March 15 is the average last frost for my area. I usually cover mine with milk jugs to protect them from any chill we might get. So far it's worked well for us.
It was pretty cool this morning, mid 30's, but warmed up to mid 60's by this afternoon. I raked the leaf mulch back on a couple of beds to let the sun warm up the dirt a bit. Hoping to plant tomatoes this next week.