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.

Southwest Climate Region

Precipitation Rankings, May 2015

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
May 2015
1-Month
2.93"
(74.42mm)
1.11"
(28.19mm)
1.82"
(46.23mm)
128th Driest
Driest since:
1974
1st Wettest
Wettest to Date
2015
Apr–May 2015
2-Month
3.91"
(99.31mm)
2.17"
(55.12mm)
1.74"
(44.19mm)
125th Driest
Driest since:
2002
4th Wettest
Wettest since:
1941
Mar–May 2015
3-Month
4.80"
(121.92mm)
3.33"
(84.58mm)
1.47"
(37.34mm)
121st Driest
Driest since:
2002
8th Wettest
Wettest since:
1941
Feb–May 2015
4-Month
5.64"
(143.26mm)
4.33"
(109.98mm)
1.31"
(33.28mm)
113th Driest
Driest since:
2002
16th Wettest
Wettest since:
1905
Jan–May 2015
5-Month
6.87"
(174.50mm)
5.31"
(134.87mm)
1.56"
(39.63mm)
115th Driest
Driest since:
1972
14th Wettest
Wettest since:
1905
Dec 2014–May 2015
6-Month
8.05"
(204.47mm)
6.32"
(160.53mm)
1.73"
(43.94mm)
111th Driest
Driest since:
2002
17th Wettest
Wettest since:
1905
Ties: 1906
Nov 2014–May 2015
7-Month
8.68"
(220.47mm)
7.21"
(183.13mm)
1.47"
(37.34mm)
104th Driest
Driest since:
2002
24th Wettest
Wettest since:
1941
Oct 2014–May 2015
8-Month
9.34"
(237.24mm)
8.34"
(211.84mm)
1.00"
(25.40mm)
97th Driest
Driest since:
2002
31st Wettest
Wettest since:
1941
Ties: 1957
Sep 2014–May 2015
9-Month
11.95"
(303.53mm)
9.71"
(246.63mm)
2.24"
(56.90mm)
109th Driest
Driest since:
2002
19th Wettest
Wettest since:
1941
Aug 2014–May 2015
10-Month
14.54"
(369.32mm)
11.72"
(297.69mm)
2.82"
(71.63mm)
114th Driest
Driest since:
2002
14th Wettest
Wettest since:
1941
Jul 2014–May 2015
11-Month
16.86"
(428.24mm)
13.59"
(345.19mm)
3.27"
(83.05mm)
116th Driest
Driest since:
2021
12th Wettest
Wettest since:
1941
Jun 2014–May 2015
12-Month
17.36"
(440.94mm)
14.53"
(369.06mm)
2.83"
(71.88mm)
112th Driest
Driest since:
2021
16th Wettest
Wettest since:
1905
Dec 2013–May 2015
18-Month
21.60"
(548.64mm)
20.86"
(529.84mm)
0.74"
(18.80mm)
92nd Driest
Driest since:
2021
35th Wettest
Wettest since:
1942
Ties: 1988
Jun 2013–May 2015
24-Month
31.86"
(809.24mm)
29.05"
(737.87mm)
2.81"
(71.37mm)
104th Driest
Driest since:
2021
23rd Wettest
Wettest since:
1942
Jun 2012–May 2015
36-Month
42.53"
(1,080.26mm)
43.54"
(1,105.92mm)
-1.01"
(-25.66mm)
59th Driest
Driest since:
2022
67th Wettest
Wettest since:
1907
Jun 2011–May 2015
48-Month
53.89"
(1,368.81mm)
58.01"
(1,473.45mm)
-4.12"
(-104.64mm)
31st Driest
Driest since:
1904
94th Wettest
Wettest since:
1986
Ties: 1937
Jun 2010–May 2015
60-Month
67.86"
(1,723.64mm)
72.48"
(1,840.99mm)
-4.62"
(-117.35mm)
30th Driest
Driest since:
1957
94th Wettest
Wettest since:
1987

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