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, April 2018

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
April 2018
1-Month
0.56"
(14.22mm)
1.06"
(26.92mm)
-0.50"
(-12.70mm)
21st Driest
Driest since:
1989
108th Wettest
Wettest since:
1900
Mar–Apr 2018
2-Month
1.23"
(31.24mm)
2.21"
(56.13mm)
-0.98"
(-24.89mm)
14th Driest
Driest since:
1972
115th Wettest
Wettest since:
1905
Feb–Apr 2018
3-Month
2.17"
(55.12mm)
3.21"
(81.53mm)
-1.04"
(-26.41mm)
22nd Driest
Driest since:
1972
107th Wettest
Wettest since:
1905
Jan–Apr 2018
4-Month
2.73"
(69.34mm)
4.20"
(106.68mm)
-1.47"
(-37.34mm)
16th Driest
Driest since:
1972
113th Wettest
Wettest since:
1905
Dec 2017–Apr 2018
5-Month
2.97"
(75.44mm)
5.21"
(132.33mm)
-2.24"
(-56.89mm)
4th Driest
Driest since:
2002
124th Wettest
Wettest since:
1905
Nov 2017–Apr 2018
6-Month
3.24"
(82.30mm)
6.10"
(154.94mm)
-2.86"
(-72.64mm)
2nd Driest
Driest since:
1904
126th Wettest
Wettest since:
1941
Oct 2017–Apr 2018
7-Month
3.82"
(97.03mm)
7.23"
(183.64mm)
-3.41"
(-86.61mm)
2nd Driest
Driest since:
1904
126th Wettest
Wettest since:
1941
Ties: 2002
Sep 2017–Apr 2018
8-Month
5.47"
(138.94mm)
8.60"
(218.44mm)
-3.13"
(-79.50mm)
6th Driest
Driest since:
2002
122nd Wettest
Wettest since:
1941
Ties: 1954
Aug 2017–Apr 2018
9-Month
7.35"
(186.69mm)
10.61"
(269.49mm)
-3.26"
(-82.80mm)
8th Driest
Driest since:
2021
120th Wettest
Wettest since:
1905
Jul 2017–Apr 2018
10-Month
9.92"
(251.97mm)
12.48"
(316.99mm)
-2.56"
(-65.02mm)
15th Driest
Driest since:
2021
113th Wettest
Wettest since:
1905
Jun 2017–Apr 2018
11-Month
10.41"
(264.41mm)
13.41"
(340.61mm)
-3.00"
(-76.20mm)
12th Driest
Driest since:
2021
116th Wettest
Wettest since:
1905
May 2017–Apr 2018
12-Month
11.55"
(293.37mm)
14.53"
(369.06mm)
-2.98"
(-75.69mm)
13th Driest
Driest since:
2021
115th Wettest
Wettest since:
1942
Nov 2016–Apr 2018
18-Month
19.45"
(494.03mm)
20.64"
(524.26mm)
-1.19"
(-30.23mm)
48th Driest
Driest since:
2021
79th Wettest
Wettest since:
1942
May 2016–Apr 2018
24-Month
27.06"
(687.32mm)
29.05"
(737.87mm)
-1.99"
(-50.55mm)
40th Driest
Driest since:
2022
87th Wettest
Wettest since:
1942
May 2015–Apr 2018
36-Month
44.61"
(1,133.09mm)
43.55"
(1,106.17mm)
1.06"
(26.92mm)
86th Driest
Driest since:
1904
40th Wettest
Wettest since:
1907
May 2014–Apr 2018
48-Month
60.09"
(1,526.29mm)
58.02"
(1,473.71mm)
2.07"
(52.58mm)
87th Driest
Driest since:
1904
38th Wettest
Wettest since:
1986
May 2013–Apr 2018
60-Month
74.19"
(1,884.43mm)
72.49"
(1,841.25mm)
1.70"
(43.18mm)
83rd Driest
Driest since:
1957
41st Wettest
Wettest since:
1987

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