How hot is it in Austin Texas in March?

My band are playing at the South by South West Festival (SXSW) I'm so stoked about it! (The band is Exodus Calling if you'd like to know) :D But I'm very fair, I@m used to English cold weather, have red hair and i'm not very good in extreme heat.

So how hot is it in Austin in March please? :)
Update: Oh - please tell me in Celsius! :-)
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