Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. Degree Days are not available for Great Plains, Souther Plains and Gulf Coast Rockies and Westward, River Basins, or Agricultural Belts. 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 2007

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PeriodValue1901-2000
Mean
AnomalyRank
(1895-2022)
Wettest/Driest
Since
Record
May 2007
1-Month
0.31"
(7.87mm)
0.92"
(23.37mm)
-0.61"
(-15.50mm)
10th Driest
Driest since:
1924
119th Wettest
Wettest since:
1998
Ties: 1970
Apr–May 2007
2-Month
1.43"
(36.32mm)
2.26"
(57.40mm)
-0.83"
(-21.08mm)
26th Driest
Driest since:
1909
103rd Wettest
Wettest since:
1896
Mar–May 2007
3-Month
2.11"
(53.59mm)
4.59"
(116.59mm)
-2.48"
(-63.00mm)
7th Driest
Driest since:
2008
122nd Wettest
Wettest since:
1995
Feb–May 2007
4-Month
5.02"
(127.51mm)
7.31"
(185.67mm)
-2.29"
(-58.16mm)
27th Driest
Driest since:
1997
102nd Wettest
Wettest since:
1998
Jan–May 2007
5-Month
5.63"
(143.00mm)
10.29"
(261.37mm)
-4.66"
(-118.37mm)
12th Driest
Driest since:
2022
117th Wettest
Wettest since:
1998
Ties: 1929
Dec 2006–May 2007
6-Month
7.74"
(196.60mm)
12.84"
(326.14mm)
-5.10"
(-129.54mm)
11th Driest
Driest since:
1924
117th Wettest
Wettest since:
1995
Nov 2006–May 2007
7-Month
9.22"
(234.19mm)
14.71"
(373.63mm)
-5.49"
(-139.44mm)
8th Driest
Driest since:
1977
120th Wettest
Wettest since:
1995
Oct 2006–May 2007
8-Month
9.84"
(249.94mm)
15.74"
(399.80mm)
-5.90"
(-149.86mm)
6th Driest
Driest since:
1977
122nd Wettest
Wettest since:
1983
Sep 2006–May 2007
9-Month
9.96"
(252.98mm)
16.23"
(412.24mm)
-6.27"
(-159.26mm)
4th Driest
Driest since:
2021
124th Wettest
Wettest since:
1983
Aug 2006–May 2007
10-Month
10.02"
(254.51mm)
16.62"
(422.15mm)
-6.60"
(-167.64mm)
4th Driest
Driest since:
2021
124th Wettest
Wettest since:
1983
Jul 2006–May 2007
11-Month
10.39"
(263.91mm)
16.95"
(430.53mm)
-6.56"
(-166.62mm)
4th Driest
Driest since:
2021
124th Wettest
Wettest since:
1983
Jun 2006–May 2007
12-Month
10.60"
(269.24mm)
17.44"
(442.98mm)
-6.84"
(-173.74mm)
4th Driest
Driest since:
2021
124th Wettest
Wettest since:
1983
Dec 2005–May 2007
18-Month
28.85"
(732.79mm)
30.25"
(768.35mm)
-1.40"
(-35.56mm)
57th Driest
Driest since:
1977
70th Wettest
Wettest since:
1983
Jun 2005–May 2007
24-Month
33.01"
(838.45mm)
34.89"
(886.21mm)
-1.88"
(-47.76mm)
53rd Driest
Driest since:
2022
74th Wettest
Wettest since:
1983
Jun 2004–May 2007
36-Month
56.45"
(1,433.83mm)
52.30"
(1,328.42mm)
4.15"
(105.41mm)
92nd Driest
Driest since:
2022
34th Wettest
Wettest since:
1984
Jun 2003–May 2007
48-Month
71.68"
(1,820.67mm)
69.56"
(1,766.82mm)
2.12"
(53.85mm)
80th Driest
Driest since:
2015
45th Wettest
Wettest since:
1998
Jun 2002–May 2007
60-Month
89.17"
(2,264.92mm)
86.83"
(2,205.48mm)
2.34"
(59.44mm)
81st Driest
Driest since:
1933
43rd Wettest
Wettest since:
1999

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