Index to Degree-Day Data and Maps of USA
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These maps are calculated daily using the GIS GRASS 5.4, and are based on 1) near-real time temperature data from 12,000+ AgriMet, HydroMet, National Weather Service, RAWS, Snotel, and weather stations from dozens of other networks, 2) historical average temperature data (1971-2000 Normals) from the National Climate Date Center (clim84), 3) PRISM monthly max and min temperature maps, and 4) corrections based on inverse-distance squared interpolations of differences between PRISM map-based and real-time degree-day calculations. See More info. on methodology for creating DD maps. Also try out our Degree-day Mapping Calculator for control over thresholds, calculation method, dates, and mapping options.
Suggestions for Use
[IPM Weather/Degree-Days Home] [Intro] [US DD Mapmaker] [DD Models and Calculator] [Links]