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 January 2021. For more information, please see Climatological Rankings.
Illinois
Average Temperature Rankings, August 1999
View Period (Months):All1234567891011121824364860
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| Period | Value | 1901-2000 Mean |
Anomaly | Rank (1895-2020) |
Warmest/Coolest Since |
Record |
|---|---|---|---|---|---|---|
|
August 1999 1-Month |
71.7°F (22.1°C) | 73.4°F (23.0°C) |
-1.7°F (-0.9°C) | 27th Coolest | Coolest since: 1997 | 1915 |
| 100th Warmest | Warmest since: 1998 | 1947 | ||||
| Ties: 1912, 1965 | ||||||
|
Jul–Aug 1999 2-Month |
75.1°F (23.9°C) | 74.4°F (23.6°C) |
0.7°F (0.3°C) | 84th Coolest | Coolest since: 1998 | 1915 |
| 43rd Warmest | Warmest since: 1998 | 1936 | ||||
| Ties: 1998, 2019 | ||||||
|
Jun–Aug 1999 3-Month |
74.2°F (23.4°C) | 73.5°F (23.1°C) |
0.7°F (0.3°C) | 87th Coolest | Coolest since: 1998 | 1915 |
| 40th Warmest | Warmest since: 1995 | 1936 | ||||
| Ties: 1899, 1918, 1925, 1937, 1938, 1984 | ||||||
|
May–Aug 1999 4-Month |
71.6°F (22.0°C) | 70.6°F (21.4°C) |
1.0°F (0.6°C) | 87th Coolest | Coolest since: 1997 | 1915 |
| 40th Warmest | Warmest since: 1998 | 1934, 1936 | ||||
| Ties: 1954, 2002 | ||||||
|
Apr–Aug 1999 5-Month |
68.2°F (20.1°C) | 66.8°F (19.3°C) |
1.4°F (0.8°C) | 101st Coolest | Coolest since: 1997 | 1907 |
| 26th Warmest | Warmest since: 1998 | 1934 | ||||
| Ties: 2016 | ||||||
|
Mar–Aug 1999 6-Month |
63.2°F (17.3°C) | 62.3°F (16.8°C) |
0.9°F (0.5°C) | 87th Coolest | Coolest since: 1997 | 1904, 1950, 1960 |
| 40th Warmest | Warmest since: 1998 | 2012 | ||||
| Ties: 1973, 2018 | ||||||
|
Feb–Aug 1999 7-Month |
59.5°F (15.3°C) | 57.6°F (14.2°C) |
1.9°F (1.1°C) | 112th Coolest | Coolest since: 1997 | 1904 |
| 15th Warmest | Warmest since: 1998 | 2012 | ||||
|
Jan–Aug 1999 8-Month |
55.2°F (12.9°C) | 53.5°F (11.9°C) |
1.7°F (1.0°C) | 102nd Coolest | Coolest since: 1997 | 1904, 1912 |
| 25th Warmest | Warmest since: 1998 | 2012 | ||||
| Ties: 2007 | ||||||
|
Dec 1998–Aug 1999 9-Month |
53.0°F (11.7°C) | 50.9°F (10.5°C) |
2.1°F (1.2°C) | 109th Coolest | Coolest since: 1997 | 1904 |
| 17th Warmest | Warmest since: 1998 | 2012 | ||||
| Ties: 1953, 2007 | ||||||
|
Nov 1998–Aug 1999 10-Month |
52.2°F (11.2°C) | 49.8°F (9.9°C) |
2.4°F (1.3°C) | 113th Coolest | Coolest since: 1997 | 1904 |
| 13th Warmest | Warmest since: 1998 | 2012 | ||||
| Ties: 1954, 2007 | ||||||
|
Oct 1998–Aug 1999 11-Month |
52.6°F (11.4°C) | 50.3°F (10.2°C) |
2.3°F (1.2°C) | 113th Coolest | Coolest since: 1997 | 1904 |
| 13th Warmest | Warmest since: 1998 | 2012 | ||||
| Ties: 1987 | ||||||
|
Sep 1998–Aug 1999 12-Month |
54.2°F (12.3°C) | 51.7°F (10.9°C) |
2.5°F (1.4°C) | 120th Coolest | Coolest since: 1998 | 1904 |
| 6th Warmest | Warmest since: 1991 | 2012 | ||||
| Ties: 1991, 2006 | ||||||
|
Mar 1998–Aug 1999 18-Month |
57.4°F (14.1°C) | 55.2°F (12.9°C) |
2.2°F (1.2°C) | 122nd Coolest | Coolest since: 1998 | 1904 |
| 4th Warmest | Warmest since: 1932 | 2012 | ||||
| Ties: 1932, 2006 | ||||||
|
Sep 1997–Aug 1999 24-Month |
54.0°F (12.2°C) | 51.6°F (10.9°C) |
2.4°F (1.3°C) | 121st Coolest | Coolest since: 1998 | 1905 |
| 4th Warmest | Warmest to Date | 2017 | ||||
| Ties: 2000, 2018 | ||||||
|
Sep 1996–Aug 1999 36-Month |
52.8°F (11.6°C) | 51.6°F (10.9°C) |
1.2°F (0.7°C) | 104th Coolest | Coolest since: 1998 | 1979 |
| 20th Warmest | Warmest since: 1988 | 2018 | ||||
|
Sep 1995–Aug 1999 48-Month |
52.1°F (11.2°C) | 51.6°F (10.9°C) |
0.5°F (0.3°C) | 84th Coolest | Coolest since: 1998 | 1905 |
| 39th Warmest | Warmest since: 1993 | 2019 | ||||
| Ties: 1937, 1939, 1940, 1943, 1949, 1954, 1976, 1987, 2011 | ||||||
|
Sep 1994–Aug 1999 60-Month |
52.3°F (11.3°C) | 51.5°F (10.8°C) |
0.8°F (0.5°C) | 86th Coolest | Coolest since: 1998 | 1906 |
| 36th Warmest | Warmest since: 1995 | 2020 | ||||
| Ties: 1943, 1958, 1995, 2011 | ||||||
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published February 2021, retrieved on February 27, 2021 from https://www.ncdc.noaa.gov/cag/