7.5.1 Climate Data SourceHere comes the important part:
Choose an option for the source of the climate data to be used for EcoDesigner STAR.
• Download from StruSoft Climate Server: With this option, climate data are obtained from the StruSoft climate website, at http://climate.vipenergy.se.
All StruSoft climate data are created from NCEP Reanalysis data provided by the NOAA-CIRES Climate Diagnostics Center, Boulder, Colorado, USA, from their website at http://www.cdc.noaa.gov/.
• Use ASHRAE IWEC, TMY, WTEC2 file: Click Browse to select and import data from analytic weather files obtained from an external source (from open source e.g.So you should be using analytical weather data (as recommended by Graphisoft) available from various sources (the above link is free, or open-source data) because that is the most accurate. As it seems the data you downloaded from the Strusoft Server is not accurate.
Note: Use analytic (“ideal year”) weather data whenever possible, as it usually represents a given location's climate better than climate data recorded in any particular year.