June is one of the warmer months of the year in San Antonio, with average highs near 34.3°C and lows around 22.2°C (mean 28.3°C). It is a relatively wet time of year, averaging 88 mm of rainfall and 67% relative humidity across the period.
June is one of the warmer months of the year in San Antonio. Across 45 years of records, the warmest June in San Antonio was 2022 — when the month averaged 31.5°C — while the coldest was 1987 at 24.9°C. Typical June days reach 34.3°C with nights near 22.2°C. The long-term trend is warming, about 0.5°C per decade.
June is a relatively wet time of year in San Antonio, averaging 88 mm of rainfall. The wettest June on record was 1987 with 258 mm, while the driest was 2005 at 5 mm.
Relative humidity in San Antonio during June averages 67%. The most humid June was 1987 at 85%, and the least humid was 2022 at 51%.
June receives about 6.7 kWh/m²/day of solar energy in San Antonio. The sunniest June was 1990 at 7.5 kWh/m²/day, and the cloudiest was 1993 at 5.7.
Average wind speed in San Antonio during June is 2.9 m/s. The windiest June was 2008 at 4.1 m/s, while the calmest was 1992 at 2.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.1°C | 28.1°C | 28.5°C | 28.5°C | 29.3°C | +2.2°C |
| Avg High | 33.0°C | 34.1°C | 34.7°C | 34.4°C | 35.5°C | +2.5°C |
| Avg Low | 21.3°C | 22.1°C | 22.4°C | 22.5°C | 23.1°C | +1.8°C |
| Avg Rain | 121 mm | 103 mm | 88 mm | 63 mm | 56 mm | -65 mm |
June temperatures in San Antonio have risen by about 2.3°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 13.9°C (1984) to a record high of 43.6°C (2023).
Rainfall in June is a relatively wet time of year, averaging 88 mm, with a wettest year of 258 mm.
A good time to visit San Antonio
June is a good time to visit San Antonio, with days averaging 34.3°C and nights around 22.2°C (mean 28.3°C, warmer than San Antonio's yearly average) and higher rainfall. April and October 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 | 34.8°C | 29.1°C | 23.3°C | 37.9°C | 21.4°C | 91 mm | 70% | 3 m/s | 6.8 |
| 2024 | 36.7°C | 30.4°C | 24.1°C | 39.6°C | 21.1°C | 77 mm | 65% | 2.9 m/s | 6.7 |
| 2023 | 37.4°C | 30.4°C | 23.4°C | 43.6°C | 18.7°C | 37 mm | 64% | 2.5 m/s | 6.9 |
| 2022 🔥 | 38.9°C | 31.5°C | 24.1°C | 41.8°C | 21.3°C | 16 mm | 51% | 3.1 m/s | 7.4 |
| 2021 | 31.8°C | 26.9°C | 22.1°C | 35.4°C | 18.5°C | 81 mm | 77% | 2.5 m/s | 6.2 |
| 2020 | 33.3°C | 27.5°C | 21.6°C | 38.3°C | 17.2°C | 37 mm | 67% | 2.8 m/s | 6.6 |
| 2019 | 34.2°C | 28.4°C | 22.6°C | 38.8°C | 19.1°C | 121 mm | 70% | 2.6 m/s | 6.4 |
| 2018 | 36.6°C | 30.2°C | 23.8°C | 40.7°C | 22.5°C | 25 mm | 61% | 3.6 m/s | 6.7 |
| 2017 | 35.4°C | 28.9°C | 22.3°C | 41.5°C | 19.5°C | 46 mm | 63% | 2.8 m/s | 6.7 |
| 2016 | 31.9°C | 26.8°C | 21.7°C | 35.9°C | 16.2°C | 62 mm | 74% | 2.3 m/s | 6.9 |
| 2015 | 29.9°C | 25.8°C | 21.7°C | 31.8°C | 18.3°C | 104 mm | 83% | 2.3 m/s | 6.3 |
| 2014 | 33.7°C | 28.1°C | 22.5°C | 36.5°C | 17.4°C | 67 mm | 69% | 3.6 m/s | 6.3 |
| 2013 | 34.2°C | 28.1°C | 22.0°C | 42.9°C | 17.6°C | 55 mm | 67% | 2.7 m/s | 6.6 |
| 2012 | 36.3°C | 29.7°C | 23.0°C | 42.5°C | 20.0°C | 16 mm | 57% | 2.9 m/s | 6.8 |
| 2011 | 37.9°C | 30.4°C | 22.9°C | 41.4°C | 19.1°C | 42 mm | 54% | 3.5 m/s | 7.4 |
| 2010 | 33.7°C | 28.3°C | 22.9°C | 37.0°C | 18.5°C | 93 mm | 71% | 3.1 m/s | 6.5 |
| 2009 | 36.6°C | 29.7°C | 22.8°C | 41.1°C | 15.9°C | 12 mm | 57% | 3.3 m/s | 7.2 |
| 2008 | 37.8°C | 30.6°C | 23.5°C | 40.1°C | 22.0°C | 11 mm | 54% | 4.1 m/s | 7 |
| 2007 | 30.7°C | 26.1°C | 21.6°C | 34.8°C | 18.3°C | 153 mm | 79% | 2.6 m/s | 6 |
| 2006 | 35.7°C | 28.9°C | 22.1°C | 40.2°C | 19.4°C | 36 mm | 57% | 2.8 m/s | 7.2 |
| 2005 | 36.5°C | 29.4°C | 22.4°C | 39.9°C | 20.1°C | 5 mm | 58% | 2.9 m/s | 6.8 |
| 2004 | 31.0°C | 26.6°C | 22.1°C | 38.8°C | 19.8°C | 244 mm | 79% | 2.8 m/s | 5.8 |
| 2003 | 34.0°C | 28.2°C | 22.3°C | 37.7°C | 17.8°C | 114 mm | 69% | 2.3 m/s | 6.5 |
| 2002 | 35.7°C | 29.3°C | 23.0°C | 38.4°C | 19.6°C | 120 mm | 58% | 3.1 m/s | 6.6 |
| 2001 | 35.8°C | 29.0°C | 22.3°C | 40.0°C | 20.6°C | 52 mm | 61% | 2.9 m/s | 7.1 |
| 2000 | 33.0°C | 27.4°C | 21.7°C | 36.9°C | 16.3°C | 133 mm | 71% | 3.4 m/s | 6 |
| 1999 | 34.1°C | 28.4°C | 22.8°C | 37.8°C | 20.3°C | 113 mm | 68% | 3.4 m/s | 6.1 |
| 1998 | 38.5°C | 31.1°C | 23.8°C | 42.6°C | 17.4°C | 34 mm | 54% | 3.9 m/s | 6.7 |
| 1997 | 30.4°C | 25.8°C | 21.1°C | 33.3°C | 15.5°C | 224 mm | 81% | 2.3 m/s | 6.3 |
| 1996 | 35.8°C | 29.0°C | 22.2°C | 40.6°C | 16.3°C | 70 mm | 60% | 2.8 m/s | 7.1 |
| 1995 | 33.0°C | 26.5°C | 20.1°C | 37.1°C | 14.7°C | 88 mm | 67% | 2.8 m/s | 6.9 |
| 1994 | 34.6°C | 28.4°C | 22.1°C | 39.5°C | 20.2°C | 74 mm | 69% | 2.6 m/s | 7 |
| 1993 | 30.4°C | 26.0°C | 21.6°C | 35.6°C | 16.5°C | 173 mm | 81% | 3.2 m/s | 5.7 |
| 1992 | 31.1°C | 26.1°C | 21.1°C | 33.4°C | 15.1°C | 119 mm | 80% | 2.2 m/s | 7.1 |
| 1991 | 34.4°C | 28.4°C | 22.4°C | 38.0°C | 19.7°C | 118 mm | 68% | 2.8 m/s | 6.5 |
| 1990 | 38.5°C | 31.2°C | 23.8°C | 41.3°C | 21.8°C | 20 mm | 53% | 3.8 m/s | 7.5 |
| 1989 | 35.5°C | 28.5°C | 21.6°C | 39.4°C | 15.0°C | 76 mm | 60% | 3.5 m/s | 6.6 |
| 1988 | 34.5°C | 27.5°C | 20.6°C | 41.1°C | 16.5°C | 72 mm | 60% | 2.5 m/s | 7 |
| 1987 ❄️ 🌧️ | 28.9°C | 24.9°C | 20.8°C | 32.5°C | 18.1°C | 258 mm | 85% | 2.4 m/s | 6.1 |
| 1986 | 31.3°C | 26.3°C | 21.4°C | 36.7°C | 19.9°C | 112 mm | 76% | 2.3 m/s | 6.4 |
| 1985 | 32.3°C | 26.5°C | 20.7°C | 36.6°C | 14.8°C | 150 mm | 69% | 2.7 m/s | 6.5 |
| 1984 | 35.7°C | 28.8°C | 22.0°C | 40.8°C | 13.9°C | 40 mm | 58% | 3.4 m/s | 6.9 |
| 1983 | 33.3°C | 26.9°C | 20.4°C | 38.5°C | 14.0°C | 95 mm | 69% | 2.6 m/s | — |
| 1982 | 35.4°C | 28.7°C | 22.1°C | 38.6°C | 18.2°C | 59 mm | 63% | 2.9 m/s | — |
| 1981 | 30.3°C | 26.1°C | 22.0°C | 36.0°C | 18.2°C | 229 mm | 82% | 2.8 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 34.3°C with lows near 22.2°C (mean 28.3°C), based on 45 years of NASA POWER data.
June averages 88 mm of rainfall in San Antonio, a relatively wet time of year. The wettest on record was 258 mm in 1987.
The hottest June reached 43.6°C in 2023. The coldest dipped to 13.9°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 2.3°C. Daytime highs moved from 33.4°C to 35.9°C and overnight lows from 21.4°C to 23.4°C over the same span.
June is one of the warmer months of the year in San Antonio and a relatively wet time of year, so plan for around 34.3°C daytime highs and 22.2°C at night.
Not quite — June is the 10th coolest month in San Antonio, averaging 28.3°C.
For June in San Antonio, pack light, breathable clothing and sun protection, with typical highs of 34.3°C and lows of 22.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 67% — moderately humid.
Average wind speed in June is 2.9 m/s. The windiest June on record averaged 4.1 m/s (2008).
The wettest June on record was 1987 with 258 mm. On average, June sees 88 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 Antonio 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.
