Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. 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 2021

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
July 2021
1-Month
2.74"
(69.60mm)
1.87"
(47.50mm)
0.87"
(22.10mm)
121st Driest
Driest since:
2003
8th Wettest
Wettest since:
1914
Jun–Jul 2021
2-Month
3.63"
(92.20mm)
2.81"
(71.37mm)
0.82"
(20.83mm)
115th Driest
Driest since:
1980
14th Wettest
Wettest since:
1921
Ties: 1969
May–Jul 2021
3-Month
4.75"
(120.65mm)
3.93"
(99.82mm)
0.82"
(20.83mm)
110th Driest
Driest since:
2002
19th Wettest
Wettest since:
2015
Apr–Jul 2021
4-Month
5.30"
(134.62mm)
4.99"
(126.75mm)
0.31"
(7.87mm)
92nd Driest
Driest since:
2002
37th Wettest
Wettest since:
1914
Ties: 1929, 2004, 2017
Mar–Jul 2021
5-Month
6.39"
(162.31mm)
6.14"
(155.96mm)
0.25"
(6.35mm)
88th Driest
Driest since:
2002
41st Wettest
Wettest since:
1941
Ties: 1920
Feb–Jul 2021
6-Month
7.03"
(178.56mm)
7.14"
(181.36mm)
-0.11"
(-2.80mm)
63rd Driest
Driest since:
2002
66th Wettest
Wettest since:
1941
Jan–Jul 2021
7-Month
7.85"
(199.39mm)
8.12"
(206.25mm)
-0.27"
(-6.86mm)
63rd Driest
Driest since:
2002
66th Wettest
Wettest since:
1905
Dec 2020–Jul 2021
8-Month
8.41"
(213.61mm)
9.13"
(231.90mm)
-0.72"
(-18.29mm)
51st Driest
Driest since:
2002
77th Wettest
Wettest since:
1941
Nov 2020–Jul 2021
9-Month
8.91"
(226.31mm)
10.02"
(254.51mm)
-1.11"
(-28.20mm)
43rd Driest
Driest since:
2002
85th Wettest
Wettest since:
1941
Ties: 2011
Oct 2020–Jul 2021
10-Month
9.31"
(236.47mm)
11.15"
(283.21mm)
-1.84"
(-46.74mm)
31st Driest
Driest since:
2002
97th Wettest
Wettest since:
1941
Sep 2020–Jul 2021
11-Month
9.86"
(250.44mm)
12.52"
(318.01mm)
-2.66"
(-67.57mm)
16th Driest
Driest since:
2002
112th Wettest
Wettest since:
1941
Aug 2020–Jul 2021
12-Month
10.45"
(265.43mm)
14.53"
(369.06mm)
-4.08"
(-103.63mm)
5th Driest
Driest since:
2002
123rd Wettest
Wettest since:
1941
Feb 2020–Jul 2021
18-Month
15.85"
(402.59mm)
21.67"
(550.42mm)
-5.82"
(-147.83mm)
2nd Driest
Driest since:
2002
126th Wettest
Wettest since:
1942
Aug 2019–Jul 2021
24-Month
22.63"
(574.80mm)
29.06"
(738.12mm)
-6.43"
(-163.32mm)
3rd Driest
Driest since:
2003
124th Wettest
Wettest since:
1942
Aug 2018–Jul 2021
36-Month
38.82"
(986.03mm)
43.55"
(1,106.17mm)
-4.73"
(-120.14mm)
25th Driest
Driest since:
1956
101st Wettest
Wettest since:
1907
Aug 2017–Jul 2021
48-Month
49.63"
(1,260.60mm)
58.02"
(1,473.71mm)
-8.39"
(-213.11mm)
10th Driest
Driest since:
1956
115th Wettest
Wettest since:
1986
Aug 2016–Jul 2021
60-Month
66.06"
(1,677.92mm)
72.50"
(1,841.50mm)
-6.44"
(-163.58mm)
19th Driest
Driest since:
1904
105th Wettest
Wettest since:
1987

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