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.

California River Basin

Average Temperature Rankings, May 2017

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
May 2017
1-Month
63.5°F
(17.5°C)
60.7°F
(15.9°C)
2.8°F
(1.6°C)
102nd Coolest
Coolest since:
1977
27th Warmest
Warmest since:
2001
Ties: 1987
Apr–May 2017
2-Month
59.6°F
(15.3°C)
57.4°F
(14.1°C)
2.2°F
(1.2°C)
98th Coolest
Coolest since:
1967
31st Warmest
Warmest since:
1992
Mar–May 2017
3-Month
57.5°F
(14.2°C)
54.5°F
(12.5°C)
3.0°F
(1.7°C)
115th Coolest
Coolest since:
1917
14th Warmest
Warmest since:
1934
Ties: 1947, 2016
Feb–May 2017
4-Month
54.9°F
(12.7°C)
52.2°F
(11.2°C)
2.7°F
(1.5°C)
116th Coolest
Coolest since:
1917
13th Warmest
Warmest since:
1934
Ties: 1996
Jan–May 2017
5-Month
52.4°F
(11.3°C)
50.2°F
(10.1°C)
2.2°F
(1.2°C)
108th Coolest
Coolest since:
1917
21st Warmest
Warmest since:
2015
Dec 2016–May 2017
6-Month
50.9°F
(10.5°C)
49.1°F
(9.5°C)
1.8°F
(1.0°C)
105th Coolest
Coolest since:
1917
23rd Warmest
Warmest since:
2015
Ties: 2001
Nov 2016–May 2017
7-Month
51.1°F
(10.6°C)
49.1°F
(9.5°C)
2.0°F
(1.1°C)
109th Coolest
Coolest since:
1917
19th Warmest
Warmest since:
2015
Oct 2016–May 2017
8-Month
52.3°F
(11.3°C)
50.4°F
(10.2°C)
1.9°F
(1.1°C)
109th Coolest
Coolest since:
1917
19th Warmest
Warmest since:
2015
Sep 2016–May 2017
9-Month
54.2°F
(12.3°C)
52.4°F
(11.3°C)
1.8°F
(1.0°C)
108th Coolest
Coolest since:
1917
20th Warmest
Warmest since:
2015
Aug 2016–May 2017
10-Month
56.4°F
(13.6°C)
54.6°F
(12.6°C)
1.8°F
(1.0°C)
110th Coolest
Coolest since:
1917
18th Warmest
Warmest since:
2015
Jul 2016–May 2017
11-Month
58.3°F
(14.6°C)
56.4°F
(13.6°C)
1.9°F
(1.0°C)
111th Coolest
Coolest since:
1917
17th Warmest
Warmest since:
2015
Ties: 2020
Jun 2016–May 2017
12-Month
59.5°F
(15.3°C)
57.4°F
(14.1°C)
2.1°F
(1.2°C)
114th Coolest
Coolest since:
1917
14th Warmest
Warmest since:
2015
Dec 2015–May 2017
18-Month
57.0°F
(13.9°C)
54.6°F
(12.6°C)
2.4°F
(1.3°C)
119th Coolest
Coolest since:
1917
8th Warmest
Warmest since:
2015
Jun 2015–May 2017
24-Month
59.8°F
(15.4°C)
57.4°F
(14.1°C)
2.4°F
(1.3°C)
120th Coolest
Coolest since:
1913, 1917
7th Warmest
Warmest since:
2015
Ties: 1997, 2019
Jun 2014–May 2017
36-Month
60.4°F
(15.8°C)
57.4°F
(14.1°C)
3.0°F
(1.7°C)
123rd Coolest
Coolest since:
1913, 1917
3rd Warmest
Warmest since:
2016
Jun 2013–May 2017
48-Month
60.4°F
(15.8°C)
57.4°F
(14.1°C)
3.0°F
(1.7°C)
124th Coolest
Coolest since:
1913
1st Warmest
Warmest since:
2016, 2017, 2018
Ties: 2016, 2018
Jun 2012–May 2017
60-Month
60.2°F
(15.7°C)
57.3°F
(14.1°C)
2.9°F
(1.6°C)
122nd Coolest
Coolest since:
1913, 1917
2nd Warmest
Warmest to Date
2018
Ties: 2019

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