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 1903

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
May 1903
1-Month
0.50"
(12.70mm)
0.92"
(23.37mm)
-0.42"
(-10.67mm)
30th Driest
Driest since:
1924
99th Wettest
Wettest since:
1998
Ties: 1919, 1928, 1940, 1999
Apr–May 1903
2-Month
1.36"
(34.54mm)
2.26"
(57.40mm)
-0.90"
(-22.86mm)
22nd Driest
Driest since:
1909
107th Wettest
Wettest since:
1896
Mar–May 1903
3-Month
4.99"
(126.75mm)
4.59"
(116.59mm)
0.40"
(10.16mm)
82nd Driest
Driest since:
2008
47th Wettest
Wettest since:
1995
Feb–May 1903
4-Month
6.27"
(159.26mm)
7.31"
(185.67mm)
-1.04"
(-26.41mm)
51st Driest
Driest since:
1997
78th Wettest
Wettest since:
1998
Ties: 1895, 1989
Jan–May 1903
5-Month
9.77"
(248.16mm)
10.29"
(261.37mm)
-0.52"
(-13.21mm)
68th Driest
Driest since:
2022
61st Wettest
Wettest since:
1998
Dec 1902–May 1903
6-Month
11.94"
(303.28mm)
12.84"
(326.14mm)
-0.90"
(-22.86mm)
66th Driest
Driest since:
1924
62nd Wettest
Wettest since:
1995
Ties: 1908
Nov 1902–May 1903
7-Month
14.79"
(375.67mm)
14.71"
(373.63mm)
0.08"
(2.04mm)
77th Driest
Driest since:
1977
51st Wettest
Wettest since:
1995
Ties: 1905
Oct 1902–May 1903
8-Month
15.92"
(404.37mm)
15.74"
(399.80mm)
0.18"
(4.57mm)
72nd Driest
Driest since:
1977
56th Wettest
Wettest since:
1983
Sep 1902–May 1903
9-Month
16.09"
(408.69mm)
16.23"
(412.24mm)
-0.14"
(-3.55mm)
70th Driest
Driest since:
2021
58th Wettest
Wettest since:
1983
Aug 1902–May 1903
10-Month
16.31"
(414.27mm)
16.62"
(422.15mm)
-0.31"
(-7.88mm)
68th Driest
Driest since:
2021
60th Wettest
Wettest since:
1983
Jul 1902–May 1903
11-Month
16.72"
(424.69mm)
16.95"
(430.53mm)
-0.23"
(-5.84mm)
68th Driest
Driest since:
2021
60th Wettest
Wettest since:
1983
Jun 1902–May 1903
12-Month
16.79"
(426.47mm)
17.44"
(442.98mm)
-0.65"
(-16.51mm)
64th Driest
Driest since:
2021
64th Wettest
Wettest since:
1983
Dec 1901–May 1903
18-Month
29.22"
(742.19mm)
30.25"
(768.35mm)
-1.03"
(-26.16mm)
63rd Driest
Driest since:
1977
64th Wettest
Wettest since:
1983
Jun 1901–May 1903
24-Month
34.13"
(866.90mm)
34.89"
(886.21mm)
-0.76"
(-19.31mm)
60th Driest
Driest since:
2022
67th Wettest
Wettest since:
1983
Jun 1900–May 1903
36-Month
53.18"
(1,350.77mm)
52.30"
(1,328.42mm)
0.88"
(22.35mm)
78th Driest
Driest since:
2022
48th Wettest
Wettest since:
1984
Jun 1899–May 1903
48-Month
70.18"
(1,782.57mm)
69.56"
(1,766.82mm)
0.62"
(15.75mm)
76th Driest
Driest since:
2015
49th Wettest
Wettest to Date
1998
Jun 1898–May 1903
60-Month
84.48"
(2,145.79mm)
86.83"
(2,205.48mm)
-2.35"
(-59.69mm)
63rd Driest
Driest since:
1933
61st Wettest
Wettest to Date
1999

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