Q.Frost Dates & Planting Timing
What is a microclimate and how does it affect my frost dates?
A.
A microclimate is a small area where local conditions (elevation, slope, vegetation, water, structures) produce temperatures different from the surrounding region. Microclimates routinely shift frost dates by 1-3 weeks within a few hundred yards. South-facing slopes warm faster; valley bottoms frost earlier; urban areas frost later.
Frost-date pages explain how to read station data as a regional anchor, then adjust for your microclimate.