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, August 2020

View Period (Months):
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  • Record Wettest
PeriodValue1901-2000
Mean
AnomalyRank
(1895-2022)
Wettest/Driest
Since
Record
August 2020
1-Month
0.59"
(14.99mm)
2.02"
(51.31mm)
-1.43"
(-36.32mm)
2nd Driest
Driest since:
1962
127th Wettest
Wettest since:
1963
Jul–Aug 2020
2-Month
1.95"
(49.53mm)
3.89"
(98.81mm)
-1.94"
(-49.28mm)
1st Driest
Driest to Date
2020
128th Wettest
Wettest since:
1921
Jun–Aug 2020
3-Month
2.56"
(65.02mm)
4.83"
(122.68mm)
-2.27"
(-57.66mm)
1st Driest
Driest to Date
2020
128th Wettest
Wettest since:
1921
May–Aug 2020
4-Month
2.97"
(75.44mm)
5.94"
(150.88mm)
-2.97"
(-75.44mm)
1st Driest
Driest to Date
2020
128th Wettest
Wettest since:
1921
Apr–Aug 2020
5-Month
3.43"
(87.12mm)
7.00"
(177.80mm)
-3.57"
(-90.68mm)
1st Driest
Driest to Date
2020
128th Wettest
Wettest since:
1999
Mar–Aug 2020
6-Month
5.05"
(128.27mm)
8.15"
(207.01mm)
-3.10"
(-78.74mm)
3rd Driest
Driest since:
2002
126th Wettest
Wettest since:
1941
Feb–Aug 2020
7-Month
5.99"
(152.15mm)
9.16"
(232.66mm)
-3.17"
(-80.51mm)
3rd Driest
Driest since:
2002
126th Wettest
Wettest since:
1941
Jan–Aug 2020
8-Month
6.59"
(167.39mm)
10.14"
(257.56mm)
-3.55"
(-90.17mm)
2nd Driest
Driest since:
2002
127th Wettest
Wettest since:
1941
Dec 2019–Aug 2020
9-Month
7.84"
(199.14mm)
11.15"
(283.21mm)
-3.31"
(-84.07mm)
3rd Driest
Driest since:
2002
125th Wettest
Wettest since:
1941
Nov 2019–Aug 2020
10-Month
9.79"
(248.67mm)
12.04"
(305.82mm)
-2.25"
(-57.15mm)
17th Driest
Driest since:
2002
111th Wettest
Wettest since:
1941
Oct 2019–Aug 2020
11-Month
10.43"
(264.92mm)
13.17"
(334.52mm)
-2.74"
(-69.60mm)
13th Driest
Driest since:
2002
115th Wettest
Wettest since:
1941
Ties: 1989
Sep 2019–Aug 2020
12-Month
11.66"
(296.16mm)
14.54"
(369.32mm)
-2.88"
(-73.16mm)
13th Driest
Driest since:
2002
115th Wettest
Wettest since:
1941
Mar 2019–Aug 2020
18-Month
19.44"
(493.78mm)
22.69"
(576.33mm)
-3.25"
(-82.55mm)
21st Driest
Driest since:
2002
107th Wettest
Wettest since:
1942
Sep 2018–Aug 2020
24-Month
27.31"
(693.67mm)
29.09"
(738.89mm)
-1.78"
(-45.22mm)
47th Driest
Driest since:
2003
80th Wettest
Wettest since:
1942
Sep 2017–Aug 2020
36-Month
37.89"
(962.41mm)
43.58"
(1,106.93mm)
-5.69"
(-144.52mm)
14th Driest
Driest since:
1956
112th Wettest
Wettest since:
1907
Ties: 1935
Sep 2016–Aug 2020
48-Month
53.89"
(1,368.81mm)
58.05"
(1,474.47mm)
-4.16"
(-105.66mm)
32nd Driest
Driest since:
1956
93rd Wettest
Wettest since:
1986
Sep 2015–Aug 2020
60-Month
68.50"
(1,739.90mm)
72.53"
(1,842.26mm)
-4.03"
(-102.36mm)
41st Driest
Driest since:
2004
83rd Wettest
Wettest since:
1987

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