Wikipedia: A cagoule, cagoul, kagoule or kagool (from the French cagoule meaning balaklava) is the British English term for a lightweight (usually without lining), weatherproof raincoat or anorak with a hood, which often comes in knee-length.
But it looks like you won't need to bring yours. The British Broadcasting Corporation predict Sun, White Clouds, Daytime Temperatures around 20°c for the Exile weekend. Weee.
On-Line Ticket Sales will be ending this weekend so Buy Yours Now )) or pay a little more on the gate ((.
P.S. How to type the degree symbol in Linux.