°C | 20.8°C | -1.5°C | 168 mm | 83% | 0.3 m/s | — |
| 1982 | 18.0°C | 12.2°C | 6.4°C | 25.3°C | 0.8°C | 34 mm | 79% | 0.3 m/s | — |
| 1981 | 17.5°C | 11.7°C | 6.0°C | 23.6°C | -2.3°C | 110 mm | 80% | 0.3 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 16.9°C with lows near 6.2°C (mean 11.5°C), based on 45 years of NASA POWER data.
May averages 101 mm of rainfall in Lac-Brome, about average for rainfall. The wettest on record was 193 mm in 2006.
The hottest May reached 29.8°C in 2020. The coldest dipped to -4.2°C in 1995.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.9°C. Daytime highs moved from 16°C to 18.1°C and overnight lows from 5.4°C to 7.1°C over the same span.
May is one of the warmer months of the year in Lac-Brome and about average for rainfall, so plan for around 16.9°C daytime highs and 6.2°C at night.
Not quite — May is the 8th coolest month in Lac-Brome, averaging 11.5°C.
For May in Lac-Brome, pack warm layers and a jacket for chilly mornings, with typical highs of 16.9°C and lows of 6.2°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 0.3 m/s (1981).
The wettest May on record was 2006 with 193 mm. On average, May sees 101 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 Lac-Brome 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.
