Climatic Information
ASHRAE Technical Committee 4.2


Upcoming TC Meetings

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TBD 1900-RP PMS (virtual)
“Using simulated weather data with sparse measured data to produce hourly weather files and calculate design conditions”
TBD 1923-RP PMS (virtual)
“Prepare climatic design conditions for the 2025 ASHRAE Handbook — Fundamentals and ASHRAE Standard 169”
TDB Handbook (virtual)
TBD 1874-RP PMS (virtual)
“Addition of Roof Top Temperature Information to the Climatic Design Conditions chapter of the ASHRAE Handbook”
TBD Research (in-person and virtual)
TBD Program (in-person and virtual)
TBD Forum 2: What (New) Weather/Climatic Data Do ASHRAE Members Need? 
TBD Main meeting (in-person and virtual)

• All times are Eastern Standard Time (UTC-5:00).

• Conference Schedule:

• Meetings prior to the Conference will be held remotely (virtual).

• For remote participation information, please visit the Meetings page.

Committee Chair

Dr Carrie A Brown

Committee Scope

TC 4.2 identifies, researches, analyzes, and disseminates climatic data for design of sustainable built environments.


Upcoming Society Conferences

ASHRAE 2023 Annual Conference
June 24-28, 2023
Tampa, FL

Additional Information

Do you want to be kept up-do-date about activities of TC 4.2, even if you are not a member? Ask to join the TC 4.2 Google Groups email list-serve by sending a request to the Webmaster or to the Chair.

ASHRAE RP-1847, “Updating Climatic Design Information for the 2021 ASHRAE Handbook, Standard 169, and the Handbook of Smoke Control Engineering", is now complete. Please check for the data in Chapter 14 of the Handbook - Fundamentals, and in the new online Weather Data Viewer, available at Please refer to the ASHRAE Climate Data Center for all these products. The map of all 9,237 sites for which climatic design information is available is available through the following link: