May is one of the warmer months of the year in Irvine, with average highs near 13.1°C and lows around 6.1°C (mean 9.6°C). It is one of the drier months, averaging 76 mm of rainfall and 84% relative humidity across the period.
May is one of the warmer months of the year in Irvine. Across 45 years of records, the warmest May in Irvine was 2024 — when the month averaged 12.7°C — while the coldest was 1996 at 7.1°C. Typical May days reach 13.1°C with nights near 6.1°C. The long-term trend is warming, about 0.3°C per decade.
May is one of the drier months in Irvine, averaging 76 mm of rainfall. The wettest May on record was 1986 with 161 mm, while the driest was 1984 at 22 mm.
Relative humidity in Irvine during May averages 84%. The most humid May was 2003 at 88%, and the least humid was 1984 at 78%.
May receives about 4.8 kWh/m²/day of solar energy in Irvine. The sunniest May was 2025 at 5.9 kWh/m²/day, and the cloudiest were 1986 and 2003 at 4.
Average wind speed in Irvine during May is 3.6 m/s. The windiest May was 2011 at 5.2 m/s, while the calmest was 1990 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.1°C | 9.3°C | 9.8°C | 9.5°C | 10.6°C | +1.5°C |
| Avg High | 12.6°C | 12.9°C | 13.2°C | 12.9°C | 14.2°C | +1.6°C |
| Avg Low | 5.5°C | 5.8°C | 6.4°C | 6.0°C | 7.0°C | +1.5°C |
| Avg Rain | 75 mm | 67 mm | 82 mm | 80 mm | 73 mm | -2 mm |
May temperatures in Irvine have risen by about 1.7°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -1.6°C (1982) to a record high of 23.1°C (2012).
Rainfall in May is one of the drier months, averaging 76 mm, with a wettest year of 161 mm.
A good time to visit Irvine
May is a good time to visit Irvine, with days averaging 13.1°C and nights around 6.1°C (mean 9.6°C, warmer than Irvine's yearly average) and moderate rainfall. July and August are marginally more temperate, but May still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 15.7°C | 11.2°C | 6.6°C | 19.8°C | 1.3°C | 56 mm | 80% | 3.2 m/s | 5.9 |
| 2024 🔥 | 16.1°C | 12.7°C | 9.3°C | 21.0°C | 6.9°C | 102 mm | 87% | 2.8 m/s | 4.3 |
| 2023 | 14.8°C | 11.0°C | 7.3°C | 19.8°C | 4.7°C | 36 mm | 85% | 2.7 m/s | 5 |
| 2022 | 13.4°C | 10.6°C | 7.7°C | 17.5°C | 5.1°C | 93 mm | 86% | 4.1 m/s | 4.2 |
| 2021 | 11.4°C | 8.2°C | 4.9°C | 19.0°C | -0.9°C | 101 mm | 85% | 3.2 m/s | 4.6 |
| 2020 | 13.7°C | 9.9°C | 6.2°C | 19.9°C | -0.4°C | 52 mm | 81% | 3.4 m/s | 5.3 |
| 2019 | 12.7°C | 9.1°C | 5.6°C | 18.8°C | 0.7°C | 78 mm | 81% | 3 m/s | 4.9 |
| 2018 | 15.0°C | 11.0°C | 6.9°C | 22.0°C | 1.8°C | 40 mm | 84% | 3.4 m/s | 5 |
| 2017 | 14.9°C | 10.9°C | 6.9°C | 21.6°C | 2.5°C | 60 mm | 83% | 3.4 m/s | 5.2 |
| 2016 | 13.8°C | 10.1°C | 6.4°C | 19.3°C | 1.8°C | 65 mm | 84% | 3.7 m/s | 5.1 |
| 2015 | 10.6°C | 7.7°C | 4.9°C | 13.7°C | -0.6°C | 114 mm | 85% | 4.6 m/s | 4.5 |
| 2014 | 13.1°C | 10.1°C | 7.0°C | 18.6°C | 3.1°C | 95 mm | 86% | 3.2 m/s | 4.1 |
| 2013 | 11.7°C | 8.4°C | 5.0°C | 17.1°C | 1.4°C | 102 mm | 86% | 4.2 m/s | 4.4 |
| 2012 | 13.0°C | 9.2°C | 5.3°C | 23.1°C | -1.1°C | 71 mm | 83% | 3.1 m/s | 5.2 |
| 2011 | 12.1°C | 9.4°C | 6.6°C | 16.6°C | 2.2°C | 136 mm | 85% | 5.2 m/s | 4.3 |
| 2010 | 12.3°C | 8.7°C | 5.1°C | 19.9°C | 0.3°C | 39 mm | 82% | 2.8 m/s | 5.2 |
| 2009 | 12.7°C | 9.5°C | 6.3°C | 20.9°C | 2.0°C | 104 mm | 86% | 4.4 m/s | 4.6 |
| 2008 | 15.4°C | 11.4°C | 7.3°C | 19.8°C | 2.5°C | 32 mm | 82% | 3.3 m/s | 5.1 |
| 2007 | 12.5°C | 9.3°C | 6.1°C | 18.3°C | 2.6°C | 80 mm | 84% | 3.7 m/s | 5.1 |
| 2006 | 12.9°C | 9.4°C | 5.8°C | 19.7°C | 2.1°C | 104 mm | 84% | 4 m/s | 4.7 |
| 2005 | 11.9°C | 8.6°C | 5.4°C | 14.7°C | 0.4°C | 103 mm | 84% | 3.8 m/s | 5 |
| 2004 | 13.8°C | 10.4°C | 7.0°C | 18.2°C | 4.1°C | 50 mm | 84% | 2.8 m/s | 4.9 |
| 2003 | 11.9°C | 9.3°C | 6.8°C | 19.8°C | 3.5°C | 145 mm | 88% | 4.1 m/s | 4 |
| 2002 | 12.8°C | 9.7°C | 6.6°C | 17.8°C | 2.5°C | 109 mm | 86% | 4 m/s | 4.1 |
| 2001 | 14.8°C | 10.6°C | 6.5°C | 21.3°C | 1.3°C | 38 mm | 82% | 2.9 m/s | 5 |
| 2000 | 13.7°C | 9.8°C | 5.9°C | 19.7°C | 2.3°C | 58 mm | 83% | 3.3 m/s | 5.4 |
| 1999 | 13.6°C | 10.4°C | 7.2°C | 18.7°C | 3.5°C | 107 mm | 85% | 3.7 m/s | 4.5 |
| 1998 | 14.1°C | 10.5°C | 7.0°C | 21.2°C | 2.3°C | 61 mm | 86% | 3.5 m/s | 5 |
| 1997 | 13.0°C | 9.3°C | 5.6°C | 20.2°C | -1.0°C | 81 mm | 84% | 3.2 m/s | 4.9 |
| 1996 ❄️ | 10.4°C | 7.1°C | 3.7°C | 15.2°C | -1.1°C | 79 mm | 84% | 3.7 m/s | 4.5 |
| 1995 | 12.0°C | 8.7°C | 5.4°C | 17.5°C | -0.4°C | 67 mm | 84% | 3.7 m/s | 4.8 |
| 1994 | 12.3°C | 8.3°C | 4.4°C | 17.5°C | 0.3°C | 27 mm | 81% | 4.1 m/s | 5 |
| 1993 | 12.1°C | 8.7°C | 5.3°C | 17.2°C | 1.1°C | 115 mm | 85% | 4 m/s | 4.2 |
| 1992 | 14.2°C | 10.5°C | 6.7°C | 19.9°C | 1.5°C | 58 mm | 85% | 4.4 m/s | 5.3 |
| 1991 | 12.9°C | 9.2°C | 5.4°C | 17.3°C | 0.2°C | 27 mm | 84% | 3.3 m/s | 4.7 |
| 1990 | 14.5°C | 10.7°C | 6.9°C | 21.0°C | 2.8°C | 47 mm | 80% | 2.3 m/s | 5.1 |
| 1989 | 13.7°C | 9.9°C | 6.1°C | 20.0°C | 1.9°C | 40 mm | 83% | 3.5 m/s | 5.1 |
| 1988 | 13.6°C | 9.8°C | 6.0°C | 19.8°C | 2.3°C | 56 mm | 83% | 3.3 m/s | 4.8 |
| 1987 | 12.0°C | 8.4°C | 4.8°C | 16.5°C | 1.9°C | 65 mm | 83% | 3.6 m/s | 4.9 |
| 1986 🌧️ | 11.2°C | 8.6°C | 5.9°C | 16.3°C | 3.3°C | 161 mm | 88% | 5 m/s | 4 |
| 1985 | 12.5°C | 8.8°C | 5.2°C | 17.1°C | 0.4°C | 64 mm | 83% | 3.5 m/s | 4.3 |
| 1984 | 13.5°C | 9.3°C | 5.0°C | 19.4°C | 0.1°C | 22 mm | 78% | 2.6 m/s | 5.4 |
| 1983 | 11.4°C | 8.3°C | 5.3°C | 15.2°C | 3.0°C | 95 mm | 85% | 3.4 m/s | — |
| 1982 | 12.5°C | 9.0°C | 5.4°C | 19.0°C | -1.6°C | 74 mm | 82% | 3.7 m/s | — |
| 1981 | 13.0°C | 9.6°C | 6.2°C | 20.3°C | -1.1°C | 100 mm | 85% | 3.7 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 13.1°C with lows near 6.1°C (mean 9.6°C), based on 45 years of NASA POWER data.
May averages 76 mm of rainfall in Irvine, one of the drier months. The wettest on record was 161 mm in 1986.
The hottest May reached 23.1°C in 2012. The coldest dipped to -1.6°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.7°C. Daytime highs moved from 12.6°C to 14.3°C and overnight lows from 5.4°C to 7.2°C over the same span.
May is one of the warmer months of the year in Irvine and one of the drier months, so plan for around 13.1°C daytime highs and 6.1°C at night.
Not quite — May is the 8th coolest month in Irvine, averaging 9.6°C.
For May in Irvine, pack warm layers and a jacket for chilly mornings, with typical highs of 13.1°C and lows of 6.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 84% — quite humid.
Average wind speed in May is 3.6 m/s. The windiest May on record averaged 5.2 m/s (2011).
The wettest May on record was 1986 with 161 mm. On average, May sees 76 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 May, 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 May specifically, along with year-by-year records and how the month has changed over the decades.
