May is one of the warmer months of the year in Saint Augustine, with average highs near 27.4°C and lows around 21.5°C (mean 24.5°C). It is one of the drier months, averaging 84 mm of rainfall and 75% relative humidity across the period.
May is one of the warmer months of the year in Saint Augustine. Across 45 years of records, the warmest May in Saint Augustine was 2024 — when the month averaged 26.4°C — while the coldest was 2013 at 22.8°C. Typical May days reach 27.4°C with nights near 21.5°C. The long-term trend is warming, about 0.2°C per decade.
May is one of the drier months in Saint Augustine, averaging 84 mm of rainfall. The wettest May on record was 2009 with 423 mm, while the driest was 2000 at 18 mm.
Relative humidity in Saint Augustine during May averages 75%. The most humid May was 2018 at 84%, and the least humid was 1981 at 65%.
May receives about 6.4 kWh/m²/day of solar energy in Saint Augustine. The sunniest May was 2011 at 7 kWh/m²/day, and the cloudiest was 2018 at 5.4.
Average wind speed in Saint Augustine during May is 2.4 m/s. The windiest May was 2007 at 3 m/s, while the calmest were 2024 and 2025 at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.9°C | 24.5°C | 24.5°C | 24.6°C | 25.1°C | +1.2°C |
| Avg High | 26.9°C | 27.3°C | 27.5°C | 27.4°C | 28.2°C | +1.3°C |
| Avg Low | 20.9°C | 21.6°C | 21.5°C | 21.7°C | 22.0°C | +1.1°C |
| Avg Rain | 68 mm | 65 mm | 89 mm | 121 mm | 70 mm | +2 mm |
May temperatures in Saint Augustine have risen by about 1.4°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 11.7°C (1992) to a record high of 34.8°C (2025).
Rainfall in May is one of the drier months, averaging 84 mm, with a wettest year of 423 mm.
One of the best times to visit Saint Augustine
May is one of the best times to visit Saint Augustine. Expect days averaging 27.4°C and nights around 21.5°C (mean 24.5°C) — warmer than Saint Augustine's yearly average — with higher rainfall (84 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 30.0°C | 26.3°C | 22.6°C | 34.8°C | 19.9°C | 150 mm | 76% | 2 m/s | 6.3 |
| 2024 🔥 | 29.6°C | 26.4°C | 23.1°C | 33.8°C | 20.7°C | 49 mm | 76% | 2 m/s | 6.4 |
| 2023 | 26.9°C | 24.1°C | 21.3°C | 30.3°C | 16.9°C | 86 mm | 77% | 2.4 m/s | 6.3 |
| 2022 | 28.1°C | 25.3°C | 22.4°C | 32.0°C | 18.5°C | 65 mm | 79% | 2.2 m/s | 6.7 |
| 2021 | 27.4°C | 24.5°C | 21.6°C | 31.1°C | 17.8°C | 19 mm | 70% | 2.4 m/s | 6.8 |
| 2020 | 27.3°C | 24.2°C | 21.2°C | 31.3°C | 16.4°C | 51 mm | 74% | 2.4 m/s | 6.4 |
| 2019 | 29.0°C | 26.0°C | 22.9°C | 34.5°C | 20.9°C | 83 mm | 76% | 2.3 m/s | 6.7 |
| 2018 | 26.1°C | 24.0°C | 21.9°C | 29.0°C | 18.6°C | 230 mm | 84% | 2.3 m/s | 5.4 |
| 2017 | 28.6°C | 25.1°C | 21.5°C | 32.8°C | 14.7°C | 132 mm | 72% | 2.5 m/s | 6.8 |
| 2016 | 27.4°C | 24.4°C | 21.4°C | 30.9°C | 15.1°C | 164 mm | 74% | 2.2 m/s | 6.7 |
| 2015 | 27.3°C | 24.7°C | 22.1°C | 30.8°C | 17.1°C | 61 mm | 76% | 2.4 m/s | 6.8 |
| 2014 | 26.8°C | 24.0°C | 21.2°C | 31.8°C | 16.3°C | 118 mm | 79% | 2.1 m/s | 6.5 |
| 2013 ❄️ | 25.4°C | 22.8°C | 20.2°C | 28.5°C | 14.5°C | 176 mm | 78% | 2.6 m/s | 6.4 |
| 2012 | 27.6°C | 24.9°C | 22.2°C | 32.1°C | 20.4°C | 160 mm | 79% | 2.5 m/s | 6.2 |
| 2011 | 28.2°C | 24.7°C | 21.2°C | 32.9°C | 16.5°C | 22 mm | 72% | 2.3 m/s | 7 |
| 2010 | 27.9°C | 25.1°C | 22.3°C | 30.5°C | 19.5°C | 66 mm | 79% | 2.2 m/s | 6.7 |
| 2009 🌧️ | 27.0°C | 24.4°C | 21.8°C | 32.7°C | 19.1°C | 423 mm | 82% | 2.3 m/s | 5.6 |
| 2008 | 27.5°C | 24.4°C | 21.3°C | 30.2°C | 17.5°C | 24 mm | 72% | 2.5 m/s | 6.6 |
| 2007 | 25.6°C | 23.2°C | 20.9°C | 28.8°C | 17.5°C | 29 mm | 73% | 3 m/s | 6.3 |
| 2006 | 28.5°C | 24.7°C | 20.9°C | 33.5°C | 16.6°C | 43 mm | 69% | 2.2 m/s | 6.6 |
| 2005 | 26.0°C | 23.1°C | 20.1°C | 29.5°C | 16.6°C | 98 mm | 78% | 2.1 m/s | 6.1 |
| 2004 | 27.9°C | 24.7°C | 21.6°C | 33.6°C | 16.6°C | 55 mm | 74% | 2.3 m/s | 6.8 |
| 2003 | 28.5°C | 25.5°C | 22.6°C | 31.6°C | 20.0°C | 112 mm | 78% | 2.1 m/s | 6.3 |
| 2002 | 27.5°C | 24.8°C | 22.1°C | 33.1°C | 19.0°C | 42 mm | 74% | 2.8 m/s | 6.5 |
| 2001 | 27.9°C | 24.6°C | 21.3°C | 33.0°C | 19.6°C | 46 mm | 71% | 2.4 m/s | 6.5 |
| 2000 | 28.8°C | 25.3°C | 21.9°C | 33.7°C | 18.8°C | 18 mm | 70% | 2.5 m/s | 6.9 |
| 1999 | 26.6°C | 23.8°C | 20.9°C | 31.6°C | 14.2°C | 53 mm | 74% | 2.5 m/s | 6.3 |
| 1998 | 28.1°C | 24.9°C | 21.8°C | 33.4°C | 18.4°C | 30 mm | 77% | 2.1 m/s | 6.6 |
| 1997 | 26.0°C | 23.5°C | 21.0°C | 29.7°C | 17.2°C | 100 mm | 78% | 2.4 m/s | 6.2 |
| 1996 | 28.3°C | 25.1°C | 21.9°C | 31.4°C | 16.9°C | 25 mm | 74% | 2.2 m/s | 6.4 |
| 1995 | 28.9°C | 25.8°C | 22.7°C | 33.2°C | 20.3°C | 43 mm | 73% | 2.4 m/s | 6.7 |
| 1994 | 27.4°C | 24.4°C | 21.4°C | 30.7°C | 17.1°C | 75 mm | 74% | 2.4 m/s | 6.4 |
| 1993 | 26.2°C | 23.4°C | 20.6°C | 30.6°C | 18.2°C | 43 mm | 74% | 2.3 m/s | 6.1 |
| 1992 | 26.2°C | 23.0°C | 19.8°C | 31.2°C | 11.7°C | 88 mm | 74% | 2.4 m/s | 6.2 |
| 1991 | 27.8°C | 25.7°C | 23.6°C | 31.5°C | 21.0°C | 160 mm | 83% | 2.3 m/s | 5.7 |
| 1990 | 27.8°C | 24.9°C | 22.1°C | 31.8°C | 19.0°C | 32 mm | 73% | 2.5 m/s | 6.5 |
| 1989 | 27.5°C | 24.3°C | 21.0°C | 32.1°C | 16.8°C | 44 mm | 71% | 2.4 m/s | 6.6 |
| 1988 | 26.3°C | 23.1°C | 19.9°C | 31.9°C | 15.7°C | 64 mm | 71% | 2.6 m/s | 6.1 |
| 1987 | 26.4°C | 23.9°C | 21.4°C | 29.3°C | 16.6°C | 65 mm | 78% | 2.5 m/s | 6.1 |
| 1986 | 27.5°C | 24.1°C | 20.7°C | 32.4°C | 18.1°C | 36 mm | 71% | 2.4 m/s | 6.4 |
| 1985 | 27.9°C | 24.6°C | 21.3°C | 33.1°C | 18.6°C | 56 mm | 70% | 2.3 m/s | 6.3 |
| 1984 | 26.0°C | 23.5°C | 21.0°C | 30.1°C | 17.2°C | 137 mm | 77% | 2.4 m/s | 6 |
| 1983 | 26.0°C | 23.3°C | 20.7°C | 30.0°C | 16.7°C | 46 mm | 79% | 2.2 m/s | — |
| 1982 | 26.3°C | 23.7°C | 21.1°C | 32.6°C | 17.9°C | 122 mm | 78% | 2.2 m/s | — |
| 1981 | 28.2°C | 24.4°C | 20.7°C | 32.8°C | 17.6°C | 44 mm | 65% | 2.4 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 27.4°C with lows near 21.5°C (mean 24.5°C), based on 45 years of NASA POWER data.
May averages 84 mm of rainfall in Saint Augustine, one of the drier months. The wettest on record was 423 mm in 2009.
The hottest May reached 34.8°C in 2025. The coldest dipped to 11.7°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.4°C. Daytime highs moved from 26.9°C to 28.4°C and overnight lows from 21°C to 22.2°C over the same span.
May is one of the warmer months of the year in Saint Augustine and one of the drier months, so plan for around 27.4°C daytime highs and 21.5°C at night.
Not quite — May is the 8th coolest month in Saint Augustine, averaging 24.5°C.
For May in Saint Augustine, pack light layers you can adjust through the day, with typical highs of 27.4°C and lows of 21.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 75% — quite humid.
Average wind speed in May is 2.4 m/s. The windiest May on record averaged 3 m/s (2007).
The wettest May on record was 2009 with 423 mm. On average, May sees 84 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 Saint Augustine 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.
