Illinois USA weather data
Illinois USA Weather Data, Plant Disease Risk and Degree-Day Models
METAR Network - other tables for IL include: All Networks, CWOP/APRS, HADS, RAWS, see our homepage.
Interactive degree-day maps
Illinois USA base 32 degree-days to date
Degree-day & Phenology Model Calculator
 Also try the full-featured calculator/DD model
Select model: 
Thresholds: lower: °F   upper: °F (or celsius °C:)
  Calc. method:
Start (biofix) date:   End date:   
 Forecast type:   
Statewide Disease Alert Maps: tomato-potato Smith late blight, Tomcast DSV, fire blight, soybean rust
Disease Alert Movies: fireblight: 2010 2011 2012 2013
Data table - to SORT click on headers:
# Location linked to
hourly weather,
plant disease models and
forecasts
using
"Mypest Page"
 
County
Re-
cent
data QA
Fore-
cast
based
virt
data
Nearby
station
based
virt
data

Station code,
links to
NWS recent
weather

Links to
NWS fore-
casts
 
Net-
work
Elev. (ft)
 
Lat./ Long.
(Dec. Deg.)
 
Max-min temperature data and degree-days
(click radio button to calc.)

10 yr
avgs

30 yr
avgs

nmme
fcast

cfs
fcast
1 Albertus Airport Stephenson
97
na
na
na
na
KFEP
map
digital
METAR
837
 42.24750
-89.58083
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
2 Aurora Muni Apt Kane
70
na
na
na
na
KARR
map
digital
METAR
705
 41.77000
-88.48139
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
3 Belleville Scott AFBMi Saint Clair
94
na
na
na
na
KBLV
map
digital
METAR
459
 38.55000
-89.85000
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
4 BloomingtonNormal Cent McLean
66
na
na
na
na
KBMI
map
digital
METAR
873
 40.47667
-88.91556
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
5 Cahokia St Louis St Saint Charle
89
na
na
na
na
KCPS
map
digital
METAR
413
 38.57056
-90.15583
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
6 Cairo Regional Airport Alexander
77
na
na
na
na
KCIR
map
digital
METAR
322
 37.06417
-89.21917
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
7 Carbondale Murphysboro Jackson
74
na
na
na
na
KMDH
map
digital
METAR
410
 37.78306
-89.24500
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
8 Carmi Muni Apt White
78
na
na
na
na
KCUL
map
digital
METAR
387
 38.08917
-88.12306
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
9 Centralia Muni Apt Marion
98
na
na
na
na
KENL
map
digital
METAR
535
 38.51444
-89.09194
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
10 Champaign Urbana Univ Champaign
77
na
na
na
na
KCMI
map
digital
METAR
751
 40.03194
-88.27306
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
11 Chicago Midway Airport Cook
64
na
na
na
na
KMDW
map
digital
METAR
617
 41.78417
-87.75528
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
12 Chicago W Chicago Dupa Cook
72
na
na
na
na
KDPA
map
digital
METAR
758
 41.89639
-88.25083
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
13 Chicago Waukegan Wauke Lake
58
na
na
na
na
KUGN
map
digital
METAR
728
 42.41667
-87.86667
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
14 Chicago Wheeling PalW Cook
60
na
na
na
na
KPWK
map
digital
METAR
646
 42.12056
-87.90444
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
15 ChicagoOHare Int Apt Cook
57
na
na
na
na
KORD
map
digital
METAR
666
 41.97944
-87.90417
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
16 Danville Vermilion Co Vermilion
88
na
na
na
na
KDNV
map
digital
METAR
696
 40.19917
-87.59556
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
17 De Kalb Taylor Muni Ap DeKalb
95
na
na
na
na
KDKB
map
digital
METAR
909
 41.93361
-88.70639
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
18 Decatur Airport Macon
84
na
na
na
na
KDEC
map
digital
METAR
682
 39.83417
-88.86556
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
19 Effingham Co Mem Apt Effingham
98
na
na
na
na
K1H2
map
digital
METAR
587
 39.07056
-88.53306
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
20 FairFld Muni Apt Wayne
88
na
na
na
na
KFWC
map
digital
METAR
436
 38.37833
-88.41278
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
21 Flora Muni Apt Clay
74
na
na
na
na
KFOA
map
digital
METAR
472
 38.66472
-88.45306
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
22 Galesburg Muni Apt Knox
75
na
na
na
na
KGBG
map
digital
METAR
764
 40.93806
-90.43083
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
23 Greater Kankakee Apt Kankakee
98
na
na
na
na
KIKK
map
digital
METAR
617
 41.06861
-87.85361
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
24 HarrisburgRaleigh Apt Saline
86
na
na
na
na
KHSB
map
digital
METAR
397
 37.81139
-88.54917
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
25 Illinois Val Reg Apt La Salle
81
na
na
na
na
KVYS
map
digital
METAR
650
 41.35167
-89.14944
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
26 Jacksonville Muni Apt Morgan
89
na
na
na
na
KIJX
map
digital
METAR
614
 39.77389
-90.24167
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
27 Joliet Reg Apt Cook
97
na
na
na
na
KJOT
map
digital
METAR
581
 41.51806
-88.17528
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
28 Lansing Muni Apt Cook
53
na
na
na
na
KIGQ
map
digital
METAR
607
 41.54111
-87.52806
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
29 LawrencevilleVincenne Knox
55
na
na
na
na
KLWV
map
digital
METAR
430
 38.76056
-87.59889
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
30 Lewis Univ Apt Cook
58
na
na
na
na
KLOT
map
digital
METAR
669
 41.60306
-88.10139
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
31 LitchFld Muni Apt Montgomery
96
na
na
na
na
K3LF
map
digital
METAR
679
 39.16028
-89.67417
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
32 Logan County Airport Logan
76
na
na
na
na
KAAA
map
digital
METAR
591
 40.15889
-89.33889
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
33 Macomb Muni Apt McDonough
95
na
na
na
na
KMQB
map
digital
METAR
709
 40.52028
-90.65250
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
34 Marion Williamson Co R Williamson
94
na
na
na
na
KMWA
map
digital
METAR
472
 37.75028
-89.00083
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
35 Marshall Co Apt Marshall
97
na
na
na
na
KC75
map
digital
METAR
545
 41.02306
-89.38833
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
36 Mattoon Charleston Col Coles
70
na
na
na
na
KMTO
map
digital
METAR
722
 39.47806
-88.27917
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
37 Metropolis Muni Apt Massac
89
na
na
na
na
KM30
map
digital
METAR
384
 37.18556
-88.75056
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
38 Moline QuadCty Apt Rock Island
75
na
na
na
na
KMLI
map
digital
METAR
587
 41.45139
-90.51444
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
39 Morris MuniJames R Wa Grundy
77
na
na
na
na
KC09
map
digital
METAR
584
 41.43139
-88.41500
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
40 Mount Carmel Muni Apt Knox
98
na
na
na
na
KAJG
map
digital
METAR
423
 38.60917
-87.72500
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
41 Mount Sterling Muni Ap Schuyler Cou
79
na
na
na
na
KI63
map
digital
METAR
732
 39.98722
-90.80417
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
AVG AVG nmme
-
42 Mount Vernon Airport Jefferson
76
na
na
na
na
KMVN
map
digital
METAR
479
 38.31667
-88.86667
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
43 OlneyNoble Airport Richland
98
na
na
na
na
KOLY
map
digital
METAR
482
 38.72167
-88.17639
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
44 Paris Edgar Co Apt Edgar
78
na
na
na
na
KPRG
map
digital
METAR
653
 39.70028
-87.66944
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
45 Peoria Greater Peoria Peoria
71
na
na
na
na
KPIA
map
digital
METAR
659
 40.66722
-89.68389
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
46 PittsFld Penstone Muni Pike
84
na
na
na
na
KPPQ
map
digital
METAR
709
 39.63889
-90.77806
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
47 Pontiac Muni Apt Livingston
81
na
na
na
na
KPNT
map
digital
METAR
650
 40.92306
-88.62111
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
48 Quincy RegBaldwin Fld Adams
76
na
na
na
na
KUIN
map
digital
METAR
768
 39.94250
-91.19417
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
49 Rantoul Nat Aviation C Champaign
96
na
na
na
na
KTIP
map
digital
METAR
732
 40.28944
-88.14722
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
50 Rochelle MuniKoritz F Ogle
94
na
na
na
na
KRPJ
map
digital
METAR
768
 41.89056
-89.08167
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
51 Rockford Greater Rockf Winnebago
72
na
na
na
na
KRFD
map
digital
METAR
735
 42.19278
-89.09306
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
52 SalemLeckrone Airport Marion
98
na
na
na
na
KSLO
map
digital
METAR
574
 38.64278
-88.96417
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
53 Schaumburg Reg Apt Cook County
98
na
na
na
na
K06C
map
digital
METAR
801
 41.98917
-88.10111
2024
2023
2022
2021
-
-
nmme
-
54 Sparta CommunityHunte Randolph
75
na
na
na
na
KSAR
map
digital
METAR
538
 38.14889
-89.69833
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
55 SpringFld Abraham Linc Sangamon
72
na
na
na
na
KSPI
map
digital
METAR
597
 39.84528
-89.68389
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
56 St Louis Reg Apt Madison
83
na
na
na
na
KALN
map
digital
METAR
518
 38.88944
-90.03139
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
57 Sterling Rockfalls Whiteside
64
na
na
na
na
KSQI
map
digital
METAR
646
 41.75000
-89.66667
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-
58 Taylorville Muni Apt Sangamon
97
na
na
na
na
KTAZ
map
digital
METAR
623
 39.53417
-89.32778
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
AVG AVG nmme
-

[USPEST.ORG/WEA Home] [Intro] [US DD Mapmaker] [Main Table Index] [Links]
Oregon IPM Center at State University National Plant Diagnostics Network The PRISM Group at OSU Fox Weather, LLC University of Utah Mesowest Western
 Region Pest Management Center National
 Institute of Food and Agriculture
All data provided "as is" and users assume all risk in its use - see full disclaimer. All NWS derived data is not subject to copyright protection. This site hosted by the Oregon IPM Center at Oregon State University with support from USDA APHIS, various USDA NIFA grants, and USDA Western Region IPM Center. Climate map data provided by OSU PRISM Group, realtime public weather data provided by U. Utah Mesowest and various other networks.
This site on-line since April 5, 1996; last update Jan. 3, 2024
Contact Len Coop, OSU IPPC and Horticulture Dept. at coopl@science.oregonstate.edu or if you have any questions about this information.