Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question

Calvin's profile - activity

2025-07-27 20:14:00 -0500 commented question Use weather converter to convert TMY3 to epw and ddy

It's included in the energyplus installation. Simply installing energyplus and you shall see it in preprocess folder.

2025-07-24 04:21:19 -0500 received badge  Supporter (source)
2025-07-24 02:47:40 -0500 marked best answer Use weather converter to convert TMY3 to epw and ddy

Hi, I'm trying to use weather converter to convert TMY3 file which is in csv format to epw and ddy. I read the documents Auxiliary Programs and wrote the .def to adapt the format but I keep got date error during the process. My energyplus version: 25.1 Weather converter: 8.1.0 My def file:

&wthdata
NumInHour = 1
InputFileType = 'CUSTOM'
InFormat = 'DELIMITED'
DataElements = Date,Time,ExtHorRad,ExtDirRad,GloHorRad,ignore,ignore,DirNorRad,ignore,ignore,DifHorRad,ignore,ignore,GloHorIllum,ignore,ignore,DirNorIllum,ignore,ignore,DifHorIllum,ignore,ignore,ZenLum,ignore,ignore,TotSkyCvr,ignore,ignore,OpaqSkyCvr,ignore,ignore,DryBulb,ignore,ignore,DewPoint,ignore,ignore,RelHum,ignore,ignore,Atmos_Pressure,ignore,ignore,WindDir,ignore,ignore,WindSpd,ignore,ignore,Visibility,ignore,ignore,Ceiling_Hgt,ignore,ignore,Precip_Wtr,ignore,ignore,Aerosol_Opt_Depth,ignore,ignore,Albedo,ignore,ignore,Liq_Precip_Depth,Liq_Precip_Rate,ignore,ignore
DataUnits = 'mm/dd/yyyy','hh:mm','Wh/m2','Wh/m2','Wh/m2','x','x','Wh/m2','x','x','Wh/m2','x','x','lux','x','x','lux','x','x','lux','x','x','Cd/m2','x','x','tenths','x','x','tenths','x','x','C','x','x','C','x','x','%','x','x','Pa','x','x','deg','x','x','m/s','x','x','m','x','x','m','x','x','cm','x','x','{.001}','x','x','{.01}','x','x','mm','hr','x','x'
DataConversionFactors = 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,100,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
DelimiterChar = ' '
DateSeparator = '/'
/

My real data in date field:

01/01/2004

My .audit file:

Note ** Definitions taken from associated "def" file.
Warning ** Did not find WMO for matching with Design Conditions, looking for WMO= 46692
Custom File Processing Details
Custom File, Number of Fields=  68
Delimited input, Delimiter Character=" "
Input Name  Skip Field (t/f)    Used by EnergyPlus  Conversion Factor   Field (from) First Record (before conversion    minimum value   maximum value   missing value
date    F   c   1.000   [1/]    N/A N/A -999999.0
Severe ** Error in Date field input, for Custom file=c:\xxxx\xxxx\downloads\466920_tmy3_csv\466920_tmy3_csv\test.csv
Invalid Date field specification= mm/dd/yyyy
Valid date fields are: "mm/dd/yyyy" or "mm/dd/yy" or "m/d/y" or "yyyy/mm/dd" or "yy/mm/dd" or "y/m/d" or "dd/mm/yyyy" or "dd/mm/yy" or "d/m/y"

How can I fix it?

2025-07-24 02:47:40 -0500 received badge  Scholar (source)
2025-07-21 09:38:32 -0500 received badge  Student (source)
2025-07-21 09:31:32 -0500 asked a question Use weather converter to convert TMY3 to epw and ddy

Use weather converter to convert TMY3 to epw and ddy Hi, I'm trying to use weather converter to convert TMY3 file which