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 2021

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 2021
1-Month
0.55"
(13.97mm)
1.06"
(26.92mm)
-0.51"
(-12.95mm)
18th Driest
Driest since:
1989
111th Wettest
Wettest since:
1900
Ties: 1991, 1996
Mar–Apr 2021
2-Month
1.64"
(41.66mm)
2.21"
(56.13mm)
-0.57"
(-14.47mm)
36th Driest
Driest since:
1972
93rd Wettest
Wettest since:
1905
Feb–Apr 2021
3-Month
2.28"
(57.91mm)
3.21"
(81.53mm)
-0.93"
(-23.62mm)
29th Driest
Driest since:
1972
100th Wettest
Wettest since:
1905
Ties: 2006
Jan–Apr 2021
4-Month
3.10"
(78.74mm)
4.20"
(106.68mm)
-1.10"
(-27.94mm)
27th Driest
Driest since:
1972
102nd Wettest
Wettest since:
1905
Ties: 2009
Dec 2020–Apr 2021
5-Month
3.66"
(92.96mm)
5.21"
(132.33mm)
-1.55"
(-39.37mm)
18th Driest
Driest since:
2002
110th Wettest
Wettest since:
1905
Nov 2020–Apr 2021
6-Month
4.16"
(105.66mm)
6.10"
(154.94mm)
-1.94"
(-49.28mm)
14th Driest
Driest since:
1904
114th Wettest
Wettest since:
1941
Oct 2020–Apr 2021
7-Month
4.56"
(115.82mm)
7.23"
(183.64mm)
-2.67"
(-67.82mm)
6th Driest
Driest since:
1904
122nd Wettest
Wettest since:
1941
Sep 2020–Apr 2021
8-Month
5.11"
(129.79mm)
8.60"
(218.44mm)
-3.49"
(-88.65mm)
3rd Driest
Driest since:
2002
125th Wettest
Wettest since:
1941
Aug 2020–Apr 2021
9-Month
5.70"
(144.78mm)
10.61"
(269.49mm)
-4.91"
(-124.71mm)
1st Driest
Driest since:
2021
127th Wettest
Wettest since:
1905
Jul 2020–Apr 2021
10-Month
7.06"
(179.32mm)
12.48"
(316.99mm)
-5.42"
(-137.67mm)
1st Driest
Driest since:
2021
127th Wettest
Wettest since:
1905
Jun 2020–Apr 2021
11-Month
7.67"
(194.82mm)
13.41"
(340.61mm)
-5.74"
(-145.79mm)
1st Driest
Driest since:
2021
127th Wettest
Wettest since:
1905
May 2020–Apr 2021
12-Month
8.08"
(205.23mm)
14.53"
(369.06mm)
-6.45"
(-163.83mm)
1st Driest
Driest since:
2021
127th Wettest
Wettest since:
1942
Nov 2019–Apr 2021
18-Month
14.90"
(378.46mm)
20.64"
(524.26mm)
-5.74"
(-145.80mm)
1st Driest
Driest since:
2021
126th Wettest
Wettest since:
1942
May 2019–Apr 2021
24-Month
21.71"
(551.43mm)
29.05"
(737.87mm)
-7.34"
(-186.44mm)
2nd Driest
Driest since:
2022
125th Wettest
Wettest since:
1942
May 2018–Apr 2021
36-Month
37.53"
(953.26mm)
43.55"
(1,106.17mm)
-6.02"
(-152.91mm)
13th Driest
Driest since:
1904
113th Wettest
Wettest since:
1907
May 2017–Apr 2021
48-Month
49.08"
(1,246.63mm)
58.02"
(1,473.71mm)
-8.94"
(-227.08mm)
7th Driest
Driest since:
1904
118th Wettest
Wettest since:
1986
May 2016–Apr 2021
60-Month
64.59"
(1,640.59mm)
72.49"
(1,841.25mm)
-7.90"
(-200.66mm)
12th Driest
Driest since:
1957
112th Wettest
Wettest since:
1987

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