San Isidro, Texas — City Overview

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Living in San Isidro, summers are intense — Aug highs average 98.5°F, while winters stay mild, with Feb lows rarely below 52.6°F. At just 130 heating degree days per year, home heating costs are minimal. With 26.3 inches annually, the climate is relatively dry. Median household income: $40,492. With a 11.4% poverty rate and 86.3% homeownership, the community reflects a stable residential mix. Nearby cities: Alton (31mi S), Doffing (31mi S), Rio Grande City (32mi SW). Air quality is Good — avg AQI 42 over the past week.

View San Isidro city guide

Updated August 17, 2026.

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