Map of Weather Stations with First & Last Frost Dates and Minimum Temperatures
Find Your Frost Dates
The map below shows US weather stations. If you click on a station it will show a card like this:
The frost dates are straightforward--month/day--and represent the average date during 1981-2010 when the frost occurred(last frost in spring, first frost in fall). The letters represent details of how the numbers are calculated. The winter temperature minimum(months of december, january and february) is expressed in tenths of degrees fahrenheit--so 293=29.3 fahrenheit.