Short answer is yes. In Portland, rain is very common and mainly it is manageable with a canopy our units are equipped with. The canopy needs some room to setup so there will need to be at least 5 ft clearance around the serviced vehicle plus close access to the service unit. If wind is above 20 mph while raining there is a possibility of reschedule. Please contact us if you think the weather will be an issue at time of service.