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, April 2010

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2023)		Wettest/Driest
Since		Record
April 2010
1-Month		2.57"
(65.28mm)		1.33"
(33.78mm)		1.24"
(31.50mm)		117th Driest
Driest since:
1909
13th Wettest
Wettest since:
1935
Mar–Apr 2010
2-Month		4.25"
(107.95mm)		3.67"
(93.22mm)		0.58"
(14.73mm)		88th Driest
Driest since:
2008
42nd Wettest
Wettest since:
1983
Feb–Apr 2010
3-Month		6.82"
(173.23mm)		6.39"
(162.31mm)		0.43"
(10.92mm)		81st Driest
Driest since:
1997
49th Wettest
Wettest since:
1983
Ties: 1920, 1948
Jan–Apr 2010
4-Month		11.22"
(284.99mm)		9.37"
(238.00mm)		1.85"
(46.99mm)		97th Driest
Driest since:
2022
33rd Wettest
Wettest since:
1995
Dec 2009–Apr 2010
5-Month		13.57"
(344.68mm)		11.92"
(302.77mm)		1.65"
(41.91mm)		92nd Driest
Driest since:
1977
37th Wettest
Wettest since:
1978
Nov 2009–Apr 2010
6-Month		14.23"
(361.44mm)		13.79"
(350.27mm)		0.44"
(11.17mm)		79th Driest
Driest since:
1977
50th Wettest
Wettest since:
1983
Oct 2009–Apr 2010
7-Month		15.77"
(400.56mm)		14.82"
(376.43mm)		0.95"
(24.13mm)		83rd Driest
Driest since:
1977
46th Wettest
Wettest since:
1983
Sep 2009–Apr 2010
8-Month		15.88"
(403.35mm)		15.31"
(388.87mm)		0.57"
(14.48mm)		77th Driest
Driest since:
1977
52nd Wettest
Wettest since:
1983
Aug 2009–Apr 2010
9-Month		16.09"
(408.69mm)		15.70"
(398.78mm)		0.39"
(9.91mm)		76th Driest
Driest since:
1977
53rd Wettest
Wettest since:
1983
Jul 2009–Apr 2010
10-Month		16.28"
(413.51mm)		16.03"
(407.16mm)		0.25"
(6.35mm)		75th Driest
Driest since:
2021
54th Wettest
Wettest since:
1983
Jun 2009–Apr 2010
11-Month		17.39"
(441.71mm)		16.52"
(419.61mm)		0.87"
(22.10mm)		81st Driest
Driest since:
2021
48th Wettest
Wettest since:
1983
May 2009–Apr 2010
12-Month		18.37"
(466.60mm)		17.44"
(442.98mm)		0.93"
(23.62mm)		82nd Driest
Driest since:
1977
47th Wettest
Wettest since:
1983
Nov 2008–Apr 2010
18-Month		29.18"
(741.17mm)		31.22"
(792.99mm)		-2.04"
(-51.82mm)		49th Driest
Driest since:
1977
79th Wettest
Wettest since:
1983
May 2008–Apr 2010
24-Month		31.03"
(788.16mm)		34.90"
(886.46mm)		-3.87"
(-98.30mm)		38th Driest
Driest since:
1977
90th Wettest
Wettest since:
1983
May 2007–Apr 2010
36-Month		44.66"
(1,134.36mm)		52.30"
(1,328.42mm)		-7.64"
(-194.06mm)		30th Driest
Driest since:
2022
97th Wettest
Wettest since:
1984
May 2006–Apr 2010
48-Month		55.60"
(1,412.24mm)		69.56"
(1,766.82mm)		-13.96"
(-354.58mm)		6th Driest
Driest since:
2015
120th Wettest
Wettest since:
1998
May 2005–Apr 2010
60-Month		79.67"
(2,023.62mm)		86.83"
(2,205.48mm)		-7.16"
(-181.86mm)		39th Driest
Driest since:
1933
86th Wettest
Wettest since:
1999

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