Summary: The common causes of signal loss during rain, and the safe checks you can do yourself.
Many dish owners notice weaker signal or pixelated pictures during rain or humid weather. Heavy cloud and rain can affect reception, but in most cases the real cause is the dish position, cables or connectors.
Start by checking whether the dish has moved. A strong wind or storm can shift it slightly, and even a small change can reduce signal strength. Next, inspect the cable and connectors. Loose or wet connectors can let water in and cause corrosion. Dirt, debris or bird nests on the LNB can also block the signal.
Do not climb onto a roof to adjust the dish yourself. Falls are a serious risk. If the problem keeps coming back, a trained technician can measure the signal and find the exact cause.