Original post from The Cheap Vegetable Gardener.
There was a discussion in comments on my previous average last frost post on how to determine an accurate last frost. A great point was made by Daphne where every garden can have its own microclimate so the date you find online or in a book could be many weeks off for your microclimate in neighborhood.
To be able to predict your last frost date accurately it takes some history, if you have lived in your current residence and happened been capturing your temperature data accurately by memory or paper you may the information to predict your last frost date.
For people that are relatively new to their residence, like myself, I felt there I had very little information to determine an accurate prediction of my last frost date. This was until I remembered Weather Underground which logs results of schools or private individual that register their weather stations.
Read the rest of this post HERE.