It would be great to implement a layer which would show whether flying a drone in a specific area is possible with the weather conditions at that moment in time. It would be a RAG type of map, where Green is good conditions, amber is ok but not great, red is not recommended to fly.
The heat map would be based on several elements you've already got data on, such as precipitation, wind speed/direction, dew point, etc. For each of these elements you would be able to implement a range and thus create said heat map.