April is one of the cooler months of the year in Irvine, with average highs near 9.8°C and lows around 3.5°C (mean 6.7°C). It is one of the drier months, averaging 72 mm of rainfall and 87% relative humidity across the period.
April is one of the cooler months of the year in Irvine. Across 45 years of records, the warmest April in Irvine was 2011 — when the month averaged 9.3°C — while the coldest was 1986 at 4°C. Typical April days reach 9.8°C with nights near 3.5°C. The long-term trend is warming, about 0.3°C per decade.
April is one of the drier months in Irvine, averaging 72 mm of rainfall. The wettest April on record was 2024 with 143 mm, while the driest were 2020 and 2021 at 19 mm.
Relative humidity in Irvine during April averages 87%. The most humid Aprils were 1993 and 1996 at 90%, and the least humid was 2021 at 81%.
April receives about 3.6 kWh/m²/day of solar energy in Irvine. The sunniest April was 2021 at 4.6 kWh/m²/day, and the cloudiest was 1996 at 2.9.
Average wind speed in Irvine during April is 3.8 m/s. The windiest April was 1991 at 4.9 m/s, while the calmest was 2021 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 5.9°C | 6.4°C | 7.0°C | 6.7°C | 7.2°C | +1.3°C |
| Avg High | 9.2°C | 9.3°C | 10.1°C | 9.9°C | 10.7°C | +1.5°C |
| Avg Low | 2.7°C | 3.5°C | 3.9°C | 3.6°C | 3.7°C | +1°C |
| Avg Rain | 56 mm | 95 mm | 76 mm | 67 mm | 60 mm | +5 mm |
April temperatures in Irvine have risen by about 1°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -3.1°C (1981) to a record high of 19.4°C (1984).
Rainfall in April is one of the drier months, averaging 72 mm, with a wettest year of 143 mm.
A good time to visit Irvine
April is a good time to visit Irvine, with days averaging 9.8°C and nights around 3.5°C (mean 6.7°C, cooler than Irvine's yearly average) and moderate rainfall. July and August are marginally more temperate, but April still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 12.7°C | 8.7°C | 4.8°C | 19.2°C | 1.3°C | 50 mm | 84% | 3.4 m/s | 4.3 |
| 2024 🌧️ | 10.0°C | 7.1°C | 4.3°C | 13.5°C | 0.7°C | 143 mm | 88% | 4.3 m/s | 3.6 |
| 2023 | 10.6°C | 7.3°C | 4.0°C | 14.1°C | -0.2°C | 65 mm | 86% | 3.4 m/s | 3.8 |
| 2022 | 10.7°C | 7.2°C | 3.8°C | 14.6°C | -1.7°C | 66 mm | 85% | 3.6 m/s | 3.8 |
| 2021 | 9.0°C | 5.4°C | 1.7°C | 14.3°C | -2.1°C | 19 mm | 81% | 2.9 m/s | 4.6 |
| 2020 | 11.3°C | 7.4°C | 3.5°C | 17.0°C | -1.1°C | 19 mm | 84% | 3.5 m/s | 4.5 |
| 2019 | 11.2°C | 7.6°C | 4.0°C | 17.7°C | -1.1°C | 48 mm | 86% | 4.1 m/s | 3.6 |
| 2018 | 9.3°C | 6.7°C | 4.0°C | 14.3°C | -2.4°C | 84 mm | 90% | 4.1 m/s | 3.4 |
| 2017 | 9.6°C | 6.6°C | 3.6°C | 12.8°C | -1.1°C | 30 mm | 86% | 4.1 m/s | 3.7 |
| 2016 | 8.3°C | 5.4°C | 2.6°C | 14.8°C | 0.0°C | 89 mm | 85% | 3.6 m/s | 3.9 |
| 2015 | 10.0°C | 6.5°C | 3.1°C | 16.1°C | -1.1°C | 66 mm | 87% | 3.3 m/s | 4.3 |
| 2014 | 11.2°C | 8.1°C | 5.1°C | 15.8°C | 1.5°C | 72 mm | 88% | 3.9 m/s | 3.5 |
| 2013 | 8.0°C | 5.0°C | 2.1°C | 11.3°C | -2.4°C | 94 mm | 86% | 4.6 m/s | 4 |
| 2012 | 8.3°C | 5.4°C | 2.4°C | 10.9°C | -1.3°C | 68 mm | 86% | 3.6 m/s | 3.8 |
| 2011 🔥 | 12.7°C | 9.3°C | 5.8°C | 18.2°C | 2.4°C | 55 mm | 86% | 3.6 m/s | 4 |
| 2010 | 10.1°C | 6.8°C | 3.5°C | 15.6°C | -1.0°C | 62 mm | 87% | 3.2 m/s | 3.9 |
| 2009 | 11.1°C | 8.0°C | 4.9°C | 14.8°C | 2.4°C | 79 mm | 88% | 3.9 m/s | 3.5 |
| 2008 | 9.0°C | 6.1°C | 3.2°C | 14.0°C | -0.6°C | 78 mm | 86% | 3.8 m/s | 3.8 |
| 2007 | 12.6°C | 8.9°C | 5.3°C | 18.4°C | 0.0°C | 38 mm | 87% | 3.5 m/s | 4 |
| 2006 | 8.7°C | 5.9°C | 3.0°C | 12.9°C | -1.8°C | 72 mm | 87% | 4 m/s | 4 |
| 2005 | 9.9°C | 6.8°C | 3.7°C | 13.9°C | -0.4°C | 107 mm | 87% | 4.5 m/s | 3.6 |
| 2004 | 10.4°C | 7.7°C | 5.0°C | 14.5°C | 0.3°C | 97 mm | 90% | 4.1 m/s | 3.4 |
| 2003 | 11.8°C | 8.3°C | 4.7°C | 19.3°C | -2.2°C | 52 mm | 85% | 3.5 m/s | 3.8 |
| 2002 | 10.5°C | 7.2°C | 4.0°C | 14.1°C | -1.1°C | 77 mm | 86% | 3.8 m/s | 3.5 |
| 2001 | 8.4°C | 5.4°C | 2.4°C | 11.1°C | -0.5°C | 85 mm | 88% | 3.7 m/s | 3.4 |
| 2000 | 8.5°C | 5.5°C | 2.5°C | 14.8°C | -1.8°C | 77 mm | 87% | 3.7 m/s | 3.3 |
| 1999 | 10.3°C | 7.4°C | 4.5°C | 16.5°C | -1.3°C | 100 mm | 89% | 3.9 m/s | 3.6 |
| 1998 | 8.0°C | 5.2°C | 2.3°C | 12.2°C | -2.5°C | 88 mm | 87% | 3.9 m/s | 3.5 |
| 1997 | 10.4°C | 7.2°C | 4.0°C | 14.4°C | -0.4°C | 56 mm | 88% | 3.6 m/s | 3.2 |
| 1996 | 9.2°C | 6.5°C | 3.8°C | 12.7°C | -1.2°C | 110 mm | 90% | 4.1 m/s | 2.9 |
| 1995 | 9.6°C | 6.4°C | 3.1°C | 14.6°C | -0.8°C | 44 mm | 88% | 3.9 m/s | 3.5 |
| 1994 | 8.7°C | 5.7°C | 2.7°C | 13.3°C | -0.4°C | 95 mm | 89% | 4.3 m/s | 3.4 |
| 1993 | 10.1°C | 7.3°C | 4.5°C | 17.8°C | 1.8°C | 131 mm | 90% | 3.9 m/s | 3 |
| 1992 | 8.7°C | 6.2°C | 3.6°C | 12.5°C | -1.1°C | 110 mm | 89% | 4.7 m/s | 3.1 |
| 1991 | 8.9°C | 5.9°C | 2.9°C | 14.7°C | -1.5°C | 134 mm | 86% | 4.9 m/s | 3.4 |
| 1990 | 9.4°C | 6.3°C | 3.3°C | 18.5°C | -1.8°C | 77 mm | 86% | 4.1 m/s | 3.6 |
| 1989 | 7.8°C | 4.8°C | 1.9°C | 11.8°C | -2.1°C | 69 mm | 85% | 3.5 m/s | 3.4 |
| 1988 | 10.0°C | 6.6°C | 3.3°C | 13.8°C | -1.0°C | 57 mm | 86% | 3.2 m/s | 3.4 |
| 1987 | 10.6°C | 7.6°C | 4.5°C | 17.8°C | -0.4°C | 54 mm | 89% | 3.7 m/s | 3.3 |
| 1986 ❄️ | 7.0°C | 4.0°C | 1.0°C | 11.6°C | -2.2°C | 65 mm | 86% | 3.9 m/s | 3.3 |
| 1985 | 9.0°C | 6.1°C | 3.3°C | 13.4°C | -1.9°C | 90 mm | 88% | 4.2 m/s | 3.2 |
| 1984 | 10.3°C | 6.4°C | 2.5°C | 19.4°C | -2.6°C | 38 mm | 86% | 3.5 m/s | 3.7 |
| 1983 | 7.4°C | 4.6°C | 1.8°C | 11.6°C | -2.0°C | 55 mm | 85% | 3.3 m/s | — |
| 1982 | 10.1°C | 6.9°C | 3.6°C | 13.2°C | -1.0°C | 39 mm | 86% | 3.5 m/s | — |
| 1981 | 10.3°C | 6.3°C | 2.3°C | 15.0°C | -3.1°C | 36 mm | 85% | 3.3 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 9.8°C with lows near 3.5°C (mean 6.7°C), based on 45 years of NASA POWER data.
April averages 72 mm of rainfall in Irvine, one of the drier months. The wettest on record was 143 mm in 2024.
The hottest April reached 19.4°C in 1984. The coldest dipped to -3.1°C in 1981.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 1°C. Daytime highs moved from 9.4°C to 10.6°C and overnight lows from 2.7°C to 3.7°C over the same span.
April is one of the cooler months of the year in Irvine and one of the drier months, so plan for around 9.8°C daytime highs and 3.5°C at night.
Not quite — April is the 6th coolest month in Irvine, averaging 6.7°C.
For April in Irvine, pack warm layers and a jacket for chilly mornings, with typical highs of 9.8°C and lows of 3.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 87% — quite humid.
Average wind speed in April is 3.8 m/s. The windiest April on record averaged 4.9 m/s (1991).
The wettest April on record was 2024 with 143 mm. On average, April sees 72 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 April, 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 April specifically, along with year-by-year records and how the month has changed over the decades.
