Statewide Rankings

Statewide 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

Average Temperature Rankings, September 2018

View Period (Months):
Download: csv json xml
  • Record Coolest
  • Bottom 1/10
  • Bottom 1/3
  • Normal
  • Top 1/3
  • Top 1/10
  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
September 2018
1-Month
70.3°F
(21.3°C)
66.2°F
(19.0°C)
4.1°F
(2.3°C)
118th Coolest
Coolest since:
1918
11th Warmest
Warmest since:
1925, 1933
Ties: 1921
Aug–Sep 2018
2-Month
72.5°F
(22.5°C)
69.8°F
(21.0°C)
2.7°F
(1.5°C)
115th Coolest
Coolest since:
1967
14th Warmest
Warmest since:
1936
Ties: 1980
Jul–Sep 2018
3-Month
73.3°F
(22.9°C)
71.7°F
(22.1°C)
1.6°F
(0.8°C)
102nd Coolest
Coolest since:
1967
27th Warmest
Warmest since:
1936
Ties: 2021
Jun–Sep 2018
4-Month
73.7°F
(23.2°C)
71.6°F
(22.0°C)
2.1°F
(1.2°C)
115th Coolest
Coolest since:
1915, 1924
14th Warmest
Warmest since:
1936
Ties: 1913, 1925, 1953
May–Sep 2018
5-Month
73.1°F
(22.8°C)
69.7°F
(20.9°C)
3.4°F
(1.9°C)
127th Coolest
Coolest since:
1924
2nd Warmest
Warmest since:
1936
Apr–Sep 2018
6-Month
68.4°F
(20.2°C)
66.7°F
(19.3°C)
1.7°F
(0.9°C)
109th Coolest
Coolest since:
1907
20th Warmest
Warmest since:
2010
Ties: 1914, 1959
Mar–Sep 2018
7-Month
64.2°F
(17.9°C)
62.8°F
(17.1°C)
1.4°F
(0.8°C)
104th Coolest
Coolest since:
1924
25th Warmest
Warmest since:
2012
Ties: 1930, 2017
Feb–Sep 2018
8-Month
60.2°F
(15.7°C)
58.7°F
(14.8°C)
1.5°F
(0.9°C)
111th Coolest
Coolest since:
1904
18th Warmest
Warmest since:
2012
Ties: 1931, 1953, 1986, 1999, 2002, 2007
Jan–Sep 2018
9-Month
56.2°F
(13.4°C)
55.0°F
(12.8°C)
1.2°F
(0.6°C)
94th Coolest
Coolest since:
1904, 1912
35th Warmest
Warmest since:
2012
Ties: 1941, 1964, 1973
Dec 2017–Sep 2018
10-Month
53.5°F
(11.9°C)
52.4°F
(11.3°C)
1.1°F
(0.6°C)
90th Coolest
Coolest since:
1904
38th Warmest
Warmest since:
2012
Nov 2017–Sep 2018
11-Month
52.5°F
(11.4°C)
51.4°F
(10.8°C)
1.1°F
(0.6°C)
95th Coolest
Coolest since:
1904
33rd Warmest
Warmest since:
2012
Ties: 1925, 1941, 1976, 2004
Oct 2017–Sep 2018
12-Month
52.9°F
(11.6°C)
51.6°F
(10.9°C)
1.3°F
(0.7°C)
100th Coolest
Coolest since:
1904
28th Warmest
Warmest since:
2012
Ties: 1914, 1933, 1934
Apr 2017–Sep 2018
18-Month
57.9°F
(14.4°C)
56.7°F
(13.7°C)
1.2°F
(0.7°C)
102nd Coolest
Coolest since:
1904, 1918
26th Warmest
Warmest since:
2012
Ties: 1953
Oct 2016–Sep 2018
24-Month
54.0°F
(12.2°C)
51.7°F
(10.9°C)
2.3°F
(1.3°C)
123rd Coolest
Coolest since:
1979
4th Warmest
Warmest since:
2017
Ties: 1999
Oct 2015–Sep 2018
36-Month
54.4°F
(12.4°C)
51.6°F
(10.9°C)
2.8°F
(1.5°C)
125th Coolest
Coolest since:
1979
1st Warmest
Warmest to Date
2018
Oct 2014–Sep 2018
48-Month
53.6°F
(12.0°C)
51.6°F
(10.9°C)
2.0°F
(1.1°C)
123rd Coolest
Coolest since:
1905
2nd Warmest
Warmest to Date
2019
Oct 2013–Sep 2018
60-Month
52.7°F
(11.5°C)
51.6°F
(10.9°C)
1.1°F
(0.6°C)
106th Coolest
Coolest since:
1906
18th Warmest
Warmest since:
2020
Ties: 1933, 1936, 1956, 2001, 2004, 2005

Citing This Page