Climatic Data

ME Design is designed for use in both the United States and Canada and their possessions. Climatic data for these geographic areas is required by ME Design. File archives containing this data can be downloaded here.

Climatic data is provided in US Customary format and SI format.

*Climate files are now generated from the NARR and MERRA data sets.

MERRA Climatic Data

MERRA climatic data is now available to download from here. A login is currently needed for accessing and downloading the data. It will no longer be needed after Jan. 2018.

NARR Climatic Data

Standard Files

Educational Files

Climatic Data archives contain ".hcd" files. These data files must be extracted from your chosen archive and manually placed into a specific folder on the system in which ME Design has been installed.

The specific folder location depends on (a) whether your chosen climate data is US Customary or SI and (b) whether your ME Design system is using 32-bit or 64-bit Windows.

Folder location for data files when climate data (v2.5 and above, v2.5 coming soon):

32-bit & 64-bit Windows (US): C:\ProgramData\AASHTOWare\ME Design\HCD\
32-bit & 64-bit Windows (SI): C:\ProgramData\AASHTOWare\ME Design\HCD_SI\

Folder location for data files when climate data is US Customary (v2.3 and previous):

32-bit Windows: C:\Program Files\AASHTOWare\ME Design\HCD\
64-bit Windows: C:\Program Files (x86)\AASHTOWare\ME Design\HCD\

Folder location for data files when climate data is SI (v2.3 and previous):

32-bit Windows: C:\Program Files\AASHTOWare\ME Design\HCD_SI\
64-bit Windows: C:\Program Files (x86)\AASHTOWare\ME Design\HCD_SI\

Area-Specific Selection of Climatic Data

File archives corresponding to specific states, provinces, and territories are also available for download. (Only standard files are available in this format --- not educational files.)

Step 1 - Unit system of climatic data

Choose whether you'd like climatic data with SI units or with US Customary units:

Step 2 - Area of climatic data

Select an area from the drop-down list or click an area on a map below to immediately download climatic data specific to that area. You may select or click on as many areas as you like. You can zoom and pan on both maps for easier selection.

Note: United States territories must be selected from the drop-down list.

Option 1 - Select a listed area

Option 2 - Click a mapped area

United States