National Rankings

National Data Info
Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Contiguous U.S.

Maximum Temperature Rankings, December 1991

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  • Record Coolest
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  • Top 1/3
  • Top 1/10
  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Warmest/Coolest
Since
Record
December 1991
1-Month
45.37°F
(7.43°C)
42.76°F
(5.98°C)
2.61°F
(1.45°C)
101st Coolest
Coolest since:
1983
27th Warmest
Warmest since:
2021
Nov–Dec 1991
2-Month
47.42°F
(8.57°C)
47.74°F
(8.74°C)
-0.32°F
(-0.17°C)
48th Coolest
Coolest since:
2000
80th Warmest
Warmest since:
1999
Oct–Dec 1991
3-Month
54.31°F
(12.39°C)
54.09°F
(12.27°C)
0.22°F
(0.12°C)
67th Coolest
Coolest since:
1972
61st Warmest
Warmest since:
1999
Sep–Dec 1991
4-Month
60.12°F
(15.62°C)
60.02°F
(15.57°C)
0.10°F
(0.05°C)
62nd Coolest
Coolest since:
1972
66th Warmest
Warmest since:
2021
Aug–Dec 1991
5-Month
65.24°F
(18.47°C)
65.05°F
(18.36°C)
0.19°F
(0.11°C)
68th Coolest
Coolest since:
1972
60th Warmest
Warmest since:
2021
Jul–Dec 1991
6-Month
68.80°F
(20.44°C)
68.65°F
(20.36°C)
0.15°F
(0.08°C)
69th Coolest
Coolest since:
1972
59th Warmest
Warmest since:
2021
Ties: 1946
Jun–Dec 1991
7-Month
70.59°F
(21.44°C)
70.46°F
(21.37°C)
0.13°F
(0.07°C)
68th Coolest
Coolest since:
1972
60th Warmest
Warmest since:
2021
May–Dec 1991
8-Month
70.96°F
(21.64°C)
70.78°F
(21.54°C)
0.18°F
(0.10°C)
71st Coolest
Coolest since:
1972
57th Warmest
Warmest since:
2021
Apr–Dec 1991
9-Month
70.23°F
(21.24°C)
69.96°F
(21.09°C)
0.27°F
(0.15°C)
71st Coolest
Coolest since:
1972
57th Warmest
Warmest since:
2012
Mar–Dec 1991
10-Month
68.68°F
(20.38°C)
68.27°F
(20.15°C)
0.41°F
(0.23°C)
83rd Coolest
Coolest since:
1912
45th Warmest
Warmest since:
2012
Ties: 1918, 1986
Feb–Dec 1991
11-Month
67.13°F
(19.52°C)
66.14°F
(18.97°C)
0.99°F
(0.55°C)
98th Coolest
Coolest since:
1912
30th Warmest
Warmest since:
2012
Jan–Dec 1991
12-Month
64.80°F
(18.22°C)
64.00°F
(17.78°C)
0.80°F
(0.44°C)
94th Coolest
Coolest since:
1912
34th Warmest
Warmest since:
2012
Ties: 1994
Jul 1990–Dec 1991
18-Month
66.37°F
(19.09°C)
65.55°F
(18.64°C)
0.82°F
(0.45°C)
97th Coolest
Coolest since:
1912
30th Warmest
Warmest since:
2012
Ties: 2001
Jan 1990–Dec 1991
24-Month
65.22°F
(18.46°C)
64.00°F
(17.78°C)
1.22°F
(0.68°C)
109th Coolest
Coolest since:
1913
18th Warmest
Warmest since:
2017
Ties: 1935
Jan 1989–Dec 1991
36-Month
64.80°F
(18.22°C)
63.98°F
(17.77°C)
0.82°F
(0.45°C)
92nd Coolest
Coolest since:
1905
34th Warmest
Warmest since:
2017
Jan 1988–Dec 1991
48-Month
64.90°F
(18.28°C)
63.98°F
(17.77°C)
0.92°F
(0.51°C)
99th Coolest
Coolest since:
1906
26th Warmest
Warmest since:
2018
Ties: 1935
Jan 1987–Dec 1991
60-Month
64.98°F
(18.32°C)
63.96°F
(17.76°C)
1.02°F
(0.56°C)
99th Coolest
Coolest since:
1907
25th Warmest
Warmest since:
2016

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