Typical meteorological year (TMY) is a collation of selected weather data for a specific location, listing hourly values of solar radiation and meteorological elements for a one-year period.
The third, and latest TMY collection (TMY3) was based on data for 1020 locations in the USA including Guam, Puerto Rico, and US Virgin Islands, derived from a 1976-2005 period of record where available, and a 1991-2005 period of record for all other locations.
[1] To account for the recent changes in climate, a set of updated TMY collection called "TMYx" has been published by the creators of EnergyPlus software covering the period from 2006 and 2021 for about 16,000 locations globally.
[2] Commercial software packages supporting simulations using TMY data include TRNSYS, PV*SOL,[3] PVscout,[4] nPro[5] and PVsyst.
On the other hand, an advanced, comprehensive, and free simulation package developed under funding from the US Department of Energy called EnergyPlus also reads TMY3 data files, and a large number of these are available at no cost from their website.