The funeral of Lance Corporal Craig Roberts from Penrhyn Bay, Conwy will take place in Llandudno today.
The 24-year-old of 3rd Battalion The Royal Anglian Regiment died during a training exercise on the Brecon Beacons last month.
Temperatures reached 30C in Powys on that day.
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There will be some patchy rain but many areas will be dry for much of the time.