A mid‑day rain threat looms over San Antonio as the National Weather Service issues a 20‑60% chance of showers for Tuesday.
Key points
- NWS assigns a 20‑60% chance of showers before 1 p.m. on Oct. 27, with the greatest likelihood south of I‑35/I‑37.
- The city has a 40% chance of thunderstorms after 10 a.m., with highs near 79 °F and lows near 65 °F.
- Rain risk continues into Wednesday, and more widespread precipitation is expected Thursday‑Friday, possibly bringing heavy rain and localized flooding in the Rio Grande and southern Edwards Plateau.
The National Weather Service (NWS) has issued a forecast indicating a 20‑60% probability of showers and storms across parts of San Antonio before 1 p.m. on Tuesday, Oct. 27, 2026, according to MySanAntonio.
Higher odds are concentrated over the Coastal Plains and the corridor between I‑35 and I‑37 south of the metro area, with isolated storms expected near Hondo, La Grange, Pearsall and Pleasanton, as shown on the NWS discussion map.
Morning chance of showers
After 10 a.m., the Alamo City itself faces a 40% chance of thunderstorms, while daytime temperatures should climb to the high‑70s (around 79 °F) under partly sunny skies; overnight lows are projected near 65 °F, and no rain is expected at that time.
Meteorologists note the risk does not end Tuesday. Weather models show about a 30% chance of showers and thunderstorms between 1 p.m. and 4 p.m. on Wednesday, Oct. 28, and a broader rain system is anticipated for Thursday and Friday across the Rio Grande and southern Edwards Plateau, with the potential for heavy rain and localized flooding.
Isolated storms and afternoon thunder
Residents are encouraged to monitor NWS updates and consider postponing outdoor activities during the higher‑risk windows.
Reader questions
When is the highest chance of rain in San Antonio today?
The NWS indicates the greatest likelihood before 1 p.m., especially between 10 a.m. and early afternoon, with a 40% chance of thunderstorms after 10 a.m. in the city.
Which areas are most likely to see isolated storms?
Isolated storms are possible near Hondo, La Grange, Pearsall and Pleasanton, according to the NWS map.
What weather is expected later this week?
Forecast models suggest a 30% chance of showers on Wednesday afternoon and more widespread rain Thursday‑Friday across the Rio Grande and southern Edwards Plateau, with potential for heavy rain and localized flooding.
Source: mysanantonio.com
