July is one of the warmer months of the year in Stone Mountain, with average highs near 32.6°C and lows around 20.9°C (mean 26.8°C). It is a relatively wet time of year, averaging 121 mm of rainfall and 71% relative humidity across the period.
July is one of the warmer months of the year in Stone Mountain. Across 45 years of records, the warmest July in Stone Mountain was 1986 — when the month averaged 29.3°C — while the coldest was 1994 at 23.8°C. Typical July days reach 32.6°C with nights near 20.9°C. The long-term trend is warming, about 0.3°C per decade.
July is a relatively wet time of year in Stone Mountain, averaging 121 mm of rainfall. The wettest July on record was 2005 with 286 mm, while the driest was 1993 at 43 mm.
Relative humidity in Stone Mountain during July averages 71%. The most humid July was 1989 at 85%, and the least humid was 1986 at 54%.
July receives about 5.9 kWh/m²/day of solar energy in Stone Mountain. The sunniest Julys were 1993 and 2010 at 6.6 kWh/m²/day, and the cloudiest was 2013 at 5.
Average wind speed in Stone Mountain during July is 0.9 m/s. The windiest July was 1996 at 1.1 m/s, while the calmest were 2022, 2023 and 2024, among others at 0.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.3°C | 26.6°C | 26.4°C | 27.1°C | 27.6°C | +1.3°C |
| Avg High | 32.1°C | 32.3°C | 32.3°C | 32.8°C | 33.7°C | +1.6°C |
| Avg Low | 20.6°C | 20.9°C | 20.5°C | 21.3°C | 21.5°C | +0.9°C |
| Avg Rain | 127 mm | 116 mm | 130 mm | 113 mm | 123 mm | -5 mm |
July temperatures in Stone Mountain have risen by about 1.7°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 13.3°C (2014) to a record high of 41.6°C (2012).
Rainfall in July is a relatively wet time of year, averaging 121 mm, with a wettest year of 286 mm.
A good time to visit Stone Mountain
July is a good time to visit Stone Mountain, with days averaging 32.6°C and nights around 20.9°C (mean 26.8°C, warmer than Stone Mountain's yearly average) and higher rainfall. September and May are marginally more temperate, but July still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 34.6°C | 28.3°C | 22.1°C | 38.2°C | 19.2°C | 92 mm | 68% | 0.9 m/s | 6.5 |
| 2024 | 34.0°C | 28.1°C | 22.1°C | 38.9°C | 18.6°C | 177 mm | 68% | 0.8 m/s | 5.6 |
| 2023 | 33.5°C | 27.3°C | 21.0°C | 37.5°C | 17.5°C | 107 mm | 69% | 0.8 m/s | 6.3 |
| 2022 | 34.3°C | 28.0°C | 21.7°C | 37.2°C | 18.6°C | 146 mm | 69% | 0.8 m/s | 5.9 |
| 2021 | 31.8°C | 26.1°C | 20.4°C | 36.2°C | 15.4°C | 144 mm | 74% | 0.8 m/s | 5.8 |
| 2020 | 34.0°C | 27.8°C | 21.7°C | 38.1°C | 19.4°C | 69 mm | 68% | 0.8 m/s | 6.3 |
| 2019 | 33.5°C | 27.4°C | 21.2°C | 35.8°C | 16.3°C | 91 mm | 67% | 0.8 m/s | 6.2 |
| 2018 | 31.8°C | 26.4°C | 20.9°C | 35.7°C | 17.5°C | 139 mm | 75% | 0.8 m/s | 6.2 |
| 2017 | 32.1°C | 26.5°C | 21.0°C | 35.7°C | 15.8°C | 100 mm | 75% | 0.8 m/s | 6.5 |
| 2016 | 35.2°C | 28.8°C | 22.4°C | 38.2°C | 20.2°C | 71 mm | 64% | 0.8 m/s | 6.3 |
| 2015 | 32.8°C | 27.2°C | 21.5°C | 36.6°C | 19.3°C | 107 mm | 72% | 0.9 m/s | 6.3 |
| 2014 | 31.4°C | 25.3°C | 19.2°C | 35.1°C | 13.3°C | 85 mm | 70% | 0.9 m/s | 6.1 |
| 2013 | 28.6°C | 24.4°C | 20.2°C | 32.5°C | 15.1°C | 224 mm | 84% | 0.8 m/s | 5 |
| 2012 | 34.2°C | 28.2°C | 22.1°C | 41.6°C | 19.4°C | 126 mm | 68% | 0.8 m/s | 6.3 |
| 2011 | 34.3°C | 28.4°C | 22.5°C | 37.8°C | 18.6°C | 87 mm | 68% | 0.8 m/s | 6 |
| 2010 | 34.0°C | 27.9°C | 21.8°C | 39.1°C | 16.2°C | 103 mm | 69% | 0.8 m/s | 6.6 |
| 2009 | 31.1°C | 25.2°C | 19.3°C | 34.5°C | 14.1°C | 93 mm | 70% | 1 m/s | 6.1 |
| 2008 | 33.0°C | 26.5°C | 20.0°C | 36.6°C | 14.3°C | 125 mm | 65% | 0.8 m/s | 6.2 |
| 2007 | 31.4°C | 25.7°C | 19.9°C | 34.9°C | 17.2°C | 119 mm | 70% | 0.8 m/s | 5.2 |
| 2006 | 35.0°C | 28.1°C | 21.2°C | 38.1°C | 16.5°C | 55 mm | 60% | 0.8 m/s | 5.9 |
| 2005 🌧️ | 30.4°C | 25.9°C | 21.4°C | 35.3°C | 18.3°C | 286 mm | 81% | 0.9 m/s | 5.2 |
| 2004 | 31.8°C | 26.1°C | 20.5°C | 36.5°C | 16.9°C | 103 mm | 73% | 0.9 m/s | 6.2 |
| 2003 | 29.4°C | 24.8°C | 20.2°C | 32.5°C | 16.4°C | 219 mm | 82% | 0.9 m/s | 5.8 |
| 2002 | 34.1°C | 27.6°C | 21.2°C | 38.1°C | 19.3°C | 88 mm | 67% | 0.9 m/s | 6 |
| 2001 | 32.2°C | 26.1°C | 20.1°C | 34.9°C | 17.1°C | 130 mm | 70% | 0.9 m/s | 5.9 |
| 2000 | 34.9°C | 27.9°C | 20.9°C | 38.5°C | 16.8°C | 78 mm | 58% | 1 m/s | 6.2 |
| 1999 | 33.1°C | 26.8°C | 20.5°C | 39.8°C | 15.7°C | 96 mm | 72% | 0.8 m/s | 5.9 |
| 1998 | 33.4°C | 27.6°C | 21.9°C | 37.5°C | 19.7°C | 85 mm | 70% | 1 m/s | 5.9 |
| 1997 | 31.8°C | 26.1°C | 20.4°C | 35.5°C | 15.7°C | 133 mm | 74% | 0.9 m/s | 6.2 |
| 1996 | 33.0°C | 26.6°C | 20.3°C | 36.6°C | 15.3°C | 85 mm | 67% | 1.1 m/s | 5.6 |
| 1995 | 34.3°C | 27.8°C | 21.2°C | 38.0°C | 17.2°C | 45 mm | 63% | 0.9 m/s | 6.3 |
| 1994 ❄️ | 27.9°C | 23.8°C | 19.6°C | 30.9°C | 15.6°C | 238 mm | 85% | 1 m/s | 5.1 |
| 1993 | 36.0°C | 29.1°C | 22.2°C | 39.3°C | 17.2°C | 43 mm | 61% | 0.8 m/s | 6.6 |
| 1992 | 31.3°C | 26.2°C | 21.1°C | 36.5°C | 18.7°C | 142 mm | 75% | 1 m/s | 5.7 |
| 1991 | 29.8°C | 25.6°C | 21.3°C | 33.0°C | 19.7°C | 158 mm | 83% | 0.8 m/s | 5.7 |
| 1990 | 32.2°C | 26.4°C | 20.5°C | 38.1°C | 17.1°C | 131 mm | 68% | 0.9 m/s | 6.1 |
| 1989 | 28.4°C | 24.4°C | 20.4°C | 32.1°C | 17.9°C | 206 mm | 85% | 0.9 m/s | 5.4 |
| 1988 | 34.0°C | 27.3°C | 20.6°C | 39.8°C | 15.8°C | 100 mm | 61% | 1 m/s | 5.5 |
| 1987 | 32.9°C | 26.6°C | 20.3°C | 38.4°C | 15.6°C | 75 mm | 67% | 0.8 m/s | 6.3 |
| 1986 🔥 | 36.1°C | 29.3°C | 22.4°C | 40.7°C | 17.1°C | 66 mm | 54% | 1 m/s | 6.3 |
| 1985 | 30.8°C | 25.3°C | 19.8°C | 35.0°C | 15.7°C | 179 mm | 73% | 0.8 m/s | 5.1 |
| 1984 | 29.1°C | 24.2°C | 19.3°C | 34.3°C | 15.7°C | 264 mm | 80% | 0.9 m/s | 5.1 |
| 1983 | 32.7°C | 26.6°C | 20.5°C | 36.9°C | 15.4°C | 49 mm | 68% | 0.9 m/s | — |
| 1982 | 30.0°C | 25.3°C | 20.6°C | 33.4°C | 17.8°C | 136 mm | 80% | 0.8 m/s | — |
| 1981 | 34.8°C | 28.1°C | 21.3°C | 38.0°C | 17.2°C | 73 mm | 62% | 0.9 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 32.6°C with lows near 20.9°C (mean 26.8°C), based on 45 years of NASA POWER data.
July averages 121 mm of rainfall in Stone Mountain, a relatively wet time of year. The wettest on record was 286 mm in 2005.
The hottest July reached 41.6°C in 2012. The coldest dipped to 13.3°C in 2014.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.7°C. Daytime highs moved from 31.5°C to 33.6°C and overnight lows from 20.3°C to 21.5°C over the same span.
July is one of the warmer months of the year in Stone Mountain and a relatively wet time of year, so plan for around 32.6°C daytime highs and 20.9°C at night.
Not quite — July is the 12th coolest month in Stone Mountain, averaging 26.8°C.
For July in Stone Mountain, pack light, breathable clothing and sun protection, with typical highs of 32.6°C and lows of 20.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 71% — moderately humid.
Average wind speed in July is 0.9 m/s. The windiest July on record averaged 1.1 m/s (1996).
The wettest July on record was 2005 with 286 mm. On average, July sees 121 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 Stone Mountain behaves each July, 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 July specifically, along with year-by-year records and how the month has changed over the decades.
