August is one of the warmer months of the year in Port Saint Lucie, with average highs near 30.8°C and lows around 24.8°C (mean 27.8°C). It is a relatively wet time of year, averaging 187 mm of rainfall and 82% relative humidity across the period.
August is one of the warmer months of the year in Port Saint Lucie. Across 45 years of records, the warmest August in Port Saint Lucie was 2025 — when the month averaged 29.2°C — while the coldest was 1994 at 26.7°C. Typical August days reach 30.8°C with nights near 24.8°C. The long-term trend is warming, about 0.3°C per decade.
August is a relatively wet time of year in Port Saint Lucie, averaging 187 mm of rainfall. The wettest August on record was 2008 with 390 mm, while the driest was 1987 at 67 mm.
Relative humidity in Port Saint Lucie during August averages 82%. The most humid August was 2008 at 86%, and the least humid was 1987 at 74%.
August receives about 5.7 kWh/m²/day of solar energy in Port Saint Lucie. The sunniest August was 2022 at 6.2 kWh/m²/day, and the cloudiest was 2008 at 5.
Average wind speed in Port Saint Lucie during August is 1.9 m/s. The windiest Augusts were 1981 and 2008 at 2.5 m/s, while the calmest was 1990 at 1.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.4°C | 27.5°C | 27.7°C | 28.0°C | 28.8°C | +1.4°C |
| Avg High | 30.5°C | 30.4°C | 30.7°C | 31.0°C | 32.0°C | +1.5°C |
| Avg Low | 24.3°C | 24.5°C | 24.8°C | 25.0°C | 25.6°C | +1.3°C |
| Avg Rain | 175 mm | 211 mm | 198 mm | 180 mm | 154 mm | -21 mm |
August temperatures in Port Saint Lucie have risen by about 1.6°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 21°C (1984) to a record high of 35.9°C (2006).
Rainfall in August is a relatively wet time of year, averaging 187 mm, with a wettest year of 390 mm.
A quieter season to visit Port Saint Lucie
If your dates are flexible, the more temperate months of November and April tend to be the most comfortable for visiting Port Saint Lucie. That said, August — with days averaging 30.8°C and nights around 24.8°C (mean 27.8°C) and higher rainfall (187 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 🔥 | 32.8°C | 29.2°C | 25.7°C | 35.1°C | 24.2°C | 161 mm | 79% | 1.8 m/s | 6 |
| 2024 | 31.7°C | 28.7°C | 25.7°C | 34.3°C | 24.4°C | 165 mm | 82% | 2.3 m/s | 5.3 |
| 2023 | 32.4°C | 29.1°C | 25.9°C | 34.5°C | 23.9°C | 153 mm | 81% | 2.1 m/s | 6.1 |
| 2022 | 32.7°C | 29.1°C | 25.5°C | 35.6°C | 23.1°C | 100 mm | 76% | 1.8 m/s | 6.2 |
| 2021 | 31.0°C | 28.1°C | 25.2°C | 33.3°C | 23.8°C | 172 mm | 84% | 1.9 m/s | 5.4 |
| 2020 | 31.3°C | 28.4°C | 25.5°C | 33.0°C | 24.1°C | 176 mm | 83% | 1.9 m/s | 5.8 |
| 2019 | 30.8°C | 27.9°C | 24.9°C | 32.6°C | 23.7°C | 270 mm | 85% | 1.9 m/s | 5.3 |
| 2018 | 30.5°C | 27.6°C | 24.6°C | 32.0°C | 23.5°C | 140 mm | 84% | 1.8 m/s | 6 |
| 2017 | 31.2°C | 28.1°C | 25.0°C | 32.9°C | 23.6°C | 133 mm | 83% | 2.1 m/s | 6 |
| 2016 | 30.5°C | 27.9°C | 25.3°C | 32.7°C | 24.3°C | 241 mm | 84% | 2.1 m/s | 5.5 |
| 2015 | 31.1°C | 28.1°C | 25.0°C | 32.9°C | 23.5°C | 171 mm | 82% | 1.6 m/s | 5.4 |
| 2014 | 31.3°C | 28.1°C | 24.9°C | 32.9°C | 23.6°C | 106 mm | 80% | 1.7 m/s | 6 |
| 2013 | 30.2°C | 27.4°C | 24.6°C | 31.7°C | 23.5°C | 109 mm | 84% | 1.9 m/s | 5.9 |
| 2012 | 31.4°C | 28.1°C | 24.9°C | 35.4°C | 23.1°C | 284 mm | 80% | 2.1 m/s | 5.2 |
| 2011 | 31.4°C | 28.2°C | 25.1°C | 33.9°C | 24.2°C | 187 mm | 82% | 2.1 m/s | 5.4 |
| 2010 | 31.7°C | 28.6°C | 25.5°C | 34.6°C | 24.1°C | 163 mm | 79% | 1.9 m/s | 5.5 |
| 2009 | 30.9°C | 28.0°C | 25.1°C | 32.0°C | 23.5°C | 155 mm | 83% | 1.8 m/s | 5.9 |
| 2008 🌧️ | 29.8°C | 27.1°C | 24.4°C | 31.8°C | 21.8°C | 390 mm | 86% | 2.5 m/s | 5 |
| 2007 | 31.4°C | 28.2°C | 25.0°C | 33.2°C | 23.7°C | 116 mm | 80% | 1.8 m/s | 6.1 |
| 2006 | 31.8°C | 28.3°C | 24.8°C | 35.9°C | 23.5°C | 183 mm | 78% | 1.9 m/s | 5.7 |
| 2005 | 31.3°C | 28.5°C | 25.7°C | 33.0°C | 23.9°C | 162 mm | 83% | 1.7 m/s | 6.1 |
| 2004 | 30.5°C | 27.8°C | 25.0°C | 32.2°C | 24.0°C | 242 mm | 85% | 1.8 m/s | 5.2 |
| 2003 | 30.0°C | 27.4°C | 24.8°C | 31.6°C | 23.3°C | 239 mm | 85% | 1.9 m/s | 5.1 |
| 2002 | 30.1°C | 27.2°C | 24.4°C | 32.1°C | 22.5°C | 220 mm | 84% | 1.9 m/s | 5.7 |
| 2001 | 30.4°C | 27.4°C | 24.4°C | 32.2°C | 21.6°C | 167 mm | 82% | 1.6 m/s | 5.9 |
| 2000 | 30.4°C | 27.1°C | 23.9°C | 32.1°C | 22.0°C | 104 mm | 81% | 2.1 m/s | 5.8 |
| 1999 | 30.8°C | 27.7°C | 24.6°C | 32.8°C | 23.3°C | 197 mm | 84% | 2 m/s | 5.5 |
| 1998 | 31.0°C | 28.2°C | 25.3°C | 33.3°C | 23.3°C | 246 mm | 83% | 1.8 m/s | 5.8 |
| 1997 | 30.5°C | 27.5°C | 24.6°C | 32.2°C | 22.5°C | 224 mm | 83% | 1.5 m/s | 5.6 |
| 1996 | 29.9°C | 27.0°C | 24.1°C | 31.5°C | 22.3°C | 140 mm | 82% | 1.8 m/s | 5.9 |
| 1995 | 30.4°C | 27.6°C | 24.8°C | 33.1°C | 23.5°C | 321 mm | 85% | 2.4 m/s | 5.6 |
| 1994 ❄️ | 29.4°C | 26.7°C | 24.0°C | 30.9°C | 22.2°C | 209 mm | 84% | 1.8 m/s | 5.5 |
| 1993 | 31.4°C | 27.9°C | 24.4°C | 34.4°C | 22.9°C | 146 mm | 78% | 2 m/s | 5.8 |
| 1992 | 29.8°C | 27.1°C | 24.4°C | 31.6°C | 22.8°C | 230 mm | 85% | 1.7 m/s | 5.4 |
| 1991 | 30.4°C | 27.5°C | 24.6°C | 32.0°C | 23.6°C | 184 mm | 84% | 1.7 m/s | 6 |
| 1990 | 30.2°C | 27.4°C | 24.5°C | 32.4°C | 23.4°C | 216 mm | 83% | 1.2 m/s | 5.9 |
| 1989 | 31.4°C | 28.0°C | 24.7°C | 35.7°C | 23.4°C | 180 mm | 78% | 1.7 m/s | 6 |
| 1988 | 29.7°C | 27.0°C | 24.2°C | 31.6°C | 23.2°C | 176 mm | 84% | 2 m/s | 5.2 |
| 1987 | 32.7°C | 28.7°C | 24.7°C | 34.9°C | 22.3°C | 67 mm | 74% | 2.1 m/s | 6 |
| 1986 | 30.0°C | 27.1°C | 24.1°C | 32.1°C | 23.0°C | 149 mm | 83% | 1.9 m/s | 5.6 |
| 1985 | 29.9°C | 27.2°C | 24.5°C | 31.4°C | 23.3°C | 182 mm | 83% | 2 m/s | 5.4 |
| 1984 | 30.4°C | 27.0°C | 23.6°C | 32.7°C | 21.0°C | 146 mm | 80% | 1.7 m/s | 5.7 |
| 1983 | 30.3°C | 27.4°C | 24.5°C | 32.5°C | 23.2°C | 217 mm | 83% | 1.7 m/s | — |
| 1982 | 29.9°C | 27.0°C | 24.1°C | 31.4°C | 23.0°C | 181 mm | 83% | 1.8 m/s | — |
| 1981 | 30.5°C | 27.5°C | 24.5°C | 34.4°C | 22.7°C | 278 mm | 82% | 2.5 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 30.8°C with lows near 24.8°C (mean 27.8°C), based on 45 years of NASA POWER data.
August averages 187 mm of rainfall in Port Saint Lucie, a relatively wet time of year. The wettest on record was 390 mm in 2008.
The hottest August reached 35.9°C in 2006. The coldest dipped to 21°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.6°C. Daytime highs moved from 30.2°C to 32.1°C and overnight lows from 24.2°C to 25.6°C over the same span.
August is one of the warmer months of the year in Port Saint Lucie and a relatively wet time of year, so plan for around 30.8°C daytime highs and 24.8°C at night.
Not quite — August is the 12th coolest month in Port Saint Lucie, averaging 27.8°C.
For August in Port Saint Lucie, pack light, breathable clothing and sun protection, with typical highs of 30.8°C and lows of 24.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 82% — quite humid.
Average wind speed in August is 1.9 m/s. The windiest August on record averaged 2.5 m/s (1981).
The wettest August on record was 2008 with 390 mm. On average, August sees 187 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 Port Saint Lucie behaves each August, 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 August specifically, along with year-by-year records and how the month has changed over the decades.
