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 8. Southwest

Average Temperature Rankings, August 1918

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
August 1918
1-Month
80.8°F
(27.1°C)
76.0°F
(24.4°C)
4.8°F
(2.7°C)
122nd Coolest
Coolest since:
1915
7th Warmest
Warmest since:
1936
Jul–Aug 1918
2-Month
78.6°F
(25.9°C)
77.0°F
(25.0°C)
1.6°F
(0.9°C)
104th Coolest
Coolest since:
1967
25th Warmest
Warmest since:
1936
Jun–Aug 1918
3-Month
77.4°F
(25.2°C)
75.9°F
(24.4°C)
1.5°F
(0.8°C)
101st Coolest
Coolest since:
1915, 1927
28th Warmest
Warmest since:
1936
Ties: 2022
May–Aug 1918
4-Month
75.3°F
(24.1°C)
73.2°F
(22.9°C)
2.1°F
(1.2°C)
112th Coolest
Coolest since:
1967
17th Warmest
Warmest since:
1936
Apr–Aug 1918
5-Month
70.5°F
(21.4°C)
69.6°F
(20.9°C)
0.9°F
(0.5°C)
83rd Coolest
Coolest since:
1907
46th Warmest
Warmest since:
2010
Ties: 2019
Mar–Aug 1918
6-Month
67.2°F
(19.6°C)
65.5°F
(18.6°C)
1.7°F
(1.0°C)
114th Coolest
Coolest since:
1904
15th Warmest
Warmest to Date
2012
Ties: 1953, 1986
Feb–Aug 1918
7-Month
62.7°F
(17.1°C)
61.1°F
(16.2°C)
1.6°F
(0.9°C)
106th Coolest
Coolest since:
1904
23rd Warmest
Warmest to Date
2012
Jan–Aug 1918
8-Month
56.9°F
(13.8°C)
57.3°F
(14.1°C)
-0.4°F
(-0.3°C)
42nd Coolest
Coolest since:
1912
87th Warmest
Warmest since:
2012
Ties: 1903, 1972, 1993, 2013, 2015
Dec 1917–Aug 1918
9-Month
53.2°F
(11.8°C)
54.8°F
(12.7°C)
-1.6°F
(-0.9°C)
16th Coolest
Coolest since:
1904
112th Warmest
Warmest since:
2012
Ties: 1905, 1970
Nov 1917–Aug 1918
10-Month
52.4°F
(11.3°C)
53.8°F
(12.1°C)
-1.4°F
(-0.8°C)
19th Coolest
Coolest since:
1904
109th Warmest
Warmest since:
2012
Ties: 1917, 1963
Oct 1917–Aug 1918
11-Month
52.2°F
(11.2°C)
54.1°F
(12.3°C)
-1.9°F
(-1.1°C)
6th Coolest
Coolest since:
1904
122nd Warmest
Warmest since:
2012
Sep 1917–Aug 1918
12-Month
53.5°F
(11.9°C)
55.4°F
(13.0°C)
-1.9°F
(-1.1°C)
6th Coolest
Coolest since:
1904
122nd Warmest
Warmest since:
2012
Mar 1917–Aug 1918
18-Month
56.7°F
(13.7°C)
58.7°F
(14.8°C)
-2.0°F
(-1.1°C)
2nd Coolest
Coolest since:
1904
126th Warmest
Warmest since:
2012
Sep 1916–Aug 1918
24-Month
53.7°F
(12.1°C)
55.4°F
(13.0°C)
-1.7°F
(-0.9°C)
4th Coolest
Coolest since:
1979
123rd Warmest
Warmest since:
2017
Ties: 1904
Sep 1915–Aug 1918
36-Month
54.4°F
(12.4°C)
55.4°F
(13.0°C)
-1.0°F
(-0.6°C)
9th Coolest
Coolest since:
1979
117th Warmest
Warmest since:
2018
Ties: 1960, 1969
Sep 1914–Aug 1918
48-Month
54.3°F
(12.4°C)
55.3°F
(12.9°C)
-1.0°F
(-0.5°C)
9th Coolest
Coolest since:
1980
116th Warmest
Warmest since:
2019
Ties: 1978
Sep 1913–Aug 1918
60-Month
54.8°F
(12.7°C)
55.3°F
(12.9°C)
-0.5°F
(-0.2°C)
19th Coolest
Coolest since:
1906
105th Warmest
Warmest since:
2020
Ties: 1903, 1961, 1964, 1983, 1997

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