Divisional Rankings

Divisional Data Info
Please note, Degree Days and Palmer Indices are not available for Alaska. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Illinois, Climate Division 5. East

Average Temperature Rankings, May 1999

View Period (Months):
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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
May 1999
1-Month
64.2°F
(17.9°C)
61.0°F
(16.1°C)
3.2°F
(1.8°C)
100th Coolest
Coolest since:
1907
29th Warmest
Warmest since:
2018
Ties: 2000, 2001
Apr–May 1999
2-Month
58.5°F
(14.7°C)
55.4°F
(13.0°C)
3.1°F
(1.7°C)
112th Coolest
Coolest since:
1907
17th Warmest
Warmest since:
1977
Mar–May 1999
3-Month
51.2°F
(10.7°C)
49.7°F
(9.8°C)
1.5°F
(0.9°C)
92nd Coolest
Coolest since:
1960
37th Warmest
Warmest since:
2012
Ties: 1959, 2003, 2015
Feb–May 1999
4-Month
47.3°F
(8.5°C)
44.2°F
(6.8°C)
3.1°F
(1.7°C)
114th Coolest
Coolest since:
1978
15th Warmest
Warmest since:
2012
Jan–May 1999
5-Month
42.4°F
(5.8°C)
40.1°F
(4.5°C)
2.3°F
(1.3°C)
111th Coolest
Coolest since:
1978
18th Warmest
Warmest since:
2012
Ties: 1896, 1932
Dec 1998–May 1999
6-Month
41.1°F
(5.1°C)
38.1°F
(3.4°C)
3.0°F
(1.7°C)
116th Coolest
Coolest since:
1978
12th Warmest
Warmest since:
2012
Nov 1998–May 1999
7-Month
41.6°F
(5.3°C)
38.3°F
(3.5°C)
3.3°F
(1.8°C)
118th Coolest
Coolest since:
1904
10th Warmest
Warmest since:
2012
Ties: 2006
Oct 1998–May 1999
8-Month
43.4°F
(6.3°C)
40.2°F
(4.6°C)
3.2°F
(1.7°C)
118th Coolest
Coolest since:
1904
10th Warmest
Warmest since:
2012
Sep 1998–May 1999
9-Month
46.4°F
(8.0°C)
43.0°F
(6.1°C)
3.4°F
(1.9°C)
122nd Coolest
Coolest since:
1904
6th Warmest
Warmest since:
2012
Aug 1998–May 1999
10-Month
49.2°F
(9.6°C)
45.9°F
(7.7°C)
3.3°F
(1.9°C)
123rd Coolest
Coolest since:
1904
5th Warmest
Warmest since:
2012
Jul 1998–May 1999
11-Month
51.4°F
(10.8°C)
48.5°F
(9.2°C)
2.9°F
(1.6°C)
123rd Coolest
Coolest since:
1904
5th Warmest
Warmest since:
2012
Ties: 2006
Jun 1998–May 1999
12-Month
53.0°F
(11.7°C)
50.3°F
(10.2°C)
2.7°F
(1.5°C)
122nd Coolest
Coolest since:
1904
6th Warmest
Warmest since:
2012
Dec 1997–May 1999
18-Month
49.8°F
(9.9°C)
46.2°F
(7.9°C)
3.6°F
(2.0°C)
125th Coolest
Coolest since:
1905
2nd Warmest
Warmest to Date
2017
Jun 1997–May 1999
24-Month
52.7°F
(11.5°C)
50.3°F
(10.2°C)
2.4°F
(1.3°C)
121st Coolest
Coolest since:
1905
6th Warmest
Warmest since:
2017
Ties: 1932
Jun 1996–May 1999
36-Month
51.6°F
(10.9°C)
50.3°F
(10.2°C)
1.3°F
(0.7°C)
106th Coolest
Coolest since:
1905, 1906
20th Warmest
Warmest since:
2018
Ties: 1989, 2004, 2014
Jun 1995–May 1999
48-Month
51.1°F
(10.6°C)
50.2°F
(10.1°C)
0.9°F
(0.5°C)
89th Coolest
Coolest since:
1905
36th Warmest
Warmest since:
2019
Ties: 1923, 1987, 2015
Jun 1994–May 1999
60-Month
51.2°F
(10.7°C)
50.2°F
(10.1°C)
1.0°F
(0.6°C)
92nd Coolest
Coolest since:
1905, 1906, 1908
32nd Warmest
Warmest since:
2020
Ties: 1990

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