Original: The highest temperature ever, recorded on 28 July 1921, was 40.3 C (104.5 F), and the lowest was a 20.7 C (5.3 F) reached on 1 January 1985.
Simplified: The highest temperature ever, recorded on 31 July 1983, was 38.8 C (101.8 F), and the lowest was a 20.7 C (5.3 F) reached on 1 January 1985.