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 2005

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
May 2005
1-Month		2.31"
(58.67mm)		0.92"
(23.37mm)		1.39"
(35.30mm)		125th Driest
Driest since:
1924
4th Wettest
Wettest since:
1998
Apr–May 2005
2-Month		3.91"
(99.31mm)		2.26"
(57.40mm)		1.65"
(41.91mm)		118th Driest
Driest since:
1909
11th Wettest
Wettest since:
1896
Mar–May 2005
3-Month		6.60"
(167.64mm)		4.59"
(116.59mm)		2.01"
(51.05mm)		110th Driest
Driest since:
2008
19th Wettest
Wettest since:
1995
Feb–May 2005
4-Month		9.56"
(242.82mm)		7.31"
(185.67mm)		2.25"
(57.15mm)		108th Driest
Driest since:
1997
21st Wettest
Wettest since:
1998
Jan–May 2005
5-Month		13.76"
(349.50mm)		10.29"
(261.37mm)		3.47"
(88.13mm)		108th Driest
Driest since:
2022
21st Wettest
Wettest since:
1998
Dec 2004–May 2005
6-Month		17.54"
(445.52mm)		12.84"
(326.14mm)		4.70"
(119.38mm)		112th Driest
Driest since:
1924
16th Wettest
Wettest since:
1995
Nov 2004–May 2005
7-Month		19.11"
(485.39mm)		14.71"
(373.63mm)		4.40"
(111.76mm)		109th Driest
Driest since:
1977
19th Wettest
Wettest since:
1995
Oct 2004–May 2005
8-Month		22.27"
(565.66mm)		15.74"
(399.80mm)		6.53"
(165.86mm)		119th Driest
Driest since:
1977
9th Wettest
Wettest since:
1983
Sep 2004–May 2005
9-Month		22.54"
(572.52mm)		16.23"
(412.24mm)		6.31"
(160.28mm)		118th Driest
Driest since:
2021
10th Wettest
Wettest since:
1983
Aug 2004–May 2005
10-Month		22.99"
(583.95mm)		16.62"
(422.15mm)		6.37"
(161.80mm)		118th Driest
Driest since:
2021
10th Wettest
Wettest since:
1983
Jul 2004–May 2005
11-Month		23.25"
(590.55mm)		16.95"
(430.53mm)		6.30"
(160.02mm)		117th Driest
Driest since:
2021
11th Wettest
Wettest since:
1983
Jun 2004–May 2005
12-Month		23.44"
(595.38mm)		17.44"
(442.98mm)		6.00"
(152.40mm)		116th Driest
Driest since:
2021
12th Wettest
Wettest since:
1983
Dec 2003–May 2005
18-Month		35.34"
(897.64mm)		30.25"
(768.35mm)		5.09"
(129.29mm)		106th Driest
Driest since:
1977
21st Wettest
Wettest since:
1983
Jun 2003–May 2005
24-Month		38.67"
(982.22mm)		34.89"
(886.21mm)		3.78"
(96.01mm)		99th Driest
Driest since:
2022
28th Wettest
Wettest since:
1983
Jun 2002–May 2005
36-Month		56.16"
(1,426.46mm)		52.30"
(1,328.42mm)		3.86"
(98.04mm)		90th Driest
Driest since:
2022
36th Wettest
Wettest since:
1984
Jun 2001–May 2005
48-Month		69.80"
(1,772.92mm)		69.56"
(1,766.82mm)		0.24"
(6.10mm)		71st Driest
Driest since:
2015
54th Wettest
Wettest since:
1998
Jun 2000–May 2005
60-Month		83.22"
(2,113.79mm)		86.83"
(2,205.48mm)		-3.61"
(-91.69mm)		57th Driest
Driest since:
1933
67th Wettest
Wettest since:
1999

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