April is one of the cooler months of the year in Santa Ana, with average highs near 18°C and lows around 13.4°C (mean 15.7°C). It is one of the drier months, averaging 18 mm of rainfall and 75% relative humidity across the period.
April is one of the cooler months of the year in Santa Ana. Across 45 years of records, the warmest April in Santa Ana was 1992 — when the month averaged 18°C — while the coldest was 2001 at 13.7°C. Typical April days reach 18°C with nights near 13.4°C. The long-term trend is cooling, about 0.2°C per decade.
April is one of the drier months in Santa Ana, averaging 18 mm of rainfall. The wettest April on record was 1983 with 100 mm, while the driest was 1993 at 0 mm.
Relative humidity in Santa Ana during April averages 75%. The most humid April was 2019 at 83%, and the least humid was 1984 at 64%.
April receives about 6.4 kWh/m²/day of solar energy in Santa Ana. The sunniest April was 2017 at 7.2 kWh/m²/day, and the cloudiest was 1990 at 5.6.
Average wind speed in Santa Ana during April is 3 m/s. The windiest Aprils were 1983 and 1984 at 3.8 m/s, while the calmest was 1992 at 2.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.3°C | 15.9°C | 15.0°C | 15.8°C | 15.4°C | -0.9°C |
| Avg High | 18.9°C | 18.3°C | 17.1°C | 18.1°C | 17.5°C | -1.4°C |
| Avg Low | 13.6°C | 13.6°C | 12.9°C | 13.6°C | 13.4°C | -0.2°C |
| Avg Rain | 26 mm | 15 mm | 18 mm | 13 mm | 19 mm | -7 mm |
April temperatures in Santa Ana have fallen by about 0.5°C between 1981–1985 and 2021–2025.
April has ranged from a record low of 8.6°C (1982) to a record high of 30.9°C (1989).
Rainfall in April is one of the drier months, averaging 18 mm, with a wettest year of 100 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.3°C per decade while lows rose 0°C per decade, narrowing the gap between day and night.
A good time to visit Santa Ana
April is a good time to visit Santa Ana, with days averaging 18°C and nights around 13.4°C (mean 15.7°C, cooler than Santa Ana's yearly average) and low rainfall. August and September 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 | 17.0°C | 15.0°C | 13.0°C | 22.6°C | 11.1°C | 4 mm | 79% | 2.7 m/s | 6.1 |
| 2024 | 16.7°C | 14.8°C | 12.9°C | 21.2°C | 10.4°C | 14 mm | 82% | 2.8 m/s | 6.3 |
| 2023 | 16.0°C | 14.2°C | 12.4°C | 23.8°C | 9.5°C | 2 mm | 83% | 2.5 m/s | 6.3 |
| 2022 | 19.1°C | 16.7°C | 14.2°C | 29.7°C | 11.4°C | 4 mm | 76% | 3.1 m/s | 6.9 |
| 2021 | 18.0°C | 15.8°C | 13.5°C | 25.4°C | 11.7°C | 1 mm | 76% | 2.8 m/s | 6.6 |
| 2020 | 17.9°C | 16.1°C | 14.3°C | 26.0°C | 11.8°C | 86 mm | 82% | 2.6 m/s | 5.9 |
| 2019 | 17.5°C | 15.7°C | 13.8°C | 21.4°C | 12.4°C | 4 mm | 83% | 2.8 m/s | 6.4 |
| 2018 | 17.6°C | 15.4°C | 13.1°C | 24.9°C | 11.1°C | 3 mm | 76% | 3 m/s | 6.8 |
| 2017 | 18.7°C | 16.4°C | 14.2°C | 24.6°C | 11.2°C | 6 mm | 78% | 3 m/s | 7.2 |
| 2016 | 19.4°C | 17.1°C | 14.8°C | 27.5°C | 13.0°C | 15 mm | 74% | 3 m/s | 6.6 |
| 2015 | 19.7°C | 17.3°C | 14.8°C | 25.3°C | 12.7°C | 4 mm | 69% | 2.7 m/s | 6.8 |
| 2014 | 19.0°C | 16.5°C | 14.1°C | 29.3°C | 11.4°C | 11 mm | 71% | 3 m/s | 6.9 |
| 2013 | 17.7°C | 15.4°C | 13.1°C | 21.8°C | 11.1°C | 1 mm | 76% | 3.1 m/s | 6.4 |
| 2012 | 17.4°C | 15.0°C | 12.7°C | 22.0°C | 10.2°C | 38 mm | 74% | 2.9 m/s | 6.4 |
| 2011 | 17.6°C | 15.4°C | 13.2°C | 22.9°C | 8.9°C | 2 mm | 77% | 3 m/s | 6.5 |
| 2010 | 16.2°C | 14.2°C | 12.3°C | 23.0°C | 10.8°C | 44 mm | 75% | 3.3 m/s | 6.6 |
| 2009 | 17.4°C | 15.1°C | 12.9°C | 27.8°C | 10.2°C | 1 mm | 72% | 2.9 m/s | 6.7 |
| 2008 | 18.3°C | 15.7°C | 13.1°C | 29.2°C | 10.9°C | 3 mm | 70% | 2.7 m/s | 7 |
| 2007 | 16.8°C | 14.6°C | 12.5°C | 21.2°C | 10.9°C | 15 mm | 77% | 2.8 m/s | 6.1 |
| 2006 | 16.5°C | 14.7°C | 12.9°C | 20.0°C | 11.1°C | 39 mm | 78% | 2.8 m/s | 6 |
| 2005 | 17.3°C | 15.2°C | 13.1°C | 22.1°C | 10.9°C | 20 mm | 77% | 3 m/s | 6.8 |
| 2004 | 18.6°C | 16.3°C | 14.1°C | 27.4°C | 12.8°C | 7 mm | 75% | 2.7 m/s | 6.6 |
| 2003 | 16.4°C | 14.4°C | 12.4°C | 24.0°C | 10.7°C | 29 mm | 76% | 3.5 m/s | 6.6 |
| 2002 | 16.3°C | 14.5°C | 12.6°C | 19.4°C | 10.2°C | 4 mm | 77% | 3.1 m/s | 6 |
| 2001 ❄️ | 15.6°C | 13.7°C | 11.9°C | 25.1°C | 9.5°C | 31 mm | 77% | 3.1 m/s | 6 |
| 2000 | 18.2°C | 16.1°C | 13.9°C | 22.5°C | 12.1°C | 27 mm | 78% | 3.1 m/s | 6.5 |
| 1999 | 16.0°C | 14.0°C | 11.9°C | 26.7°C | 8.8°C | 41 mm | 71% | 3.6 m/s | 5.7 |
| 1998 | 16.7°C | 14.7°C | 12.8°C | 22.5°C | 9.6°C | 30 mm | 76% | 3.4 m/s | 6.6 |
| 1997 | 19.4°C | 16.7°C | 14.0°C | 25.2°C | 11.0°C | 2 mm | 70% | 3.5 m/s | 6.6 |
| 1996 | 19.9°C | 17.0°C | 14.1°C | 25.6°C | 11.8°C | 12 mm | 70% | 3.1 m/s | 7 |
| 1995 | 17.5°C | 15.1°C | 12.7°C | 24.3°C | 9.9°C | 26 mm | 77% | 3.5 m/s | 6.1 |
| 1994 | 17.4°C | 15.3°C | 13.1°C | 23.1°C | 11.6°C | 20 mm | 77% | 3.1 m/s | 5.8 |
| 1993 | 19.3°C | 16.8°C | 14.3°C | 22.5°C | 12.0°C | 0 mm | 75% | 2.7 m/s | 6.6 |
| 1992 🔥 | 20.3°C | 18.0°C | 15.7°C | 23.7°C | 14.0°C | 1 mm | 76% | 2.4 m/s | 6.3 |
| 1991 | 17.9°C | 15.3°C | 12.7°C | 24.2°C | 9.7°C | 1 mm | 73% | 3.2 m/s | 6.7 |
| 1990 | 18.9°C | 16.6°C | 14.3°C | 22.2°C | 11.8°C | 18 mm | 76% | 2.8 m/s | 5.6 |
| 1989 | 20.4°C | 17.6°C | 14.8°C | 30.9°C | 12.2°C | 1 mm | 71% | 3.1 m/s | 6.3 |
| 1988 | 19.1°C | 16.7°C | 14.3°C | 27.6°C | 12.2°C | 55 mm | 71% | 3.1 m/s | 5.8 |
| 1987 | 20.3°C | 17.4°C | 14.5°C | 29.2°C | 12.3°C | 4 mm | 68% | 2.5 m/s | 6.3 |
| 1986 | 18.7°C | 16.1°C | 13.5°C | 25.3°C | 11.2°C | 17 mm | 72% | 3.1 m/s | 6.3 |
| 1985 | 19.0°C | 16.3°C | 13.6°C | 26.0°C | 11.5°C | 1 mm | 69% | 2.8 m/s | 6.3 |
| 1984 | 19.3°C | 16.4°C | 13.5°C | 25.7°C | 11.1°C | 17 mm | 64% | 3.8 m/s | 6.2 |
| 1983 🌧️ | 16.8°C | 14.6°C | 12.4°C | 21.9°C | 9.2°C | 100 mm | 74% | 3.8 m/s | — |
| 1982 | 18.0°C | 15.5°C | 12.9°C | 25.9°C | 8.6°C | 27 mm | 72% | 3.2 m/s | — |
| 1981 | 18.8°C | 16.0°C | 13.2°C | 27.6°C | 11.1°C | 9 mm | 70% | 2.9 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 18°C with lows near 13.4°C (mean 15.7°C), based on 45 years of NASA POWER data.
April averages 18 mm of rainfall in Santa Ana, one of the drier months. The wettest on record was 100 mm in 1983.
The hottest April reached 30.9°C in 1989. The coldest dipped to 8.6°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have fallen by about 0.5°C — but days and nights have moved in opposite directions. Overnight lows rose from 13.1°C to 13.2°C while daytime highs eased from 18.4°C to 17.4°C, narrowing the gap between day and night.
April is one of the cooler months of the year in Santa Ana and one of the drier months, so plan for around 18°C daytime highs and 13.4°C at night.
Not quite — April is the 5th coolest month in Santa Ana, averaging 15.7°C.
For April in Santa Ana, pack light layers you can adjust through the day, with typical highs of 18°C and lows of 13.4°C.
Relative humidity in April averages 75% — moderately humid.
Average wind speed in April is 3 m/s. The windiest April on record averaged 3.8 m/s (1983).
The wettest April on record was 1983 with 100 mm. On average, April sees 18 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 Santa Ana 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.
