August is one of the warmer months of the year in Fresno, with average highs near 38°C and lows around 19.9°C (mean 29°C). It is one of the drier months, averaging 2 mm of rainfall and 28% relative humidity across the period.
August is one of the warmer months of the year in Fresno. Across 45 years of records, the warmest August in Fresno was 2022 — when the month averaged 31.3°C — while the coldest were 1989 and 1999 at 26.6°C. Typical August days reach 38°C with nights near 19.9°C. The long-term trend is warming, about 0.4°C per decade.
August is one of the drier months in Fresno, averaging 2 mm of rainfall. The wettest August on record was 2000 with 16 mm, while the driest were 2016, 2019 and 2021, among others at 0 mm.
Relative humidity in Fresno during August averages 28%. The most humid August was 1991 at 33%, and the least humid was 1986 at 21%.
August receives about 7.4 kWh/m²/day of solar energy in Fresno. The sunniest August was 1998 at 7.9 kWh/m²/day, and the cloudiest was 1984 at 6.6.
Average wind speed in Fresno during August is 2 m/s. The windiest Augusts were 2019, 2024 and 2025, among others at 2.2 m/s, while the calmest were 1983, 1986 and 2006 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 28.3°C | 28.6°C | 28.8°C | 29.2°C | 30.4°C | +2.1°C |
| Avg High | 37.3°C | 37.7°C | 37.8°C | 38.3°C | 39.1°C | +1.8°C |
| Avg Low | 19.3°C | 19.6°C | 19.7°C | 20.1°C | 21.6°C | +2.3°C |
| Avg Rain | 2 mm | 2 mm | 4 mm | 0 mm | 4 mm | +1 mm |
August temperatures in Fresno have risen by about 1.8°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 11.8°C (1987) to a record high of 47.7°C (1998).
Rainfall in August is one of the drier months, averaging 2 mm, with a wettest year of 16 mm.
A good time to visit Fresno
August is a good time to visit Fresno, with days averaging 38°C and nights around 19.9°C (mean 29°C, warmer than Fresno's yearly average) and low rainfall. May and October are marginally more temperate, but August still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 39.1°C | 30.0°C | 20.8°C | 42.6°C | 16.7°C | 6 mm | 27% | 2.2 m/s | 7.3 |
| 2024 | 38.5°C | 29.9°C | 21.3°C | 45.7°C | 15.9°C | 1 mm | 26% | 2.2 m/s | 7.3 |
| 2023 | 38.4°C | 29.9°C | 21.3°C | 43.8°C | 16.1°C | 12 mm | 31% | 1.8 m/s | 7.1 |
| 2022 🔥 | 40.0°C | 31.3°C | 22.6°C | 43.7°C | 19.6°C | 3 mm | 26% | 1.9 m/s | 7.1 |
| 2021 | 39.1°C | 30.1°C | 21.0°C | 43.1°C | 16.0°C | 0 mm | 25% | 2 m/s | 7.1 |
| 2020 | 39.5°C | 30.9°C | 22.3°C | 45.1°C | 15.0°C | 0 mm | 27% | 2 m/s | 6.9 |
| 2019 | 39.1°C | 30.2°C | 21.3°C | 44.0°C | 17.3°C | 0 mm | 26% | 2.2 m/s | 7.5 |
| 2018 | 38.2°C | 29.2°C | 20.2°C | 42.9°C | 15.1°C | 0 mm | 24% | 2.1 m/s | 7.3 |
| 2017 | 39.4°C | 30.9°C | 22.4°C | 45.4°C | 15.6°C | 1 mm | 28% | 2.2 m/s | 7 |
| 2016 | 38.5°C | 28.9°C | 19.3°C | 42.9°C | 16.7°C | 0 mm | 25% | 2.1 m/s | 7.6 |
| 2015 | 37.8°C | 29.0°C | 20.1°C | 42.1°C | 16.5°C | 0 mm | 31% | 2.2 m/s | 7.3 |
| 2014 | 37.7°C | 29.1°C | 20.5°C | 43.9°C | 16.1°C | 0 mm | 30% | 1.9 m/s | 7.2 |
| 2013 | 37.2°C | 28.3°C | 19.4°C | 42.6°C | 15.5°C | 1 mm | 31% | 2.1 m/s | 7.5 |
| 2012 | 40.3°C | 30.7°C | 21.2°C | 45.7°C | 15.2°C | 1 mm | 23% | 2.1 m/s | 7.3 |
| 2011 | 38.0°C | 28.5°C | 18.9°C | 41.3°C | 15.3°C | 0 mm | 28% | 2 m/s | 7.7 |
| 2010 | 36.4°C | 27.0°C | 17.6°C | 46.3°C | 12.9°C | 0 mm | 30% | 2 m/s | 7.7 |
| 2009 | 37.4°C | 28.4°C | 19.4°C | 42.5°C | 14.4°C | 2 mm | 29% | 1.9 m/s | 7.3 |
| 2008 | 39.0°C | 29.7°C | 20.5°C | 43.7°C | 16.0°C | 0 mm | 28% | 2.1 m/s | 7.6 |
| 2007 | 38.0°C | 29.0°C | 20.1°C | 43.0°C | 13.8°C | 2 mm | 29% | 2.1 m/s | 7.4 |
| 2006 | 37.1°C | 27.9°C | 18.8°C | 41.3°C | 15.2°C | 2 mm | 29% | 1.7 m/s | 7.7 |
| 2005 | 38.7°C | 29.9°C | 21.1°C | 44.1°C | 16.5°C | 2 mm | 27% | 1.9 m/s | 7.4 |
| 2004 | 37.8°C | 28.6°C | 19.4°C | 43.8°C | 15.1°C | 2 mm | 31% | 2.1 m/s | 7.5 |
| 2003 | 37.1°C | 28.6°C | 20.2°C | 40.9°C | 17.1°C | 6 mm | 32% | 2 m/s | 7.4 |
| 2002 | 37.4°C | 28.0°C | 18.6°C | 42.5°C | 14.0°C | 0 mm | 27% | 1.9 m/s | 7.5 |
| 2001 | 38.3°C | 28.8°C | 19.2°C | 44.5°C | 15.0°C | 5 mm | 31% | 2 m/s | 7.7 |
| 2000 🌧️ | 37.6°C | 28.7°C | 19.7°C | 44.8°C | 15.1°C | 16 mm | 29% | 1.9 m/s | 7.5 |
| 1999 | 35.4°C | 26.6°C | 17.9°C | 42.5°C | 14.7°C | 4 mm | 33% | 2 m/s | 7.4 |
| 1998 | 40.1°C | 30.6°C | 21.1°C | 47.7°C | 14.2°C | 1 mm | 24% | 1.9 m/s | 7.9 |
| 1997 | 37.7°C | 28.7°C | 19.8°C | 45.8°C | 16.1°C | 0 mm | 30% | 2.2 m/s | 7.6 |
| 1996 | 39.6°C | 30.3°C | 21.0°C | 45.4°C | 15.1°C | 1 mm | 23% | 1.9 m/s | 7.6 |
| 1995 | 38.3°C | 29.2°C | 20.0°C | 44.1°C | 15.6°C | 1 mm | 24% | 1.8 m/s | 7.8 |
| 1994 | 38.8°C | 29.3°C | 19.9°C | 44.0°C | 15.7°C | 1 mm | 24% | 1.9 m/s | 7.2 |
| 1993 | 36.2°C | 27.4°C | 18.7°C | 43.1°C | 14.1°C | 6 mm | 30% | 1.9 m/s | 7.3 |
| 1992 | 38.9°C | 29.8°C | 20.6°C | 43.7°C | 14.6°C | 1 mm | 26% | 2 m/s | 7.3 |
| 1991 | 35.5°C | 26.7°C | 17.9°C | 39.9°C | 13.3°C | 1 mm | 33% | 2.1 m/s | 7.3 |
| 1990 | 36.5°C | 27.8°C | 19.2°C | 45.6°C | 13.2°C | 1 mm | 31% | 2 m/s | 7.3 |
| 1989 ❄️ | 35.7°C | 26.6°C | 17.5°C | 40.0°C | 13.9°C | 3 mm | 28% | 1.8 m/s | 7.4 |
| 1988 | 37.7°C | 28.9°C | 20.0°C | 41.9°C | 14.1°C | 1 mm | 29% | 2 m/s | 7.2 |
| 1987 | 37.8°C | 28.3°C | 18.8°C | 43.2°C | 11.8°C | 1 mm | 26% | 1.9 m/s | 7.2 |
| 1986 | 38.5°C | 29.3°C | 20.0°C | 41.3°C | 16.5°C | 0 mm | 21% | 1.7 m/s | 7.1 |
| 1985 | 36.2°C | 27.3°C | 18.3°C | 41.0°C | 15.5°C | 0 mm | 25% | 1.9 m/s | 7.2 |
| 1984 | 37.7°C | 28.9°C | 20.0°C | 43.0°C | 15.3°C | 2 mm | 27% | 2 m/s | 6.6 |
| 1983 | 36.5°C | 28.5°C | 20.4°C | 43.6°C | 15.8°C | 10 mm | 31% | 1.7 m/s | — |
| 1982 | 37.1°C | 28.2°C | 19.4°C | 41.8°C | 15.3°C | 3 mm | 27% | 1.9 m/s | — |
| 1981 | 38.7°C | 28.9°C | 19.1°C | 45.2°C | 15.3°C | 0 mm | 24% | 1.9 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 38°C with lows near 19.9°C (mean 29°C), based on 45 years of NASA POWER data.
August averages 2 mm of rainfall in Fresno, one of the drier months. The wettest on record was 16 mm in 2000.
The hottest August reached 47.7°C in 1998. The coldest dipped to 11.8°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.8°C. Daytime highs moved from 37.2°C to 39°C and overnight lows from 19.4°C to 21.4°C over the same span.
August is one of the warmer months of the year in Fresno and one of the drier months, so plan for around 38°C daytime highs and 19.9°C at night.
Not quite — August is the 11th coolest month in Fresno, averaging 29°C.
For August in Fresno, pack light, breathable clothing and sun protection, with typical highs of 38°C and lows of 19.9°C.
Relative humidity in August averages 28% — relatively dry.
Average wind speed in August is 2 m/s. The windiest August on record averaged 2.2 m/s (1997).
The wettest August on record was 2000 with 16 mm. On average, August sees 2 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 Fresno 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.
