August is one of the warmer months of the year in Jacksonville, with average highs near 32.4°C and lows around 23.3°C (mean 27.9°C). It is a relatively wet time of year, averaging 175 mm of rainfall and 81% relative humidity across the period.
August is one of the warmer months of the year in Jacksonville. Across 45 years of records, the warmest August in Jacksonville was 2023 — when the month averaged 29.9°C — while the coldest were 1992, 1994 and 2012 at 26.4°C. Typical August days reach 32.4°C with nights near 23.3°C. The long-term trend is warming, about 0.3°C per decade.
August is a relatively wet time of year in Jacksonville, averaging 175 mm of rainfall. The wettest August on record was 2008 with 335 mm, while the driest was 1993 at 82 mm.
Relative humidity in Jacksonville during August averages 81%. The most humid August was 2012 at 87%, and the least humid was 1993 at 72%.
August receives about 5.6 kWh/m²/day of solar energy in Jacksonville. The sunniest August was 2011 at 6.2 kWh/m²/day, and the cloudiest was 2008 at 4.9.
Average wind speed in Jacksonville during August is 0.5 m/s. The windiest Augusts were 1995, 2008 and 2024 at 0.7 m/s, while the calmest was 2022 at 0.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.5°C | 27.6°C | 27.7°C | 28.2°C | 28.5°C | +1°C |
| Avg High | 32.0°C | 32.1°C | 32.2°C | 32.9°C | 32.9°C | +0.9°C |
| Avg Low | 23.0°C | 23.1°C | 23.1°C | 23.6°C | 24.1°C | +1.1°C |
| Avg Rain | 175 mm | 157 mm | 177 mm | 169 mm | 208 mm | +33 mm |
August temperatures in Jacksonville have risen by about 1.3°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 17.9°C (2009) to a record high of 40.3°C (1999).
Rainfall in August is a relatively wet time of year, averaging 175 mm, with a wettest year of 335 mm.
A quieter season to visit Jacksonville
If your dates are flexible, the more temperate months of October and April tend to be the most comfortable for visiting Jacksonville. That said, August — with days averaging 32.4°C and nights around 23.3°C (mean 27.9°C) and higher rainfall (175 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 | 32.5°C | 28.3°C | 24.1°C | 38.8°C | 21.0°C | 230 mm | 82% | 0.5 m/s | 5.4 |
| 2024 | 32.3°C | 28.2°C | 24.2°C | 36.7°C | 22.2°C | 306 mm | 84% | 0.7 m/s | 5.6 |
| 2023 🔥 | 35.1°C | 29.9°C | 24.8°C | 38.6°C | 22.8°C | 127 mm | 77% | 0.6 m/s | 6 |
| 2022 | 33.4°C | 28.6°C | 23.8°C | 36.8°C | 21.4°C | 160 mm | 79% | 0.4 m/s | 5.8 |
| 2021 | 31.5°C | 27.7°C | 23.9°C | 39.8°C | 22.7°C | 221 mm | 87% | 0.5 m/s | 5.1 |
| 2020 | 32.7°C | 28.2°C | 23.6°C | 36.4°C | 21.3°C | 203 mm | 82% | 0.5 m/s | 5.5 |
| 2019 | 33.2°C | 28.6°C | 23.9°C | 38.1°C | 22.0°C | 181 mm | 81% | 0.5 m/s | 5.6 |
| 2018 | 32.5°C | 27.8°C | 23.2°C | 34.6°C | 22.1°C | 159 mm | 82% | 0.5 m/s | 6 |
| 2017 | 32.2°C | 27.8°C | 23.5°C | 35.2°C | 20.0°C | 183 mm | 85% | 0.5 m/s | 5.6 |
| 2016 | 33.7°C | 28.9°C | 24.2°C | 38.7°C | 22.7°C | 126 mm | 76% | 0.6 m/s | 6 |
| 2015 | 32.2°C | 27.9°C | 23.6°C | 36.2°C | 22.4°C | 242 mm | 83% | 0.5 m/s | 5.4 |
| 2014 | 33.9°C | 28.7°C | 23.6°C | 37.5°C | 20.1°C | 117 mm | 76% | 0.6 m/s | 5.8 |
| 2013 | 32.1°C | 27.6°C | 23.2°C | 35.9°C | 20.8°C | 172 mm | 83% | 0.5 m/s | 5.8 |
| 2012 | 30.2°C | 26.4°C | 22.6°C | 33.9°C | 18.7°C | 243 mm | 87% | 0.5 m/s | 5.1 |
| 2011 | 35.0°C | 29.5°C | 24.0°C | 39.2°C | 19.8°C | 107 mm | 74% | 0.6 m/s | 6.2 |
| 2010 | 33.8°C | 29.1°C | 24.4°C | 38.2°C | 21.9°C | 158 mm | 78% | 0.6 m/s | 5.7 |
| 2009 | 31.3°C | 27.1°C | 23.0°C | 37.6°C | 17.9°C | 187 mm | 85% | 0.5 m/s | 5.5 |
| 2008 🌧️ | 30.6°C | 26.9°C | 23.2°C | 36.4°C | 20.8°C | 335 mm | 85% | 0.7 m/s | 4.9 |
| 2007 | 33.3°C | 28.5°C | 23.8°C | 36.5°C | 21.6°C | 132 mm | 80% | 0.5 m/s | 6 |
| 2006 | 34.6°C | 29.2°C | 23.8°C | 37.5°C | 22.1°C | 111 mm | 73% | 0.6 m/s | 6 |
| 2005 | 32.4°C | 28.2°C | 24.0°C | 36.2°C | 22.2°C | 150 mm | 83% | 0.5 m/s | 5.7 |
| 2004 | 31.2°C | 27.1°C | 23.0°C | 34.9°C | 21.5°C | 209 mm | 83% | 0.5 m/s | 5 |
| 2003 | 30.9°C | 27.0°C | 23.2°C | 33.8°C | 22.1°C | 155 mm | 86% | 0.5 m/s | 5.6 |
| 2002 | 31.5°C | 26.9°C | 22.4°C | 36.8°C | 19.0°C | 215 mm | 81% | 0.5 m/s | 5.5 |
| 2001 | 32.5°C | 27.6°C | 22.6°C | 35.9°C | 20.2°C | 131 mm | 80% | 0.5 m/s | 6.1 |
| 2000 | 33.5°C | 28.0°C | 22.4°C | 37.6°C | 20.5°C | 150 mm | 74% | 0.5 m/s | 6.1 |
| 1999 | 34.3°C | 29.1°C | 23.9°C | 40.3°C | 20.2°C | 140 mm | 74% | 0.6 m/s | 5.9 |
| 1998 | 31.6°C | 27.3°C | 23.0°C | 36.2°C | 20.4°C | 204 mm | 84% | 0.5 m/s | 5.5 |
| 1997 | 31.5°C | 27.1°C | 22.7°C | 35.1°C | 18.7°C | 114 mm | 80% | 0.6 m/s | 5.9 |
| 1996 | 31.8°C | 27.3°C | 22.7°C | 35.4°C | 21.1°C | 169 mm | 78% | 0.6 m/s | 5.5 |
| 1995 | 32.5°C | 28.1°C | 23.8°C | 38.9°C | 21.9°C | 282 mm | 81% | 0.7 m/s | 5.4 |
| 1994 | 30.4°C | 26.4°C | 22.4°C | 34.7°C | 20.3°C | 109 mm | 83% | 0.6 m/s | 5.8 |
| 1993 | 34.1°C | 28.7°C | 23.3°C | 38.4°C | 21.3°C | 82 mm | 72% | 0.6 m/s | 5.8 |
| 1992 ❄️ | 30.1°C | 26.4°C | 22.8°C | 33.3°C | 20.6°C | 218 mm | 86% | 0.5 m/s | 5.5 |
| 1991 | 30.6°C | 26.8°C | 23.0°C | 33.8°C | 18.6°C | 138 mm | 87% | 0.5 m/s | 5.6 |
| 1990 | 33.8°C | 28.7°C | 23.6°C | 38.3°C | 21.8°C | 119 mm | 75% | 0.5 m/s | 5.8 |
| 1989 | 32.0°C | 27.6°C | 23.1°C | 37.8°C | 19.8°C | 140 mm | 80% | 0.5 m/s | 5.5 |
| 1988 | 31.8°C | 27.7°C | 23.5°C | 35.2°C | 21.9°C | 191 mm | 81% | 0.5 m/s | 5.3 |
| 1987 | 34.0°C | 28.9°C | 23.7°C | 38.0°C | 21.0°C | 151 mm | 77% | 0.5 m/s | 5.7 |
| 1986 | 31.7°C | 27.3°C | 23.0°C | 38.1°C | 19.5°C | 206 mm | 82% | 0.5 m/s | 5.3 |
| 1985 | 30.6°C | 26.7°C | 22.9°C | 34.8°C | 20.9°C | 324 mm | 85% | 0.6 m/s | 5 |
| 1984 | 32.1°C | 27.0°C | 22.0°C | 34.8°C | 19.4°C | 90 mm | 77% | 0.5 m/s | 5.5 |
| 1983 | 32.8°C | 28.0°C | 23.2°C | 38.8°C | 18.8°C | 135 mm | 79% | 0.5 m/s | — |
| 1982 | 31.3°C | 27.0°C | 22.6°C | 35.4°C | 20.7°C | 125 mm | 82% | 0.5 m/s | — |
| 1981 | 31.6°C | 27.2°C | 22.8°C | 35.5°C | 20.2°C | 212 mm | 81% | 0.6 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 32.4°C with lows near 23.3°C (mean 27.9°C), based on 45 years of NASA POWER data.
August averages 175 mm of rainfall in Jacksonville, a relatively wet time of year. The wettest on record was 335 mm in 2008.
The hottest August reached 40.3°C in 1999. The coldest dipped to 17.9°C in 2009.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.3°C. Daytime highs moved from 31.7°C to 33°C and overnight lows from 22.7°C to 24.2°C over the same span.
August is one of the warmer months of the year in Jacksonville and a relatively wet time of year, so plan for around 32.4°C daytime highs and 23.3°C at night.
Not quite — August is the 11th coolest month in Jacksonville, averaging 27.9°C.
For August in Jacksonville, pack light, breathable clothing and sun protection, with typical highs of 32.4°C and lows of 23.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 81% — quite humid.
Average wind speed in August is 0.5 m/s. The windiest August on record averaged 0.7 m/s (1995).
The wettest August on record was 2008 with 335 mm. On average, August sees 175 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 Jacksonville 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.
