July is one of the warmer months of the year in Irvine, with average highs near 28°C and lows around 17.5°C (mean 22.8°C). It is one of the drier months, averaging 4 mm of rainfall and 61% relative humidity across the period.
July is one of the warmer months of the year in Irvine. Across 45 years of records, the warmest July in Irvine was 2006 — when the month averaged 26.2°C — while the coldest were 1993 and 2010 at 20.3°C. Typical July days reach 28°C with nights near 17.5°C. The long-term July temperature trend is broadly flat.
July is one of the drier months in Irvine, averaging 4 mm of rainfall. The wettest July on record was 2015 with 26 mm, while the driest were 1994, 2009 and 2020, among others at 0 mm.
Relative humidity in Irvine during July averages 61%. The most humid July was 1993 at 72%, and the least humid was 1981 at 49%.
July receives about 7.3 kWh/m²/day of solar energy in Irvine. The sunniest July was 2016 at 8 kWh/m²/day, and the cloudiest was 1988 at 6.1.
Average wind speed in Irvine during July is 2.2 m/s. The windiest July was 2006 at 2.4 m/s, while the calmest were 1983, 1998 and 2023 at 1.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.1°C | 22.2°C | 23.1°C | 22.7°C | 22.8°C | -0.3°C |
| Avg High | 28.7°C | 27.3°C | 28.3°C | 27.8°C | 28.0°C | -0.7°C |
| Avg Low | 17.5°C | 17.1°C | 17.8°C | 17.5°C | 17.6°C | +0.1°C |
| Avg Rain | 5 mm | 4 mm | 3 mm | 5 mm | 2 mm | -3 mm |
July temperatures in Irvine have fallen by about 0.7°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 12.7°C (1982) to a record high of 37.9°C (2006).
Rainfall in July is one of the drier months, averaging 4 mm, with a wettest year of 26 mm.
One of the best times to visit Irvine
July is one of the best times to visit Irvine. Expect days averaging 28°C and nights around 17.5°C (mean 22.8°C) — warmer than Irvine's yearly average — with low rainfall (4 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 | 26.3°C | 21.0°C | 15.8°C | 30.2°C | 14.4°C | 1 mm | 65% | 2.2 m/s | 7.7 |
| 2024 | 28.7°C | 23.5°C | 18.4°C | 31.6°C | 15.9°C | 1 mm | 58% | 2.2 m/s | 7.5 |
| 2023 | 28.5°C | 23.3°C | 18.1°C | 32.4°C | 13.4°C | 0 mm | 61% | 1.9 m/s | 7.4 |
| 2022 | 28.0°C | 22.8°C | 17.7°C | 31.3°C | 15.1°C | 2 mm | 59% | 2.3 m/s | 7.6 |
| 2021 | 29.1°C | 23.9°C | 18.6°C | 32.3°C | 15.7°C | 6 mm | 54% | 2.2 m/s | 7.4 |
| 2020 | 27.6°C | 22.2°C | 16.7°C | 32.8°C | 13.8°C | 0 mm | 61% | 2.1 m/s | 7.9 |
| 2019 | 27.3°C | 22.1°C | 16.8°C | 33.0°C | 14.1°C | 1 mm | 62% | 2 m/s | 7.6 |
| 2018 | 30.6°C | 25.1°C | 19.7°C | 37.4°C | 14.5°C | 2 mm | 56% | 2.3 m/s | 7.4 |
| 2017 | 29.0°C | 23.7°C | 18.4°C | 33.6°C | 14.0°C | 1 mm | 59% | 2.1 m/s | 7.4 |
| 2016 | 29.1°C | 23.6°C | 18.1°C | 34.8°C | 14.1°C | 2 mm | 56% | 2.3 m/s | 8 |
| 2015 🌧️ | 27.2°C | 22.4°C | 17.6°C | 30.6°C | 14.5°C | 26 mm | 68% | 2.2 m/s | 7 |
| 2014 | 28.8°C | 23.7°C | 18.5°C | 33.2°C | 16.1°C | 3 mm | 60% | 2.3 m/s | 7.4 |
| 2013 | 27.5°C | 22.5°C | 17.5°C | 31.5°C | 14.2°C | 4 mm | 60% | 2.3 m/s | 6.5 |
| 2012 | 26.9°C | 21.6°C | 16.2°C | 30.9°C | 13.1°C | 6 mm | 57% | 2.2 m/s | 7.3 |
| 2011 | 26.8°C | 21.8°C | 16.7°C | 30.3°C | 14.0°C | 4 mm | 63% | 2.2 m/s | 7.6 |
| 2010 | 25.0°C | 20.3°C | 15.6°C | 32.3°C | 13.1°C | 2 mm | 66% | 2.2 m/s | 6.8 |
| 2009 | 29.0°C | 23.5°C | 18.1°C | 32.8°C | 13.9°C | 0 mm | 57% | 2.3 m/s | 7.9 |
| 2008 | 28.3°C | 22.9°C | 17.6°C | 30.8°C | 15.0°C | 3 mm | 61% | 2.2 m/s | 7.3 |
| 2007 | 28.3°C | 23.1°C | 17.8°C | 32.1°C | 15.3°C | 0 mm | 59% | 2.2 m/s | 7.4 |
| 2006 🔥 | 31.3°C | 26.2°C | 21.1°C | 37.9°C | 17.8°C | 8 mm | 59% | 2.4 m/s | 7.3 |
| 2005 | 28.2°C | 23.1°C | 18.1°C | 32.7°C | 14.1°C | 6 mm | 67% | 2.1 m/s | 7.3 |
| 2004 | 28.1°C | 22.7°C | 17.3°C | 31.6°C | 14.6°C | 1 mm | 61% | 2.2 m/s | 7.6 |
| 2003 | 28.6°C | 23.5°C | 18.3°C | 32.2°C | 14.5°C | 4 mm | 62% | 2.1 m/s | 6.9 |
| 2002 | 27.5°C | 22.3°C | 17.0°C | 32.3°C | 14.3°C | 0 mm | 62% | 2.2 m/s | 7.3 |
| 2001 | 26.6°C | 21.6°C | 16.5°C | 31.3°C | 13.9°C | 3 mm | 64% | 2.2 m/s | 7.5 |
| 2000 | 27.0°C | 21.8°C | 16.6°C | 32.6°C | 13.8°C | 3 mm | 63% | 2.1 m/s | 7.6 |
| 1999 | 27.0°C | 21.9°C | 16.9°C | 31.3°C | 13.4°C | 13 mm | 63% | 2.2 m/s | 7.5 |
| 1998 | 26.9°C | 22.3°C | 17.7°C | 31.5°C | 13.7°C | 2 mm | 68% | 1.9 m/s | 7.3 |
| 1997 | 27.0°C | 21.8°C | 16.7°C | 31.5°C | 14.5°C | 4 mm | 64% | 2.3 m/s | 7.4 |
| 1996 | 28.9°C | 23.6°C | 18.4°C | 32.4°C | 15.2°C | 2 mm | 59% | 2.2 m/s | 7.5 |
| 1995 | 28.0°C | 22.6°C | 17.2°C | 34.9°C | 14.1°C | 3 mm | 63% | 2 m/s | 7.3 |
| 1994 | 27.1°C | 22.0°C | 16.8°C | 31.2°C | 14.9°C | 0 mm | 64% | 2.2 m/s | 6.8 |
| 1993 ❄️ | 25.0°C | 20.3°C | 15.6°C | 30.7°C | 14.3°C | 0 mm | 72% | 2.2 m/s | 6.4 |
| 1992 | 28.2°C | 23.1°C | 18.0°C | 33.3°C | 13.9°C | 6 mm | 66% | 2.2 m/s | 6.5 |
| 1991 | 25.5°C | 20.5°C | 15.5°C | 30.1°C | 13.8°C | 8 mm | 69% | 2.1 m/s | 6.5 |
| 1990 | 29.2°C | 23.7°C | 18.2°C | 32.8°C | 14.8°C | 3 mm | 57% | 2.1 m/s | 7.6 |
| 1989 | 29.3°C | 23.5°C | 17.8°C | 34.1°C | 14.5°C | 1 mm | 55% | 2.1 m/s | 7.5 |
| 1988 | 29.2°C | 23.5°C | 17.9°C | 32.8°C | 14.5°C | 1 mm | 60% | 2.1 m/s | 6.1 |
| 1987 | 26.3°C | 20.7°C | 15.1°C | 32.4°C | 13.2°C | 2 mm | 63% | 2.3 m/s | 6.8 |
| 1986 | 27.6°C | 22.1°C | 16.6°C | 31.4°C | 13.9°C | 7 mm | 57% | 2.2 m/s | 7.3 |
| 1985 | 30.4°C | 24.7°C | 18.9°C | 36.0°C | 15.5°C | 7 mm | 52% | 2.2 m/s | 6.9 |
| 1984 | 30.4°C | 25.2°C | 19.9°C | 33.3°C | 17.6°C | 20 mm | 57% | 2.1 m/s | 6.6 |
| 1983 | 27.4°C | 21.9°C | 16.4°C | 31.9°C | 13.8°C | 0 mm | 59% | 1.9 m/s | — |
| 1982 | 27.7°C | 22.1°C | 16.5°C | 31.4°C | 12.7°C | 4 mm | 57% | 2 m/s | — |
| 1981 | 30.0°C | 24.0°C | 18.1°C | 32.5°C | 15.1°C | 0 mm | 49% | 2.1 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 28°C with lows near 17.5°C (mean 22.8°C), based on 45 years of NASA POWER data.
July averages 4 mm of rainfall in Irvine, one of the drier months. The wettest on record was 26 mm in 2015.
The hottest July reached 37.9°C in 2006. The coldest dipped to 12.7°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have fallen by about 0.7°C. Daytime highs moved from 29.2°C to 28.1°C and overnight lows from 18°C to 17.7°C over the same span.
July is one of the warmer months of the year in Irvine and one of the drier months, so plan for around 28°C daytime highs and 17.5°C at night.
Not quite — July is the 10th coolest month in Irvine, averaging 22.8°C.
For July in Irvine, pack light layers you can adjust through the day, with typical highs of 28°C and lows of 17.5°C.
Relative humidity in July averages 61% — moderately humid.
Average wind speed in July is 2.2 m/s. The windiest July on record averaged 2.4 m/s (2006).
The wettest July on record was 2015 with 26 mm. On average, July sees 4 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 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.
