Digital terrestrial TV – The effects of weather

The picture breaking up (pixelation) or freezing or losing reception completely can be a sign of co-channel interference. This is caused by signals from different transmitters overlapping, and happens when high air pressure (which brings fine weather) allows signals to reach areas they would not normally reach.

High air pressure can also cause the signal to become weaker in low-lying areas.

Unfortunately, there is no solution to this kind of interference. Broadcasters can't prevent it, and adjusting your aerial will make no difference. Reception will only improve when the weather changes.

In high winds, the TV signal may be affected as your aerial moves in the wind. If you have tall trees around your property, the same can happen when the trees move. Wet leaves on tall trees can also weaken the signal. You may need to upgrade your aerial or even raise its height. See TV aerials and connections.

If your TV reception deteriorates during heavy rain and is still poor when the rain has passed, it may be that water has got into the aerial or the downlead. If possible, check first to see if it is only your TV that is affected, for example by asking a neighbour. Also check Digital UK's Planned Engineering Works to see if there is work going on at your local transmitter.