Average IF current month?

[The Boosh!]

Hi all,

I have a set of data in column A which are dates.

I have a set of data in column B which are numbers

I want a forumula that will automatically average the months data dependant on what the current month is.

I've been playing with array functions:

=if(dates=month(today()),average(dataset),"")

Think i'm going about it completely wrong!

Can anyone help?

Thanks in advance :D

[tom1977]

try array formula from attachment