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 3. West

Average Temperature Rankings, May 2021

View Period (Months):
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  • Record Coolest
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  • Top 1/3
  • Top 1/10
  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
May 2021
1-Month
60.6°F
(15.9°C)
62.3°F
(16.8°C)
-1.7°F
(-0.9°C)
39th Coolest
Coolest since:
1924
90th Warmest
Warmest since:
2018
Apr–May 2021
2-Month
56.1°F
(13.4°C)
56.8°F
(13.8°C)
-0.7°F
(-0.4°C)
46th Coolest
Coolest since:
1907
83rd Warmest
Warmest since:
1896
Mar–May 2021
3-Month
52.6°F
(11.4°C)
50.9°F
(10.5°C)
1.7°F
(0.9°C)
98th Coolest
Coolest since:
1960
31st Warmest
Warmest since:
2012
Ties: 1911, 1929
Feb–May 2021
4-Month
44.0°F
(6.7°C)
45.2°F
(7.3°C)
-1.2°F
(-0.6°C)
40th Coolest
Coolest since:
1978
89th Warmest
Warmest since:
2012
Ties: 1902, 1971
Jan–May 2021
5-Month
40.8°F
(4.9°C)
40.9°F
(4.9°C)
-0.1°F
(0.0°C)
63rd Coolest
Coolest since:
1978
66th Warmest
Warmest since:
2012
Ties: 1967, 1989
Dec 2020–May 2021
6-Month
39.3°F
(4.1°C)
38.9°F
(3.8°C)
0.4°F
(0.3°C)
77th Coolest
Coolest since:
1978
51st Warmest
Warmest since:
2012
Ties: 1928, 1995
Nov 2020–May 2021
7-Month
40.3°F
(4.6°C)
39.0°F
(3.9°C)
1.3°F
(0.7°C)
94th Coolest
Coolest since:
1978
34th Warmest
Warmest since:
2012
Ties: 1922
Oct 2020–May 2021
8-Month
41.6°F
(5.3°C)
41.0°F
(5.0°C)
0.6°F
(0.3°C)
79th Coolest
Coolest since:
1978
49th Warmest
Warmest since:
2012
Ties: 1908, 1953
Sep 2020–May 2021
9-Month
44.1°F
(6.7°C)
43.7°F
(6.5°C)
0.4°F
(0.2°C)
76th Coolest
Coolest since:
1978
52nd Warmest
Warmest since:
2012
Ties: 1925, 1935
Aug 2020–May 2021
10-Month
47.0°F
(8.3°C)
46.7°F
(8.2°C)
0.3°F
(0.1°C)
70th Coolest
Coolest since:
1978
58th Warmest
Warmest since:
2012
Ties: 1900, 1915, 1988
Jul 2020–May 2021
11-Month
49.7°F
(9.8°C)
49.4°F
(9.7°C)
0.3°F
(0.1°C)
72nd Coolest
Coolest since:
1904
56th Warmest
Warmest since:
2012
Ties: 1908, 1923, 1950, 2011, 2013
Jun 2020–May 2021
12-Month
51.7°F
(10.9°C)
51.2°F
(10.7°C)
0.5°F
(0.2°C)
80th Coolest
Coolest since:
1904
48th Warmest
Warmest since:
2012
Ties: 1923, 1950, 2011, 2018
Dec 2019–May 2021
18-Month
48.2°F
(9.0°C)
47.1°F
(8.4°C)
1.1°F
(0.6°C)
101st Coolest
Coolest since:
1979
26th Warmest
Warmest since:
2017
Jun 2019–May 2021
24-Month
52.0°F
(11.1°C)
51.2°F
(10.7°C)
0.8°F
(0.4°C)
96th Coolest
Coolest since:
1905
31st Warmest
Warmest since:
2017
Ties: 1989, 2008, 2016
Jun 2018–May 2021
36-Month
51.7°F
(10.9°C)
51.2°F
(10.7°C)
0.5°F
(0.2°C)
82nd Coolest
Coolest since:
1979
44th Warmest
Warmest since:
2018
Ties: 1944, 1976, 1993, 2020
Jun 2017–May 2021
48-Month
51.7°F
(10.9°C)
51.2°F
(10.7°C)
0.5°F
(0.2°C)
83rd Coolest
Coolest since:
1980
42nd Warmest
Warmest since:
1935
Ties: 1936, 1943, 1945, 1987, 1993
Jun 2016–May 2021
60-Month
52.4°F
(11.3°C)
51.2°F
(10.7°C)
1.2°F
(0.6°C)
116th Coolest
Coolest since:
1906, 1907, 1979
8th Warmest
Warmest since:
1935
Ties: 1936, 1942, 2003, 2007, 2019

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