Local Climatological Data Summary: Decatur, Illinois, 1901-1990

Bryan, Audrey A.; Armstrong, Wayne

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Description

Title

Local Climatological Data Summary: Decatur, Illinois, 1901-1990

Author(s)

• Bryan, Audrey A.
• Armstrong, Wayne

Issue Date

1991

Keyword(s)

• Decatur, Illinois
• Macon County, Illinois
• climatology
• temperate continental climate

Abstract

Decatur (Macon County) has a temperate continental climate, dominated by maritime tropical air from the Gulf of Mexico from about late April through mid-October. Gulf air generally supports relative humidities of about 50% during the day and 85% at night. During these months, there are occasional, brief interruptions of drier, cooler air from the Pacific Ocean, but typically only last for a few days. During the remainder of the year, the Decatur area is dominated by Pacific Ocean air. Four to six times each winter, cold, dry air from the Canadian Arctic breaks south, bringing temperatures into the units or values even less than zero.

Publisher

Illinois State Water Survey

Series/Report Name or Number

ISWS Miscellaneous Publication MP-098-03

Type of Resource

text

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http://hdl.handle.net/2142/55583

Copyright and License Information

Copyright ... University of Illinois Board of Trustees. All rights reserved. This document is a product of the Illinois State Water Survey, and has been selected and made available by the Illinois State Water Survey and the University Library, University of Illinois at Urbana-Champaign. It is intended for research and educational use, and proper attribution is requested.

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