Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Barometric Pressure Site
Name: bill
Status: other
Age: 30s
Location: N/A
Country: N/A
Date: 2000-2001

is there a web site that might have the barometric pressure for each day for the last year or so (for chicago area)?

Yes, this is easy - see the Argonne National Laboratory Environmental Research Division, Atmospheric Section data page at (the ANLMET must be in caps). There you will find the last several years of data. Click on the 2000 link, for instance, and you will find links for each month. Go into one of those links and you will find data for each day of the month. At the very bottom of the listing are two summary tables, one with hourly averages and the very last one with daily averages (which is what you probably want). The pressure (title BAROM PRESS) is in kilopascals (kPa). Multiply by 10 to get millibars, or multiply by 0.2953 for inches of mercury.

Dr. Cook

Click here to return to the Weather Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (, or at Argonne's Educational Programs

Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory