July is one of the warmer months of the year in San Antonio, with average highs near 35.4°C and lows around 23.2°C (mean 29.3°C). It is about average for rainfall, averaging 59 mm of rainfall and 63% relative humidity across the period.
July is one of the warmer months of the year in San Antonio. Across 45 years of records, the warmest July in San Antonio was 2023 — when the month averaged 32.6°C — while the coldest was 2007 at 25.5°C. Typical July days reach 35.4°C with nights near 23.2°C. The long-term trend is warming, about 0.4°C per decade.
July is about average for rainfall in San Antonio, averaging 59 mm of rainfall. The wettest July on record was 2007 with 289 mm, while the driest was 1993 at 0 mm.
Relative humidity in San Antonio during July averages 63%. The most humid July was 2007 at 86%, and the least humid was 2000 at 49%.
July receives about 6.8 kWh/m²/day of solar energy in San Antonio. The sunniest July was 1986 at 7.4 kWh/m²/day, and the cloudiest was 2007 at 5.1.
Average wind speed in San Antonio during July is 2.9 m/s. The windiest July was 1993 at 3.8 m/s, while the calmest was 2007 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 28.8°C | 29.1°C | 28.8°C | 29.8°C | 30.4°C | +1.6°C |
| Avg High | 35.1°C | 35.3°C | 34.4°C | 36.1°C | 36.6°C | +1.5°C |
| Avg Low | 22.5°C | 23.0°C | 23.2°C | 23.5°C | 24.1°C | +1.6°C |
| Avg Rain | 43 mm | 48 mm | 97 mm | 44 mm | 60 mm | +17 mm |
July temperatures in San Antonio have risen by about 1.5°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 16.2°C (1985) to a record high of 43.5°C (2018).
Rainfall in July is about average for rainfall, averaging 59 mm, with a wettest year of 289 mm.
A good time to visit San Antonio
July is a good time to visit San Antonio, with days averaging 35.4°C and nights around 23.2°C (mean 29.3°C, warmer than San Antonio's yearly average) and moderate rainfall. April and October are marginally more temperate, but July still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 34.4°C | 28.8°C | 23.2°C | 39.9°C | 20.8°C | 92 mm | 68% | 2.7 m/s | 5.8 |
| 2024 | 35.8°C | 29.9°C | 24.0°C | 40.0°C | 21.6°C | 95 mm | 66% | 2.5 m/s | 6.1 |
| 2023 🔥 | 39.9°C | 32.6°C | 25.2°C | 42.3°C | 23.2°C | 10 mm | 50% | 2.9 m/s | 7.2 |
| 2022 | 39.6°C | 32.5°C | 25.4°C | 42.4°C | 23.9°C | 13 mm | 51% | 3.2 m/s | 7.3 |
| 2021 | 32.5°C | 27.6°C | 22.6°C | 35.8°C | 21.4°C | 123 mm | 76% | 2.4 m/s | 6.2 |
| 2020 | 37.2°C | 30.7°C | 24.2°C | 43.1°C | 22.4°C | 28 mm | 60% | 3.1 m/s | 6.9 |
| 2019 | 36.0°C | 29.7°C | 23.4°C | 39.9°C | 18.0°C | 15 mm | 61% | 2.8 m/s | 7.2 |
| 2018 | 37.1°C | 30.2°C | 23.3°C | 43.5°C | 21.9°C | 63 mm | 60% | 2.5 m/s | 7.1 |
| 2017 | 37.2°C | 30.6°C | 24.1°C | 41.5°C | 22.9°C | 16 mm | 56% | 2.9 m/s | 7.2 |
| 2016 | 37.0°C | 30.6°C | 24.3°C | 40.0°C | 23.1°C | 52 mm | 61% | 3.3 m/s | 7.2 |
| 2015 | 35.7°C | 29.5°C | 23.3°C | 39.6°C | 19.1°C | 4 mm | 66% | 3.3 m/s | 7.1 |
| 2014 | 35.9°C | 29.4°C | 22.8°C | 39.0°C | 20.8°C | 38 mm | 62% | 2.6 m/s | 6.9 |
| 2013 | 35.7°C | 29.3°C | 22.9°C | 39.7°C | 19.0°C | 47 mm | 59% | 2.8 m/s | 6.6 |
| 2012 | 34.7°C | 28.9°C | 23.1°C | 39.0°C | 21.8°C | 89 mm | 66% | 2.5 m/s | 6.7 |
| 2011 | 38.1°C | 31.3°C | 24.4°C | 40.1°C | 22.4°C | 13 mm | 52% | 3.1 m/s | 7.2 |
| 2010 | 33.7°C | 28.5°C | 23.4°C | 37.4°C | 21.4°C | 98 mm | 73% | 2.9 m/s | 6.2 |
| 2009 | 38.5°C | 31.5°C | 24.5°C | 40.8°C | 23.1°C | 29 mm | 52% | 3 m/s | 6.9 |
| 2008 | 34.5°C | 28.4°C | 22.4°C | 38.7°C | 19.9°C | 80 mm | 65% | 3.1 m/s | 6.4 |
| 2007 ❄️ 🌧️ | 29.0°C | 25.5°C | 22.0°C | 31.5°C | 20.4°C | 289 mm | 86% | 2.1 m/s | 5.1 |
| 2006 | 35.0°C | 29.3°C | 23.5°C | 39.0°C | 21.8°C | 53 mm | 64% | 2.9 m/s | 6.5 |
| 2005 | 36.0°C | 30.1°C | 24.2°C | 41.6°C | 21.8°C | 65 mm | 62% | 2.4 m/s | 6.6 |
| 2004 | 33.0°C | 27.5°C | 22.1°C | 37.2°C | 18.9°C | 55 mm | 72% | 2.4 m/s | 6.8 |
| 2003 | 32.2°C | 27.5°C | 22.8°C | 35.5°C | 21.5°C | 123 mm | 75% | 2.4 m/s | 6.2 |
| 2002 | 29.5°C | 26.0°C | 22.4°C | 32.9°C | 20.0°C | 255 mm | 86% | 2.6 m/s | 5.9 |
| 2001 | 37.8°C | 30.9°C | 24.1°C | 41.3°C | 20.4°C | 11 mm | 54% | 3.1 m/s | 7.3 |
| 2000 | 38.4°C | 31.1°C | 23.7°C | 41.9°C | 21.8°C | 11 mm | 49% | 3 m/s | 7.3 |
| 1999 | 33.5°C | 28.0°C | 22.5°C | 38.8°C | 21.2°C | 55 mm | 70% | 2.7 m/s | 6.8 |
| 1998 | 37.6°C | 31.0°C | 24.4°C | 40.8°C | 22.7°C | 39 mm | 56% | 3 m/s | 7.2 |
| 1997 | 34.9°C | 28.7°C | 22.5°C | 38.0°C | 19.8°C | 17 mm | 66% | 2.5 m/s | 7.3 |
| 1996 | 37.7°C | 30.8°C | 23.9°C | 40.1°C | 21.8°C | 38 mm | 55% | 3.2 m/s | 7.2 |
| 1995 | 36.4°C | 29.7°C | 23.1°C | 41.9°C | 20.2°C | 28 mm | 59% | 2.8 m/s | 7.1 |
| 1994 | 37.9°C | 30.7°C | 23.5°C | 40.9°C | 21.4°C | 9 mm | 53% | 3.4 m/s | 7.3 |
| 1993 | 35.0°C | 28.9°C | 22.8°C | 38.8°C | 21.0°C | 0 mm | 67% | 3.8 m/s | 7.2 |
| 1992 | 33.5°C | 27.9°C | 22.3°C | 37.3°C | 19.6°C | 57 mm | 71% | 3.3 m/s | 6.8 |
| 1991 | 34.4°C | 28.4°C | 22.4°C | 40.1°C | 21.1°C | 53 mm | 67% | 2.5 m/s | 6.4 |
| 1990 | 32.2°C | 27.2°C | 22.3°C | 39.1°C | 20.2°C | 187 mm | 69% | 2.9 m/s | 6 |
| 1989 | 37.1°C | 30.1°C | 23.1°C | 41.6°C | 19.4°C | 24 mm | 52% | 2.8 m/s | 7 |
| 1988 | 34.4°C | 28.5°C | 22.6°C | 37.8°C | 19.2°C | 78 mm | 66% | 2.7 m/s | 6.3 |
| 1987 | 32.1°C | 27.0°C | 21.9°C | 35.6°C | 19.6°C | 50 mm | 75% | 2.8 m/s | 6.5 |
| 1986 | 37.2°C | 29.9°C | 22.6°C | 41.5°C | 20.9°C | 9 mm | 54% | 3.2 m/s | 7.4 |
| 1985 | 33.7°C | 27.5°C | 21.3°C | 38.3°C | 16.2°C | 74 mm | 67% | 2.5 m/s | 7.1 |
| 1984 | 36.3°C | 29.5°C | 22.8°C | 40.2°C | 18.8°C | 26 mm | 53% | 2.9 m/s | 7 |
| 1983 | 34.0°C | 28.1°C | 22.3°C | 38.0°C | 20.5°C | 82 mm | 68% | 3 m/s | — |
| 1982 | 38.2°C | 31.0°C | 23.8°C | 40.0°C | 22.3°C | 9 mm | 51% | 3.7 m/s | — |
| 1981 | 33.2°C | 27.8°C | 22.5°C | 37.6°C | 20.9°C | 35 mm | 73% | 2.8 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 35.4°C with lows near 23.2°C (mean 29.3°C), based on 45 years of NASA POWER data.
July averages 59 mm of rainfall in San Antonio, about average for rainfall. The wettest on record was 289 mm in 2007.
The hottest July reached 43.5°C in 2018. The coldest dipped to 16.2°C in 1985.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.5°C. Daytime highs moved from 35.1°C to 36.4°C and overnight lows from 22.5°C to 24.1°C over the same span.
July is one of the warmer months of the year in San Antonio and about average for rainfall, so plan for around 35.4°C daytime highs and 23.2°C at night.
Not quite — July is the 11th coolest month in San Antonio, averaging 29.3°C.
For July in San Antonio, pack light, breathable clothing and sun protection, with typical highs of 35.4°C and lows of 23.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 63% — moderately humid.
Average wind speed in July is 2.9 m/s. The windiest July on record averaged 3.8 m/s (1993).
The wettest July on record was 2007 with 289 mm. On average, July sees 59 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 July, 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 July specifically, along with year-by-year records and how the month has changed over the decades.
