Sunnyvale, Texas — City Overview

Living in Sunnyvale, summers are intense — Aug highs average 95.6°F, while winters are cool, with Feb lows hovering around 38.5°F. With 1816 heating degree days annually, heating costs are moderate. Annual rainfall reaches 58.2 inches, mostly summer thunderstorms. Median household income: $152,632. With a 7.2% poverty rate and 84.5% homeownership, the community reflects a stable residential mix. Nearby cities: Balch Springs (6mi SW), Forney (6mi SE), Heath (6mi NE). Air quality is Good — avg AQI 49 over the past week.

View Sunnyvale city guide

Updated August 21, 2026.

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