May is one of the warmer months of the year in Apache Junction, with average highs near 30.9°C and lows around 14.4°C (mean 22.7°C). It is one of the drier months, averaging 8 mm of rainfall and 28% relative humidity across the period.
May is one of the warmer months of the year in Apache Junction. Across 45 years of records, the warmest May in Apache Junction was 1984 — when the month averaged 25.8°C — while the coldest was 1995 at 18.5°C. Typical May days reach 30.9°C with nights near 14.4°C. The long-term trend is warming, about 0.4°C per decade.
May is one of the drier months in Apache Junction, averaging 8 mm of rainfall. The wettest May on record was 1992 with 69 mm, while the driest was 2014 at 0 mm.
Relative humidity in Apache Junction during May averages 28%. The most humid May was 1992 at 53%, and the least humid was 2002 at 15%.
May receives about 8 kWh/m²/day of solar energy in Apache Junction. The sunniest Mays were 2012 and 2022 at 8.6 kWh/m²/day, and the cloudiest was 1992 at 6.7.
Average wind speed in Apache Junction during May is 2.4 m/s. The windiest May was 2011 at 2.7 m/s, while the calmest were 1994, 2005 and 2009, among others at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 22.2°C | 21.7°C | 23.8°C | 22.2°C | 23.9°C | +1.7°C |
| Avg High | 30.5°C | 29.7°C | 32.1°C | 30.3°C | 32.1°C | +1.6°C |
| Avg Low | 13.8°C | 13.6°C | 15.5°C | 14.0°C | 15.8°C | +2°C |
| Avg Rain | 9 mm | 13 mm | 8 mm | 7 mm | 3 mm | -7 mm |
May temperatures in Apache Junction have risen by about 1.6°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 1.5°C (1988) to a record high of 41.6°C (2020).
Rainfall in May is one of the drier months, averaging 8 mm, with a wettest year of 69 mm.
One of the best times to visit Apache Junction
May is one of the best times to visit Apache Junction. Expect days averaging 30.9°C and nights around 14.4°C (mean 22.7°C) — warmer than Apache Junction's yearly average — with low rainfall (8 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 | 31.6°C | 23.5°C | 15.4°C | 37.3°C | 9.4°C | 5 mm | 21% | 2.4 m/s | 7.8 |
| 2024 | 31.2°C | 23.1°C | 15.1°C | 37.3°C | 9.3°C | 0 mm | 25% | 2.2 m/s | 8.3 |
| 2023 | 30.7°C | 23.2°C | 15.7°C | 35.0°C | 9.8°C | 8 mm | 32% | 2.2 m/s | 8.2 |
| 2022 | 33.2°C | 24.4°C | 15.6°C | 38.2°C | 8.0°C | 0 mm | 16% | 2.5 m/s | 8.6 |
| 2021 | 32.4°C | 24.1°C | 15.8°C | 35.8°C | 9.3°C | 1 mm | 16% | 2.4 m/s | 8.5 |
| 2020 | 33.4°C | 25.2°C | 16.9°C | 41.6°C | 10.1°C | 1 mm | 25% | 2.3 m/s | 8.5 |
| 2019 | 26.6°C | 19.5°C | 12.4°C | 34.2°C | 7.9°C | 11 mm | 36% | 2.2 m/s | 7.5 |
| 2018 | 32.6°C | 24.6°C | 16.7°C | 38.0°C | 8.4°C | 2 mm | 19% | 2.4 m/s | 8.3 |
| 2017 | 31.2°C | 22.7°C | 14.2°C | 38.1°C | 8.7°C | 5 mm | 27% | 2.5 m/s | 8.1 |
| 2016 | 30.1°C | 22.3°C | 14.5°C | 37.2°C | 9.5°C | 5 mm | 26% | 2.4 m/s | 8.2 |
| 2015 | 27.9°C | 20.7°C | 13.4°C | 38.0°C | 8.1°C | 34 mm | 36% | 2.2 m/s | 7.7 |
| 2014 | 31.5°C | 23.2°C | 14.9°C | 38.2°C | 7.9°C | 0 mm | 19% | 2.6 m/s | 8.1 |
| 2013 | 31.6°C | 23.4°C | 15.1°C | 35.7°C | 10.6°C | 0 mm | 23% | 2.5 m/s | 8.2 |
| 2012 | 33.3°C | 24.5°C | 15.6°C | 40.4°C | 10.9°C | 2 mm | 16% | 2.6 m/s | 8.6 |
| 2011 | 29.4°C | 20.7°C | 12.1°C | 35.2°C | 5.1°C | 6 mm | 21% | 2.7 m/s | 8.4 |
| 2010 | 28.8°C | 20.2°C | 11.5°C | 34.3°C | 3.9°C | 1 mm | 30% | 2.4 m/s | 8.5 |
| 2009 | 32.6°C | 24.9°C | 17.1°C | 38.1°C | 13.2°C | 18 mm | 31% | 2.1 m/s | 7.6 |
| 2008 | 28.4°C | 20.4°C | 12.3°C | 38.1°C | 6.0°C | 34 mm | 32% | 2.4 m/s | 7.8 |
| 2007 | 32.2°C | 24.0°C | 15.9°C | 38.8°C | 6.9°C | 9 mm | 24% | 2.4 m/s | 8.2 |
| 2006 | 33.0°C | 24.7°C | 16.4°C | 37.0°C | 11.8°C | 2 mm | 18% | 2.4 m/s | 8.3 |
| 2005 | 30.5°C | 22.7°C | 15.0°C | 39.0°C | 7.9°C | 4 mm | 35% | 2.1 m/s | 8.2 |
| 2004 | 32.7°C | 24.0°C | 15.3°C | 36.4°C | 9.5°C | 0 mm | 19% | 2.5 m/s | 8.4 |
| 2003 | 31.7°C | 23.4°C | 15.1°C | 40.1°C | 7.3°C | 3 mm | 26% | 2.2 m/s | 8 |
| 2002 | 32.1°C | 23.5°C | 14.8°C | 40.4°C | 9.3°C | 0 mm | 15% | 2.4 m/s | 8.4 |
| 2001 | 33.8°C | 25.0°C | 16.3°C | 39.1°C | 6.1°C | 11 mm | 27% | 2.4 m/s | 8.2 |
| 2000 | 34.3°C | 25.4°C | 16.5°C | 41.0°C | 8.1°C | 0 mm | 18% | 2.5 m/s | 8.5 |
| 1999 | 30.5°C | 22.2°C | 13.9°C | 38.0°C | 5.8°C | 1 mm | 22% | 2.5 m/s | 8.2 |
| 1998 | 27.6°C | 20.0°C | 12.4°C | 33.2°C | 6.3°C | 2 mm | 39% | 2.2 m/s | 8 |
| 1997 | 34.1°C | 25.6°C | 17.2°C | 39.2°C | 9.0°C | 9 mm | 25% | 2.4 m/s | 8 |
| 1996 | 32.9°C | 24.0°C | 15.1°C | 40.5°C | 10.9°C | 1 mm | 18% | 2.6 m/s | 8.3 |
| 1995 ❄️ | 26.1°C | 18.5°C | 10.9°C | 33.6°C | 4.8°C | 7 mm | 41% | 2.3 m/s | 7.6 |
| 1994 | 29.4°C | 21.5°C | 13.6°C | 35.3°C | 7.9°C | 23 mm | 34% | 2.1 m/s | 7.5 |
| 1993 | 29.8°C | 21.9°C | 14.0°C | 34.6°C | 8.5°C | 10 mm | 43% | 2.3 m/s | 8.1 |
| 1992 🌧️ | 28.8°C | 22.0°C | 15.1°C | 34.1°C | 11.0°C | 69 mm | 53% | 2.1 m/s | 6.7 |
| 1991 | 28.3°C | 19.9°C | 11.5°C | 33.9°C | 6.3°C | 3 mm | 32% | 2.5 m/s | 8 |
| 1990 | 29.4°C | 21.0°C | 12.7°C | 34.7°C | 7.5°C | 7 mm | 27% | 2.5 m/s | 7.8 |
| 1989 | 31.8°C | 23.3°C | 14.8°C | 39.4°C | 9.2°C | 6 mm | 22% | 2.5 m/s | 7.8 |
| 1988 | 30.1°C | 21.6°C | 13.2°C | 36.3°C | 1.5°C | 1 mm | 30% | 2.4 m/s | 7.4 |
| 1987 | 28.9°C | 21.4°C | 13.8°C | 32.7°C | 7.3°C | 19 mm | 38% | 2.3 m/s | 7.4 |
| 1986 | 31.3°C | 22.6°C | 13.9°C | 37.3°C | 6.5°C | 4 mm | 27% | 2.4 m/s | 8 |
| 1985 | 30.8°C | 22.7°C | 14.6°C | 35.7°C | 8.6°C | 1 mm | 33% | 2.3 m/s | 7.6 |
| 1984 🔥 | 34.6°C | 25.8°C | 16.9°C | 41.3°C | 8.9°C | 5 mm | 24% | 2.4 m/s | 7.6 |
| 1983 | 29.1°C | 20.3°C | 11.4°C | 38.3°C | 5.6°C | 1 mm | 38% | 2.4 m/s | — |
| 1982 | 28.9°C | 20.6°C | 12.3°C | 35.0°C | 5.5°C | 31 mm | 36% | 2.3 m/s | — |
| 1981 | 29.3°C | 21.2°C | 13.1°C | 33.4°C | 8.6°C | 17 mm | 30% | 2.4 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 30.9°C with lows near 14.4°C (mean 22.7°C), based on 45 years of NASA POWER data.
May averages 8 mm of rainfall in Apache Junction, one of the drier months. The wettest on record was 69 mm in 1992.
The hottest May reached 41.6°C in 2020. The coldest dipped to 1.5°C in 1988.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.6°C. Daytime highs moved from 30.5°C to 31.8°C and overnight lows from 13.7°C to 15.5°C over the same span.
May is one of the warmer months of the year in Apache Junction and one of the drier months, so plan for around 30.9°C daytime highs and 14.4°C at night.
Not quite — May is the 8th coolest month in Apache Junction, averaging 22.7°C.
For May in Apache Junction, pack light, breathable clothing and sun protection, with typical highs of 30.9°C and lows of 14.4°C.
Relative humidity in May averages 28% — relatively dry.
Average wind speed in May is 2.4 m/s. The windiest May on record averaged 2.7 m/s (2011).
The wettest May on record was 1992 with 69 mm. On average, May sees 8 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 Apache Junction 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.
