Revit’s weather settings

Recently I’ve been attempting to transcode some my environment analysis Grasshopper scripts that utilise Ladybug into Dynamo. Ladybug allows you to import standard EnergyPlus Weather files (*epw) which can be downloaded from the US Department of Energy website. During the process, you are able to see which weather station the file has been taken from.

EnergyPlus_1600x800

This got me thinking about which weather information Revit uses. After a little bit of Google research I discovered that Autodesk Revit, Vasari, and Green Building Studio all access climate data through a cloud server called the Autodesk Climate Server. This server compiles data from both physical weather stations (at airports) and from meteorological simulations. But nowhere within Revit does it show which weather station is it using.

Revit_SunSettingsNoUser_1600x800

So I dug a little deeper and came across the Revit help file which states that Autodesk Subscription members have access to a list of weather stations for selecting weather data to use in analyses. Weather data is available worldwide at 12km intervals, with the exception of the United States 2004 data, which are available at 20km intervals. By logging into Revit as a subscription member and reopening the location setting, the site location map now displays multiple weather stations to choose from.

Revit_SunSettingsWithUser_1600_800

These represent the 8 weather stations that are closest to the specified project location. The same 8 weather stations are also displayed  on the Weather Stations list. By default, the closest weather station is defined as the project weather station. By placing the cursor over a weather station map pin, it will display a tooltip with the following weather station information: station ID, year for which the most recent weather data is available, latitude, longitude, distance from project location, and elevation. To change the project weather station, click an alternate weather station map pin, or select a different weather station on the Weather Stations list.

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