August is one of the cooler months of the year in Griffith, with average highs near 16.3°C and lows around 4.5°C (mean 10.4°C). It is about average for rainfall, averaging 36 mm of rainfall and 73% relative humidity across the period.
August is one of the cooler months of the year in Griffith. Across 45 years of records, the warmest August in Griffith was 1982 — when the month averaged 13.3°C — while the coldest was 1989 at 7.9°C. Typical August days reach 16.3°C with nights near 4.5°C. The long-term trend is warming, about 0.2°C per decade.
August is about average for rainfall in Griffith, averaging 36 mm of rainfall. The wettest August on record was 1983 with 74 mm, while the driest was 1982 at 3 mm.
Relative humidity in Griffith during August averages 73%. The most humid August was 1989 at 85%, and the least humid was 1982 at 56%.
August receives about 3.6 kWh/m²/day of solar energy in Griffith. The sunniest August was 2002 at 4.1 kWh/m²/day, and the cloudiest were 2015 and 2022 at 3.1.
Average wind speed in Griffith during August is 2.5 m/s. The windiest Augusts were 1984 and 1991 at 3.1 m/s, while the calmest was 2006 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.2°C | 10.0°C | 10.6°C | 10.1°C | 11.4°C | +1.2°C |
| Avg High | 15.7°C | 15.9°C | 16.9°C | 15.9°C | 17.4°C | +1.7°C |
| Avg Low | 4.6°C | 4.2°C | 4.2°C | 4.4°C | 5.5°C | +0.9°C |
| Avg Rain | 47 mm | 38 mm | 32 mm | 33 mm | 28 mm | -19 mm |
August temperatures in Griffith have risen by about 1.3°C between 1981–1985 and 2021–2025.
August has ranged from a record low of -2.1°C (2014) to a record high of 28.1°C (2007).
Rainfall in August is about average for rainfall, averaging 36 mm, with a wettest year of 74 mm.
A quieter season to visit Griffith
If your dates are flexible, the more temperate months of March and November tend to be the most comfortable for visiting Griffith. That said, August — with days averaging 16.3°C and nights around 4.5°C (mean 10.4°C) and moderate rainfall (36 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 18.0°C | 11.5°C | 5.1°C | 25.8°C | 0.9°C | 14 mm | 70% | 2.5 m/s | 3.8 |
| 2024 | 19.2°C | 12.9°C | 6.6°C | 26.2°C | 0.0°C | 27 mm | 70% | 2.1 m/s | 3.5 |
| 2023 | 18.9°C | 12.3°C | 5.8°C | 24.6°C | 1.2°C | 20 mm | 69% | 2 m/s | 3.8 |
| 2022 | 16.1°C | 11.0°C | 5.9°C | 23.1°C | 1.4°C | 51 mm | 78% | 2.7 m/s | 3.1 |
| 2021 | 17.2°C | 11.2°C | 5.2°C | 25.3°C | 1.1°C | 13 mm | 72% | 2.4 m/s | 3.7 |
| 2020 | 14.9°C | 9.6°C | 4.4°C | 22.8°C | -0.5°C | 40 mm | 77% | 2.6 m/s | 3.5 |
| 2019 | 16.0°C | 9.8°C | 3.6°C | 24.5°C | 0.1°C | 6 mm | 68% | 2.5 m/s | 3.9 |
| 2018 | 16.6°C | 10.5°C | 4.3°C | 21.8°C | 0.1°C | 15 mm | 61% | 2.9 m/s | 3.6 |
| 2017 | 16.1°C | 10.0°C | 4.0°C | 22.0°C | -1.1°C | 27 mm | 67% | 2.7 m/s | 3.8 |
| 2016 | 15.8°C | 10.2°C | 4.7°C | 21.2°C | 0.5°C | 51 mm | 77% | 2.2 m/s | 3.4 |
| 2015 | 14.4°C | 9.4°C | 4.4°C | 22.4°C | -0.6°C | 55 mm | 80% | 2.2 m/s | 3.1 |
| 2014 | 16.3°C | 10.0°C | 3.6°C | 21.2°C | -2.1°C | 16 mm | 75% | 2.1 m/s | 4 |
| 2013 | 16.6°C | 10.9°C | 5.2°C | 24.0°C | 2.2°C | 28 mm | 75% | 2.7 m/s | 3.5 |
| 2012 | 15.3°C | 9.6°C | 3.9°C | 22.6°C | 0.4°C | 31 mm | 73% | 2.6 m/s | 3.6 |
| 2011 | 18.1°C | 12.0°C | 5.9°C | 25.0°C | 2.1°C | 58 mm | 73% | 2.1 m/s | 3.7 |
| 2010 | 13.8°C | 9.0°C | 4.2°C | 18.4°C | 0.0°C | 46 mm | 79% | 2.9 m/s | 3.2 |
| 2009 | 18.2°C | 11.8°C | 5.3°C | 25.2°C | -0.2°C | 12 mm | 66% | 2.7 m/s | 3.6 |
| 2008 | 14.7°C | 9.0°C | 3.4°C | 19.4°C | -0.3°C | 24 mm | 72% | 2.6 m/s | 3.5 |
| 2007 | 18.7°C | 11.9°C | 5.1°C | 28.1°C | 0.6°C | 11 mm | 69% | 2.6 m/s | 3.9 |
| 2006 | 18.1°C | 11.0°C | 4.0°C | 23.8°C | 0.9°C | 8 mm | 66% | 1.8 m/s | 4 |
| 2005 | 16.6°C | 10.2°C | 3.8°C | 22.2°C | -0.1°C | 49 mm | 72% | 2.6 m/s | 3.8 |
| 2004 | 16.7°C | 10.7°C | 4.6°C | 26.8°C | 0.0°C | 43 mm | 69% | 2.5 m/s | 3.4 |
| 2003 | 15.6°C | 9.6°C | 3.6°C | 21.1°C | -1.2°C | 70 mm | 74% | 2.7 m/s | 3.4 |
| 2002 | 18.5°C | 11.2°C | 3.8°C | 25.6°C | -0.4°C | 9 mm | 62% | 2.4 m/s | 4.1 |
| 2001 | 17.0°C | 10.7°C | 4.3°C | 25.0°C | 0.3°C | 29 mm | 66% | 3 m/s | 3.7 |
| 2000 | 15.1°C | 9.6°C | 4.1°C | 19.4°C | -0.5°C | 65 mm | 79% | 2.2 m/s | 3.3 |
| 1999 | 16.7°C | 10.8°C | 5.0°C | 23.4°C | 0.1°C | 53 mm | 77% | 2.5 m/s | 3.7 |
| 1998 | 17.2°C | 11.3°C | 5.4°C | 21.2°C | 1.2°C | 42 mm | 76% | 2.2 m/s | 3.5 |
| 1997 | 16.1°C | 9.7°C | 3.2°C | 22.3°C | -1.2°C | 42 mm | 69% | 2.4 m/s | 3.6 |
| 1996 | 15.1°C | 9.7°C | 4.3°C | 20.9°C | -0.7°C | 40 mm | 77% | 2.6 m/s | 3.4 |
| 1995 | 17.6°C | 11.3°C | 4.9°C | 26.9°C | -0.1°C | 11 mm | 75% | 2.2 m/s | 4 |
| 1994 | 16.1°C | 9.2°C | 2.3°C | 24.5°C | -1.6°C | 5 mm | 66% | 2.2 m/s | 4 |
| 1993 | 17.3°C | 11.0°C | 4.7°C | 24.5°C | 0.3°C | 19 mm | 72% | 2.4 m/s | 3.9 |
| 1992 | 14.5°C | 9.0°C | 3.5°C | 18.8°C | -0.8°C | 72 mm | 75% | 2.8 m/s | 3.5 |
| 1991 | 14.7°C | 9.4°C | 4.0°C | 21.0°C | -0.6°C | 33 mm | 76% | 3.1 m/s | 3.5 |
| 1990 | 13.4°C | 8.9°C | 4.3°C | 18.4°C | -1.1°C | 60 mm | 83% | 3 m/s | 3.5 |
| 1989 ❄️ | 12.5°C | 7.9°C | 3.4°C | 16.4°C | -1.0°C | 60 mm | 85% | 2.3 m/s | 3.5 |
| 1988 | 16.1°C | 10.5°C | 4.9°C | 22.6°C | 1.5°C | 24 mm | 78% | 2.5 m/s | 3.7 |
| 1987 | 15.7°C | 10.7°C | 5.6°C | 19.1°C | 1.1°C | 50 mm | 79% | 2.3 m/s | 3.3 |
| 1986 | 15.3°C | 9.6°C | 3.8°C | 20.8°C | 0.2°C | 62 mm | 75% | 2.6 m/s | 3.6 |
| 1985 | 15.1°C | 9.5°C | 4.0°C | 19.4°C | -0.6°C | 68 mm | 76% | 2.5 m/s | 3.5 |
| 1984 | 15.7°C | 10.5°C | 5.2°C | 22.1°C | 2.7°C | 48 mm | 76% | 3.1 m/s | 3.6 |
| 1983 🌧️ | 15.7°C | 10.3°C | 4.9°C | 19.6°C | 0.0°C | 74 mm | 81% | 2.5 m/s | — |
| 1982 🔥 | 20.9°C | 13.3°C | 5.6°C | 26.9°C | 0.7°C | 3 mm | 56% | 1.9 m/s | — |
| 1981 | 14.3°C | 9.1°C | 3.9°C | 18.6°C | 0.0°C | 34 mm | 79% | 3 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 16.3°C with lows near 4.5°C (mean 10.4°C), based on 45 years of NASA POWER data.
August averages 36 mm of rainfall in Griffith, about average for rainfall. The wettest on record was 74 mm in 1983.
The hottest August reached 28.1°C in 2007. The coldest dipped to -2.1°C in 2014.
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 16.3°C to 17.9°C and overnight lows from 4.7°C to 5.7°C over the same span.
August is one of the cooler months of the year in Griffith and about average for rainfall, so plan for around 16.3°C daytime highs and 4.5°C at night.
Not quite — August is the 3rd coolest month in Griffith, averaging 10.4°C.
For August in Griffith, pack warm layers and a jacket for chilly mornings, with typical highs of 16.3°C and lows of 4.5°C.
Relative humidity in August averages 73% — moderately humid.
Average wind speed in August is 2.5 m/s. The windiest August on record averaged 3.1 m/s (1984).
The wettest August on record was 1983 with 74 mm. On average, August sees 36 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 Griffith 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.
