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, September 1927

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
September 1927
1-Month 		2.56"
(65.02mm)		 1.36"
(34.54mm)		 1.20"
(30.48mm)		 125th Driest
Driest since:
 1953, 1956
4th Wettest
Wettest to Date
 2013
Aug–Sep 1927
2-Month 		4.93"
(125.22mm)		 3.38"
(85.85mm)		 1.55"
(39.37mm)		 124th Driest
Driest since:
 2020
5th Wettest
Wettest to Date
 2013
Jul–Sep 1927
3-Month 		7.00"
(177.80mm)		 5.25"
(133.35mm)		 1.75"
(44.45mm)		 122nd Driest
Driest since:
 2020
7th Wettest
Wettest to Date
 2013
Jun–Sep 1927
4-Month 		8.82"
(224.03mm)		 6.19"
(157.23mm)		 2.63"
(66.80mm)		 128th Driest
Driest since:
 2020
1st Wettest
Wettest to Date
 1927
May–Sep 1927
5-Month 		9.17"
(232.92mm)		 7.30"
(185.42mm)		 1.87"
(47.50mm)		 121st Driest
Driest since:
 2020
8th Wettest
Wettest since:
 1941
Apr–Sep 1927
6-Month 		9.99"
(253.75mm)		 8.36"
(212.34mm)		 1.63"
(41.41mm)		 114th Driest
Driest since:
 2020
15th Wettest
Wettest since:
 1941
Mar–Sep 1927
7-Month 		11.38"
(289.05mm)		 9.51"
(241.55mm)		 1.87"
(47.50mm)		 119th Driest
Driest since:
 1956
10th Wettest
Wettest since:
 1941
Feb–Sep 1927
8-Month 		13.25"
(336.55mm)		 10.52"
(267.21mm)		 2.73"
(69.34mm)		 126th Driest
Driest since:
 1956
3rd Wettest
Wettest since:
 1941
Jan–Sep 1927
9-Month 		13.77"
(349.76mm)		 11.50"
(292.10mm)		 2.27"
(57.66mm)		 121st Driest
Driest since:
 1956
8th Wettest
Wettest since:
 1941
Dec 1926–Sep 1927
10-Month 		15.55"
(394.97mm)		 12.51"
(317.75mm)		 3.04"
(77.22mm)		 124th Driest
Driest since:
 1956
4th Wettest
Wettest since:
 1941
Nov 1926–Sep 1927
11-Month 		16.17"
(410.72mm)		 13.40"
(340.36mm)		 2.77"
(70.36mm)		 117th Driest
Driest since:
 1956
11th Wettest
Wettest since:
 1941
Ties: 1993
Oct 1926–Sep 1927
12-Month 		17.04"
(432.82mm)		 14.53"
(369.06mm)		 2.51"
(63.76mm)		 109th Driest
Driest since:
 1956
19th Wettest
Wettest since:
 1941
Apr 1926–Sep 1927
18-Month 		26.39"
(670.31mm)		 22.92"
(582.17mm)		 3.47"
(88.14mm)		 116th Driest
Driest since:
 2021
12th Wettest
Wettest since:
 1941
Ties: 1986
Oct 1925–Sep 1927
24-Month 		32.43"
(823.72mm)		 29.08"
(738.63mm)		 3.35"
(85.09mm)		 110th Driest
Driest since:
 1956
17th Wettest
Wettest since:
 1942
Oct 1924–Sep 1927
36-Month 		46.14"
(1,171.96mm)		 43.57"
(1,106.68mm)		 2.57"
(65.28mm)		 99th Driest
Driest since:
 1956
27th Wettest
Wettest since:
 1907
Oct 1923–Sep 1927
48-Month 		58.80"
(1,493.52mm)		 58.05"
(1,474.47mm)		 0.75"
(19.05mm)		 78th Driest
Driest since:
 1956
47th Wettest
Wettest since:
 1986
Oct 1922–Sep 1927
60-Month 		74.23"
(1,885.44mm)		 72.53"
(1,842.26mm)		 1.70"
(43.18mm)		 83rd Driest
Driest since:
 1957
41st Wettest
Wettest since:
 1986

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