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, April 1940

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
April 1940
1-Month
49.6°F
(9.8°C)
51.3°F
(10.7°C)
-1.7°F
(-0.9°C)
33rd Coolest
Coolest since:
2018
96th Warmest
Warmest since:
2010
Ties: 1984
Mar–Apr 1940
2-Month
42.6°F
(5.9°C)
45.2°F
(7.3°C)
-2.6°F
(-1.4°C)
24th Coolest
Coolest since:
1960
105th Warmest
Warmest since:
2012
Feb–Apr 1940
3-Month
37.7°F
(3.2°C)
39.5°F
(4.2°C)
-1.8°F
(-1.0°C)
39th Coolest
Coolest since:
1899
90th Warmest
Warmest since:
2012
Ties: 1934
Jan–Apr 1940
4-Month
31.0°F
(-0.6°C)
35.6°F
(2.0°C)
-4.6°F
(-2.6°C)
8th Coolest
Coolest since:
1912
121st Warmest
Warmest since:
2012
Dec 1939–Apr 1940
5-Month
31.6°F
(-0.2°C)
34.2°F
(1.2°C)
-2.6°F
(-1.4°C)
16th Coolest
Coolest since:
1978
112th Warmest
Warmest since:
2012
Ties: 1917, 1965
Nov 1939–Apr 1940
6-Month
33.0°F
(0.6°C)
35.2°F
(1.8°C)
-2.2°F
(-1.2°C)
18th Coolest
Coolest since:
1904, 1912, 1978
110th Warmest
Warmest since:
2012
Ties: 1970, 2001
Oct 1939–Apr 1940
7-Month
36.4°F
(2.4°C)
37.9°F
(3.3°C)
-1.5°F
(-0.9°C)
22nd Coolest
Coolest since:
1912
106th Warmest
Warmest since:
2012
Ties: 1965
Sep 1939–Apr 1940
8-Month
40.6°F
(4.8°C)
41.5°F
(5.3°C)
-0.9°F
(-0.5°C)
34th Coolest
Coolest since:
1904, 1978
94th Warmest
Warmest since:
2017
Ties: 1956, 1959
Aug 1939–Apr 1940
9-Month
44.1°F
(6.7°C)
45.0°F
(7.2°C)
-0.9°F
(-0.5°C)
31st Coolest
Coolest since:
1978
97th Warmest
Warmest since:
2017
Ties: 1897, 1944, 2001
Jul 1939–Apr 1940
10-Month
47.4°F
(8.6°C)
48.1°F
(8.9°C)
-0.7°F
(-0.3°C)
36th Coolest
Coolest since:
1904
92nd Warmest
Warmest since:
2012
Ties: 1944, 1952, 1986
Jun 1939–Apr 1940
11-Month
49.7°F
(9.8°C)
50.3°F
(10.2°C)
-0.6°F
(-0.4°C)
41st Coolest
Coolest since:
1904
87th Warmest
Warmest since:
2017
Ties: 1930, 1943, 1971, 2009
May 1939–Apr 1940
12-Month
51.1°F
(10.6°C)
51.3°F
(10.7°C)
-0.2°F
(-0.1°C)
53rd Coolest
Coolest since:
1918
75th Warmest
Warmest since:
2017
Ties: 1897, 1924, 1928, 1973, 1984
Nov 1938–Apr 1940
18-Month
46.3°F
(7.9°C)
45.9°F
(7.7°C)
0.4°F
(0.2°C)
79th Coolest
Coolest since:
1979
48th Warmest
Warmest since:
2017
Ties: 1938, 1953, 1957, 2004, 2020
May 1938–Apr 1940
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: 1956, 1990, 2002, 2016, 2021, 2022
May 1937–Apr 1940
36-Month
52.2°F
(11.2°C)
51.2°F
(10.7°C)
1.0°F
(0.5°C)
102nd Coolest
Coolest since:
1979
24th Warmest
Warmest since:
2018
Ties: 1921, 1922, 1954, 1957, 2004
May 1936–Apr 1940
48-Month
52.3°F
(11.3°C)
51.2°F
(10.7°C)
1.1°F
(0.6°C)
106th Coolest
Coolest since:
1980
19th Warmest
Warmest since:
1935
Ties: 1955, 1990, 2005, 2013
May 1935–Apr 1940
60-Month
51.5°F
(10.8°C)
51.2°F
(10.7°C)
0.3°F
(0.1°C)
72nd Coolest
Coolest since:
1906, 1979
52nd Warmest
Warmest since:
1935
Ties: 1922, 1954, 1959, 1999, 2015

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