Areal averaged sounding

All-
I am using WRF model data which has variables:
T[time,level,x,y]

If I want to take an areal average over a time interval, how might I do
that?

I tried to use Numeric.average:
t = t[:,0:34,:,:]
! this statement averages over time
repeating the above:
t =t[0:34,:,:]
#averages over vertical level!

But I do not want it to do that.
Is there any other way to compute an areal average leaving the vertical
levels alone?

-- 
James Correia Jr.
Ph.D. Candidate in Agricultural Meteorology
Former President: ISU Graduate Meteorology Club
Dept. of Agronomy, Iowa State University
*********************************************
Email: jimmyc_at_iastate.edu
Phone: 515-294-9870
Web: http://bruce.agron.iastate.edu/jimmyc/
ISU GMC: http://www.stuorg.iastate.edu/gmc/
*********************************************
"There is a difference between knowing the path and walking the path"
-"Morpheus"
"Wisdom. Strength. Courage. Generosity. Each of us are born with one of
these. We must find the other three inside of us."
from "Into the West"
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