Most consumer drones are not rated for rain, and the reasons go beyond simple water damage.
Electronics and moisture
Water intrusion into the flight controller, ESCs, or battery contacts can cause short circuits mid-flight — not just after landing. A drone that suddenly cuts power over water, a road, or a crowd is far more dangerous than one that simply gets wet on the ground.
Propeller and motor effects
Rain reduces propeller efficiency and adds unpredictable weight distribution as water beads or streams off the blades, which can subtly affect stability, especially in gusty rain.
Camera and gimbal risk
Even a light drizzle can fog or spot a lens instantly, and gimbals are rarely sealed as well as the main body — moisture reaching gimbal motors is a common cause of expensive repairs.
Reduced visibility compounds the risk
Rain often arrives with lower visibility and cloud ceilings, which independently increases the risk of losing visual line of sight — a core requirement in most drone regulations.
What to do instead
Check current precipitation before flying, not just a general forecast — light drizzle can start well before a forecast's stated rain window. If rain starts mid-flight, land immediately rather than trying to finish the shot.