August is one of the warmer months of the year in Irvine, with average highs near 29.2°C and lows around 18.6°C (mean 23.9°C). It is one of the drier months, averaging 6 mm of rainfall and 58% relative humidity across the period.
August is one of the warmer months of the year in Irvine. Across 45 years of records, the warmest August in Irvine was 2022 — when the month averaged 25.5°C — while the coldest was 2010 at 21.8°C. Typical August days reach 29.2°C with nights near 18.6°C. The long-term August temperature trend is broadly flat.
August is one of the drier months in Irvine, averaging 6 mm of rainfall. The wettest August on record was 2023 with 61 mm, while the driest were 2002, 2009 and 2019, among others at 0 mm.
Relative humidity in Irvine during August averages 58%. The most humid Augusts were 1988 and 1993 at 63%, and the least humid was 1981 at 49%.
August receives about 6.9 kWh/m²/day of solar energy in Irvine. The sunniest Augusts were 2010, 2019 and 2024, among others at 7.3 kWh/m²/day, and the cloudiest was 1984 at 6.2.
Average wind speed in Irvine during August is 2.1 m/s. The windiest August was 2022 at 2.3 m/s, while the calmest were 1982 and 1983 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.9°C | 24.0°C | 23.6°C | 23.6°C | 24.4°C | +0.5°C |
| Avg High | 29.3°C | 29.4°C | 28.8°C | 28.9°C | 29.7°C | +0.4°C |
| Avg Low | 18.4°C | 18.7°C | 18.4°C | 18.3°C | 19.2°C | +0.8°C |
| Avg Rain | 9 mm | 4 mm | 4 mm | 3 mm | 12 mm | +3 mm |
August temperatures in Irvine have stayed relatively stable across the record.
August has ranged from a record low of 12.7°C (2010) to a record high of 36.9°C (1985).
Rainfall in August is one of the drier months, averaging 6 mm, with a wettest year of 61 mm.
One of the best times to visit Irvine
August is one of the best times to visit Irvine. Expect days averaging 29.2°C and nights around 18.6°C (mean 23.9°C) — warmer than Irvine's yearly average — with low rainfall (6 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 29.7°C | 24.1°C | 18.6°C | 33.5°C | 15.5°C | 3 mm | 55% | 2.1 m/s | 7 |
| 2024 | 29.6°C | 24.2°C | 18.8°C | 33.7°C | 15.6°C | 1 mm | 57% | 2.2 m/s | 7.3 |
| 2023 🌧️ | 29.1°C | 24.0°C | 19.0°C | 33.3°C | 16.3°C | 61 mm | 61% | 2.1 m/s | 6.8 |
| 2022 🔥 | 30.6°C | 25.5°C | 20.3°C | 34.9°C | 17.8°C | 3 mm | 56% | 2.3 m/s | 7 |
| 2021 | 29.0°C | 23.9°C | 18.8°C | 33.2°C | 15.6°C | 4 mm | 59% | 2.1 m/s | 6.7 |
| 2020 | 30.2°C | 24.9°C | 19.6°C | 36.8°C | 15.0°C | 1 mm | 58% | 2.1 m/s | 7.1 |
| 2019 | 29.2°C | 23.6°C | 17.9°C | 33.8°C | 15.2°C | 0 mm | 54% | 2 m/s | 7.3 |
| 2018 | 30.0°C | 24.8°C | 19.6°C | 35.8°C | 15.5°C | 1 mm | 60% | 2.1 m/s | 7.2 |
| 2017 | 29.1°C | 23.9°C | 18.6°C | 35.5°C | 15.5°C | 5 mm | 59% | 2.1 m/s | 6.8 |
| 2016 | 28.9°C | 23.5°C | 18.0°C | 33.9°C | 14.7°C | 1 mm | 59% | 2.2 m/s | 7.2 |
| 2015 | 29.4°C | 24.3°C | 19.1°C | 34.7°C | 15.6°C | 1 mm | 61% | 2.1 m/s | 7 |
| 2014 | 28.9°C | 23.7°C | 18.5°C | 32.9°C | 15.4°C | 11 mm | 61% | 2 m/s | 7.1 |
| 2013 | 28.0°C | 22.8°C | 17.7°C | 31.3°C | 13.1°C | 6 mm | 58% | 2 m/s | 6.9 |
| 2012 | 30.6°C | 25.4°C | 20.3°C | 33.8°C | 15.3°C | 7 mm | 55% | 2.1 m/s | 6.9 |
| 2011 | 28.0°C | 22.5°C | 17.0°C | 34.2°C | 14.1°C | 1 mm | 57% | 2 m/s | 7.1 |
| 2010 ❄️ | 27.2°C | 21.8°C | 16.5°C | 34.0°C | 12.7°C | 1 mm | 57% | 2 m/s | 7.3 |
| 2009 | 29.0°C | 23.5°C | 18.0°C | 35.0°C | 14.6°C | 0 mm | 56% | 2 m/s | 7.1 |
| 2008 | 29.3°C | 24.0°C | 18.6°C | 32.3°C | 15.6°C | 3 mm | 59% | 2.1 m/s | 7 |
| 2007 | 29.6°C | 24.4°C | 19.2°C | 34.1°C | 15.5°C | 7 mm | 59% | 2.1 m/s | 7.1 |
| 2006 | 28.4°C | 23.2°C | 18.0°C | 32.3°C | 14.5°C | 0 mm | 59% | 2.1 m/s | 7.3 |
| 2005 | 28.6°C | 23.6°C | 18.6°C | 33.1°C | 15.9°C | 4 mm | 62% | 2 m/s | 6.8 |
| 2004 | 27.8°C | 22.8°C | 17.7°C | 32.7°C | 14.3°C | 3 mm | 62% | 2.1 m/s | 7 |
| 2003 | 30.1°C | 24.8°C | 19.4°C | 33.6°C | 16.9°C | 8 mm | 58% | 2.1 m/s | 7.2 |
| 2002 | 27.5°C | 22.2°C | 16.9°C | 32.5°C | 15.0°C | 0 mm | 62% | 2.1 m/s | 6.9 |
| 2001 | 28.7°C | 23.4°C | 18.1°C | 32.6°C | 15.8°C | 1 mm | 59% | 2.1 m/s | 7 |
| 2000 | 29.0°C | 24.1°C | 19.2°C | 32.6°C | 16.1°C | 17 mm | 60% | 2.1 m/s | 6.8 |
| 1999 | 28.4°C | 23.0°C | 17.7°C | 32.7°C | 14.5°C | 3 mm | 57% | 2.1 m/s | 7.1 |
| 1998 | 30.5°C | 25.3°C | 20.2°C | 35.1°C | 16.5°C | 8 mm | 59% | 1.9 m/s | 6.9 |
| 1997 | 29.8°C | 24.6°C | 19.4°C | 35.9°C | 16.1°C | 1 mm | 61% | 2.2 m/s | 7 |
| 1996 | 30.7°C | 25.0°C | 19.3°C | 34.4°C | 14.2°C | 1 mm | 57% | 2.1 m/s | 7.2 |
| 1995 | 29.8°C | 24.5°C | 19.1°C | 32.9°C | 16.2°C | 2 mm | 55% | 2.1 m/s | 6.8 |
| 1994 | 30.5°C | 25.1°C | 19.7°C | 34.4°C | 16.1°C | 6 mm | 57% | 2.1 m/s | 6.7 |
| 1993 | 27.6°C | 22.5°C | 17.4°C | 32.3°C | 15.2°C | 1 mm | 63% | 2.1 m/s | 6.6 |
| 1992 | 30.2°C | 25.0°C | 19.9°C | 33.4°C | 15.4°C | 10 mm | 60% | 2.1 m/s | 6.7 |
| 1991 | 27.5°C | 22.2°C | 17.0°C | 32.2°C | 13.2°C | 3 mm | 63% | 2 m/s | 6.5 |
| 1990 | 28.7°C | 23.2°C | 17.6°C | 33.1°C | 13.9°C | 5 mm | 62% | 2.2 m/s | 6.6 |
| 1989 | 27.5°C | 22.2°C | 16.8°C | 30.6°C | 14.2°C | 2 mm | 63% | 2.2 m/s | 6.9 |
| 1988 | 28.2°C | 22.9°C | 17.5°C | 31.4°C | 14.2°C | 9 mm | 63% | 2.1 m/s | 6.6 |
| 1987 | 28.2°C | 22.8°C | 17.4°C | 32.6°C | 14.0°C | 3 mm | 60% | 2.2 m/s | 6.7 |
| 1986 | 30.3°C | 24.7°C | 19.2°C | 33.8°C | 16.1°C | 3 mm | 50% | 1.9 m/s | 7 |
| 1985 | 29.5°C | 23.7°C | 17.8°C | 36.9°C | 14.4°C | 0 mm | 52% | 2 m/s | 6.9 |
| 1984 | 30.3°C | 25.0°C | 19.8°C | 33.3°C | 17.2°C | 14 mm | 60% | 2 m/s | 6.2 |
| 1983 | 29.6°C | 24.7°C | 19.7°C | 34.5°C | 15.3°C | 42 mm | 63% | 1.8 m/s | — |
| 1982 | 29.6°C | 24.3°C | 18.9°C | 33.3°C | 15.0°C | 7 mm | 53% | 1.8 m/s | — |
| 1981 | 30.6°C | 24.8°C | 18.9°C | 35.7°C | 15.1°C | 2 mm | 49% | 2 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 29.2°C with lows near 18.6°C (mean 23.9°C), based on 45 years of NASA POWER data.
August averages 6 mm of rainfall in Irvine, one of the drier months. The wettest on record was 61 mm in 2023.
The hottest August reached 36.9°C in 1985. The coldest dipped to 12.7°C in 2010.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have fallen by about 0.2°C — but days and nights have moved in opposite directions. Overnight lows rose from 19°C to 19.1°C while daytime highs eased from 29.9°C to 29.6°C, narrowing the gap between day and night.
August is one of the warmer months of the year in Irvine and one of the drier months, so plan for around 29.2°C daytime highs and 18.6°C at night.
Not quite — August is the 12th coolest month in Irvine, averaging 23.9°C.
For August in Irvine, pack light layers you can adjust through the day, with typical highs of 29.2°C and lows of 18.6°C.
Relative humidity in August averages 58% — moderately humid.
Average wind speed in August is 2.1 m/s. The windiest August on record averaged 2.3 m/s (2022).
The wettest August on record was 2023 with 61 mm. On average, August sees 6 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 Irvine 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.
