San Antonio weather in 2023
San Antonio weather in 2023, with 365 daily observations from Open-Meteo archive data.
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Use the graph view to inspect 2023 alongside other available years for San Antonio.
Year summary
In 2023, San Antonio averaged 28.3 C for daily highs and 17.3 C for daily lows.
A 1991-2020 normal is not available for this location yet, so this page compares 2023 with the 2023-2025 archive baseline. The 2023 average daily high was +0.1 C from that baseline, and total precipitation was -71.8 mm from the baseline total.
The warmest month was August, with an average high of 39.3 C, while December had the lowest average low at 8.6 C.
The wettest month was October, totaling 190.0 mm. The hottest day reached 41.8 C on August 9, 2023.
Monthly averages and precipitation
| Month | Avg low C | Avg high C | Rain and snow mm | Days |
|---|---|---|---|---|
| January | 9.3 | 20.2 | 36.6 | 31 |
| February | 9.1 | 20.8 | 40.3 | 28 |
| March | 14.6 | 25.6 | 64.2 | 31 |
| April | 15.5 | 26.2 | 154.2 | 30 |
| May | 19.6 | 29.3 | 176.4 | 31 |
| June | 24.0 | 36.9 | 43.1 | 30 |
| July | 25.7 | 38.1 | 15.3 | 31 |
| August | 26.2 | 39.3 | 8.0 | 31 |
| September | 24.7 | 35.8 | 37.3 | 30 |
| October | 17.9 | 27.4 | 190.0 | 31 |
| November | 11.4 | 20.0 | 50.3 | 30 |
| December | 8.6 | 19.8 | 32.4 | 31 |
Daily records in 2023
| Record | Date | Value |
|---|---|---|
| Hottest day | August 9, 2023 | 41.8 C |
| Coldest night | January 31, 2023 | 0.6 C |
| Wettest day | October 5, 2023 | 41.9 mm |
Related pages
Weather data source: Open-Meteo Archive API. City metadata source: GeoNames cities15000.