What type of assessment are you trying to carry out?
Important: You currently cannot purchase TRY or DSY files individually for specific zones. If you wish to buy only TRY or only DSY files, you must purchase them for all 28 zones. Alternatively, if you're interested in a single zone, you would need to purchase both the TRY and DSY files together for that zone.
There are two main data types available:
TRYs for energy assessments and,
DSYs for overheating assessments.
If you are carrying out another type of assessment, please ensure the CIBSE Weather Data is appropriate for your intended use.
2030s CIBSE Weather Data (2025 Release) are representative of the time period between 2019 - 2039. These should be used to assess current energy usage and overheating risk.
Future CIBSE Weather Data (2025 Release) contain weather data that cover two additional time periods. These consist of:
2050s representative of 2039 - 2059
2080s representative of 2059 - 2089
These are intended to be used for stress testing building designs for overheating risk and evaluating the future energy requirements of a building.
How many additional users will need access to the data you are purchasing?
License Information:
The price for data includes a single-user license.
If you purchase 14 additional user licenses (15 users total), you will automatically receive an Unlimited Users license at no extra cost.
It's cheaper to purchase all zones for this package.