This tool analyzes several variables related to minimum temperature for up to five counties at a time. The following variables are analyzed for the contiguous U.S. from 1951 to the near present:
- Freeze Days – number of days where the minimum temperature was less than or equal to 32°F
- Coldest Minimum Temperature – coldest county-wide minimum temperature annually
- Warmest Minimum Temperature – warmest county-wide minimum temperature annually
- Minimum Temperature Threshold – the number of days with greater than or equal to OR less than or equal to a user-defined temperature