March is one of the cooler months of the year in Casa Grande, with average highs near 25°C and lows around 8.7°C (mean 16.9°C). It is about average for rainfall, averaging 25 mm of rainfall and 40% relative humidity across the period.
March is one of the cooler months of the year in Casa Grande. Across 45 years of records, the warmest March in Casa Grande was 2004 — when the month averaged 20.7°C — while the coldest was 1991 at 13.1°C. Typical March days reach 25°C with nights near 8.7°C. The long-term trend is warming, about 0.4°C per decade.
March is about average for rainfall in Casa Grande, averaging 25 mm of rainfall. The wettest March on record was 1983 with 89 mm, while the driest were 1984 and 2009 at 0 mm.
Relative humidity in Casa Grande during March averages 40%. The most humid March was 1992 at 61%, and the least humid was 2002 at 23%.
March receives about 5.9 kWh/m²/day of solar energy in Casa Grande. The sunniest Marchs were 2002 and 2008 at 6.4 kWh/m²/day, and the cloudiest was 1991 at 5.3.
Average wind speed in Casa Grande during March is 2 m/s. The windiest March was 1991 at 2.5 m/s, while the calmest were 1992 and 1993 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.3°C | 16.2°C | 16.8°C | 18.1°C | 16.5°C | +0.2°C |
| Avg High | 24.5°C | 24.4°C | 25.1°C | 26.3°C | 24.1°C | -0.4°C |
| Avg Low | 8.0°C | 8.1°C | 8.6°C | 9.9°C | 9.0°C | +1°C |
| Avg Rain | 31 mm | 33 mm | 21 mm | 13 mm | 28 mm | -3 mm |
March temperatures in Casa Grande have risen by about 0.9°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -1.4°C (1990) to a record high of 37.5°C (2007).
Rainfall in March is about average for rainfall, averaging 25 mm, with a wettest year of 89 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.3°C per decade while lows rose 0.5°C per decade, narrowing the gap between day and night.
A good time to visit Casa Grande
March is a good time to visit Casa Grande, with days averaging 25°C and nights around 8.7°C (mean 16.9°C, cooler than Casa Grande's yearly average) and low rainfall. April and October are marginally more temperate, but March still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 25.5°C | 17.6°C | 9.7°C | 36.1°C | 4.4°C | 25 mm | 36% | 2.2 m/s | 6 |
| 2024 | 23.1°C | 16.1°C | 9.1°C | 28.7°C | 6.1°C | 47 mm | 50% | 1.9 m/s | 5.6 |
| 2023 | 22.1°C | 15.1°C | 8.1°C | 27.9°C | 2.3°C | 36 mm | 49% | 2 m/s | 5.5 |
| 2022 | 25.8°C | 17.4°C | 9.1°C | 34.9°C | 2.5°C | 10 mm | 29% | 2.1 m/s | 6.2 |
| 2021 | 24.6°C | 16.3°C | 8.0°C | 31.8°C | 2.8°C | 9 mm | 32% | 2.3 m/s | 6 |
| 2020 | 23.7°C | 16.7°C | 9.8°C | 29.6°C | 5.5°C | 43 mm | 52% | 1.8 m/s | 5.5 |
| 2019 | 24.6°C | 17.0°C | 9.4°C | 30.2°C | 2.8°C | 16 mm | 46% | 2 m/s | 5.8 |
| 2018 | 25.6°C | 17.9°C | 10.1°C | 33.8°C | 2.8°C | 2 mm | 31% | 1.8 m/s | 6 |
| 2017 | 28.5°C | 20.1°C | 11.7°C | 35.6°C | 2.6°C | 5 mm | 36% | 2 m/s | 6.3 |
| 2016 | 27.9°C | 19.7°C | 11.6°C | 34.0°C | 7.1°C | 1 mm | 25% | 1.9 m/s | 6.2 |
| 2015 | 28.1°C | 20.1°C | 12.2°C | 34.6°C | 3.1°C | 17 mm | 38% | 1.8 m/s | 5.9 |
| 2014 | 26.6°C | 18.5°C | 10.4°C | 29.9°C | 8.0°C | 27 mm | 34% | 1.9 m/s | 6.1 |
| 2013 | 27.0°C | 18.4°C | 9.8°C | 33.5°C | 2.9°C | 18 mm | 35% | 1.8 m/s | 6 |
| 2012 | 25.5°C | 16.7°C | 8.0°C | 33.8°C | 2.1°C | 14 mm | 30% | 2 m/s | 6.3 |
| 2011 | 26.7°C | 18.1°C | 9.5°C | 33.1°C | 2.2°C | 7 mm | 33% | 1.9 m/s | 6.3 |
| 2010 | 22.7°C | 14.5°C | 6.3°C | 30.7°C | 1.9°C | 22 mm | 48% | 2 m/s | 6 |
| 2009 | 25.8°C | 17.3°C | 8.9°C | 31.7°C | 4.4°C | 0 mm | 32% | 1.9 m/s | 6.2 |
| 2008 | 25.0°C | 16.5°C | 7.9°C | 30.7°C | 2.2°C | 1 mm | 35% | 1.9 m/s | 6.4 |
| 2007 | 27.3°C | 18.6°C | 9.9°C | 37.5°C | 0.9°C | 25 mm | 29% | 2 m/s | 6.2 |
| 2006 | 22.3°C | 15.0°C | 7.7°C | 29.6°C | 0.9°C | 47 mm | 40% | 2 m/s | 5.4 |
| 2005 | 22.7°C | 15.1°C | 7.6°C | 30.1°C | 2.2°C | 16 mm | 54% | 2 m/s | 6 |
| 2004 🔥 | 29.2°C | 20.7°C | 12.1°C | 35.7°C | 5.8°C | 27 mm | 38% | 2 m/s | 5.8 |
| 2003 | 24.3°C | 16.1°C | 7.9°C | 32.1°C | 2.7°C | 18 mm | 41% | 1.9 m/s | 5.8 |
| 2002 | 25.2°C | 16.1°C | 7.1°C | 34.5°C | -1.1°C | 4 mm | 23% | 2.2 m/s | 6.4 |
| 2001 | 25.1°C | 16.8°C | 8.6°C | 32.3°C | 3.5°C | 21 mm | 44% | 1.8 m/s | 5.9 |
| 2000 | 24.0°C | 16.0°C | 8.0°C | 29.3°C | 3.2°C | 55 mm | 40% | 1.9 m/s | 5.7 |
| 1999 | 26.2°C | 17.5°C | 8.9°C | 32.9°C | 4.6°C | 4 mm | 28% | 2 m/s | 6.1 |
| 1998 | 22.2°C | 14.5°C | 6.7°C | 32.1°C | -0.4°C | 55 mm | 54% | 2.1 m/s | 5.6 |
| 1997 | 28.7°C | 19.2°C | 9.7°C | 34.9°C | 0.2°C | 1 mm | 29% | 1.9 m/s | 6.2 |
| 1996 | 25.4°C | 16.5°C | 7.7°C | 32.2°C | 1.9°C | 12 mm | 34% | 2.2 m/s | 6 |
| 1995 | 24.0°C | 16.2°C | 8.4°C | 31.3°C | 3.2°C | 27 mm | 50% | 1.9 m/s | 5.9 |
| 1994 | 25.3°C | 17.1°C | 8.9°C | 30.3°C | 4.2°C | 31 mm | 43% | 2 m/s | 5.7 |
| 1993 | 24.0°C | 16.2°C | 8.5°C | 29.4°C | 2.4°C | 32 mm | 57% | 1.7 m/s | 5.9 |
| 1992 | 22.2°C | 15.2°C | 8.2°C | 28.0°C | 4.4°C | 80 mm | 61% | 1.7 m/s | 5.4 |
| 1991 ❄️ | 20.9°C | 13.1°C | 5.2°C | 28.3°C | 0.6°C | 71 mm | 51% | 2.5 m/s | 5.3 |
| 1990 | 24.9°C | 16.9°C | 8.9°C | 33.5°C | -1.4°C | 19 mm | 39% | 2.1 m/s | 5.5 |
| 1989 | 27.9°C | 19.0°C | 10.0°C | 33.2°C | 0.6°C | 29 mm | 32% | 2.1 m/s | 5.9 |
| 1988 | 25.5°C | 16.2°C | 6.9°C | 37.1°C | 0.4°C | 5 mm | 33% | 2.2 m/s | 5.9 |
| 1987 | 22.9°C | 14.4°C | 6.0°C | 29.2°C | 0.3°C | 9 mm | 44% | 2.2 m/s | 5.8 |
| 1986 | 26.8°C | 18.6°C | 10.5°C | 34.6°C | 3.3°C | 43 mm | 44% | 2 m/s | 5.5 |
| 1985 | 23.1°C | 15.3°C | 7.5°C | 29.7°C | 1.5°C | 13 mm | 47% | 2.1 m/s | 5.9 |
| 1984 | 26.2°C | 17.2°C | 8.1°C | 30.7°C | 2.1°C | 0 mm | 30% | 2.2 m/s | 6 |
| 1983 🌧️ | 22.1°C | 14.9°C | 7.7°C | 28.6°C | 3.4°C | 89 mm | 60% | 2.2 m/s | — |
| 1982 | 23.0°C | 15.5°C | 8.0°C | 29.2°C | 2.4°C | 48 mm | 46% | 1.9 m/s | — |
| 1981 | 23.1°C | 15.2°C | 7.2°C | 31.3°C | 4.0°C | 44 mm | 47% | 2 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 25°C with lows near 8.7°C (mean 16.9°C), based on 45 years of NASA POWER data.
March averages 25 mm of rainfall in Casa Grande, about average for rainfall. The wettest on record was 89 mm in 1983.
The hottest March reached 37.5°C in 2007. The coldest dipped to -1.4°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 0.9°C. Daytime highs moved from 23.5°C to 24.2°C and overnight lows from 7.7°C to 8.8°C over the same span.
March is one of the cooler months of the year in Casa Grande and about average for rainfall, so plan for around 25°C daytime highs and 8.7°C at night.
Not quite — March is the 4th coolest month in Casa Grande, averaging 16.9°C.
For March in Casa Grande, pack light layers you can adjust through the day, with typical highs of 25°C and lows of 8.7°C.
Relative humidity in March averages 40% — relatively dry.
Average wind speed in March is 2 m/s. The windiest March on record averaged 2.5 m/s (1991).
The wettest March on record was 1983 with 89 mm. On average, March sees 25 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 March, 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 March specifically, along with year-by-year records and how the month has changed over the decades.
