1. NWS Cooperative Network
2. Custom Date Duration Charts

With this application, you can total a parameter of your choice over a duration of your choice. The resulting data is presented graphically as well as textually for use in a GIS. The end date is inclusive to the data presented. The raw daily data used for this application can be downloaded from here.

Available State:	Select Parameter:	Year	Month	Day
Alabama Long Term Climate Sites Alaska Long Term Climate American Somoa Long Term Climate Sites Arizona Long Term Climate Sites Arkansas Long Term Climate Sites California Long Term Climate Sites Colorado Long Term Climate Sites Connecticut Long Term Climate Sites Delaware Long Term Climate Sites District of Columbia Long Term Climate Sites Florida Long Term Climate Sites Georgia Long Term Climate Sites Guam Long Term Climate Sites Hawaii Long Term Climate Idaho Long Term Climate Sites Illinois Long Term Climate Sites Indiana Long Term Climate Sites Iowa Long Term Climate Sites Kansas Long Term Climate Sites Kentucky Long Term Climate Sites Louisiana Long Term Climate Sites Maine Long Term Climate Sites Maryland Long Term Climate Sites Massachusetts Long Term Climate Sites Michigan Long Term Climate Sites Minnesota Long Term Climate Sites Mississippi Long Term Climate Sites Missouri Long Term Climate Sites Montana Long Term Climate Sites Nebraska Long Term Climate Sites Nevada Long Term Climate Sites New Hampshire Long Term Climate Sites New Jersey Long Term Climate Sites New Mexico Long Term Climate Sites New York Long Term Climate Sites North Carolina Long Term Climate Sites North Dakota Long Term Climate Sites Ohio Long Term Climate Sites Oklahoma Long Term Climate Sites Oregon Long Term Climate Sites Pennsylvania Long Term Climate Sites Puerto Rico Long Term Climate Rhode Island Long Term Climate Sites South Carolina Long Term Climate Sites South Dakota Long Term Climate Sites Tennessee Long Term Climate Sites Texas Long Term Climate Sites Utah Long Term Climate Sites Vermont Long Term Climate Sites Virginia Long Term Climate Sites Virgin Islands Long Term Climate Washington Long Term Climate Sites West Virginia Long Term Climate Sites Wisconsin Long Term Climate Sites Wyoming Long Term Climate Sites	Growing Degree Days (base=32) Growing Degree Days (base=41) Growing Degree Days (base=46) Growing Degree Days (base=48) Growing Degree Days (base=50) Growing Degree Days (base=51) Growing Degree Days (base=52) Cooling Degree Days (base=65) Heating Degree Days (base=65) Precipitation Stress Degree Days (base=86) Minimum Temperature Maximum Temperature	1893189418951896189718981899190019011902190319041905190619071908190919101911191219131914191519161917191819191920192119221923192419251926192719281929193019311932193319341935193619371938193919401941194219431944194519461947194819491950195119521953195419551956195719581959196019611962196319641965196619671968196919701971197219731974197519761977197819791980198119821983198419851986198719881989199019911992199319941995199619971998199920002001200220032004200520062007200820092010201120122013201420152016201720182019202020212022202320242025	JanFebMarAprMayJunJulAugSepOctNovDec	12345678910111213141516171819202122232425262728293031
		to inclusive date:	JanFebMarAprMayJunJulAugSepOctNovDec	12345678910111213141516171819202122232425262728293031

*Note: Only a sub-sample of stations are plotted on the map due to space restrictions. The small four digit label is the station identifier used in the data listing below (without the 2 character state identifier included).

Data Listing

# IEM Estimated COOP Accumulations (start: 2025-05-01 to inclusive date: 2025-01-10)
# Download From: https://mesonet.agron.iastate.edu/GIS/apps/coop/gsplot.phtml
# Download Date: 11 Jan 2025
# CLIM_ values are based on climatology 1951-today
# Data Contact: Daryl Herzmann akrherz@iastate.edu 515.294.5978
#-----------------------snip------------------
    ID,          StationName,  Latitude, Longitude,     GDD50,     GDD48,     SDD86,    PRECIP,CLIM_GDD50,CLIM_GDD48,CLIM_PRECIP,  MAX_TEMP,  MIN_TEMP,     CDD65,     HDD65,CLIM_CDD65,CLIM_HDD65

You should be able to 'copy & paste' this raw data listing into a simple text editor and save the data file on your machine. Most GIS systems can then import this dataset as a layer. You may have to omit the commented lines (#) if your GIS has trouble importing the data.