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.

West Climate Region

Precipitation Rankings, May 2004

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 2004
1-Month
0.51"
(12.95mm)
0.92"
(23.37mm)
-0.41"
(-10.42mm)
35th Driest
Driest since:
1924
94th Wettest
Wettest since:
1998
Ties: 1965, 2002
Apr–May 2004
2-Month
1.34"
(34.04mm)
2.26"
(57.40mm)
-0.92"
(-23.36mm)
21st Driest
Driest since:
1909
108th Wettest
Wettest since:
1896
Mar–May 2004
3-Month
2.12"
(53.85mm)
4.59"
(116.59mm)
-2.47"
(-62.74mm)
8th Driest
Driest since:
2008
121st Wettest
Wettest since:
1995
Feb–May 2004
4-Month
6.25"
(158.75mm)
7.31"
(185.67mm)
-1.06"
(-26.92mm)
50th Driest
Driest since:
1997
79th Wettest
Wettest since:
1998
Jan–May 2004
5-Month
7.80"
(198.12mm)
10.29"
(261.37mm)
-2.49"
(-63.25mm)
35th Driest
Driest since:
2022
94th Wettest
Wettest since:
1998
Dec 2003–May 2004
6-Month
11.90"
(302.26mm)
12.84"
(326.14mm)
-0.94"
(-23.88mm)
64th Driest
Driest since:
1924
64th Wettest
Wettest since:
1995
Nov 2003–May 2004
7-Month
13.69"
(347.73mm)
14.71"
(373.63mm)
-1.02"
(-25.90mm)
61st Driest
Driest since:
1977
67th Wettest
Wettest since:
1995
Oct 2003–May 2004
8-Month
13.79"
(350.27mm)
15.74"
(399.80mm)
-1.95"
(-49.53mm)
53rd Driest
Driest since:
1977
75th Wettest
Wettest since:
1983
Sep 2003–May 2004
9-Month
14.02"
(356.11mm)
16.23"
(412.24mm)
-2.21"
(-56.13mm)
52nd Driest
Driest since:
2021
76th Wettest
Wettest since:
1983
Aug 2003–May 2004
10-Month
14.83"
(376.68mm)
16.62"
(422.15mm)
-1.79"
(-45.47mm)
57th Driest
Driest since:
2021
71st Wettest
Wettest since:
1983
Jul 2003–May 2004
11-Month
15.17"
(385.32mm)
16.95"
(430.53mm)
-1.78"
(-45.21mm)
57th Driest
Driest since:
2021
71st Wettest
Wettest since:
1983
Jun 2003–May 2004
12-Month
15.23"
(386.84mm)
17.44"
(442.98mm)
-2.21"
(-56.14mm)
51st Driest
Driest since:
2021
77th Wettest
Wettest since:
1983
Dec 2002–May 2004
18-Month
29.69"
(754.13mm)
30.25"
(768.35mm)
-0.56"
(-14.22mm)
67th Driest
Driest since:
1977
60th Wettest
Wettest since:
1983
Jun 2002–May 2004
24-Month
32.72"
(831.09mm)
34.89"
(886.21mm)
-2.17"
(-55.12mm)
50th Driest
Driest since:
2022
77th Wettest
Wettest since:
1983
Jun 2001–May 2004
36-Month
46.36"
(1,177.54mm)
52.30"
(1,328.42mm)
-5.94"
(-150.88mm)
36th Driest
Driest since:
2022
90th Wettest
Wettest since:
1984
Jun 2000–May 2004
48-Month
59.78"
(1,518.41mm)
69.56"
(1,766.82mm)
-9.78"
(-248.41mm)
19th Driest
Driest since:
2015
106th Wettest
Wettest since:
1998
Jun 1999–May 2004
60-Month
76.09"
(1,932.69mm)
86.83"
(2,205.48mm)
-10.74"
(-272.79mm)
15th Driest
Driest since:
1933
109th Wettest
Wettest since:
1999

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