April is one of the cooler months of the year in Casa Grande, with average highs near 29.7°C and lows around 12.2°C (mean 21°C). It is one of the drier months, averaging 7 mm of rainfall and 30% relative humidity across the period.
April is one of the cooler months of the year in Casa Grande. Across 45 years of records, the warmest April in Casa Grande was 1989 — when the month averaged 24.4°C — while the coldest was 1983 at 16.4°C. Typical April days reach 29.7°C with nights near 12.2°C. The long-term trend is warming, about 0.4°C per decade.
April is one of the drier months in Casa Grande, averaging 7 mm of rainfall. The wettest April on record was 1988 with 44 mm, while the driest were 2018, 2022 and 2023, among others at 0 mm.
Relative humidity in Casa Grande during April averages 30%. The most humid April was 1983 at 47%, and the least humid was 2018 at 16%.
April receives about 7.3 kWh/m²/day of solar energy in Casa Grande. The sunniest April was 2008 at 7.9 kWh/m²/day, and the cloudiest was 1988 at 6.4.
Average wind speed in Casa Grande during April is 2.2 m/s. The windiest April was 1999 at 2.7 m/s, while the calmest was 1992 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.8°C | 19.8°C | 20.7°C | 21.8°C | 21.9°C | +1.1°C |
| Avg High | 29.7°C | 28.5°C | 29.4°C | 30.4°C | 30.7°C | +1°C |
| Avg Low | 12.0°C | 11.1°C | 11.9°C | 13.3°C | 13.2°C | +1.2°C |
| Avg Rain | 12 mm | 8 mm | 9 mm | 5 mm | 2 mm | -10 mm |
April temperatures in Casa Grande have risen by about 2.1°C between 1981–1985 and 2021–2025.
April has ranged from a record low of 2°C (1999) to a record high of 41.1°C (1989).
Rainfall in April is one of the drier months, averaging 7 mm, with a wettest year of 44 mm.
One of the best times to visit Casa Grande
April is one of the best times to visit Casa Grande. Expect days averaging 29.7°C and nights around 12.2°C (mean 21°C) — cooler than Casa Grande's yearly average — with low rainfall (7 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 | 30.3°C | 21.9°C | 13.5°C | 38.8°C | 6.9°C | 2 mm | 23% | 2 m/s | 7.4 |
| 2024 | 29.0°C | 20.5°C | 12.0°C | 36.3°C | 5.5°C | 5 mm | 34% | 1.9 m/s | 7.5 |
| 2023 | 30.3°C | 21.2°C | 12.2°C | 38.4°C | 4.2°C | 0 mm | 29% | 1.9 m/s | 7.7 |
| 2022 | 32.3°C | 23.0°C | 13.6°C | 36.8°C | 7.7°C | 0 mm | 18% | 2.3 m/s | 7.8 |
| 2021 | 32.2°C | 23.4°C | 14.7°C | 37.4°C | 10.0°C | 2 mm | 19% | 2.3 m/s | 7.3 |
| 2020 | 29.9°C | 21.5°C | 13.0°C | 39.4°C | 7.8°C | 2 mm | 37% | 2 m/s | 7.6 |
| 2019 | 30.1°C | 21.9°C | 13.7°C | 37.4°C | 8.8°C | 2 mm | 33% | 2.1 m/s | 7.3 |
| 2018 | 32.7°C | 24.1°C | 15.4°C | 37.7°C | 8.4°C | 0 mm | 16% | 2.2 m/s | 7.5 |
| 2017 | 31.4°C | 22.7°C | 13.9°C | 38.3°C | 7.8°C | 0 mm | 23% | 2.1 m/s | 7.5 |
| 2016 | 29.8°C | 21.7°C | 13.6°C | 36.7°C | 8.4°C | 14 mm | 27% | 2.3 m/s | 7.3 |
| 2015 | 30.0°C | 21.6°C | 13.1°C | 36.9°C | 8.0°C | 8 mm | 25% | 2.1 m/s | 7.5 |
| 2014 | 30.6°C | 21.9°C | 13.3°C | 37.2°C | 5.7°C | 2 mm | 21% | 2.3 m/s | 7.2 |
| 2013 | 30.6°C | 21.7°C | 12.8°C | 38.7°C | 6.3°C | 3 mm | 25% | 2.3 m/s | 7.6 |
| 2012 | 30.9°C | 22.2°C | 13.5°C | 40.4°C | 5.9°C | 4 mm | 21% | 2 m/s | 7.4 |
| 2011 | 30.2°C | 21.5°C | 12.7°C | 36.5°C | 4.0°C | 13 mm | 26% | 2.6 m/s | 7.4 |
| 2010 | 27.2°C | 18.9°C | 10.5°C | 34.2°C | 5.2°C | 2 mm | 36% | 2.2 m/s | 7.2 |
| 2009 | 28.7°C | 20.0°C | 11.3°C | 37.8°C | 4.8°C | 8 mm | 26% | 2.4 m/s | 7.5 |
| 2008 | 29.8°C | 20.3°C | 10.8°C | 36.9°C | 7.3°C | 0 mm | 24% | 2.6 m/s | 7.9 |
| 2007 | 29.6°C | 20.9°C | 12.2°C | 38.5°C | 6.8°C | 7 mm | 29% | 2.1 m/s | 7.4 |
| 2006 | 28.8°C | 20.3°C | 11.9°C | 35.1°C | 6.2°C | 1 mm | 30% | 1.8 m/s | 7.2 |
| 2005 | 28.6°C | 19.7°C | 10.8°C | 34.4°C | 6.3°C | 6 mm | 37% | 2.3 m/s | 7.4 |
| 2004 | 28.7°C | 20.6°C | 12.4°C | 36.1°C | 8.3°C | 27 mm | 35% | 2.4 m/s | 7.1 |
| 2003 | 27.8°C | 19.1°C | 10.3°C | 34.1°C | 6.4°C | 4 mm | 31% | 2.5 m/s | 7.6 |
| 2002 | 32.1°C | 23.3°C | 14.6°C | 38.1°C | 8.4°C | 2 mm | 22% | 2.2 m/s | 7.4 |
| 2001 | 28.5°C | 19.8°C | 11.2°C | 37.0°C | 4.5°C | 29 mm | 37% | 2.1 m/s | 7.2 |
| 2000 | 31.8°C | 22.6°C | 13.5°C | 40.1°C | 6.4°C | 1 mm | 25% | 2.1 m/s | 7.6 |
| 1999 | 25.6°C | 17.2°C | 8.8°C | 35.5°C | 2.0°C | 29 mm | 35% | 2.7 m/s | 7.2 |
| 1998 | 25.2°C | 16.8°C | 8.4°C | 35.5°C | 3.3°C | 7 mm | 45% | 2.4 m/s | 7.6 |
| 1997 | 28.3°C | 20.0°C | 11.7°C | 36.1°C | 5.8°C | 11 mm | 29% | 2.4 m/s | 7.2 |
| 1996 | 31.5°C | 21.9°C | 12.4°C | 39.5°C | 8.1°C | 0 mm | 19% | 2.4 m/s | 7.8 |
| 1995 | 27.1°C | 18.4°C | 9.7°C | 34.0°C | 4.9°C | 10 mm | 38% | 2.2 m/s | 7.2 |
| 1994 | 29.3°C | 20.6°C | 11.9°C | 37.4°C | 7.1°C | 8 mm | 31% | 2.3 m/s | 7.2 |
| 1993 | 29.2°C | 20.3°C | 11.3°C | 35.5°C | 5.9°C | 0 mm | 41% | 2 m/s | 7.6 |
| 1992 | 30.8°C | 22.0°C | 13.1°C | 38.9°C | 7.5°C | 8 mm | 42% | 1.7 m/s | 7.4 |
| 1991 | 27.9°C | 18.8°C | 9.7°C | 34.0°C | 4.5°C | 0 mm | 35% | 2.2 m/s | 7.7 |
| 1990 | 30.1°C | 21.9°C | 13.7°C | 36.8°C | 8.5°C | 10 mm | 33% | 2.2 m/s | 6.8 |
| 1989 🔥 | 34.1°C | 24.4°C | 14.8°C | 41.1°C | 10.2°C | 0 mm | 22% | 2.1 m/s | 7.4 |
| 1988 🌧️ | 28.8°C | 20.3°C | 11.8°C | 35.9°C | 6.9°C | 44 mm | 34% | 2.2 m/s | 6.4 |
| 1987 | 31.3°C | 22.2°C | 13.2°C | 36.2°C | 6.5°C | 2 mm | 32% | 2.4 m/s | 6.9 |
| 1986 | 29.6°C | 20.9°C | 12.1°C | 35.9°C | 6.9°C | 3 mm | 32% | 2.3 m/s | 7 |
| 1985 | 31.0°C | 22.1°C | 13.2°C | 36.6°C | 5.8°C | 7 mm | 35% | 2.1 m/s | 7.1 |
| 1984 | 27.9°C | 18.8°C | 9.8°C | 37.7°C | 4.3°C | 28 mm | 31% | 2.6 m/s | 6.5 |
| 1983 ❄️ | 24.6°C | 16.4°C | 8.2°C | 32.7°C | 2.9°C | 9 mm | 47% | 2.3 m/s | — |
| 1982 | 28.9°C | 20.3°C | 11.8°C | 34.6°C | 6.1°C | 1 mm | 33% | 2 m/s | — |
| 1981 | 31.3°C | 22.1°C | 12.9°C | 37.0°C | 5.0°C | 11 mm | 33% | 2.2 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 29.7°C with lows near 12.2°C (mean 21°C), based on 45 years of NASA POWER data.
April averages 7 mm of rainfall in Casa Grande, one of the drier months. The wettest on record was 44 mm in 1988.
The hottest April reached 41.1°C in 1989. The coldest dipped to 2°C in 1999.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 2.1°C. Daytime highs moved from 28.7°C to 30.8°C and overnight lows from 11.2°C to 13.2°C over the same span.
April is one of the cooler months of the year in Casa Grande and one of the drier months, so plan for around 29.7°C daytime highs and 12.2°C at night.
Not quite — April is the 6th coolest month in Casa Grande, averaging 21°C.
For April in Casa Grande, pack light layers you can adjust through the day, with typical highs of 29.7°C and lows of 12.2°C.
Relative humidity in April averages 30% — relatively dry.
Average wind speed in April is 2.2 m/s. The windiest April on record averaged 2.7 m/s (1999).
The wettest April on record was 1988 with 44 mm. On average, April sees 7 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 Casa Grande 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.
