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, May 1907

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
May 1907
1-Month 		1.59"
(40.39mm)		 1.11"
(28.19mm)		 0.48"
(12.20mm)		 110th Driest
Driest since:
 1974
19th Wettest
Wettest since:
 2015
Apr–May 1907
2-Month 		2.85"
(72.39mm)		 2.17"
(55.12mm)		 0.68"
(17.27mm)		 111th Driest
Driest since:
 2002
18th Wettest
Wettest since:
 1941
Mar–May 1907
3-Month 		3.71"
(94.23mm)		 3.33"
(84.58mm)		 0.38"
(9.65mm)		 95th Driest
Driest since:
 2002
34th Wettest
Wettest since:
 1941
Ties: 1898
Feb–May 1907
4-Month 		4.54"
(115.32mm)		 4.33"
(109.98mm)		 0.21"
(5.34mm)		 84th Driest
Driest since:
 2002
45th Wettest
Wettest since:
 1905
Ties: 2004
Jan–May 1907
5-Month 		6.23"
(158.24mm)		 5.31"
(134.87mm)		 0.92"
(23.37mm)		 103rd Driest
Driest since:
 1972
26th Wettest
Wettest since:
 1905
Dec 1906–May 1907
6-Month 		8.34"
(211.84mm)		 6.32"
(160.53mm)		 2.02"
(51.31mm)		 115th Driest
Driest since:
 2002
13th Wettest
Wettest since:
 1905
Nov 1906–May 1907
7-Month 		10.02"
(254.51mm)		 7.21"
(183.13mm)		 2.81"
(71.38mm)		 118th Driest
Driest since:
 2002
10th Wettest
Wettest since:
 1941
Ties: 1915
Oct 1906–May 1907
8-Month 		10.87"
(276.10mm)		 8.34"
(211.84mm)		 2.53"
(64.26mm)		 115th Driest
Driest since:
 2002
13th Wettest
Wettest since:
 1941
Sep 1906–May 1907
9-Month 		12.44"
(315.98mm)		 9.71"
(246.63mm)		 2.73"
(69.35mm)		 113th Driest
Driest since:
 2002
15th Wettest
Wettest since:
 1941
Aug 1906–May 1907
10-Month 		14.78"
(375.41mm)		 11.72"
(297.69mm)		 3.06"
(77.72mm)		 116th Driest
Driest since:
 2002
12th Wettest
Wettest since:
 1941
Jul 1906–May 1907
11-Month 		17.10"
(434.34mm)		 13.59"
(345.19mm)		 3.51"
(89.15mm)		 118th Driest
Driest since:
 2021
10th Wettest
Wettest since:
 1941
Jun 1906–May 1907
12-Month 		17.51"
(444.75mm)		 14.53"
(369.06mm)		 2.98"
(75.69mm)		 115th Driest
Driest since:
 2021
13th Wettest
Wettest since:
 1905
Dec 1905–May 1907
18-Month 		25.56"
(649.22mm)		 20.86"
(529.84mm)		 4.70"
(119.38mm)		 120th Driest
Driest since:
 2021
7th Wettest
Wettest since:
 1942
Jun 1905–May 1907
24-Month 		34.15"
(867.41mm)		 29.05"
(737.87mm)		 5.10"
(129.54mm)		 119th Driest
Driest since:
 2021
8th Wettest
Wettest since:
 1942
Jun 1904–May 1907
36-Month 		54.28"
(1,378.71mm)		 43.54"
(1,105.92mm)		 10.74"
(272.79mm)		 125th Driest
Driest since:
 2022
1st Wettest
Wettest to Date
 1907
Jun 1903–May 1907
48-Month 		64.91"
(1,648.71mm)		 58.01"
(1,473.45mm)		 6.90"
(175.26mm)		 114th Driest
Driest since:
 1904
11th Wettest
Wettest to Date
 1986
Jun 1902–May 1907
60-Month 		77.78"
(1,975.61mm)		 72.48"
(1,840.99mm)		 5.30"
(134.62mm)		 105th Driest
Driest since:
 1957
19th Wettest
Wettest to Date
 1987

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