But the 31.2 ° C reached at Gogerddan in Ceredigion is the hottest in Wales in 2021 to date. All parts of Wales have experienced high temperatures with 30.6C (87F) recorded in Hawarden in Flintshire, 30.3C (86.5F) in Bala in Gwynedd and 30.2C (86.3F) in Usk in Monmouthshire and Cardiff. What is the hottest temperature on record in Wales? Although temperatures soared across the country on Thursday, they were not the highest ever recorded in Wales or even in July. The highest July temperature in Wales was 34.6 ° C (94.2) in 2006 - but the highest ever recorded in Wales was at 35.2C (95.3F) Hawarden Bridge in Flintshire on August 2, 1990. What will the weather be like in Waless on weekends? The Met Office has said heavy thunderstorms are likely, which could be torrential with a potential of up to 100 mm of rain falling in places. Image copyright Met Office caption of the image 'image The yellow warning is in place for Saturday and Sunday Lightning and hail are also expected and there is a small risk of flooding and power outage, forecasters warned .