Complex sentence: The absolute maximum temperature recorded was 35.3c (95.5f) during the August 2003 heatwave,-in an average year 11.9 days will report a temperature of 25.1c (77.2f) or above, with the warmest day of the year rising to 29.0c (84.2f).
Split into simpler sentences: The absolute maximum temperature recorded was 35.3c (95.5f) during the August 2003 heatwave. In an average year 11.9 days will report a temperature of 25.1c (77.2f) or above, with the warmest day of the year rising to 29.0c (84.2f).