I am looking for a degree day calculator that would cover all 50 states similar to the Cornell one at
http://climatesmartfarming.org/tools/csf-growing-degree-day-calculator/
Would be useful for fruit growers who want to determine which fruit are likely to grow and ripen in climates that have cool short growing seasons
I had tried using NOAA but it’s not set up to do this calculation
Cornell’s only cover a restricted NE area
Dennis
Kent, wa
I found this website that calculates Growing Degree Days among other things. And you can compare locations worldwide also, which was helpful for me to compare my location with Grimo Nut Nursery’s location to see if ultra northern pecans might be worth trying in the hot summer Yellowstone River Valley. I have a bit more Growing Degree Days than they do, substantially more Cooling Degree Days (a different website) but a shorter frost free season.
https://www.degreedays.net/ use this one for cooling degree days, pick average to get the five year average for your summer
It looks like you’re asking about decadal averages in particular locations. The term degree days may refer to that. Also it refers to timing insect-pest treatments during a given season. Here’s a site targeted at insect phenology.
It shows that not all growing degree-day (GDD) calculations are created equal. In fact, choosing the correct calculation requires a little study. On the other hand choosing the wrong calculation doesn’t make a lot of difference. What makes the difference is using truly local (and fairly accurate) temperature measurements. (Note that the models appear to be arranged alphabetically in the drop-down box, but they aren’t. You have to look sharp. I don’t believe that this site goes into GDD biofix offsets required by some insect-development models.)
For calculations based on back-yard hyper-local measurements, I recommend a back-yard weather station paired with Linux running on a personal computer. Use the WeeWX software suite with my Phenology extension.
I you’re into the python computer-programming language, you could extract the growing_degrees.py module from my Phenology tarball and print your own paper GDD table.