May is one of the warmer months of the year in Boca Raton, with average highs near 28.2°C and lows around 23.5°C (mean 25.9°C). It is about average for rainfall, averaging 120 mm of rainfall and 75% relative humidity across the period.
May is one of the warmer months of the year in Boca Raton. Across 45 years of records, the warmest May in Boca Raton was 2024 — when the month averaged 27.8°C — while the coldest was 1993 at 24.2°C. Typical May days reach 28.2°C with nights near 23.5°C. The long-term trend is warming, about 0.3°C per decade.
May is about average for rainfall in Boca Raton, averaging 120 mm of rainfall. The wettest May on record was 2018 with 307 mm, while the driest was 1992 at 25 mm.
Relative humidity in Boca Raton during May averages 75%. The most humid May was 2018 at 83%, and the least humid was 1989 at 69%.
May receives about 6.1 kWh/m²/day of solar energy in Boca Raton. The sunniest Mays were 2015, 2017 and 2024, among others at 6.7 kWh/m²/day, and the cloudiest was 2018 at 4.6.
Average wind speed in Boca Raton during May is 3.4 m/s. The windiest May was 2007 at 4.4 m/s, while the calmest were 2006 and 2023 at 2.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.3°C | 25.6°C | 25.9°C | 26.0°C | 26.7°C | +1.4°C |
| Avg High | 27.7°C | 27.9°C | 28.4°C | 28.3°C | 29.0°C | +1.3°C |
| Avg Low | 23.0°C | 23.4°C | 23.5°C | 23.8°C | 24.4°C | +1.4°C |
| Avg Rain | 130 mm | 111 mm | 110 mm | 130 mm | 122 mm | -7 mm |
May temperatures in Boca Raton have risen by about 1.6°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 15.1°C (1999) to a record high of 32.9°C (2024).
Rainfall in May is about average for rainfall, averaging 120 mm, with a wettest year of 307 mm.
A good time to visit Boca Raton
May is a good time to visit Boca Raton, with days averaging 28.2°C and nights around 23.5°C (mean 25.9°C, warmer than Boca Raton's yearly average) and higher rainfall. December and February 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 | 29.6°C | 27.3°C | 25.0°C | 32.3°C | 22.6°C | 103 mm | 78% | 3.1 m/s | 6.1 |
| 2024 🔥 | 30.3°C | 27.8°C | 25.3°C | 32.9°C | 22.9°C | 69 mm | 77% | 3.1 m/s | 6.7 |
| 2023 | 28.7°C | 26.2°C | 23.7°C | 30.6°C | 20.3°C | 134 mm | 75% | 2.8 m/s | 6.5 |
| 2022 | 28.7°C | 26.4°C | 24.2°C | 30.8°C | 21.5°C | 147 mm | 78% | 3.2 m/s | 6.3 |
| 2021 | 28.6°C | 26.5°C | 24.4°C | 30.4°C | 22.7°C | 58 mm | 73% | 3.9 m/s | 6.6 |
| 2020 | 28.2°C | 26.0°C | 23.7°C | 30.9°C | 19.3°C | 224 mm | 76% | 3.9 m/s | 5.9 |
| 2019 | 28.5°C | 26.4°C | 24.3°C | 30.6°C | 22.9°C | 113 mm | 78% | 3.4 m/s | 6.4 |
| 2018 🌧️ | 26.9°C | 25.4°C | 23.8°C | 28.8°C | 22.0°C | 307 mm | 83% | 4.1 m/s | 4.6 |
| 2017 | 29.4°C | 26.7°C | 24.0°C | 32.8°C | 18.2°C | 70 mm | 74% | 3.5 m/s | 6.7 |
| 2016 | 27.8°C | 25.7°C | 23.5°C | 29.7°C | 17.7°C | 180 mm | 75% | 3.1 m/s | 6.3 |
| 2015 | 28.1°C | 26.1°C | 24.0°C | 30.4°C | 20.9°C | 79 mm | 74% | 3.5 m/s | 6.7 |
| 2014 | 28.5°C | 26.2°C | 23.9°C | 31.5°C | 21.6°C | 69 mm | 72% | 3.8 m/s | 6.3 |
| 2013 | 27.7°C | 25.3°C | 23.0°C | 30.2°C | 18.5°C | 201 mm | 75% | 3.6 m/s | 6 |
| 2012 | 28.2°C | 26.0°C | 23.8°C | 30.9°C | 22.4°C | 156 mm | 78% | 3.3 m/s | 5.5 |
| 2011 | 29.5°C | 26.6°C | 23.8°C | 32.1°C | 20.9°C | 42 mm | 69% | 3.5 m/s | 6.3 |
| 2010 | 28.3°C | 26.1°C | 23.9°C | 30.0°C | 22.7°C | 84 mm | 79% | 3.2 m/s | 6.3 |
| 2009 | 28.1°C | 26.0°C | 23.8°C | 31.6°C | 21.8°C | 244 mm | 78% | 3.3 m/s | 5.4 |
| 2008 | 29.0°C | 26.2°C | 23.4°C | 32.1°C | 20.2°C | 56 mm | 72% | 3.6 m/s | 6.4 |
| 2007 | 28.2°C | 25.7°C | 23.3°C | 30.9°C | 19.7°C | 72 mm | 70% | 4.4 m/s | 6 |
| 2006 | 28.8°C | 25.9°C | 23.0°C | 30.8°C | 20.5°C | 81 mm | 72% | 2.8 m/s | 6.2 |
| 2005 | 28.1°C | 25.6°C | 23.1°C | 31.6°C | 20.2°C | 128 mm | 75% | 3.3 m/s | 5.9 |
| 2004 | 28.2°C | 25.8°C | 23.4°C | 32.7°C | 20.7°C | 43 mm | 71% | 4.1 m/s | 6.6 |
| 2003 | 29.3°C | 26.9°C | 24.6°C | 31.4°C | 21.7°C | 205 mm | 78% | 3.2 m/s | 5.9 |
| 2002 | 28.6°C | 26.3°C | 24.1°C | 30.6°C | 21.9°C | 92 mm | 75% | 3.8 m/s | 6.4 |
| 2001 | 27.5°C | 25.2°C | 22.8°C | 30.9°C | 20.5°C | 132 mm | 74% | 4 m/s | 5.9 |
| 2000 | 28.4°C | 25.8°C | 23.3°C | 31.4°C | 20.3°C | 43 mm | 72% | 3.3 m/s | 6.7 |
| 1999 | 28.1°C | 25.5°C | 22.8°C | 31.6°C | 15.1°C | 84 mm | 73% | 3 m/s | 6.4 |
| 1998 | 28.7°C | 26.2°C | 23.6°C | 30.8°C | 20.0°C | 80 mm | 75% | 3 m/s | 6.4 |
| 1997 | 28.1°C | 26.0°C | 24.0°C | 30.6°C | 21.0°C | 109 mm | 77% | 3.2 m/s | 6 |
| 1996 | 27.6°C | 25.6°C | 23.7°C | 29.5°C | 22.3°C | 208 mm | 80% | 3.3 m/s | 5.8 |
| 1995 | 28.8°C | 26.6°C | 24.4°C | 30.3°C | 22.7°C | 68 mm | 77% | 2.9 m/s | 6.3 |
| 1994 | 27.8°C | 25.7°C | 23.7°C | 29.8°C | 20.2°C | 112 mm | 77% | 2.9 m/s | 6.5 |
| 1993 ❄️ | 26.4°C | 24.2°C | 22.1°C | 28.6°C | 19.5°C | 105 mm | 77% | 3.8 m/s | 5.8 |
| 1992 | 27.2°C | 24.3°C | 21.4°C | 29.5°C | 15.4°C | 25 mm | 70% | 3.4 m/s | 6.6 |
| 1991 | 27.9°C | 26.2°C | 24.5°C | 29.3°C | 22.9°C | 149 mm | 78% | 3.8 m/s | 5.5 |
| 1990 | 28.2°C | 26.0°C | 23.7°C | 29.8°C | 21.3°C | 175 mm | 77% | 3.5 m/s | 5.6 |
| 1989 | 29.5°C | 26.7°C | 23.9°C | 31.4°C | 19.7°C | 52 mm | 69% | 3.2 m/s | 6.5 |
| 1988 | 27.5°C | 25.1°C | 22.7°C | 30.8°C | 18.5°C | 123 mm | 73% | 3.1 m/s | 5.7 |
| 1987 | 27.1°C | 25.1°C | 23.1°C | 28.2°C | 18.8°C | 121 mm | 75% | 3.7 m/s | 6.3 |
| 1986 | 27.0°C | 24.8°C | 22.6°C | 29.0°C | 20.3°C | 96 mm | 74% | 3.5 m/s | 6.1 |
| 1985 | 28.4°C | 25.7°C | 23.0°C | 31.0°C | 21.1°C | 95 mm | 72% | 2.9 m/s | 6.3 |
| 1984 | 27.0°C | 25.1°C | 23.2°C | 29.1°C | 20.2°C | 238 mm | 78% | 3.6 m/s | 5.4 |
| 1983 | 26.9°C | 24.6°C | 22.4°C | 29.1°C | 19.8°C | 77 mm | 75% | 3.4 m/s | — |
| 1982 | 26.4°C | 24.5°C | 22.6°C | 28.7°C | 20.5°C | 235 mm | 76% | 3.9 m/s | — |
| 1981 | 29.1°C | 26.2°C | 23.2°C | 31.8°C | 21.0°C | 131 mm | 69% | 3.5 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 28.2°C with lows near 23.5°C (mean 25.9°C), based on 45 years of NASA POWER data.
May averages 120 mm of rainfall in Boca Raton, about average for rainfall. The wettest on record was 307 mm in 2018.
The hottest May reached 32.9°C in 2024. The coldest dipped to 15.1°C in 1999.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.6°C. Daytime highs moved from 27.6°C to 29.2°C and overnight lows from 22.9°C to 24.5°C over the same span.
May is one of the warmer months of the year in Boca Raton and about average for rainfall, so plan for around 28.2°C daytime highs and 23.5°C at night.
Not quite — May is the 7th coolest month in Boca Raton, averaging 25.9°C.
For May in Boca Raton, pack light layers you can adjust through the day, with typical highs of 28.2°C and lows of 23.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 75% — moderately humid.
Average wind speed in May is 3.4 m/s. The windiest May on record averaged 4.4 m/s (2007).
The wettest May on record was 2018 with 307 mm. On average, May sees 120 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 Boca Raton 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.
