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The weather data provided in EnergyPlus weather format on this web site are derived from
18 sources:
*The CIBSE data are not available on this web site. See below for information about obtaining the CIBSE data.
Updated weather data for 16 California climate zones (CTZ2) for use to demonstrate compliance with Title 24 with approved building energy simulation programs. All 16 CTZ2 weather files are available for download in EnergyPlus weather format. The original source data is available from the California Energy Commission.
The 72 CWEC files contain hourly weather observations representing an artificial one-year period specifically designed for building energy calculations. All 71 locations in the CWEC data set are available for download in EnergyPlus weather format.
Produced by Numerical Logics in collaboration with Environment Canada and the National Research Council of Canada, the CWEC were derived using a methodology similar to the TMY2 (see below). CWEC hourly files represent weather conditions that result in approximately average heating and cooling loads in buildings. The National Energy Code of Canada requires the use of a CWEC file representative of a location when the performance path and customized design calculations are chosen as the means of building energy consumption compliance. The CWEC follow the ASHRAE WYEC2 (Weather Year for Energy Calculation 2) format and were derived from the Canadian Energy and Engineering Data Sets (CWEEDS) of hourly weather information for Canada from the 1953-1995 period of record. The CWEC are available from Environment Canada. The reference for the CWEC is:
Numerical Logics. 1999. Canadian Weather for Energy Calculations, Users Manual and CD-ROM. Downsview, Ontario: Environment Canada.
The CIBSE, in association with the (UK) Met Office has produced 'Test
Reference Years' and 'Design Summer Years' for 14 UK locations for use
with building energy simulation software. The data sets are available in
various formats, including EnergyPlus/ESP-r. These data are NOT available on
this web site. For further details, see:
www.cibse.org/index.cfm?go=publications.view&PubID=332&S1=y&L1=0&L2=0
Developed for use in simulating building heating and air conditioning loads
and energy use, and for calculating renewable energy utilization, this set of
270 typical hourly data weather files. These data were developed by Dr. Jiang Yi,
Department of Building Science and Technology at Tsinghua University and China
Meteorological Bureau. The source data include annual design data, typical
year data, and extreme years for maximum enthalpy, and maximum and minimum
temperature and solar radiation.
China Meteorological Bureau, Climate Information Center, Climate Data Office and
Tsinghua University, Department of Building Science and Technology. 2005. China
Standard Weather Data for Analyzing Building Thermal Conditions, April 2005.
Beijing: China Building Industry Publishing House, ISBN 7-112-07273-3 (13228).
http://www.china-building.com.cn.
Developed for use in simulating building heating and air conditioning loads
and energy use, and for calculating renewable energy utilization, this set of 57 weather files
is based on a 1982-1997 period of record with data obtained from the U. S. National Climatic
Data Center. These data were developed by Joe Huang of Lawrence Berkeley National Laboratory.
The original data set was created by Prof. ZHANG Qingyuan of Tsukuba University Japan, in
collaboration with Joe Huang of Lawrence Berkeley National Laboratory. Development of the original
typical year weather files is documented in:
Zhang Qingyuan and Joe Huang. 2004. Chinese Typical Year Weather Data
for Architectural Use (in Chinese). ISBN 7-111-14810-X. Beijing: China Machine
Press.
Available from: China Machine Press
No. 22 Baiwanzhuang Dajie
Beijing, CHINA 100037
Typical year file for Hong Kong originally in IWEC format spreadsheet jointly
developed by Dr TT Chow and ALS Chan of the City University of Hong Kong supported by a CERG
grant from the Research Grants Council of the Hong Kong Special Administrative Region of China.
Solar radiation measured from observatory station at 22.32 N, 114.17 E, 65m above mean sea level.
Developed for standards development and energy simulation by Joe Huang from data
provided by U. S. National Climatic Data Center for periods of record from 12 to 21 years, all ending in
2003. Joe Huang and Associates, Moraga, California, USA.
Developed for use with building energy performance simulation programs, this
set of 58 locations in India was created by the Indian Society of Heating, Refrigerating and
Air-Conditioning Engineers (ISHRAE) in TMY2 format. ISHRAE has kindly allowed DOE to make
these data available to EnergyPlus users.
The ISHRAE weather data are © 2005 Indian Society of Heating, Refrigerating and Air-Conditioning Engineers, New Delhi, India. www.ishrae.org.in All rights reserved as noted in the Copyright, License and Disclaimers (TXT 2 KB).
The IWEC are the result of ASHRAE Research Project 1015 by Numerical Logics
and Bodycote Materials Testing Canada for ASHRAE Technical Committee 4.2 Weather Information.
The IWEC data files are 'typical' weather files suitable for use with building energy simulation programs
for 227 locations outside the USA and Canada. All 227 locations in the IWEC data set are
available for download in EnergyPlus weather format.
The files are derived from up to 18 years of DATSAV3 hourly weather data originally archived at
the U. S. National Climatic Data Center. The weather data is supplemented by solar radiation estimated
on an hourly basis from earth-sun geometry and hourly weather elements, particularly cloud amount information.
The IWEC CD-ROM is available from ASHRAE.
The reference for the IWEC is:
ASHRAE. 2001. International Weather for Energy Calculations (IWEC Weather Files)
Users Manual and CD-ROM, Atlanta: ASHRAE
The Department of Energy has licensed the IWEC data from ASHRAE. Our license with ASHRAE allows DOE to:
- Distribute versions of the individual IWEC files in converted format suitable for EnergyPlus (EPW).
- Make the EnergyPlus versions of the IWEC files available to users at no cost via this EnergyPlus web site.
The IWEC source data are © 2001 American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), Inc., Atlanta, GA, USA. www.ashrae.org All rights reserved as noted in the License Agreement and Additional Conditions (TXT 3 KB).
Developed for use in simulating renewable energy technologies, this set of 66
weather files is based on a 1951-1970 period of record. The data were created by Professor Livio
Mazzarella, Politecnico di Milano, and is named in honor of Gianni de Giorgio. More information
on the data collection is available here in Italian (PDF 207 KB). Download Adobe Reader.
Two weather files for Portugal developed by Ricardo Aguiar of Instituto Nacional de
Engenharia, Tecnologia e Inovação (INETI). Synthetic data set based on spatially interpolation
of public climatic data published by Instituto de Meteorologia 1951-80 combined with INETI owned data
and other freely available data sources. INETI has granted DOE permission to distribute versions of the individual INETI files in converted format suitable for EnergyPlus (EPW) and make those files available to users at no cost via this EnergyPlus web site.
The INETI synthetic data are © 2005 Instituto Nacional de Engenharia, Tecnologia e Inovação, Lisboa, Portugal. www.ineti.pt All rights reserved as noted (TXT 1 KB).
Typical year weather files have been created for Tehran from weather data for 1992 through 2003 published by the Islamic Republic of Iran Meteorological Organization (IRIMO) for Tehran Mehrabad. Developed for standards development and energy simulation by Joe Huang, White Box Technologies.
Two weather files for Kuwait based on measured meteorological data for Kuwait International Airport and KISR's coastal weather station. Provided by KISR in spreadsheet format. The reference for the development of the KISR is:
Shaban, N. 2000. Development of Typical Meteorological Year for Kuwait. Kuwait Institute for Scientific Research, report KISR 5857, Kuwait.
RMY Australia Representative Meteorological Year Climate Files
Developed for the Australia Greenhouse Office for use in complying with Building Code of Australia. These data are licensed through ACADS BSG Ltd for use by EnergyPlus users. For use in any other
formats, users must contact ACADS BSG Ltd for licensing information.
The RMY data are © 2006 Commonwealth of Australia, Department of the Environment and Water Resources, Australia Greenhouse Office, Canberra, ACT, Australia. www.greenhouse.gov.au/buildings/code.html All intellectual property rights reserved).
Originally developed for use with Calener, a program for building energy labeling
in Spain, these weather files cover all 52 Spanish provincial capitals. Calener was developed by the
Grupo de Termotecnia of the Escuela Superior de Ingeneiros in Seville for the Spanish Government.
The weather files were synthetically generated using Climed (Portuguese software developed by Ricardo
Aguiar) from mean monthly data coming from the Spanish Meteorological National Institute. These weather
files were converted from the DOE-2 binary to EnergyPlus format and include constant wind speeds of 6.7 m/s.
For more information on these weather files, contact:
Professor Luis Pérez-Lombard
Escuela Superior de Ingenieros
The Solar and Wind Energy Resource Assessment (SWERA) project, funded by the United Nations Environment Program, is developing high quality information on solar and wind energy resources in 14 developing countries. Currently typical year hourly data are available for 156 locations in Belize, Brazil, China, Cuba, El Salvador, Ethiopia, Ghana, Guatemala, Honduras, Kenya, Maldives, Nicaragua, and Sri Lanka. The data are available from the SWERA project web site.
Weather data for Israel locations developed by Faculty of Civil and Environmental Engineering, Technion - Israel Institute of Technology, Haifa, Israel, from data provided by the Israel Meteorological Service.
Data for 1020 locations in the USA including Guam, Puerto Rico, and
US Virgin Islands, derived from a 1991-2005 period of record. All 1020 locations in the TMY3 data set are available for download in EnergyPlus weather format.
The TMY3s are data sets of hourly values of solar radiation and meteorological elements for a 1-year period. Their intended use is for computer simulations of solar energy conversion systems and building systems to facilitate performance comparisons of different system types, configurations, and locations in the United States and its territories. Because they represent typical rather than extreme conditions, they are not suited for designing systems to meet the worst-case conditions occurring at a location. The
source data are available for download from the National Renewable Energy Laboratory for download. The reference for the TMY3 is:
Wilcox, S. and W. Marion. 2008. User's Manual for TMY3 Data
Sets, NREL/TP-581-43156. April 2008. Golden, Colorado: National Renewable Energy Laboratory.
Data for 237 locations in the USA plus Guam and Puerto Rico, derived from a 1961-1990 period of record.
Only one TMY2 locations (Rock Springs, WY) was not updated by the newer TMY3 data
set and is available for download in EnergyPlus weather format.
Similar to the TMY3s, TMY2s are data sets of hourly values of solar radiation and meteorological elements for a 1-year period. Their intended use is for computer simulations of solar energy conversion systems and building systems to facilitate performance comparisons of different system types, configurations, and locations in the United States and its territories. Because they represent typical rather than extreme conditions, they are not suited for designing systems to meet the worst-case conditions occurring at a location. The data are available from the National Renewable Energy Laboratory for download or on CD. The reference for the TMY2 is:
National Renewable Energy Laboratory (NREL). 1995. User's Manual for TMY2s (Typical Meteorological Years), NREL/SP-463-7668, and TMY2s, Typical Meteorological Years Derived from the 1961-1990 National Solar Radiation Data Base, June 1995, CD-ROM. Golden, Colorado: National Renewable Energy Laboratory.
Data for 229 locations in the USA plus five locations in Cuba, Marshall Islands, Palau, and Puerto Rico, derived from a 1948-1980 period of record. Many of the locations in the TMY data set were subsequently updated by the
TMY3 and TMY2—the 13 TMY locations that do not duplicate TMY3 locations are available for download in EnergyPlus weather format.
Similar to the TMY3 and TMY2, the TMY are data sets of hourly values of solar radiation and meteorological elements for a 1-year period. Their intended use is for computer simulations of solar energy conversion systems and building systems to facilitate performance comparisons of different system types, configurations, and locations in the United States and its territories. Because they represent typical rather than extreme conditions, they are not suited for designing systems to meet the worst-case conditions occurring at a location. The data are available for purchase from the National Climatic Data Center. The reference for the TMY is:
National Climatic Data Center. 1981. Typical Meteorological Year User's Manual, TD-9734, Hourly Solar Radiation—Surface Meteorological Observations, May 1981. Asheville, North Carolina: National Climatic Data Center, U.S. Department of Commerce.
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