May is one of the warmer months of the year in Bay Shore, with average highs near 15.1°C and lows around 11.4°C (mean 13.3°C). It is about average for rainfall, averaging 104 mm of rainfall and 86% relative humidity across the period.
May is one of the warmer months of the year in Bay Shore. Across 45 years of records, the warmest May in Bay Shore was 2012 — when the month averaged 15.5°C — while the coldest was 1992 at 11.3°C. Typical May days reach 15.1°C with nights near 11.4°C. The long-term trend is warming, about 0.2°C per decade.
May is about average for rainfall in Bay Shore, averaging 104 mm of rainfall. The wettest May on record was 1989 with 245 mm, while the driest was 2015 at 18 mm.
Relative humidity in Bay Shore during May averages 86%. The most humid May was 2004 at 90%, and the least humid was 2023 at 79%.
May receives about 5.6 kWh/m²/day of solar energy in Bay Shore. The sunniest Mays were 1986, 2007 and 2023 at 6.7 kWh/m²/day, and the cloudiest was 1984 at 4.2.
Average wind speed in Bay Shore during May is 4.3 m/s. The windiest May was 1997 at 5.4 m/s, while the calmest was 1982 at 3.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.1°C | 12.9°C | 13.0°C | 13.8°C | 13.5°C | +0.4°C |
| Avg High | 15.1°C | 14.9°C | 14.9°C | 15.6°C | 15.4°C | +0.3°C |
| Avg Low | 11.1°C | 10.9°C | 11.2°C | 12.1°C | 11.7°C | +0.6°C |
| Avg Rain | 115 mm | 97 mm | 95 mm | 112 mm | 104 mm | -11 mm |
May temperatures in Bay Shore have risen by about 0.8°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 3.4°C (2020) to a record high of 25.3°C (2022).
Rainfall in May is about average for rainfall, averaging 104 mm, with a wettest year of 245 mm.
A good time to visit Bay Shore
May is a good time to visit Bay Shore, with days averaging 15.1°C and nights around 11.4°C (mean 13.3°C, warmer than Bay Shore'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 | 15.7°C | 14.0°C | 12.4°C | 20.1°C | 9.6°C | 198 mm | 88% | 4.5 m/s | 4.9 |
| 2024 | 15.7°C | 14.1°C | 12.5°C | 21.0°C | 9.2°C | 79 mm | 89% | 4.1 m/s | 5.5 |
| 2023 | 15.9°C | 13.9°C | 12.0°C | 19.5°C | 8.8°C | 52 mm | 79% | 4.1 m/s | 6.7 |
| 2022 | 15.4°C | 13.5°C | 11.7°C | 25.3°C | 7.4°C | 98 mm | 87% | 4.6 m/s | 5.5 |
| 2021 | 16.0°C | 13.8°C | 11.7°C | 23.3°C | 5.6°C | 148 mm | 82% | 4.3 m/s | 6 |
| 2020 | 13.7°C | 11.7°C | 9.8°C | 19.0°C | 3.4°C | 49 mm | 84% | 4.9 m/s | 6.1 |
| 2019 | 15.2°C | 13.4°C | 11.6°C | 22.0°C | 7.2°C | 170 mm | 88% | 4.6 m/s | 5.3 |
| 2018 | 15.6°C | 13.8°C | 12.0°C | 21.3°C | 7.2°C | 131 mm | 90% | 3.9 m/s | 5.1 |
| 2017 | 14.6°C | 13.0°C | 11.3°C | 20.7°C | 7.3°C | 202 mm | 86% | 4.7 m/s | 5.4 |
| 2016 | 14.7°C | 13.0°C | 11.3°C | 21.9°C | 6.8°C | 146 mm | 88% | 4.3 m/s | 5 |
| 2015 | 15.9°C | 14.2°C | 12.4°C | 20.1°C | 7.3°C | 18 mm | 88% | 4.2 m/s | 6.3 |
| 2014 | 15.4°C | 13.6°C | 11.7°C | 20.8°C | 8.2°C | 82 mm | 86% | 4 m/s | 5.6 |
| 2013 | 14.9°C | 13.1°C | 11.4°C | 20.7°C | 7.1°C | 96 mm | 87% | 4.7 m/s | 5.7 |
| 2012 🔥 | 16.9°C | 15.5°C | 14.0°C | 23.2°C | 9.5°C | 116 mm | 89% | 3.9 m/s | 5.2 |
| 2011 | 16.2°C | 14.6°C | 13.1°C | 24.0°C | 8.3°C | 86 mm | 89% | 4 m/s | 5.4 |
| 2010 | 16.2°C | 14.2°C | 12.2°C | 21.5°C | 6.3°C | 76 mm | 86% | 4.4 m/s | 6.1 |
| 2009 | 14.9°C | 13.3°C | 11.8°C | 20.5°C | 9.3°C | 131 mm | 88% | 4.2 m/s | 5.1 |
| 2008 | 14.5°C | 12.6°C | 10.6°C | 18.1°C | 7.4°C | 101 mm | 83% | 4.9 m/s | 5.7 |
| 2007 | 15.5°C | 13.5°C | 11.6°C | 21.9°C | 7.1°C | 51 mm | 84% | 4 m/s | 6.7 |
| 2006 | 15.3°C | 13.4°C | 11.5°C | 21.7°C | 8.3°C | 118 mm | 85% | 4.2 m/s | 5.7 |
| 2005 | 13.6°C | 11.9°C | 10.2°C | 17.7°C | 7.3°C | 68 mm | 84% | 4.3 m/s | 5.9 |
| 2004 | 15.9°C | 14.1°C | 12.2°C | 20.7°C | 7.0°C | 89 mm | 90% | 4.1 m/s | 5.5 |
| 2003 | 12.9°C | 11.4°C | 9.8°C | 17.9°C | 7.8°C | 118 mm | 89% | 3.8 m/s | 4.4 |
| 2002 | 15.0°C | 12.9°C | 10.9°C | 19.0°C | 7.2°C | 109 mm | 82% | 4.8 m/s | 6.3 |
| 2001 | 15.5°C | 13.6°C | 11.7°C | 20.3°C | 7.6°C | 74 mm | 84% | 4.2 m/s | 5.8 |
| 2000 | 15.4°C | 13.7°C | 11.9°C | 21.4°C | 6.9°C | 96 mm | 86% | 4.3 m/s | 5.4 |
| 1999 | 15.7°C | 13.8°C | 12.0°C | 23.0°C | 7.6°C | 72 mm | 82% | 4 m/s | 5.8 |
| 1998 | 15.1°C | 13.2°C | 11.3°C | 23.6°C | 6.4°C | 189 mm | 89% | 4.5 m/s | 5.3 |
| 1997 | 14.2°C | 12.2°C | 10.2°C | 18.5°C | 6.6°C | 89 mm | 81% | 5.4 m/s | 6.1 |
| 1996 | 14.2°C | 12.3°C | 10.4°C | 20.9°C | 6.4°C | 73 mm | 84% | 4.2 m/s | 5.5 |
| 1995 | 14.2°C | 12.3°C | 10.4°C | 19.9°C | 4.9°C | 68 mm | 84% | 4.1 m/s | 5.4 |
| 1994 | 14.6°C | 12.4°C | 10.2°C | 19.1°C | 7.3°C | 93 mm | 83% | 4.8 m/s | 6 |
| 1993 | 15.5°C | 13.5°C | 11.5°C | 18.5°C | 7.8°C | 38 mm | 85% | 4 m/s | 6.1 |
| 1992 ❄️ | 13.6°C | 11.3°C | 9.1°C | 22.1°C | 5.3°C | 87 mm | 82% | 4.1 m/s | 5.4 |
| 1991 | 17.2°C | 15.2°C | 13.1°C | 23.6°C | 8.2°C | 75 mm | 86% | 4.1 m/s | 6.3 |
| 1990 | 14.4°C | 12.5°C | 10.6°C | 17.2°C | 7.5°C | 182 mm | 83% | 4.9 m/s | 5.4 |
| 1989 🌧️ | 14.7°C | 12.9°C | 11.2°C | 19.2°C | 7.5°C | 245 mm | 88% | 4.5 m/s | 5.1 |
| 1988 | 14.9°C | 13.2°C | 11.4°C | 22.3°C | 6.7°C | 93 mm | 88% | 4 m/s | 5 |
| 1987 | 14.3°C | 12.5°C | 10.6°C | 22.8°C | 6.0°C | 57 mm | 88% | 4.4 m/s | 5.7 |
| 1986 | 15.7°C | 13.7°C | 11.7°C | 22.6°C | 5.7°C | 24 mm | 83% | 4.2 m/s | 6.7 |
| 1985 | 15.4°C | 13.4°C | 11.5°C | 20.4°C | 5.0°C | 141 mm | 84% | 4.8 m/s | 6.3 |
| 1984 | 14.4°C | 12.5°C | 10.6°C | 17.6°C | 6.7°C | 206 mm | 86% | 4.7 m/s | 4.2 |
| 1983 | 14.5°C | 12.5°C | 10.6°C | 18.3°C | 6.2°C | 124 mm | 87% | 4.9 m/s | — |
| 1982 | 16.2°C | 14.0°C | 11.8°C | 20.3°C | 9.0°C | 74 mm | 85% | 3.4 m/s | — |
| 1981 | 15.7°C | 13.3°C | 10.9°C | 20.9°C | 6.7°C | 68 mm | 82% | 4.2 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 15.1°C with lows near 11.4°C (mean 13.3°C), based on 45 years of NASA POWER data.
May averages 104 mm of rainfall in Bay Shore, about average for rainfall. The wettest on record was 245 mm in 1989.
The hottest May reached 25.3°C in 2022. The coldest dipped to 3.4°C in 2020.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.8°C. Daytime highs moved from 15.2°C to 15.7°C and overnight lows from 11.1°C to 12.1°C over the same span.
May is one of the warmer months of the year in Bay Shore and about average for rainfall, so plan for around 15.1°C daytime highs and 11.4°C at night.
Not quite — May is the 7th coolest month in Bay Shore, averaging 13.3°C.
For May in Bay Shore, pack light layers you can adjust through the day, with typical highs of 15.1°C and lows of 11.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 86% — quite humid.
Average wind speed in May is 4.3 m/s. The windiest May on record averaged 5.4 m/s (1997).
The wettest May on record was 1989 with 245 mm. On average, May sees 104 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 Bay Shore 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.
