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 2018
View Period (Months):All1234567891011121824364860
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| Period | Value | 1901-2000 Mean |
Anomaly | Rank (1895-2020) |
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) | 116th Coolest | Coolest since: 2017 | 1918 |
| 11th Warmest | Warmest since: 2016 | 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) | 114th Coolest | Coolest since: 2017 | 1967 |
| 13th Warmest | Warmest since: 2016 | 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) | 100th Coolest | Coolest since: 2017 | 1967 |
| 27th Warmest | Warmest since: 2016 | 1936 | ||||
|
Jun–Sep 2018 4-Month |
73.7°F (23.2°C) | 71.6°F (22.0°C) |
2.1°F (1.2°C) | 113th Coolest | Coolest since: 2017 | 1915, 1924 |
| 14th Warmest | Warmest since: 2016 | 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) | 125th Coolest | Coolest since: 2017 | 1924 |
| 2nd Warmest | Warmest since: 1936 | 1936 | ||||
|
Apr–Sep 2018 6-Month |
68.4°F (20.2°C) | 66.7°F (19.3°C) |
1.7°F (0.9°C) | 107th Coolest | Coolest since: 2017 | 1907 |
| 20th Warmest | Warmest since: 2016 | 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) | 103rd Coolest | Coolest since: 2017 | 1924 |
| 24th Warmest | Warmest since: 2017 | 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) | 109th Coolest | Coolest since: 2015 | 1904 |
| 18th Warmest | Warmest since: 2017 | 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) | 92nd Coolest | Coolest since: 2015 | 1904, 1912 |
| 35th Warmest | Warmest since: 2017 | 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: 2015 | 1904 |
| 36th Warmest | Warmest since: 2017 | 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: 2015 | 1904 |
| 31st Warmest | Warmest since: 2017 | 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: 2015 | 1904 |
| 26th Warmest | Warmest since: 2017 | 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) | 101st Coolest | Coolest since: 2015 | 1904, 1918 |
| 25th Warmest | Warmest since: 2017 | 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) | 121st Coolest | Coolest since: 2016 | 1979 |
| 4th Warmest | Warmest since: 2017 | 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) | 123rd Coolest | Coolest since: 2017 | 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) | 121st Coolest | Coolest since: 2017 | 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: 2017 | 1906 |
| 16th Warmest | Warmest since: 2016 | 2020 | ||||
| Ties: 1933, 1936, 1956, 2001, 2004, 2005 | ||||||
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published January 2021, retrieved on January 27, 2021 from https://www.ncdc.noaa.gov/cag/