location of outside temp sensor

Can anyone tell me where under the bonnet the outside air temp sensor is located. I have had a problem before in that the compartment that its located in fills with water and the temp reads wrong. Usually very high like 58c. It's a pain when it happens as it messes up the climate control so i only get cold air.
Thought if i could find it i could save myself a trip to the dealer if i drain it myself.

Thanks, my car is different from the Leon in the photo. Mine has no wire in the middle, only on the top and its just a cylinder shaped piece of plastic with a compartment on the front. Hopefully I'll be able to unclip the compartment with a screwdriver and blast out the water with some compressed air.