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 December 2020. For more information, please see Climatological Rankings.
Illinois
Average Temperature Rankings, September 1978
View Period (Months):All1234567891011121824364860
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| Period | Value | 1901-2000 Mean |
Anomaly | Rank (1895-2020) |
Warmest/Coolest Since |
Record |
|---|---|---|---|---|---|---|
|
September 1978 1-Month |
70.1°F (21.2°C) | 66.2°F (19.0°C) |
3.9°F (2.2°C) | 114th Coolest | Coolest since: 1977 | 1918 |
| 13th Warmest | Warmest since: 1939 | 1925, 1933 | ||||
|
Aug–Sep 1978 2-Month |
71.6°F (22.0°C) | 69.9°F (21.1°C) |
1.7°F (0.9°C) | 98th Coolest | Coolest since: 1977 | 1967 |
| 29th Warmest | Warmest since: 1960 | 1936 | ||||
| Ties: 1921, 1922 | ||||||
|
Jul–Sep 1978 3-Month |
72.7°F (22.6°C) | 71.7°F (22.1°C) |
1.0°F (0.5°C) | 88th Coolest | Coolest since: 1977 | 1967 |
| 39th Warmest | Warmest since: 1959 | 1936 | ||||
| Ties: 1987 | ||||||
|
Jun–Sep 1978 4-Month |
72.6°F (22.6°C) | 71.7°F (22.1°C) |
0.9°F (0.5°C) | 89th Coolest | Coolest since: 1977 | 1915, 1924 |
| 38th Warmest | Warmest since: 1959 | 1936 | ||||
| Ties: 1895, 1897, 1922, 1938 | ||||||
|
May–Sep 1978 5-Month |
70.2°F (21.2°C) | 69.7°F (20.9°C) |
0.5°F (0.3°C) | 77th Coolest | Coolest since: 1976 | 1924 |
| 50th Warmest | Warmest since: 1977 | 1936 | ||||
| Ties: 1956, 1962, 1995 | ||||||
|
Apr–Sep 1978 6-Month |
67.3°F (19.6°C) | 66.7°F (19.3°C) |
0.6°F (0.3°C) | 77th Coolest | Coolest since: 1976 | 1907 |
| 50th Warmest | Warmest since: 1977 | 2010 | ||||
| Ties: 1932, 1948 | ||||||
|
Mar–Sep 1978 7-Month |
62.5°F (16.9°C) | 62.9°F (17.2°C) |
-0.4°F (-0.3°C) | 46th Coolest | Coolest since: 1975 | 1924 |
| 81st Warmest | Warmest since: 1977 | 2012 | ||||
| Ties: 1897, 1903, 1935, 1937, 2009 | ||||||
|
Feb–Sep 1978 8-Month |
56.8°F (13.8°C) | 58.7°F (14.8°C) |
-1.9°F (-1.0°C) | 12th Coolest | Coolest since: 1967 | 1904 |
| 115th Warmest | Warmest since: 1977 | 2012 | ||||
| Ties: 1899, 1967 | ||||||
|
Jan–Sep 1978 9-Month |
52.2°F (11.2°C) | 54.9°F (12.7°C) |
-2.7°F (-1.5°C) | 5th Coolest | Coolest since: 1924 | 1904, 1912 |
| 122nd Warmest | Warmest since: 1977 | 2012 | ||||
|
Dec 1977–Sep 1978 10-Month |
49.6°F (9.8°C) | 52.4°F (11.3°C) |
-2.8°F (-1.5°C) | 3rd Coolest | Coolest since: 1904 | 1904 |
| 123rd Warmest | Warmest since: 1977 | 2012 | ||||
|
Nov 1977–Sep 1978 11-Month |
48.9°F (9.4°C) | 51.4°F (10.8°C) |
-2.5°F (-1.4°C) | 5th Coolest | Coolest since: 1951 | 1904 |
| 121st Warmest | Warmest since: 1977 | 2012 | ||||
| Ties: 1951 | ||||||
|
Oct 1977–Sep 1978 12-Month |
49.1°F (9.5°C) | 51.6°F (10.9°C) |
-2.5°F (-1.4°C) | 4th Coolest | Coolest since: 1918 | 1904 |
| 122nd Warmest | Warmest since: 1977 | 2012 | ||||
| Ties: 1979 | ||||||
|
Apr 1977–Sep 1978 18-Month |
55.8°F (13.2°C) | 56.7°F (13.7°C) |
-0.9°F (-0.5°C) | 23rd Coolest | Coolest since: 1977 | 1904, 1918 |
| 103rd Warmest | Warmest since: 1976 | 2012 | ||||
| Ties: 1910, 1927, 1958, 1970, 1994 | ||||||
|
Oct 1976–Sep 1978 24-Month |
49.7°F (9.8°C) | 51.6°F (10.9°C) |
-1.9°F (-1.1°C) | 4th Coolest | Coolest since: 1918 | 1979 |
| 121st Warmest | Warmest since: 1977 | 2017 | ||||
|
Oct 1975–Sep 1978 36-Month |
50.7°F (10.4°C) | 51.6°F (10.9°C) |
-0.9°F (-0.5°C) | 8th Coolest | Coolest since: 1962 | 1979 |
| 116th Warmest | Warmest since: 1977 | 2018 | ||||
| Ties: 1907, 1912, 1919, 1928, 1962 | ||||||
|
Oct 1974–Sep 1978 48-Month |
50.9°F (10.5°C) | 51.6°F (10.9°C) |
-0.7°F (-0.4°C) | 15th Coolest | Coolest since: 1971 | 1905 |
| 108th Warmest | Warmest since: 1977 | 2019 | ||||
| Ties: 1912, 1919, 1927, 1961, 1971 | ||||||
|
Oct 1973–Sep 1978 60-Month |
51.1°F (10.6°C) | 51.6°F (10.9°C) |
-0.5°F (-0.3°C) | 23rd Coolest | Coolest since: 1971 | 1906 |
| 99th Warmest | Warmest since: 1977 | 2020 | ||||
| Ties: 1909, 1912, 1964, 1983, 1997 | ||||||
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published January 2021, retrieved on January 16, 2021 from https://www.ncdc.noaa.gov/cag/