Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. 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 1917

View Period (Months):
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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
May 1917
1-Month
55.5°F
(13.1°C)
60.7°F
(15.9°C)
-5.2°F
(-2.8°C)
5th Coolest
Coolest since:
1977
124th Warmest
Warmest since:
2001
Apr–May 1917
2-Month
53.4°F
(11.9°C)
57.3°F
(14.1°C)
-3.9°F
(-2.2°C)
3rd Coolest
Coolest since:
1967
126th Warmest
Warmest since:
1992
Mar–May 1917
3-Month
50.2°F
(10.1°C)
54.5°F
(12.5°C)
-4.3°F
(-2.4°C)
1st Coolest
Coolest since:
1917
128th Warmest
Warmest since:
1934
Feb–May 1917
4-Month
48.4°F
(9.1°C)
52.3°F
(11.3°C)
-3.9°F
(-2.2°C)
1st Coolest
Coolest since:
1917
128th Warmest
Warmest since:
1934
Jan–May 1917
5-Month
46.0°F
(7.8°C)
50.2°F
(10.1°C)
-4.2°F
(-2.3°C)
1st Coolest
Coolest since:
1917
128th Warmest
Warmest since:
2015
Dec 1916–May 1917
6-Month
44.9°F
(7.2°C)
49.0°F
(9.4°C)
-4.1°F
(-2.2°C)
1st Coolest
Coolest since:
1917
127th Warmest
Warmest since:
2015
Nov 1916–May 1917
7-Month
45.0°F
(7.2°C)
49.1°F
(9.5°C)
-4.1°F
(-2.3°C)
1st Coolest
Coolest since:
1917
127th Warmest
Warmest since:
2015
Oct 1916–May 1917
8-Month
46.1°F
(7.8°C)
50.4°F
(10.2°C)
-4.3°F
(-2.4°C)
1st Coolest
Coolest since:
1917
127th Warmest
Warmest since:
2015
Sep 1916–May 1917
9-Month
48.4°F
(9.1°C)
52.4°F
(11.3°C)
-4.0°F
(-2.2°C)
1st Coolest
Coolest since:
1917
127th Warmest
Warmest since:
2015
Aug 1916–May 1917
10-Month
50.8°F
(10.4°C)
54.6°F
(12.6°C)
-3.8°F
(-2.2°C)
1st Coolest
Coolest since:
1917
127th Warmest
Warmest since:
2015
Jul 1916–May 1917
11-Month
52.7°F
(11.5°C)
56.3°F
(13.5°C)
-3.6°F
(-2.0°C)
1st Coolest
Coolest since:
1917
127th Warmest
Warmest since:
2015
Jun 1916–May 1917
12-Month
53.9°F
(12.2°C)
57.4°F
(14.1°C)
-3.5°F
(-1.9°C)
1st Coolest
Coolest since:
1917
127th Warmest
Warmest since:
2015
Dec 1915–May 1917
18-Month
52.2°F
(11.2°C)
54.6°F
(12.6°C)
-2.4°F
(-1.4°C)
1st Coolest
Coolest since:
1917
126th Warmest
Warmest since:
2015
Jun 1915–May 1917
24-Month
55.4°F
(13.0°C)
57.3°F
(14.1°C)
-1.9°F
(-1.1°C)
1st Coolest
Coolest since:
1913, 1917
126th Warmest
Warmest since:
2015
Ties: 1913
Jun 1914–May 1917
36-Month
55.8°F
(13.2°C)
57.4°F
(14.1°C)
-1.6°F
(-0.9°C)
1st Coolest
Coolest since:
1913, 1917
125th Warmest
Warmest since:
2016
Ties: 1913
Jun 1913–May 1917
48-Month
56.3°F
(13.5°C)
57.3°F
(14.1°C)
-1.0°F
(-0.6°C)
2nd Coolest
Coolest since:
1913
123rd Warmest
Warmest since:
2016, 2017, 2018
Ties: 1912, 1914, 1915, 1918, 1920
Jun 1912–May 1917
60-Month
56.1°F
(13.4°C)
57.3°F
(14.1°C)
-1.2°F
(-0.7°C)
1st Coolest
Coolest since:
1913, 1917
123rd Warmest
Warmest since:
2018
Ties: 1913

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