Wind direction will also determine where we set up on any given field, so it pays to know what the prevailing wind direction is (generally southwest in this part of the country) and then being aware of a different wind will be beneficial.
I remember sharing a day on peas with the great pigeon fanatic, Will Garfit. A large field of peas had been badly hit all along one side, the flighting birds arriving from behind the hedge line, to sideslip into the prevailing wind to land. It was going to be awkward, to say the least, but with no urgency to tackle the situation, we decided to monitor the weather to see if any change of wind direction was likely. Sure enough, there was a day coming up where the wind picked up and veered north. This had the effect of pushing the flight line into the field from where they turned upwind into the pattern. We set up either side of a prominent oak, shooting 350!
Dry and cloudy
We need the weather to be dry, ideally with a bit of cloud cover, so neither you nor the pigeons are blinded by the sun. Most of the books I have read advocate trying to set up with the sun behind you, the theory being that the birds will not spot you getting up to shoot if the sun is in their eyes. This ignores the fact that if they can’t see you, there is every chance they can’t see the decoys either! For me, the ideal situation is where approaching birds have the sun behind them, meaning the decoys show up like beacons. I generally have no problem organizing the hide so that I keep out of the sun, keeping still as pigeons approach, and wearing sunglasses when appropriate.