May is one of the warmer months of the year in Conception Bay South, with average highs near 10.2°C and lows around 2°C (mean 6.1°C). It is one of the drier months, averaging 87 mm of rainfall and 85% relative humidity across the period.
May is one of the warmer months of the year in Conception Bay South. Across 45 years of records, the warmest May in Conception Bay South was 1999 — when the month averaged 9.3°C — while the coldest was 2019 at 4.3°C. Typical May days reach 10.2°C with nights near 2°C. The long-term trend is cooling, about 0.2°C per decade.
May is one of the drier months in Conception Bay South, averaging 87 mm of rainfall. The wettest May on record was 1990 with 145 mm, while the driest was 1989 at 30 mm.
Relative humidity in Conception Bay South during May averages 85%. The most humid May was 1993 at 89%, and the least humid was 2004 at 79%.
May receives about 4.8 kWh/m²/day of solar energy in Conception Bay South. The sunniest May was 1989 at 5.6 kWh/m²/day, and the cloudiest was 1993 at 3.9.
Average wind speed in Conception Bay South during May is 1.4 m/s. The windiest May was 1990 at 1.8 m/s, while the calmest was 1989 at 1.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 7.0°C | 5.7°C | 6.0°C | 5.9°C | 6.1°C | -0.9°C |
| Avg High | 11.3°C | 9.8°C | 10.1°C | 9.7°C | 10.1°C | -1.2°C |
| Avg Low | 2.7°C | 1.6°C | 1.9°C | 2.0°C | 2.0°C | -0.7°C |
| Avg Rain | 77 mm | 96 mm | 88 mm | 93 mm | 77 mm | 0 mm |
May temperatures in Conception Bay South have fallen by about 0.7°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -4.1°C (1989) to a record high of 22°C (1999).
Rainfall in May is one of the drier months, averaging 87 mm, with a wettest year of 145 mm.
A good time to visit Conception Bay South
May is a good time to visit Conception Bay South, with days averaging 10.2°C and nights around 2°C (mean 6.1°C, close to Conception Bay South's yearly average) and higher rainfall. August and July 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 | 10.4°C | 6.1°C | 1.8°C | 21.5°C | -2.2°C | 71 mm | 84% | 1.3 m/s | 4.8 |
| 2024 | 10.3°C | 6.5°C | 2.7°C | 19.6°C | -0.8°C | 75 mm | 88% | 1.2 m/s | 4.6 |
| 2023 | 8.9°C | 5.1°C | 1.2°C | 15.0°C | -1.5°C | 99 mm | 84% | 1.6 m/s | 5 |
| 2022 | 10.7°C | 6.3°C | 1.9°C | 17.2°C | -1.8°C | 74 mm | 82% | 1.3 m/s | 5.4 |
| 2021 | 10.4°C | 6.5°C | 2.7°C | 17.0°C | -0.5°C | 39 mm | 82% | 1.5 m/s | 5.5 |
| 2020 | 9.9°C | 5.8°C | 1.7°C | 19.7°C | -1.3°C | 101 mm | 84% | 1.6 m/s | 5.1 |
| 2019 ❄️ | 7.7°C | 4.3°C | 0.9°C | 13.7°C | -1.8°C | 80 mm | 86% | 1.5 m/s | 4.7 |
| 2018 | 9.3°C | 5.2°C | 1.1°C | 15.8°C | -3.0°C | 122 mm | 81% | 1.7 m/s | 5.3 |
| 2017 | 8.4°C | 4.5°C | 0.7°C | 13.9°C | -3.8°C | 79 mm | 86% | 1.3 m/s | 5 |
| 2016 | 11.2°C | 6.9°C | 2.6°C | 17.7°C | -1.4°C | 85 mm | 85% | 1.3 m/s | 4.7 |
| 2015 | 10.4°C | 6.2°C | 2.0°C | 16.1°C | -1.8°C | 71 mm | 86% | 1.5 m/s | 5.1 |
| 2014 | 9.0°C | 4.9°C | 0.9°C | 17.9°C | -2.6°C | 98 mm | 85% | 1.2 m/s | 4.6 |
| 2013 | 11.5°C | 7.5°C | 3.4°C | 17.1°C | -0.4°C | 80 mm | 87% | 1.5 m/s | 4.6 |
| 2012 | 11.2°C | 7.3°C | 3.4°C | 20.9°C | -2.1°C | 84 mm | 85% | 1.5 m/s | 4.8 |
| 2011 | 9.8°C | 6.3°C | 2.8°C | 17.5°C | -0.6°C | 115 mm | 88% | 1.4 m/s | 4.2 |
| 2010 | 8.9°C | 5.5°C | 2.1°C | 13.9°C | -0.2°C | 120 mm | 87% | 1.6 m/s | 4.3 |
| 2009 | 11.6°C | 7.1°C | 2.6°C | 18.2°C | -2.3°C | 111 mm | 83% | 1.3 m/s | 5.2 |
| 2008 | 9.1°C | 5.7°C | 2.4°C | 16.1°C | -0.2°C | 115 mm | 88% | 1.6 m/s | 4.3 |
| 2007 | 9.3°C | 5.3°C | 1.2°C | 17.6°C | -2.9°C | 77 mm | 85% | 1.4 m/s | 4.4 |
| 2006 | 12.0°C | 7.6°C | 3.3°C | 20.2°C | -1.9°C | 70 mm | 85% | 1.2 m/s | 4.9 |
| 2005 | 9.7°C | 5.8°C | 1.9°C | 18.0°C | -2.9°C | 114 mm | 88% | 1.2 m/s | 4.4 |
| 2004 | 9.6°C | 5.5°C | 1.4°C | 12.9°C | -1.6°C | 58 mm | 79% | 1.5 m/s | 5.5 |
| 2003 | 9.6°C | 5.4°C | 1.2°C | 16.3°C | -2.2°C | 90 mm | 83% | 1.4 m/s | 5.1 |
| 2002 | 10.0°C | 5.8°C | 1.7°C | 16.4°C | -1.6°C | 101 mm | 82% | 1.5 m/s | 5.1 |
| 2001 | 9.0°C | 5.1°C | 1.3°C | 20.8°C | -3.5°C | 74 mm | 86% | 1.6 m/s | 4.3 |
| 2000 | 10.7°C | 6.4°C | 2.1°C | 18.6°C | -2.9°C | 70 mm | 82% | 1.5 m/s | 4.7 |
| 1999 🔥 | 14.2°C | 9.3°C | 4.3°C | 22.0°C | -2.0°C | 72 mm | 82% | 1.2 m/s | 5.4 |
| 1998 | 11.5°C | 7.3°C | 3.0°C | 18.6°C | -1.2°C | 90 mm | 84% | 1.5 m/s | 5 |
| 1997 | 9.1°C | 5.2°C | 1.3°C | 12.8°C | -2.1°C | 128 mm | 88% | 1.3 m/s | 4.4 |
| 1996 | 9.2°C | 5.2°C | 1.2°C | 14.5°C | -2.6°C | 79 mm | 83% | 1.3 m/s | 4.6 |
| 1995 | 8.5°C | 4.7°C | 1.0°C | 17.8°C | -2.8°C | 39 mm | 85% | 1.3 m/s | 5.1 |
| 1994 | 9.4°C | 5.5°C | 1.5°C | 14.9°C | -2.1°C | 105 mm | 87% | 1.5 m/s | 4.9 |
| 1993 | 9.0°C | 5.4°C | 1.8°C | 17.6°C | -3.7°C | 98 mm | 89% | 1.4 m/s | 3.9 |
| 1992 | 10.2°C | 5.6°C | 1.0°C | 18.3°C | -2.3°C | 117 mm | 84% | 1.5 m/s | 5.1 |
| 1991 | 8.7°C | 4.5°C | 0.4°C | 16.8°C | -2.3°C | 83 mm | 83% | 1.6 m/s | 4.7 |
| 1990 🌧️ | 8.2°C | 4.4°C | 0.6°C | 17.0°C | -2.6°C | 145 mm | 85% | 1.8 m/s | 4.5 |
| 1989 | 13.2°C | 7.7°C | 2.3°C | 19.9°C | -4.1°C | 30 mm | 81% | 1.1 m/s | 5.6 |
| 1988 | 13.1°C | 8.3°C | 3.6°C | 19.4°C | -1.9°C | 55 mm | 84% | 1.4 m/s | 4.6 |
| 1987 | 11.4°C | 6.8°C | 2.2°C | 17.3°C | -2.5°C | 54 mm | 81% | 1.4 m/s | 5.1 |
| 1986 | 10.2°C | 6.0°C | 1.8°C | 19.7°C | -1.7°C | 39 mm | 85% | 1.4 m/s | 5.1 |
| 1985 | 9.0°C | 4.9°C | 0.8°C | 15.3°C | -3.0°C | 110 mm | 85% | 1.6 m/s | 4.7 |
| 1984 | 11.5°C | 7.5°C | 3.5°C | 18.6°C | 0.7°C | 134 mm | 88% | 1.3 m/s | 4.7 |
| 1983 | 10.9°C | 7.2°C | 3.5°C | 17.7°C | -0.2°C | 84 mm | 87% | 1.3 m/s | — |
| 1982 | 9.5°C | 5.9°C | 2.3°C | 16.6°C | -0.1°C | 126 mm | 88% | 1.5 m/s | — |
| 1981 | 13.1°C | 8.7°C | 4.4°C | 19.1°C | 0.8°C | 65 mm | 85% | 1.2 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 10.2°C with lows near 2°C (mean 6.1°C), based on 45 years of NASA POWER data.
May averages 87 mm of rainfall in Conception Bay South, one of the drier months. The wettest on record was 145 mm in 1990.
The hottest May reached 22°C in 1999. The coldest dipped to -4.1°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have fallen by about 0.7°C. Daytime highs moved from 10.8°C to 10.1°C and overnight lows from 2.9°C to 2.1°C over the same span.
May is one of the warmer months of the year in Conception Bay South and one of the drier months, so plan for around 10.2°C daytime highs and 2°C at night.
Not quite — May is the 7th coolest month in Conception Bay South, averaging 6.1°C.
For May in Conception Bay South, pack warm layers and a jacket for chilly mornings, with typical highs of 10.2°C and lows of 2°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 85% — quite humid.
Average wind speed in May is 1.4 m/s. The windiest May on record averaged 1.8 m/s (1990).
The wettest May on record was 1990 with 145 mm. On average, May sees 87 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 Conception Bay South 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.
