Why it makes sense to eat what is in season!
Not only is it usually cheaper but it is usually local as well. Buying local produce is in most cases a great choice to help local growers and you know its fresh, farm to market.
Saying this it is still wise to go as organic as you can possibly afford, as this is actually the healthiest choice. Some people might be misguided that a farmers market or local produce sign means organic, think again. Our earth where produce is grown has become depleted over many years of over use and none environment friendly procedures. A combination of chemical fertilizers, pesticides and herbicides are used regularly over fresh produce to get that perfect look demanded by the public. You ask how I would know this, I'm married to an ex- market gardener, who's father was a market gardener as well. I'm not trying to put you off of eating fruit and vegies,, for sure not, just know what you buy.
No matter where I buy my F&V as soon as I get home I fill a large container or my sink with cold water and put in 1/2 cup of white vinegar, at lease I know i'm removing anything that is on the out side.