May is one of the warmer months of the year in Gander, with average highs near 12°C and lows around 1.5°C (mean 6.8°C). It is one of the drier months, averaging 86 mm of rainfall and 83% relative humidity across the period.
May is one of the warmer months of the year in Gander. Across 45 years of records, the warmest May in Gander was 1999 — when the month averaged 10°C — while the coldest was 2019 at 4.6°C. Typical May days reach 12°C with nights near 1.5°C. The long-term trend is cooling, about 0.2°C per decade.
May is one of the drier months in Gander, averaging 86 mm of rainfall. The wettest May on record was 2010 with 152 mm, while the driest was 1989 at 28 mm.
Relative humidity in Gander during May averages 83%. The most humid May was 2010 at 88%, and the least humid was 2004 at 77%.
May receives about 4.7 kWh/m²/day of solar energy in Gander. The sunniest May was 1999 at 5.5 kWh/m²/day, and the cloudiest was 1993 at 3.2.
Average wind speed in Gander during May is 0.9 m/s. The windiest Mays were 2018, 2020 and 2021, among others at 1 m/s, while the calmest were 1995, 2014 and 2024 at 0.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 7.9°C | 6.3°C | 6.6°C | 6.5°C | 6.5°C | -1.4°C |
| Avg High | 13.4°C | 11.4°C | 11.8°C | 11.5°C | 11.7°C | -1.7°C |
| Avg Low | 2.4°C | 1.2°C | 1.4°C | 1.3°C | 1.4°C | -1°C |
| Avg Rain | 78 mm | 98 mm | 83 mm | 92 mm | 74 mm | -4 mm |
May temperatures in Gander have fallen by about 1°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -8.5°C (2018) to a record high of 26.6°C (2012).
Rainfall in May is one of the drier months, averaging 86 mm, with a wettest year of 152 mm.
A good time to visit Gander
May is a good time to visit Gander, with days averaging 12°C and nights around 1.5°C (mean 6.8°C, warmer than Gander'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 | 11.5°C | 6.4°C | 1.3°C | 22.3°C | -3.7°C | 45 mm | 82% | 0.9 m/s | 5 |
| 2024 | 12.0°C | 7.1°C | 2.1°C | 21.2°C | -2.3°C | 96 mm | 85% | 0.7 m/s | 4.4 |
| 2023 | 11.0°C | 5.8°C | 0.7°C | 19.5°C | -3.7°C | 77 mm | 82% | 0.9 m/s | 4.8 |
| 2022 | 12.0°C | 6.3°C | 0.5°C | 20.0°C | -3.8°C | 78 mm | 80% | 0.8 m/s | 5.1 |
| 2021 | 11.8°C | 7.0°C | 2.2°C | 23.3°C | -2.0°C | 65 mm | 81% | 1 m/s | 4.7 |
| 2020 | 11.8°C | 6.6°C | 1.4°C | 26.1°C | -3.1°C | 83 mm | 81% | 1 m/s | 4.4 |
| 2019 ❄️ | 8.6°C | 4.6°C | 0.5°C | 18.1°C | -2.4°C | 60 mm | 85% | 0.9 m/s | 4.5 |
| 2018 | 10.2°C | 4.7°C | -0.9°C | 19.9°C | -8.5°C | 108 mm | 79% | 1 m/s | 5.1 |
| 2017 | 10.5°C | 5.1°C | -0.4°C | 17.9°C | -4.5°C | 86 mm | 84% | 0.8 m/s | 5 |
| 2016 | 12.6°C | 7.3°C | 2.1°C | 22.5°C | -1.2°C | 99 mm | 84% | 0.8 m/s | 4.4 |
| 2015 | 13.6°C | 7.7°C | 1.8°C | 24.2°C | -3.4°C | 70 mm | 81% | 0.8 m/s | 5.1 |
| 2014 | 10.6°C | 5.7°C | 0.8°C | 23.7°C | -3.7°C | 74 mm | 84% | 0.7 m/s | 4.6 |
| 2013 | 14.0°C | 8.4°C | 2.9°C | 24.0°C | -3.5°C | 116 mm | 84% | 1 m/s | 4.7 |
| 2012 | 13.7°C | 8.6°C | 3.4°C | 26.6°C | -3.7°C | 58 mm | 83% | 0.9 m/s | 4.9 |
| 2011 | 12.2°C | 7.0°C | 1.7°C | 23.6°C | -2.6°C | 92 mm | 84% | 0.9 m/s | 4.3 |
| 2010 🌧️ | 9.5°C | 5.5°C | 1.5°C | 19.4°C | -1.2°C | 152 mm | 88% | 1 m/s | 4.1 |
| 2009 | 13.0°C | 7.3°C | 1.5°C | 22.0°C | -7.6°C | 105 mm | 80% | 0.9 m/s | 5.1 |
| 2008 | 11.7°C | 6.9°C | 2.2°C | 20.6°C | -1.6°C | 86 mm | 84% | 0.9 m/s | 4.3 |
| 2007 | 10.5°C | 5.1°C | -0.2°C | 20.0°C | -4.2°C | 94 mm | 84% | 0.8 m/s | 4.4 |
| 2006 | 13.9°C | 8.4°C | 3.0°C | 23.6°C | -3.4°C | 69 mm | 83% | 0.8 m/s | 5 |
| 2005 | 12.7°C | 7.6°C | 2.4°C | 22.8°C | -1.4°C | 74 mm | 84% | 0.8 m/s | 4.6 |
| 2004 | 11.6°C | 6.2°C | 0.8°C | 18.0°C | -2.0°C | 64 mm | 77% | 1 m/s | 5.4 |
| 2003 | 11.5°C | 6.2°C | 0.8°C | 20.6°C | -4.1°C | 109 mm | 82% | 0.9 m/s | 4.9 |
| 2002 | 11.8°C | 6.6°C | 1.4°C | 21.5°C | -3.2°C | 74 mm | 81% | 0.9 m/s | 4.8 |
| 2001 | 10.2°C | 5.7°C | 1.2°C | 21.9°C | -4.3°C | 76 mm | 85% | 0.9 m/s | 4.5 |
| 2000 | 11.5°C | 6.2°C | 0.9°C | 19.2°C | -4.2°C | 81 mm | 82% | 0.9 m/s | 4.7 |
| 1999 🔥 | 16.3°C | 10.0°C | 3.7°C | 26.3°C | -3.7°C | 79 mm | 80% | 0.8 m/s | 5.5 |
| 1998 | 13.4°C | 8.4°C | 3.3°C | 22.1°C | -3.5°C | 88 mm | 84% | 0.9 m/s | 4.5 |
| 1997 | 11.1°C | 6.3°C | 1.4°C | 16.7°C | -3.4°C | 112 mm | 86% | 0.9 m/s | 4.4 |
| 1996 | 10.6°C | 5.7°C | 0.8°C | 17.7°C | -3.6°C | 91 mm | 82% | 0.9 m/s | 3.9 |
| 1995 | 9.6°C | 5.2°C | 0.9°C | 20.0°C | -3.0°C | 39 mm | 85% | 0.7 m/s | 5.1 |
| 1994 | 11.0°C | 5.8°C | 0.7°C | 18.5°C | -4.1°C | 127 mm | 84% | 0.9 m/s | 4.5 |
| 1993 | 10.6°C | 5.9°C | 1.2°C | 22.8°C | -6.1°C | 97 mm | 88% | 0.9 m/s | 3.2 |
| 1992 | 11.2°C | 5.6°C | 0.0°C | 23.4°C | -3.4°C | 84 mm | 82% | 0.9 m/s | 4.5 |
| 1991 | 10.5°C | 5.2°C | -0.1°C | 16.8°C | -4.0°C | 109 mm | 82% | 0.9 m/s | 4.3 |
| 1990 | 9.7°C | 5.0°C | 0.3°C | 21.3°C | -3.7°C | 150 mm | 83% | 1 m/s | 4.3 |
| 1989 | 16.4°C | 9.6°C | 2.7°C | 23.1°C | -4.9°C | 28 mm | 78% | 0.8 m/s | 5.2 |
| 1988 | 15.1°C | 9.4°C | 3.7°C | 24.2°C | -3.9°C | 81 mm | 83% | 0.8 m/s | 4.5 |
| 1987 | 13.6°C | 7.7°C | 1.8°C | 20.0°C | -2.8°C | 74 mm | 80% | 0.9 m/s | 4.9 |
| 1986 | 12.8°C | 7.1°C | 1.3°C | 23.9°C | -2.5°C | 45 mm | 81% | 0.9 m/s | 4.9 |
| 1985 | 10.9°C | 5.5°C | 0.1°C | 21.3°C | -4.0°C | 72 mm | 83% | 0.9 m/s | 4.9 |
| 1984 | 14.2°C | 8.9°C | 3.6°C | 23.4°C | -0.7°C | 93 mm | 86% | 0.9 m/s | 4.5 |
| 1983 | 12.0°C | 7.3°C | 2.5°C | 19.8°C | -1.9°C | 85 mm | 85% | 0.8 m/s | — |
| 1982 | 11.5°C | 6.8°C | 2.1°C | 18.4°C | -1.9°C | 115 mm | 85% | 0.9 m/s | — |
| 1981 | 14.5°C | 9.1°C | 3.8°C | 23.2°C | -1.6°C | 111 mm | 84% | 0.8 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 12°C with lows near 1.5°C (mean 6.8°C), based on 45 years of NASA POWER data.
May averages 86 mm of rainfall in Gander, one of the drier months. The wettest on record was 152 mm in 2010.
The hottest May reached 26.6°C in 2012. The coldest dipped to -8.5°C in 2018.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have fallen by about 1°C. Daytime highs moved from 12.6°C to 11.7°C and overnight lows from 2.4°C to 1.4°C over the same span.
May is one of the warmer months of the year in Gander and one of the drier months, so plan for around 12°C daytime highs and 1.5°C at night.
Not quite — May is the 8th coolest month in Gander, averaging 6.8°C.
For May in Gander, pack warm layers and a jacket for chilly mornings, with typical highs of 12°C and lows of 1.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 83% — quite humid.
Average wind speed in May is 0.9 m/s. The windiest May on record averaged 1 m/s (1990).
The wettest May on record was 2010 with 152 mm. On average, May sees 86 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 Gander 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.
