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 2003

View Period (Months):
Download: CSV JSON XML
  • Record Driest
  • Bottom ⅒
  • Bottom ⅓
  • Normal
  • Top ⅓
  • Top ⅒
  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
May 2003
1-Month		1.01"
(25.65mm)		0.92"
(23.37mm)		0.09"
(2.28mm)		85th Driest
Driest since:
1924
44th Wettest
Wettest since:
1998
Ties: 1948
Apr–May 2003
2-Month		4.04"
(102.62mm)		2.26"
(57.40mm)		1.78"
(45.22mm)		121st Driest
Driest since:
1909
8th Wettest
Wettest since:
1896
Mar–May 2003
3-Month		5.99"
(152.15mm)		4.59"
(116.59mm)		1.40"
(35.56mm)		102nd Driest
Driest since:
2008
27th Wettest
Wettest since:
1995
Feb–May 2003
4-Month		7.99"
(202.95mm)		7.31"
(185.67mm)		0.68"
(17.28mm)		89th Driest
Driest since:
1997
40th Wettest
Wettest since:
1998
Jan–May 2003
5-Month		9.34"
(237.24mm)		10.29"
(261.37mm)		-0.95"
(-24.13mm)		62nd Driest
Driest since:
2022
67th Wettest
Wettest since:
1998
Dec 2002–May 2003
6-Month		14.46"
(367.28mm)		12.84"
(326.14mm)		1.62"
(41.14mm)		91st Driest
Driest since:
1924
37th Wettest
Wettest since:
1995
Nov 2002–May 2003
7-Month		16.72"
(424.69mm)		14.71"
(373.63mm)		2.01"
(51.06mm)		91st Driest
Driest since:
1977
37th Wettest
Wettest since:
1995
Oct 2002–May 2003
8-Month		16.90"
(429.26mm)		15.74"
(399.80mm)		1.16"
(29.46mm)		84th Driest
Driest since:
1977
44th Wettest
Wettest since:
1983
Sep 2002–May 2003
9-Month		17.15"
(435.61mm)		16.23"
(412.24mm)		0.92"
(23.37mm)		82nd Driest
Driest since:
2021
46th Wettest
Wettest since:
1983
Aug 2002–May 2003
10-Month		17.18"
(436.37mm)		16.62"
(422.15mm)		0.56"
(14.22mm)		78th Driest
Driest since:
2021
50th Wettest
Wettest since:
1983
Jul 2002–May 2003
11-Month		17.34"
(440.44mm)		16.95"
(430.53mm)		0.39"
(9.91mm)		76th Driest
Driest since:
2021
52nd Wettest
Wettest since:
1983
Jun 2002–May 2003
12-Month		17.49"
(444.25mm)		17.44"
(442.98mm)		0.05"
(1.27mm)		73rd Driest
Driest since:
2021
55th Wettest
Wettest since:
1983
Dec 2001–May 2003
18-Month		26.54"
(674.12mm)		30.25"
(768.35mm)		-3.71"
(-94.23mm)		40th Driest
Driest since:
1977
87th Wettest
Wettest since:
1983
Jun 2001–May 2003
24-Month		31.13"
(790.70mm)		34.89"
(886.21mm)		-3.76"
(-95.51mm)		38th Driest
Driest since:
2022
89th Wettest
Wettest since:
1983
Jun 2000–May 2003
36-Month		44.55"
(1,131.57mm)		52.30"
(1,328.42mm)		-7.75"
(-196.85mm)		26th Driest
Driest since:
2022
100th Wettest
Wettest since:
1984
Jun 1999–May 2003
48-Month		60.86"
(1,545.84mm)		69.56"
(1,766.82mm)		-8.70"
(-220.98mm)		25th Driest
Driest since:
2015
100th Wettest
Wettest since:
1998
Jun 1998–May 2003
60-Month		78.57"
(1,995.68mm)		86.83"
(2,205.48mm)		-8.26"
(-209.80mm)		31st Driest
Driest since:
1933
93rd Wettest
Wettest since:
1999

Citing This Page