We've had a fairly typical Spring in Oklahoma (last year the wettest year on record, 2006 the 2nd driest ever)
Typical for us is warm one day, cold the next, with a high chance of severe weather most every afternoon. We get a rain about every other week, either a gully washer, or an all day mist (this depends on whether it's a warm day or cold). It is not at all uncommon for the low temp and high for the day to experience a 40 degree shift.
Here it is May 19th and today will be the first in 2008 to top 90. Right now it's an even 100 degrees. Looks like Summer's here. ENJOY!!