When travelling, we recommend packing in preparation to handle common weather conditions. The rainfall in Sumburgh/Shetland is typically greater than that of Newquay. We can gather that this will continue over the next 29 days.
You can imagine temperatures to be in the 19 °C range in July. The weather in Newquay is generally hotter than Sumburgh/Shetland's. As flight availability is subject to become more limited as peak season approaches it is ideal to book in a timely manner.