Weather in San Juan, TX
Updated 2026-09-26 09:00 local time · ZIP codes 78589
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
83°20% rain
85°10% rain
88°12% rain91°5% rain93°10% rain95°9% rain
97°7% rain97°5% rain95°7% rain92°9% rain91°11% rain
89°13% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 20%).
It feels like 89°F with winds near 7 mph.
85°F, 10% rain chance and 8 mph wind.
Visibility is around 6 mi; gusts may reach 26 mph.
Current temperature is 83°F, wind 7 mph, rain chance up to 20%.
UV index is 1.
Local weather characteristics in San Juan
Texas spans several climate zones, from humid Gulf Coast areas to dry western deserts and the High Plains. Heat, severe thunderstorms, tropical systems and winter cold outbreaks can all affect different parts of the state.
San Juan is part of the South weather region. The forecast point is near 26.19°N latitude and 98.16°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
San Juan weather today
Overcast and 83°F in San Juan, TX. Today's high is 97°F with a 13% rain chance. Winds are around 7 mph with gusts near 11 mph. Relative humidity is 75%, pressure is 29.96 inHg, and visibility is about 6 miles.
Tonight and tomorrow in San Juan
Sunrise is at 07:22 AM and sunset is at 07:25 PM. Tomorrow's forecast calls for Overcast with a high near 98°F and a low near 80°F. The maximum rain chance is 9%.