I found some maps of the NSists' electoral share before Hitler came to power in Jan 1933:



July 1932 results:
NSDAP 37
SDP 22
KPD (Communists) 14
Centre 12
DVNP 6

In November 1932:





NSDAP 33 (-4)
SPD 20 (-1)
KPD 17 (+2.5)
Centre 12
DVNP 8 (+2.5)

Finally, Mar 1933, after Hitler had become chancellor:



Two questions arising from this:
- Why did NSists do best in Prussia, not their origin point (Munich?)
- Why did Protestants support them much more than Catholics? For instance, in Koeln-Aachen, the NSDAP won only 17% of the vote. http://www.wahlen-in-deutschland.de/wrtwkoelnaachen.htm