JA2.1      Weather Data - General

All energy calculations used for compliance with the Standards must use the Commission's sixteen (16) official hourly weather files or modifications of these files adapted for the design day conditions in Table 2-3. The modified weather files make the HVAC sizing and energy calculations more realistic for energy compliance simulations. These files are available in electronic form from the Commission in CSV (Comma Delimited File) format, TMY2 (Typical Meteorological Year) format and EPW (EnergyPlus) format.

Each weather file contains data on a variety of ambient conditions such as:

(a)  Dry bulb temperature

(b)  Wet bulb temperature

(c)  Wind speed and direction

(d)  Direct solar radiation

(e)  Diffuse radiation

Table 2-1 –California Standard Climate Zone Summary

Note: The alternative weather files modified for local design conditions use the specific latitude, longitude and elevation of the selected city.

JA2.1.1 Counties and Cities with Climate Zone Designations

The following pages are a listing of California cities, ZIP codes, and counties with a climate zone designation for each. This information represents an abridged version of the Commission publication California Climate Zone Descriptions which contains detailed survey definitions of the 16 climate zones.

New ZIP codes listing approved by the Executive Director will be published as an addendum to this appendix for compliance. Addenda may consist of additional rows or columns to existing tables.

Note to User:  Table 2-2 is a large table.  The links below open very slowly…please be patient.

Link to Table 2-2 - Cities and Counties with Climate Zone Designations