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The thermometer reached 47.5 degrees Celsius in the city of Hermosillo on August 21, 2026. The reading was documented at the Hermosillo Observatory station by the Northwest Basin Organization. This figure represents a new record high temperature for August 21 in the Sonoran capital. The previous highest temperature for this same date was 46.0 degrees Celsius, measured in 2005. With this temperature, the Sonoran capital also tied the record high …