Climate at a Glance

Statewide Rankings

Look up monthly rankings for 1-12, 18, 24, 36, 48, and 60-month time periods using the options below. Data and statistics are as of August 2019. For more information, please see Climatological Rankings.


Illinois

Average Temperature Rankings, May 1978

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Period Value 1901-2000
Mean
Amomaly Rank
(1895-2019)
Warmest/Coolest
Since
Record
May 1978
1-Month
60.8°F
(16.0°C)
62.1°F
(16.7°C)
-1.3°F
(-0.7°C)
41st Coolest Coolest since: 1976 1917
85th Warmest Warmest since: 1977 2018
Ties: 1901
Apr–May 1978
2-Month
56.8°F
(13.8°C)
56.9°F
(13.8°C)
-0.1°F
(0.0°C)
49th Coolest Coolest since: 1976 1907
77th Warmest Warmest since: 1977 1896
Ties: 1905, 1913, 1939, 1946, 1952, 1956, 1975
Mar–May 1978
3-Month
49.0°F
(9.4°C)
51.1°F
(10.6°C)
-2.1°F
(-1.2°C)
18th Coolest Coolest since: 1961 1960
108th Warmest Warmest since: 1977 2012
Ties: 1912, 1920
Feb–May 1978
4-Month
41.0°F
(5.0°C)
45.7°F
(7.6°C)
-4.7°F
(-2.6°C)
1st Coolest Coolest to Date 1978
125th Warmest Warmest since: 1977 2012
Jan–May 1978
5-Month
36.0°F
(2.2°C)
41.6°F
(5.3°C)
-5.6°F
(-3.1°C)
1st Coolest Coolest to Date 1978, 1979
125th Warmest Warmest since: 1977 2012
Ties: 1979
Dec 1977–May 1978
6-Month
34.3°F
(1.3°C)
39.6°F
(4.2°C)
-5.3°F
(-2.9°C)
1st Coolest Coolest to Date 1978
124th Warmest Warmest since: 1977 2012
Nov 1977–May 1978
7-Month
35.4°F
(1.9°C)
39.8°F
(4.3°C)
-4.4°F
(-2.4°C)
2nd Coolest Coolest since: 1904 1904
123rd Warmest Warmest since: 1977 2012
Oct 1977–May 1978
8-Month
37.4°F
(3.0°C)
41.6°F
(5.3°C)
-4.2°F
(-2.3°C)
1st Coolest Coolest since: 1904 1904, 1978
124th Warmest Warmest since: 1977 2012
Ties: 1904
Sep 1977–May 1978
9-Month
40.8°F
(4.9°C)
44.4°F
(6.9°C)
-3.6°F
(-2.0°C)
2nd Coolest Coolest since: 1904 1904
123rd Warmest Warmest since: 1977 2012
Aug 1977–May 1978
10-Month
43.9°F
(6.6°C)
47.3°F
(8.5°C)
-3.4°F
(-1.9°C)
2nd Coolest Coolest since: 1904 1904
123rd Warmest Warmest since: 1977 2012
Jul 1977–May 1978
11-Month
46.9°F
(8.3°C)
49.8°F
(9.9°C)
-2.9°F
(-1.6°C)
2nd Coolest Coolest since: 1918 1904
123rd Warmest Warmest since: 1977 2012
Ties: 1918
Jun 1977–May 1978
12-Month
48.9°F
(9.4°C)
51.6°F
(10.9°C)
-2.7°F
(-1.5°C)
3rd Coolest Coolest since: 1918 1904
122nd Warmest Warmest since: 1977 2012
Dec 1976–May 1978
18-Month
45.6°F
(7.6°C)
47.6°F
(8.7°C)
-2.0°F
(-1.1°C)
6th Coolest Coolest since: 1918 1979
118th Warmest Warmest since: 1977 2017
Jun 1976–May 1978
24-Month
49.3°F
(9.6°C)
51.6°F
(10.9°C)
-2.3°F
(-1.3°C)
2nd Coolest Coolest since: 1905 1905
122nd Warmest Warmest since: 1977 2017
Ties: 1979
Jun 1975–May 1978
36-Month
50.5°F
(10.3°C)
51.6°F
(10.9°C)
-1.1°F
(-0.6°C)
8th Coolest Coolest since: 1970 1979
115th Warmest Warmest since: 1977 2018
Ties: 1919
Jun 1974–May 1978
48-Month
50.6°F
(10.3°C)
51.6°F
(10.9°C)
-1.0°F
(-0.6°C)
10th Coolest Coolest since: 1971 1980
112th Warmest Warmest since: 1977 2019
Ties: 1904, 1971
Jun 1973–May 1978
60-Month
51.1°F
(10.6°C)
51.6°F
(10.9°C)
-0.5°F
(-0.3°C)
22nd Coolest Coolest since: 1972 1906, 1907, 1908, 1981
99th Warmest Warmest since: 1977 2002
Ties: 1903, 1912, 1913, 1928, 1929, 1969

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published September 2019, retrieved on September 19, 2019 from https://www.ncdc.noaa.gov/cag/