Issue 10, June 28, 2013

Modified Growing Degree Days (Base 50° F, March 1 through June 27)

Station Location

Actual Temperature

Historical Average  
(11 year)

One-Week Projection

Two-Week Projection

Freeport

983

961

1138

1293

St. Charles

985

907

1134

1282

DeKalb

1016

1024

1173

1327

Monmouth

1131

1087

1290

1149

Peoria

1152

1143

1321

1492

Champaign

1219

1181

1393

1569

Springfield

1304

1274

1487

1673

Brownstown

1292

1350

1478

1667

Belleville

1367

1363

1551

1739

Rend Lake

1470

1475

1663

1857

Carbondale

1425

1392

1605

1791

Dixon Springs

1443

1465

1626

1814

Insect development is temperature dependent. We can use degree days to help predict insect emergence and activity.  Home, Yard, and Garden readers can use the links below with the degree day accumulations above to determine what insect pests could be active in their area.

GDD of Landscape Pests

GDD of Conifer Pests

Degree day accumulations calculated using the Illinois IPM Degree-Day Calculator (a project by the University Of Illinois Department Of Crop Sciences and the Illinois Water Survey).

Author:
Kelly Estes

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