Issue 12, July 26, 2013

Modified Growing Degree Days (Base 50° F, March 1 through July 25)

Station Location

Actual Total

Historical Average   (11 year)

One-Week Projection

Two-Week Projection

Freeport

1617

1592

1775

1927

St. Charles

1615

1510

1764

1905

DeKalb

1622

1647

1773

1917

Monmouth

1793

1733

1952

2103

Peoria

1830

1835

2000

2164

Champaign

1912

1890

2087

2253

Springfield

2037

2020

2219

2396

Brownstown

1986

2107

2172

2351

Belleville

2082

2117

2265

2444

Rend Lake

2210

2258

2403

2588

Carbondale

2121

2137

2306

2484

Dixon Springs

2136

2221

2324

2505

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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