When travelling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Wick is roughly similar to Indianapolis. You can assume this to be the case over the next 23 days.
You can imagine temperatures to be in the 30 °C range in July. The weather in Indianapolis is generally hotter than Wick's. As flight availability is subject to become more limited as peak season approaches it is ideal to book in a timely manner.