IPCC DDC Baseline Climate Data
http://ipcc-ddc.cru.uea.ac.uk/ddc_visualisation.html
World Radiation Data Centre
Baseline Surface Radiation Network (BSRN)
World Radiation Monitoring Center (WRMC)
National Climatic Data Center (USA)
Meteonorm (commercial):
http://www.meteotest.ch/en/mn_home?w=ber
International Solar Irradiation Database, U. Massachusetts-Lowell:
http://energy.caeds.eng.uml.edu/solbase.html
NASA Surface Meteorology and Solar Energy:
http://eosweb.larc.nasa.gov/sse/
interfaces to RETScreen free modelling program:
http://www.retscreen.net/
SeaWiFS Surface Solar Irradiance:
http://www.giss.nasa.gov/data/seawifs/
International Satellite Cloud Climatology Project:
Australian Solar Radiation Data Handbook and AUSOLRAD (commercial):
https://anzses.sslaccess.com/Bookshop.html
Bureau of Meteorology
http://www.bom.gov.au/sat/solrad.shtml
http://www.bom.gov.au/climate/averages/
http://www.bom.gov.au/climate/averages/climatology/sunshine_hours/sunhrs.shtml
ANUCLIM:
http://cres.anu.edu.au/outputs/climatesurfaces/creswww.pdf
http://cres.anu.edu.au/outputs/anuclim.html
UNSW Centre for PV Engineering:
Opportunities for the Use of Building Integrated Photovoltaics in NSW
Muriel Watt, John Kaye, Dean Travers, Iain MacGill
Photovoltaics Special Research Centre, UNSW
Deo Prasad, P.C.Thomas, Liz Fox, SOLARCH, UNSW
Serryn Jansen, Allen, Allen & Hemsley.
Graphics of Energy Production
(kWh/m^2/day) as a Function of Orientation and Tilt
Angle for Canberra: Annual and by Month.

Annual January February March April May June July August September October November December
Satel-Light:
http://www.satel-light.com/core.htm
Helioclim:
http://www.helioclim.net/index.html
SoDa:
European Solar Radiation Atlas
http://www.ensmp.fr/Fr/Services/PressesENSMP/Collections/ScTerEnv/Livres/atlas_tome1.htm
http://www.ensmp.fr/Fr/Services/PressesENSMP/Collections/ScTerEnv/Livres/atlas_tome2.htm
http://www.weather.gov.hk/wxinfo/climat/normals.htm
U. Wisconsin Solar Energy Lab:
http://sel.me.wisc.edu/trnsys/
Regional:
NREL:
Integrated Surface Irradiance Study:
http://www.atdd.noaa.gov/isis.htm
References:
J. C. Lam and D. H. W. Li, "Study of solar radiation data for Hong Kong," Energy Conservation & Management, vol. 37, pp. 343-351, 1996.
T. Lee, D. Oppenheim, and T. J. Williamson, Australian Solar Radiation Data Handbook. Canberra: Energy Research and Development Corporation, 1995.
G. O. Lof, J. A. Duffie, and C. O. Smith, World Distribution of Solar Radiation. Madison: Solar Energy Laboratory, University of Wisconsin, 1996.
J. D. Garrison, "A program for calculation of solar energy collection by fixed and tracking collectors," Solar Energy, vol. 73, pp. 241-255, 2002.
J. Page, M. Albuisson, and L. Wald, "The European Solar Radiation Atlas: A valuable digital tool," Solar Energy, vol. 71, pp. 81-3, 2001.
R. N. Chapman, "The synthesis of solar radiation data for sizing stand-alone photovoltaic systems," presented at IEEE Photovoltaics Specialists Conference, 1990, pp. 965-70.
T. A. Reddy, The design and sizing of active solar thermal systems. Oxford: Clarendon Press, 1987 (Appendix D).
Sandia National Laboratories, Stand-alone photovoltaic systems. A handbook of recommended design practices (SAND87-7023), 1991.
M. Nunez, "Satellite estimation of regional solar energy statistics for Australian capital cities," Bureau of Meteorology Meteorological Study No. 39, Feb. 1990.
W. Marion and R. George, "Calculation of solar radiation using a methodology with worldwide potential," Solar Energy, vol. 71, pp. 275-83, 2001.
H. Power, "Estimating clear-sky beam irradiation from sunshine duration," Solar Energy, vol. 71, pp. 217-24, 2001.