When travelling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Humberside is roughly less than Leeds. You can assume this to be the case over the next 22 days.
Expect the weather to be around 22 °C on average in July. 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 Leeds is generally colder than in Humberside.