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.

Southwest Climate Region

Precipitation Rankings, July 1991

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
July 1991
1-Month 		2.18"
(55.37mm)		 1.87"
(47.50mm)		 0.31"
(7.87mm)		 91st Driest
Driest since:
 2003
38th Wettest
Wettest since:
 1914
Ties: 2022
Jun–Jul 1991
2-Month 		3.20"
(81.28mm)		 2.81"
(71.37mm)		 0.39"
(9.91mm)		 98th Driest
Driest since:
 1980
31st Wettest
Wettest since:
 1921
May–Jul 1991
3-Month 		4.22"
(107.19mm)		 3.93"
(99.82mm)		 0.29"
(7.37mm)		 92nd Driest
Driest since:
 2002
37th Wettest
Wettest since:
 2015
Apr–Jul 1991
4-Month 		4.77"
(121.16mm)		 4.99"
(126.75mm)		 -0.22"
(-5.59mm)		 59th Driest
Driest since:
 2002
70th Wettest
Wettest since:
 1914
Mar–Jul 1991
5-Month 		6.67"
(169.42mm)		 6.14"
(155.96mm)		 0.53"
(13.46mm)		 99th Driest
Driest since:
 2002
30th Wettest
Wettest since:
 1941
Ties: 1979, 2019
Feb–Jul 1991
6-Month 		7.24"
(183.90mm)		 7.14"
(181.36mm)		 0.10"
(2.54mm)		 77th Driest
Driest since:
 2002
52nd Wettest
Wettest since:
 1941
Jan–Jul 1991
7-Month 		8.08"
(205.23mm)		 8.12"
(206.25mm)		 -0.04"
(-1.02mm)		 71st Driest
Driest since:
 2002
58th Wettest
Wettest since:
 1905
Dec 1990–Jul 1991
8-Month 		9.16"
(232.66mm)		 9.13"
(231.90mm)		 0.03"
(0.76mm)		 74th Driest
Driest since:
 2002
54th Wettest
Wettest since:
 1941
Nov 1990–Jul 1991
9-Month 		10.27"
(260.86mm)		 10.02"
(254.51mm)		 0.25"
(6.35mm)		 76th Driest
Driest since:
 2002
52nd Wettest
Wettest since:
 1941
Oct 1990–Jul 1991
10-Month 		11.16"
(283.46mm)		 11.15"
(283.21mm)		 0.01"
(0.25mm)		 70th Driest
Driest since:
 2002
58th Wettest
Wettest since:
 1941
Sep 1990–Jul 1991
11-Month 		13.28"
(337.31mm)		 12.52"
(318.01mm)		 0.76"
(19.30mm)		 89th Driest
Driest since:
 2002
39th Wettest
Wettest since:
 1941
Aug 1990–Jul 1991
12-Month 		15.29"
(388.37mm)		 14.53"
(369.06mm)		 0.76"
(19.31mm)		 84th Driest
Driest since:
 2002
44th Wettest
Wettest since:
 1941
Feb 1990–Jul 1991
18-Month 		22.86"
(580.64mm)		 21.67"
(550.42mm)		 1.19"
(30.22mm)		 91st Driest
Driest since:
 2002
37th Wettest
Wettest since:
 1942
Aug 1989–Jul 1991
24-Month 		28.08"
(713.23mm)		 29.06"
(738.12mm)		 -0.98"
(-24.89mm)		 57th Driest
Driest since:
 2003
70th Wettest
Wettest since:
 1942
Aug 1988–Jul 1991
36-Month 		40.57"
(1,030.48mm)		 43.55"
(1,106.17mm)		 -2.98"
(-75.69mm)		 39th Driest
Driest since:
 1956
87th Wettest
Wettest since:
 1907
Aug 1987–Jul 1991
48-Month 		55.76"
(1,416.30mm)		 58.02"
(1,473.71mm)		 -2.26"
(-57.41mm)		 47th Driest
Driest since:
 1956
78th Wettest
Wettest since:
 1986
Aug 1986–Jul 1991
60-Month 		72.64"
(1,845.06mm)		 72.50"
(1,841.50mm)		 0.14"
(3.56mm)		 68th Driest
Driest since:
 1904
56th Wettest
Wettest since:
 1987

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