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, April 2015

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PeriodValue1901-2000
Mean
AnomalyRank
(1895-2023)
Warmest/Coolest
Since
Record
April 2015
1-Month
56.7°F
(13.7°C)
54.0°F
(12.2°C)
2.7°F
(1.5°C)
104th Coolest
Coolest since:
1967
26th Warmest
Warmest since:
1989
Mar–Apr 2015
2-Month
56.8°F
(13.8°C)
51.4°F
(10.8°C)
5.4°F
(3.0°C)
127th Coolest
Coolest since:
1967
3rd Warmest
Warmest since:
1934
Feb–Apr 2015
3-Month
55.6°F
(13.1°C)
49.4°F
(9.7°C)
6.2°F
(3.4°C)
129th Coolest
Coolest since:
1922
1st Warmest
Warmest to Date
2015
Jan–Apr 2015
4-Month
53.9°F
(12.2°C)
47.6°F
(8.7°C)
6.3°F
(3.5°C)
129th Coolest
Coolest since:
1922
1st Warmest
Warmest to Date
2015
Dec 2014–Apr 2015
5-Month
52.4°F
(11.3°C)
46.7°F
(8.2°C)
5.7°F
(3.1°C)
128th Coolest
Coolest since:
1917, 1949
1st Warmest
Warmest to Date
2015
Nov 2014–Apr 2015
6-Month
52.6°F
(11.4°C)
47.2°F
(8.4°C)
5.4°F
(3.0°C)
128th Coolest
Coolest since:
1917
1st Warmest
Warmest to Date
2015
Oct 2014–Apr 2015
7-Month
54.2°F
(12.3°C)
48.9°F
(9.4°C)
5.3°F
(2.9°C)
128th Coolest
Coolest since:
1917
1st Warmest
Warmest to Date
2015
Sep 2014–Apr 2015
8-Month
56.5°F
(13.6°C)
51.4°F
(10.8°C)
5.1°F
(2.8°C)
128th Coolest
Coolest since:
1917
1st Warmest
Warmest to Date
2015
Aug 2014–Apr 2015
9-Month
58.5°F
(14.7°C)
53.9°F
(12.2°C)
4.6°F
(2.5°C)
128th Coolest
Coolest since:
1917
1st Warmest
Warmest to Date
2015
Jul 2014–Apr 2015
10-Month
60.5°F
(15.8°C)
56.0°F
(13.3°C)
4.5°F
(2.5°C)
128th Coolest
Coolest since:
1917
1st Warmest
Warmest to Date
2015
Jun 2014–Apr 2015
11-Month
61.6°F
(16.4°C)
57.1°F
(13.9°C)
4.5°F
(2.5°C)
128th Coolest
Coolest since:
1917
1st Warmest
Warmest to Date
2015
May 2014–Apr 2015
12-Month
61.8°F
(16.6°C)
57.4°F
(14.1°C)
4.4°F
(2.5°C)
128th Coolest
Coolest since:
1917
1st Warmest
Warmest to Date
2015
Nov 2013–Apr 2015
18-Month
58.3°F
(14.6°C)
54.0°F
(12.2°C)
4.3°F
(2.4°C)
127th Coolest
Coolest since:
1949
1st Warmest
Warmest to Date
2015
May 2013–Apr 2015
24-Month
61.1°F
(16.2°C)
57.4°F
(14.1°C)
3.7°F
(2.1°C)
127th Coolest
Coolest since:
1913
1st Warmest
Warmest to Date
2015
May 2012–Apr 2015
36-Month
60.6°F
(15.9°C)
57.4°F
(14.1°C)
3.2°F
(1.8°C)
125th Coolest
Coolest since:
1913, 1917
2nd Warmest
Warmest to Date
2016
May 2011–Apr 2015
48-Month
59.9°F
(15.5°C)
57.4°F
(14.1°C)
2.5°F
(1.4°C)
122nd Coolest
Coolest since:
1913
4th Warmest
Warmest to Date
2016, 2018
Ties: 2019, 2021, 2022
May 2010–Apr 2015
60-Month
59.5°F
(15.3°C)
57.3°F
(14.1°C)
2.2°F
(1.2°C)
116th Coolest
Coolest since:
1913
9th Warmest
Warmest to Date
2018

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