When travelling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Liverpool is roughly greater than that of Abha. You can assume this to be the case over the next 16 days.
Expect the weather to be around 31 °C on average in June. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in Abha is generally hotter than in Liverpool.