Soil Moisture Levels Increased in Early May, Illinois State Water Survey

ISWS Press Release

For Immediate Release May 18, 2015
Soil Moisture Levels Increased in Early May
Jennie Atkins, Ph.D. - (217) 333-4966,
Lisa Sheppard - (217) 244-7270,

CHAMPAIGN, Ill. – Soil moisture increased slightly throughout the state the first half of May, according to Jennie Atkins, Water and Atmospheric Resources Monitoring (WARM) Program Manager at the Illinois State Water Survey, Prairie Research Institute, University of Illinois.

Soil Moisture map for May 15th, 2015

Soil moisture levels at 2 inches averaged 0.35 water fraction by volume (wfv) on May 15, an increase of 26 percent in the first two weeks of the month.  The largest change was in west central Illinois where 2 inch moisture levels increased 68 percent over the same time period.  Similar, though slighter, changes were observed at 4- and 8-inch depths.

Rain from the weekend had no significant impact, on average, on soil moisture levels.  However, significant increases were seen at several locations.  The Dixon Springs Agricultural Center in southern Illinois recorded 2.66 inches of rain May 15–17, which resulted in a 50 percent increase in soil moisture at 2 inches.

Moisture levels remained high at 20 inches and greater, averaging 0.43 wfv at 59 inches.

Soil temperatures were near normal for the first half of May with a statewide average of 73.2 degrees F on May 17 at 2 inches under bare soil.  Temperatures were slightly lower at deeper depths with averages of 70.6 degrees at 4 inches under bare soil, 68.7 degrees at 4 inches under sod, and 66.1 degrees at 8 inches under sod.

The Illinois State Water Survey's WARM Program collects hourly and daily weather and soil information at 19 stations across the state.  Daily and monthly summaries can be found at the WARM website ( and in the Illinois Water and Climate Summary ( 

Maps of soil temperatures and moisture levels can also be found at the WARM website.


The Illinois State Water Survey at the University of Illinois at Urbana-Champaign, a division of the Prairie Research Institute, is the primary agency in Illinois concerned with water and atmospheric resources.

| News |

Illinois State Water Survey

2204 Griffith Dr
Champaign, IL 61820-7463

Terms of use. Email the Web Administrator with questions or comments.

© 2018 University of Illinois Board of Trustees. All rights reserved.
For permissions information, contact the Illinois State Water Survey.
Site Map