June is one of the warmer months of the year in San Tan Valley, with average highs near 38.8°C and lows around 21.5°C (mean 30.2°C). It is one of the drier months, averaging 5 mm of rainfall and 18% relative humidity across the period.
June is one of the warmer months of the year in San Tan Valley. Across 45 years of records, the warmest June in San Tan Valley was 2024 — when the month averaged 32.6°C — while the coldest were 1991 and 1995 at 27.4°C. Typical June days reach 38.8°C with nights near 21.5°C. The long-term trend is warming, about 0.5°C per decade.
June is one of the drier months in San Tan Valley, averaging 5 mm of rainfall. The wettest June on record was 2000 with 32 mm, while the driest were 2002, 2014 and 2023, among others at 0 mm.
Relative humidity in San Tan Valley during June averages 18%. The most humid June was 2000 at 28%, and the least humid was 2002 at 12%.
June receives about 8.3 kWh/m²/day of solar energy in San Tan Valley. The sunniest Junes were 2003, 2004 and 2012 at 8.8 kWh/m²/day, and the cloudiest was 1988 at 7.
Average wind speed in San Tan Valley during June is 2.4 m/s. The windiest Junes were 1984 and 2020 at 2.7 m/s, while the calmest were 2012, 2016 and 2018, among others at 2.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 29.6°C | 29.0°C | 30.3°C | 31.0°C | 31.1°C | +1.5°C |
| Avg High | 38.4°C | 37.9°C | 38.8°C | 39.6°C | 39.5°C | +1.1°C |
| Avg Low | 20.8°C | 20.2°C | 21.8°C | 22.4°C | 22.7°C | +1.9°C |
| Avg Rain | 6 mm | 4 mm | 7 mm | 5 mm | 6 mm | 0 mm |
June temperatures in San Tan Valley have risen by about 1.9°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 11.2°C (1991) to a record high of 47.1°C (1990).
Rainfall in June is one of the drier months, averaging 5 mm, with a wettest year of 32 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.4°C per decade while lows rose 0.7°C per decade, narrowing the gap between day and night.
A good time to visit San Tan Valley
June is a good time to visit San Tan Valley, with days averaging 38.8°C and nights around 21.5°C (mean 30.2°C, warmer than San Tan Valley's yearly average) and low rainfall. October and May are marginally more temperate, but June still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 39.6°C | 31.0°C | 22.5°C | 45.3°C | 19.0°C | 9 mm | 18% | 2.3 m/s | 8.5 |
| 2024 🔥 | 40.9°C | 32.6°C | 24.4°C | 45.0°C | 18.9°C | 7 mm | 20% | 2.4 m/s | 7.8 |
| 2023 | 37.2°C | 28.8°C | 20.4°C | 43.0°C | 15.0°C | 0 mm | 14% | 2.3 m/s | 8.7 |
| 2022 | 39.4°C | 31.4°C | 23.4°C | 43.6°C | 18.7°C | 16 mm | 24% | 2.5 m/s | 7.9 |
| 2021 | 40.8°C | 32.4°C | 24.1°C | 46.2°C | 18.5°C | 2 mm | 17% | 2.5 m/s | 8.1 |
| 2020 | 39.2°C | 30.3°C | 21.4°C | 43.0°C | 14.2°C | 0 mm | 16% | 2.7 m/s | 8.6 |
| 2019 | 38.3°C | 29.9°C | 21.4°C | 43.4°C | 18.0°C | 0 mm | 17% | 2.3 m/s | 8.5 |
| 2018 | 39.0°C | 30.8°C | 22.5°C | 41.6°C | 17.6°C | 12 mm | 17% | 2.2 m/s | 8.4 |
| 2017 | 40.8°C | 32.0°C | 23.2°C | 46.5°C | 16.6°C | 4 mm | 14% | 2.3 m/s | 8.6 |
| 2016 | 40.1°C | 32.0°C | 23.9°C | 46.7°C | 19.5°C | 17 mm | 20% | 2.2 m/s | 8.1 |
| 2015 | 39.2°C | 31.2°C | 23.2°C | 43.2°C | 18.3°C | 14 mm | 26% | 2.3 m/s | 7.8 |
| 2014 | 39.6°C | 31.1°C | 22.5°C | 41.5°C | 19.9°C | 0 mm | 14% | 2.4 m/s | 8.7 |
| 2013 | 40.7°C | 31.9°C | 23.0°C | 44.9°C | 20.2°C | 1 mm | 13% | 2.3 m/s | 8.6 |
| 2012 | 40.0°C | 31.3°C | 22.5°C | 42.3°C | 18.5°C | 2 mm | 15% | 2.2 m/s | 8.8 |
| 2011 | 39.0°C | 30.1°C | 21.3°C | 44.6°C | 16.5°C | 1 mm | 13% | 2.3 m/s | 8.7 |
| 2010 | 38.8°C | 29.8°C | 20.9°C | 43.8°C | 15.9°C | 1 mm | 17% | 2.4 m/s | 8.6 |
| 2009 | 35.9°C | 28.2°C | 20.6°C | 40.9°C | 14.9°C | 8 mm | 24% | 2.2 m/s | 7.8 |
| 2008 | 39.3°C | 30.5°C | 21.8°C | 44.2°C | 13.8°C | 5 mm | 17% | 2.3 m/s | 8.7 |
| 2007 | 38.7°C | 30.4°C | 22.0°C | 42.5°C | 14.4°C | 3 mm | 15% | 2.3 m/s | 8.5 |
| 2006 | 39.6°C | 31.5°C | 23.3°C | 42.1°C | 18.8°C | 10 mm | 19% | 2.3 m/s | 8.2 |
| 2005 | 38.4°C | 29.7°C | 21.0°C | 44.5°C | 15.6°C | 1 mm | 19% | 2.4 m/s | 8.6 |
| 2004 | 38.9°C | 30.1°C | 21.3°C | 42.8°C | 15.5°C | 1 mm | 13% | 2.3 m/s | 8.8 |
| 2003 | 39.0°C | 30.0°C | 21.0°C | 42.7°C | 17.6°C | 0 mm | 15% | 2.5 m/s | 8.8 |
| 2002 | 40.6°C | 31.6°C | 22.6°C | 43.6°C | 16.2°C | 0 mm | 12% | 2.6 m/s | 8.7 |
| 2001 | 39.3°C | 30.5°C | 21.8°C | 43.1°C | 16.4°C | 7 mm | 18% | 2.5 m/s | 8.6 |
| 2000 🌧️ | 38.0°C | 30.2°C | 22.4°C | 42.5°C | 18.4°C | 32 mm | 28% | 2.2 m/s | 8 |
| 1999 | 37.5°C | 29.3°C | 21.1°C | 41.8°C | 12.8°C | 3 mm | 21% | 2.5 m/s | 8.6 |
| 1998 | 36.3°C | 27.5°C | 18.8°C | 43.1°C | 12.9°C | 1 mm | 19% | 2.6 m/s | 8.3 |
| 1997 | 37.7°C | 28.8°C | 19.9°C | 41.3°C | 15.3°C | 3 mm | 17% | 2.6 m/s | 8.5 |
| 1996 | 40.1°C | 31.2°C | 22.3°C | 43.0°C | 17.4°C | 5 mm | 15% | 2.5 m/s | 8.2 |
| 1995 | 36.6°C | 27.4°C | 18.3°C | 42.0°C | 12.0°C | 0 mm | 17% | 2.6 m/s | 7.9 |
| 1994 | 40.0°C | 31.2°C | 22.4°C | 46.2°C | 17.0°C | 5 mm | 19% | 2.4 m/s | 8 |
| 1993 | 37.4°C | 28.3°C | 19.3°C | 44.3°C | 11.3°C | 1 mm | 21% | 2.4 m/s | 8.4 |
| 1992 | 36.7°C | 28.0°C | 19.3°C | 40.9°C | 14.8°C | 10 mm | 27% | 2.4 m/s | 7.9 |
| 1991 ❄️ | 36.5°C | 27.4°C | 18.4°C | 42.4°C | 11.2°C | 3 mm | 18% | 2.3 m/s | 7.5 |
| 1990 | 40.1°C | 31.0°C | 22.0°C | 47.1°C | 15.1°C | 5 mm | 18% | 2.5 m/s | 8.1 |
| 1989 | 38.7°C | 29.6°C | 20.6°C | 43.8°C | 15.4°C | 2 mm | 15% | 2.6 m/s | 8.3 |
| 1988 | 39.1°C | 30.2°C | 21.3°C | 44.0°C | 13.7°C | 8 mm | 19% | 2.3 m/s | 7 |
| 1987 | 38.6°C | 30.0°C | 21.3°C | 43.1°C | 17.4°C | 4 mm | 18% | 2.3 m/s | 8.3 |
| 1986 | 38.7°C | 30.3°C | 21.8°C | 42.0°C | 16.7°C | 5 mm | 20% | 2.4 m/s | 8 |
| 1985 | 40.1°C | 30.7°C | 21.3°C | 44.5°C | 14.4°C | 1 mm | 15% | 2.5 m/s | 8 |
| 1984 | 36.6°C | 28.6°C | 20.7°C | 41.2°C | 15.8°C | 26 mm | 25% | 2.7 m/s | 7.8 |
| 1983 | 36.9°C | 27.8°C | 18.7°C | 41.3°C | 13.6°C | 0 mm | 19% | 2.4 m/s | — |
| 1982 | 37.2°C | 27.9°C | 18.6°C | 41.6°C | 14.5°C | 1 mm | 14% | 2.4 m/s | — |
| 1981 | 40.1°C | 31.3°C | 22.5°C | 44.0°C | 18.2°C | 6 mm | 19% | 2.5 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 38.8°C with lows near 21.5°C (mean 30.2°C), based on 45 years of NASA POWER data.
June averages 5 mm of rainfall in San Tan Valley, one of the drier months. The wettest on record was 32 mm in 2000.
The hottest June reached 47.1°C in 1990. The coldest dipped to 11.2°C in 1991.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 1.9°C. Daytime highs moved from 38.2°C to 39.6°C and overnight lows from 20.4°C to 23°C over the same span.
June is one of the warmer months of the year in San Tan Valley and one of the drier months, so plan for around 38.8°C daytime highs and 21.5°C at night.
Not quite — June is the 10th coolest month in San Tan Valley, averaging 30.2°C.
For June in San Tan Valley, pack light, breathable clothing and sun protection, with typical highs of 38.8°C and lows of 21.5°C.
Relative humidity in June averages 18% — relatively dry.
Average wind speed in June is 2.4 m/s. The windiest June on record averaged 2.7 m/s (1984).
The wettest June on record was 2000 with 32 mm. On average, June sees 5 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 San Tan Valley behaves each June, 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 June specifically, along with year-by-year records and how the month has changed over the decades.
