Based on the location selected in the project information page, the weather file closest to the project site is selected. You can see the map of the weather locations being used in cove.tool here.
loadmodeling.tool integrates with the wider cove.tool platform to provide seamless connection between early-stage energy analysis and detailed room-by-room load modeling and system design. It also gives you the ability to upload custom weather files. You will need an epw file (required), ddy file (recommended) and a stat file (recommended).
Under the settings panel in the navigation tab of loadmodeling.tool you will see 2 sections - Project Settings and Weather Settings. The weather file is pre-populated based on the location set in the project information page for early-stage analysis.
Click on the text bar with the weather file name > it should automatically open a folder tab > search for the location on your PC where you have the weather files saved > select the 3 files (epw, ddy, stat) > click on open > select upload on the weather settings panel >your weather data will be updated.
NOTE: You only need an epw file to update the location but the only thing that will update is the Data Source, Weather Station and Period of Record. All the other columns will use the default location for the remaining information. For more accurate data it is advised to upload all 3 files - epw, ddy and stat.