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 2022

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 2022
1-Month
0.58"
(14.73mm)
1.11"
(28.19mm)
-0.53"
(-13.46mm)
19th Driest
Driest since:
1974
110th Wettest
Wettest since:
2015
Ties: 1916, 1998
Apr–May 2022
2-Month
0.90"
(22.86mm)
2.17"
(55.12mm)
-1.27"
(-32.26mm)
4th Driest
Driest since:
2002
125th Wettest
Wettest since:
1941
Mar–May 2022
3-Month
1.73"
(43.94mm)
3.33"
(84.58mm)
-1.60"
(-40.64mm)
6th Driest
Driest since:
2002
123rd Wettest
Wettest since:
1941
Ties: 2012
Feb–May 2022
4-Month
2.25"
(57.15mm)
4.33"
(109.98mm)
-2.08"
(-52.83mm)
4th Driest
Driest since:
2002
125th Wettest
Wettest since:
1905
Jan–May 2022
5-Month
2.69"
(68.33mm)
5.31"
(134.87mm)
-2.62"
(-66.54mm)
3rd Driest
Driest since:
1972
126th Wettest
Wettest since:
1905
Dec 2021–May 2022
6-Month
4.18"
(106.17mm)
6.32"
(160.53mm)
-2.14"
(-54.36mm)
7th Driest
Driest since:
2002
121st Wettest
Wettest since:
1905
Nov 2021–May 2022
7-Month
4.36"
(110.74mm)
7.21"
(183.13mm)
-2.85"
(-72.39mm)
6th Driest
Driest since:
2002
122nd Wettest
Wettest since:
1941
Oct 2021–May 2022
8-Month
5.44"
(138.18mm)
8.34"
(211.84mm)
-2.90"
(-73.66mm)
7th Driest
Driest since:
2002
121st Wettest
Wettest since:
1941
Sep 2021–May 2022
9-Month
6.63"
(168.40mm)
9.71"
(246.63mm)
-3.08"
(-78.23mm)
10th Driest
Driest since:
2002
118th Wettest
Wettest since:
1941
Aug 2021–May 2022
10-Month
8.66"
(219.96mm)
11.72"
(297.69mm)
-3.06"
(-77.73mm)
16th Driest
Driest since:
2002
112th Wettest
Wettest since:
1941
Jul 2021–May 2022
11-Month
11.40"
(289.56mm)
13.59"
(345.19mm)
-2.19"
(-55.63mm)
26th Driest
Driest since:
2021
102nd Wettest
Wettest since:
1941
Jun 2021–May 2022
12-Month
12.29"
(312.17mm)
14.53"
(369.06mm)
-2.24"
(-56.89mm)
27th Driest
Driest since:
2021
101st Wettest
Wettest since:
1905
Dec 2020–May 2022
18-Month
17.07"
(433.58mm)
20.86"
(529.84mm)
-3.79"
(-96.26mm)
16th Driest
Driest since:
2021
111th Wettest
Wettest since:
1942
Jun 2020–May 2022
24-Month
21.08"
(535.43mm)
29.05"
(737.87mm)
-7.97"
(-202.44mm)
2nd Driest
Driest since:
2021
125th Wettest
Wettest since:
1942
Jun 2019–May 2022
36-Month
33.31"
(846.07mm)
43.54"
(1,105.92mm)
-10.23"
(-259.85mm)
1st Driest
Driest since:
2022
125th Wettest
Wettest since:
1907
Jun 2018–May 2022
48-Month
50.16"
(1,274.06mm)
58.01"
(1,473.45mm)
-7.85"
(-199.39mm)
9th Driest
Driest since:
1904
116th Wettest
Wettest since:
1986
Jun 2017–May 2022
60-Month
61.35"
(1,558.29mm)
72.48"
(1,840.99mm)
-11.13"
(-282.70mm)
4th Driest
Driest since:
1957
120th Wettest
Wettest since:
1987

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