Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. Degree Days are not available for Great Plains, Souther Plains and Gulf Coast Rockies and Westward, River Basins, or Agricultural Belts. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Ohio River Basin

Average Temperature Rankings, December 1999

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
December 1999
1-Month
35.0°F
(1.7°C)
32.4°F
(0.2°C)
2.6°F
(1.5°C)
89th Coolest
Coolest since:
1989
40th Warmest
Warmest since:
2015
Nov–Dec 1999
2-Month
41.7°F
(5.4°C)
37.4°F
(3.0°C)
4.3°F
(2.4°C)
119th Coolest
Coolest since:
1976
10th Warmest
Warmest since:
2015
Oct–Dec 1999
3-Month
45.7°F
(7.6°C)
43.0°F
(6.1°C)
2.7°F
(1.5°C)
111th Coolest
Coolest since:
1917
18th Warmest
Warmest since:
2015
Sep–Dec 1999
4-Month
50.7°F
(10.4°C)
48.7°F
(9.3°C)
2.0°F
(1.1°C)
107th Coolest
Coolest since:
1976
22nd Warmest
Warmest since:
1931
Ties: 1956
Aug–Dec 1999
5-Month
54.9°F
(12.7°C)
53.4°F
(11.9°C)
1.5°F
(0.8°C)
109th Coolest
Coolest since:
1976
20th Warmest
Warmest since:
1931
Ties: 1921, 1956, 1970, 2005
Jul–Dec 1999
6-Month
58.6°F
(14.8°C)
56.8°F
(13.8°C)
1.8°F
(1.0°C)
114th Coolest
Coolest since:
1976
15th Warmest
Warmest since:
1931
Ties: 2020
Jun–Dec 1999
7-Month
60.4°F
(15.8°C)
58.7°F
(14.8°C)
1.7°F
(1.0°C)
115th Coolest
Coolest since:
1976
14th Warmest
Warmest since:
1931
Ties: 2018, 2019, 2020
May–Dec 1999
8-Month
60.7°F
(15.9°C)
59.0°F
(15.0°C)
1.7°F
(0.9°C)
112th Coolest
Coolest since:
1917
17th Warmest
Warmest since:
1931
Ties: 1933
Apr–Dec 1999
9-Month
60.1°F
(15.6°C)
58.2°F
(14.6°C)
1.9°F
(1.0°C)
116th Coolest
Coolest since:
1917
13th Warmest
Warmest since:
2015
Ties: 2001
Mar–Dec 1999
10-Month
57.8°F
(14.3°C)
56.5°F
(13.6°C)
1.3°F
(0.7°C)
106th Coolest
Coolest since:
1917
23rd Warmest
Warmest since:
2016
Ties: 2004, 2017, 2018
Feb–Dec 1999
11-Month
56.0°F
(13.3°C)
54.3°F
(12.4°C)
1.7°F
(0.9°C)
116th Coolest
Coolest since:
1917
13th Warmest
Warmest since:
2012
Ties: 1922, 1946
Jan–Dec 1999
12-Month
53.9°F
(12.2°C)
52.2°F
(11.2°C)
1.7°F
(1.0°C)
112th Coolest
Coolest since:
1917
17th Warmest
Warmest since:
2012
Ties: 1933, 1946, 2002, 2019
Jul 1998–Dec 1999
18-Month
55.7°F
(13.2°C)
53.7°F
(12.1°C)
2.0°F
(1.1°C)
121st Coolest
Coolest since:
1904, 1917
7th Warmest
Warmest since:
2012, 2016
Ties: 2021
Jan 1998–Dec 1999
24-Month
54.6°F
(12.6°C)
52.2°F
(11.2°C)
2.4°F
(1.4°C)
125th Coolest
Coolest since:
1979
3rd Warmest
Warmest to Date
2017
Jan 1997–Dec 1999
36-Month
53.6°F
(12.0°C)
52.2°F
(11.2°C)
1.4°F
(0.8°C)
114th Coolest
Coolest since:
1980
13th Warmest
Warmest since:
2018
Ties: 1954, 1992, 2006
Jan 1996–Dec 1999
48-Month
53.0°F
(11.7°C)
52.2°F
(11.2°C)
0.8°F
(0.5°C)
99th Coolest
Coolest since:
1979
27th Warmest
Warmest since:
2019
Ties: 1932, 1935, 1939, 1949, 1957, 1992, 2003, 2015
Jan 1995–Dec 1999
60-Month
52.8°F
(11.6°C)
52.2°F
(11.2°C)
0.6°F
(0.4°C)
90th Coolest
Coolest since:
1980
35th Warmest
Warmest since:
2020
Ties: 1925, 1939, 1942, 1949, 1953, 1954, 1990, 1993

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