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 2018

View Period (Months):
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  • Record Coolest
  • Bottom 1/10
  • Bottom 1/3
  • Normal
  • Top 1/3
  • Top 1/10
  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
December 2018
1-Month
44.78°F
(7.10°C)
42.76°F
(5.98°C)
2.02°F
(1.12°C)
96th Coolest
Coolest since:
1983
33rd Warmest
Warmest since:
2021
Nov–Dec 2018
2-Month
47.47°F
(8.59°C)
47.73°F
(8.74°C)
-0.26°F
(-0.15°C)
51st Coolest
Coolest since:
2000
78th Warmest
Warmest since:
1999
Ties: 1940
Oct–Dec 2018
3-Month
53.11°F
(11.73°C)
54.09°F
(12.27°C)
-0.98°F
(-0.54°C)
28th Coolest
Coolest since:
1972
101st Warmest
Warmest since:
1999
Ties: 2013
Sep–Dec 2018
4-Month
59.67°F
(15.37°C)
60.02°F
(15.57°C)
-0.35°F
(-0.20°C)
49th Coolest
Coolest since:
1972
80th Warmest
Warmest since:
2021
Aug–Dec 2018
5-Month
64.93°F
(18.29°C)
65.05°F
(18.36°C)
-0.12°F
(-0.07°C)
57th Coolest
Coolest since:
1972
72nd Warmest
Warmest since:
2021
Jul–Dec 2018
6-Month
68.81°F
(20.45°C)
68.65°F
(20.36°C)
0.16°F
(0.09°C)
70th Coolest
Coolest since:
1972
59th Warmest
Warmest since:
2021
Jun–Dec 2018
7-Month
71.00°F
(21.67°C)
70.46°F
(21.37°C)
0.54°F
(0.30°C)
89th Coolest
Coolest since:
1972
40th Warmest
Warmest since:
2021
Ties: 1901, 1960
May–Dec 2018
8-Month
71.93°F
(22.18°C)
70.78°F
(21.54°C)
1.15°F
(0.64°C)
103rd Coolest
Coolest since:
1972
26th Warmest
Warmest since:
2021
Apr–Dec 2018
9-Month
70.81°F
(21.56°C)
69.97°F
(21.09°C)
0.84°F
(0.47°C)
94th Coolest
Coolest since:
1972
35th Warmest
Warmest since:
2021
Mar–Dec 2018
10-Month
69.13°F
(20.63°C)
68.27°F
(20.15°C)
0.86°F
(0.48°C)
93rd Coolest
Coolest since:
1912
36th Warmest
Warmest since:
2012
Feb–Dec 2018
11-Month
67.09°F
(19.49°C)
66.14°F
(18.97°C)
0.95°F
(0.52°C)
97th Coolest
Coolest since:
1912
32nd Warmest
Warmest since:
2012
Ties: 2003
Jan–Dec 2018
12-Month
65.09°F
(18.38°C)
64.00°F
(17.78°C)
1.09°F
(0.60°C)
99th Coolest
Coolest since:
1912
30th Warmest
Warmest since:
2012
Jul 2017–Dec 2018
18-Month
66.79°F
(19.33°C)
65.56°F
(18.64°C)
1.23°F
(0.69°C)
111th Coolest
Coolest since:
1912
17th Warmest
Warmest since:
2012
Jan 2017–Dec 2018
24-Month
65.72°F
(18.73°C)
64.00°F
(17.78°C)
1.72°F
(0.95°C)
115th Coolest
Coolest since:
1913
13th Warmest
Warmest since:
2017
Jan 2016–Dec 2018
36-Month
66.04°F
(18.91°C)
63.98°F
(17.77°C)
2.06°F
(1.14°C)
124th Coolest
Coolest since:
1905
3rd Warmest
Warmest since:
2017
Jan 2015–Dec 2018
48-Month
66.05°F
(18.92°C)
63.97°F
(17.76°C)
2.08°F
(1.16°C)
125th Coolest
Coolest since:
1906
1st Warmest
Warmest to Date
2018
Jan 2014–Dec 2018
60-Month
65.71°F
(18.73°C)
63.97°F
(17.76°C)
1.74°F
(0.97°C)
123rd Coolest
Coolest since:
1907
2nd Warmest
Warmest since:
2016
Ties: 2020

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