Weighted Irradiance Data Download
Photosynthetically Active Radiation (PAR)
Photosynthetically Active Radiation (PAR) irradiance is an irradiance in Watts per square meter over the 400 to 700 nanometer spectral range. It is measured with a separate PAR pyranometer sensor.

Please note we now have an FTP Access, to download site/sites, year/years of data.

Valid date range for location Alaska, Fairbanks, AK01, AK02 is from Tue Jun 24 22:09:00 GMT+00:00 2003 to Tue Mar 28 00:00:55 GMT+00:00 2017

Location and Time User Inputs
  • Climatological Sites
  • Alaska,Fairbanks
  • Arizona,Flagstaff
  • California,Davis
  • California,Holtville
  • Colorado,Lamar
  • Colorado,Nunn,Pawnee
  • Colorado,Steamboat Springs
  • Florida,Homestead
  • Georgia,Griffin
  • Hawaii,Waimea,Mauna Loa
  • Illinois,Bondville
  • Indiana,West Lafayette
  • Louisiana,Baton Rouge
  • Maine,Presque Isle
  • Maryland,Beltsville
  • Maryland,Queenstown
  • Michigan,Pellston
  • Minnesota,Grand Rapids
  • Mississippi,Starkville
  • Montana,Poplar
  • Nebraska,Mead
  • New Mexico,Las Cruces
  • New York,Geneva
  • New Zealand,Alexandra
  • North Carolina,Raleigh
  • North Dakota,Fargo
  • Oklahoma,Billings
  • Ontario,Toronto
  • Saskatchewan,Regina
  • Texas,Houston
  • Texas,Panther Junction,Castolon site end 12-2014
  • Texas,Panther Junction,K-Bar site opened 12-2014
  • Texas,Seguin
  • Utah,Logan
  • Vermont,Burlington
  • Washington,Pullman
  • Wisconsin,Dancy
  • Long Term Research Sites
  • Louisiana,Baton Rouge,SU-Ag
  • Short Term Experimental Research Sites
  • Colorado,Fort Collins,CO22
  • Colorado,Nunn,CO04
  • Colorado,Nunn,CO06
  • Florida,Gainesville,Portable,FL99
  • Indiana,West Lafayette,Portable,IN99
  • New York,Geneva,Portable,NY99