Taking the temperature
...in August Peter recorded 25C/77F in a hot spot, but only 18C/64F in a damp, shady spot - the sort of difference you might find between St Tropez and Southport.
The amount of rain received also varied hugely, with 50 per cent less on the leeward side than the windward side.
Dampness affects the temperature quite dramatically, because water removes heat from the surroundings as it evaporates.
Even the colour of the soil affects the speed at which it heats up, with darker soils absorbing more heat than lighter types.
The thermal inertia of water - it takes a long time to heat up and cool down - means it is still radiating warmth after the rest of the garden has cooled.
But luckily we know the world's temperature to the last tenth of a degree....