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 2006

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
May 2006
1-Month 		0.65"
(16.51mm)		 0.92"
(23.37mm)		 -0.27"
(-6.86mm)		 51st Driest
Driest since:
 1924
78th Wettest
Wettest since:
 1998
Ties: 2013
Apr–May 2006
2-Month 		3.82"
(97.03mm)		 2.26"
(57.40mm)		 1.56"
(39.63mm)		 114th Driest
Driest since:
 1909
15th Wettest
Wettest since:
 1896
Mar–May 2006
3-Month 		7.72"
(196.09mm)		 4.59"
(116.59mm)		 3.13"
(79.50mm)		 120th Driest
Driest since:
 2008
9th Wettest
Wettest since:
 1995
Feb–May 2006
4-Month 		9.63"
(244.60mm)		 7.31"
(185.67mm)		 2.32"
(58.93mm)		 109th Driest
Driest since:
 1997
20th Wettest
Wettest since:
 1998
Jan–May 2006
5-Month 		12.90"
(327.66mm)		 10.29"
(261.37mm)		 2.61"
(66.29mm)		 103rd Driest
Driest since:
 2022
26th Wettest
Wettest since:
 1998
Dec 2005–May 2006
6-Month 		18.25"
(463.55mm)		 12.84"
(326.14mm)		 5.41"
(137.41mm)		 115th Driest
Driest since:
 1924
13th Wettest
Wettest since:
 1995
Nov 2005–May 2006
7-Month 		19.88"
(504.95mm)		 14.71"
(373.63mm)		 5.17"
(131.32mm)		 113th Driest
Driest since:
 1977
15th Wettest
Wettest since:
 1995
Oct 2005–May 2006
8-Month 		20.83"
(529.08mm)		 15.74"
(399.80mm)		 5.09"
(129.28mm)		 111th Driest
Driest since:
 1977
17th Wettest
Wettest since:
 1983
Sep 2005–May 2006
9-Month 		21.17"
(537.72mm)		 16.23"
(412.24mm)		 4.94"
(125.48mm)		 112th Driest
Driest since:
 2021
16th Wettest
Wettest since:
 1983
Aug 2005–May 2006
10-Month 		21.58"
(548.13mm)		 16.62"
(422.15mm)		 4.96"
(125.98mm)		 112th Driest
Driest since:
 2021
16th Wettest
Wettest since:
 1983
Jul 2005–May 2006
11-Month 		21.81"
(553.97mm)		 16.95"
(430.53mm)		 4.86"
(123.44mm)		 110th Driest
Driest since:
 2021
18th Wettest
Wettest since:
 1983
Jun 2005–May 2006
12-Month 		22.41"
(569.21mm)		 17.44"
(442.98mm)		 4.97"
(126.23mm)		 112th Driest
Driest since:
 2021
16th Wettest
Wettest since:
 1983
Dec 2004–May 2006
18-Month 		39.95"
(1,014.73mm)		 30.25"
(768.35mm)		 9.70"
(246.38mm)		 117th Driest
Driest since:
 1977
10th Wettest
Wettest since:
 1983
Jun 2004–May 2006
24-Month 		45.85"
(1,164.59mm)		 34.89"
(886.21mm)		 10.96"
(278.38mm)		 120th Driest
Driest since:
 2022
7th Wettest
Wettest since:
 1983
Jun 2003–May 2006
36-Month 		61.08"
(1,551.43mm)		 52.30"
(1,328.42mm)		 8.78"
(223.01mm)		 112th Driest
Driest since:
 2022
14th Wettest
Wettest since:
 1984
Jun 2002–May 2006
48-Month 		78.57"
(1,995.68mm)		 69.56"
(1,766.82mm)		 9.01"
(228.86mm)		 105th Driest
Driest since:
 2015
20th Wettest
Wettest since:
 1998
Jun 2001–May 2006
60-Month 		92.21"
(2,342.13mm)		 86.83"
(2,205.48mm)		 5.38"
(136.65mm)		 92nd Driest
Driest since:
 1933
32nd Wettest
Wettest since:
 1999

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