May is one of the warmer months of the year in Forest Hills, with average highs near 16.9°C and lows around 11.3°C (mean 14.1°C). It is about average for rainfall, averaging 106 mm of rainfall and 83% relative humidity across the period.
May is one of the warmer months of the year in Forest Hills. Across 45 years of records, the warmest May in Forest Hills was 2012 — when the month averaged 16.4°C — while the coldest was 2003 at 12°C. Typical May days reach 16.9°C with nights near 11.3°C. The long-term trend is warming, about 0.3°C per decade.
May is about average for rainfall in Forest Hills, averaging 106 mm of rainfall. The wettest May on record was 1989 with 246 mm, while the driest was 2015 at 22 mm.
Relative humidity in Forest Hills during May averages 83%. The most humid Mays were 2004 and 2011 at 88%, and the least humid was 2023 at 77%.
May receives about 5.6 kWh/m²/day of solar energy in Forest Hills. 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 Forest Hills during May is 3.5 m/s. The windiest May was 1997 at 4.4 m/s, while the calmest was 1982 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.8°C | 13.6°C | 13.9°C | 14.8°C | 14.4°C | +0.6°C |
| Avg High | 16.7°C | 16.6°C | 16.8°C | 17.4°C | 17.1°C | +0.4°C |
| Avg Low | 10.9°C | 10.6°C | 11.1°C | 12.2°C | 11.6°C | +0.7°C |
| Avg Rain | 121 mm | 101 mm | 86 mm | 121 mm | 103 mm | -19 mm |
May temperatures in Forest Hills have risen by about 0.9°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 2.7°C (2020) to a record high of 27.8°C (2022).
Rainfall in May is about average for rainfall, averaging 106 mm, with a wettest year of 246 mm.
A good time to visit Forest Hills
May is a good time to visit Forest Hills, with days averaging 16.9°C and nights around 11.3°C (mean 14.1°C, warmer than Forest Hills'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 | 17.2°C | 14.7°C | 12.2°C | 22.4°C | 9.2°C | 193 mm | 86% | 3.6 m/s | 4.9 |
| 2024 | 17.9°C | 15.4°C | 13.0°C | 23.2°C | 9.1°C | 75 mm | 87% | 3.4 m/s | 5.5 |
| 2023 | 17.3°C | 14.4°C | 11.5°C | 22.4°C | 7.7°C | 41 mm | 77% | 3.3 m/s | 6.7 |
| 2022 | 17.3°C | 14.7°C | 12.0°C | 27.8°C | 6.6°C | 117 mm | 85% | 3.7 m/s | 5.5 |
| 2021 | 17.5°C | 14.4°C | 11.3°C | 25.2°C | 5.0°C | 139 mm | 80% | 3.5 m/s | 6 |
| 2020 | 15.3°C | 12.5°C | 9.6°C | 21.8°C | 2.7°C | 50 mm | 82% | 3.9 m/s | 6.1 |
| 2019 | 16.9°C | 14.4°C | 11.9°C | 23.3°C | 6.8°C | 198 mm | 86% | 3.7 m/s | 5.3 |
| 2018 | 17.9°C | 15.3°C | 12.6°C | 23.3°C | 6.3°C | 145 mm | 87% | 3.1 m/s | 5.1 |
| 2017 | 16.1°C | 13.7°C | 11.4°C | 23.8°C | 7.2°C | 209 mm | 84% | 3.8 m/s | 5.4 |
| 2016 | 16.4°C | 13.8°C | 11.3°C | 23.5°C | 5.9°C | 143 mm | 85% | 3.4 m/s | 5 |
| 2015 | 18.2°C | 15.4°C | 12.6°C | 22.4°C | 7.3°C | 22 mm | 84% | 3.4 m/s | 6.3 |
| 2014 | 17.2°C | 14.5°C | 11.7°C | 22.8°C | 8.0°C | 92 mm | 84% | 3.3 m/s | 5.6 |
| 2013 | 16.7°C | 14.0°C | 11.2°C | 24.5°C | 6.0°C | 108 mm | 85% | 3.7 m/s | 5.7 |
| 2012 🔥 | 18.7°C | 16.4°C | 14.1°C | 26.4°C | 9.5°C | 120 mm | 86% | 3.2 m/s | 5.2 |
| 2011 | 17.8°C | 15.4°C | 12.9°C | 26.8°C | 7.8°C | 98 mm | 88% | 3.4 m/s | 5.4 |
| 2010 | 18.1°C | 15.1°C | 12.2°C | 25.5°C | 5.5°C | 74 mm | 83% | 3.5 m/s | 6.1 |
| 2009 | 16.9°C | 14.3°C | 11.8°C | 22.4°C | 7.8°C | 112 mm | 85% | 3.5 m/s | 5.1 |
| 2008 | 16.3°C | 13.3°C | 10.4°C | 21.4°C | 6.8°C | 107 mm | 81% | 4.1 m/s | 5.7 |
| 2007 | 18.0°C | 14.8°C | 11.6°C | 25.9°C | 6.7°C | 47 mm | 81% | 3.2 m/s | 6.7 |
| 2006 | 17.2°C | 14.3°C | 11.5°C | 23.7°C | 7.5°C | 88 mm | 81% | 3.3 m/s | 5.7 |
| 2005 | 15.5°C | 12.8°C | 10.0°C | 19.8°C | 6.6°C | 46 mm | 81% | 3.6 m/s | 5.9 |
| 2004 | 18.3°C | 15.4°C | 12.5°C | 23.2°C | 6.2°C | 93 mm | 88% | 3.3 m/s | 5.5 |
| 2003 ❄️ | 14.4°C | 12.0°C | 9.7°C | 20.6°C | 6.7°C | 105 mm | 87% | 3.1 m/s | 4.4 |
| 2002 | 16.8°C | 13.6°C | 10.4°C | 22.5°C | 5.8°C | 104 mm | 78% | 3.9 m/s | 6.3 |
| 2001 | 17.4°C | 14.5°C | 11.6°C | 24.2°C | 7.0°C | 59 mm | 80% | 3.4 m/s | 5.8 |
| 2000 | 17.1°C | 14.4°C | 11.7°C | 23.6°C | 5.6°C | 101 mm | 84% | 3.5 m/s | 5.4 |
| 1999 | 17.4°C | 14.4°C | 11.5°C | 25.5°C | 6.8°C | 78 mm | 80% | 3.3 m/s | 5.8 |
| 1998 | 17.2°C | 14.4°C | 11.6°C | 25.1°C | 6.2°C | 188 mm | 87% | 3.6 m/s | 5.3 |
| 1997 | 15.6°C | 12.6°C | 9.6°C | 21.5°C | 5.3°C | 90 mm | 80% | 4.4 m/s | 6.1 |
| 1996 | 15.5°C | 12.6°C | 9.7°C | 23.2°C | 4.8°C | 74 mm | 83% | 3.4 m/s | 5.5 |
| 1995 | 16.2°C | 13.2°C | 10.2°C | 22.5°C | 5.3°C | 72 mm | 81% | 3.3 m/s | 5.4 |
| 1994 | 16.3°C | 13.1°C | 9.9°C | 22.7°C | 6.3°C | 97 mm | 81% | 4 m/s | 6 |
| 1993 | 17.2°C | 14.2°C | 11.2°C | 21.7°C | 8.0°C | 41 mm | 83% | 3.2 m/s | 6.1 |
| 1992 | 15.4°C | 12.2°C | 9.1°C | 24.8°C | 4.8°C | 94 mm | 80% | 3.4 m/s | 5.4 |
| 1991 | 19.1°C | 16.0°C | 13.0°C | 25.4°C | 7.4°C | 79 mm | 84% | 3.3 m/s | 6.3 |
| 1990 | 15.7°C | 13.0°C | 10.3°C | 18.9°C | 7.1°C | 199 mm | 82% | 4.1 m/s | 5.4 |
| 1989 🌧️ | 16.2°C | 13.6°C | 11.0°C | 22.0°C | 6.3°C | 246 mm | 87% | 3.8 m/s | 5.1 |
| 1988 | 16.5°C | 13.9°C | 11.3°C | 24.5°C | 5.8°C | 121 mm | 86% | 3.3 m/s | 5 |
| 1987 | 16.0°C | 13.2°C | 10.5°C | 25.4°C | 5.4°C | 55 mm | 86% | 3.5 m/s | 5.7 |
| 1986 | 17.6°C | 14.6°C | 11.5°C | 24.9°C | 4.1°C | 30 mm | 82% | 3.4 m/s | 6.7 |
| 1985 | 17.7°C | 14.6°C | 11.5°C | 23.0°C | 4.5°C | 131 mm | 80% | 3.9 m/s | 6.3 |
| 1984 | 15.6°C | 12.9°C | 10.2°C | 19.9°C | 5.5°C | 225 mm | 85% | 3.8 m/s | 4.2 |
| 1983 | 15.7°C | 12.9°C | 10.0°C | 20.3°C | 4.9°C | 123 mm | 86% | 3.9 m/s | — |
| 1982 | 17.6°C | 14.6°C | 11.5°C | 21.3°C | 8.1°C | 75 mm | 83% | 2.9 m/s | — |
| 1981 | 17.3°C | 13.9°C | 10.5°C | 23.1°C | 5.3°C | 86 mm | 80% | 3.5 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 11.3°C (mean 14.1°C), based on 45 years of NASA POWER data.
May averages 106 mm of rainfall in Forest Hills, about average for rainfall. The wettest on record was 246 mm in 1989.
The hottest May reached 27.8°C in 2022. The coldest dipped to 2.7°C in 2020.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.9°C. Daytime highs moved from 16.8°C to 17.4°C and overnight lows from 10.7°C to 12°C over the same span.
May is one of the warmer months of the year in Forest Hills and about average for rainfall, so plan for around 16.9°C daytime highs and 11.3°C at night.
Not quite — May is the 7th coolest month in Forest Hills, averaging 14.1°C.
For May in Forest Hills, pack light layers you can adjust through the day, with typical highs of 16.9°C and lows of 11.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 83% — quite humid.
Average wind speed in May is 3.5 m/s. The windiest May on record averaged 4.4 m/s (1997).
The wettest May on record was 1989 with 246 mm. On average, May sees 106 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 Forest Hills 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.
