Statewide Rankings

Statewide Data Info
Please note, Degree Days and Palmer Indices are not available for Alaska. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Wyoming

Precipitation Rankings, September 2021

View Period (Months):
Download: csv json xml
  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
September 2021
1-Month
0.85"
(21.59mm)
1.24"
(31.50mm)
-0.39"
(-9.91mm)
42nd Driest
Driest since:
1979
87th Wettest
Wettest since:
1923
Ties: 1977, 2005
Aug–Sep 2021
2-Month
2.32"
(58.93mm)
2.31"
(58.67mm)
0.01"
(0.26mm)
73rd Driest
Driest since:
2012
56th Wettest
Wettest since:
1923
Ties: 1991
Jul–Sep 2021
3-Month
3.42"
(86.87mm)
3.59"
(91.19mm)
-0.17"
(-4.32mm)
68th Driest
Driest since:
1964
61st Wettest
Wettest since:
1923
Ties: 1957
Jun–Sep 2021
4-Month
4.24"
(107.70mm)
5.43"
(137.92mm)
-1.19"
(-30.22mm)
35th Driest
Driest since:
2012
94th Wettest
Wettest since:
1923
Ties: 2002
May–Sep 2021
5-Month
5.98"
(151.89mm)
7.64"
(194.06mm)
-1.66"
(-42.17mm)
24th Driest
Driest since:
1919
105th Wettest
Wettest since:
1915
Apr–Sep 2021
6-Month
7.19"
(182.63mm)
9.42"
(239.27mm)
-2.23"
(-56.64mm)
21st Driest
Driest since:
2012
108th Wettest
Wettest since:
1941
Mar–Sep 2021
7-Month
8.49"
(215.65mm)
10.67"
(271.02mm)
-2.18"
(-55.37mm)
23rd Driest
Driest since:
2012
106th Wettest
Wettest since:
1941
Feb–Sep 2021
8-Month
9.78"
(248.41mm)
11.63"
(295.40mm)
-1.85"
(-46.99mm)
27th Driest
Driest since:
2012
102nd Wettest
Wettest since:
1945
Jan–Sep 2021
9-Month
10.46"
(265.68mm)
12.70"
(322.58mm)
-2.24"
(-56.90mm)
25th Driest
Driest since:
1919
104th Wettest
Wettest since:
1915, 1945
Dec 2020–Sep 2021
10-Month
11.17"
(283.72mm)
13.71"
(348.23mm)
-2.54"
(-64.51mm)
21st Driest
Driest since:
1919
107th Wettest
Wettest since:
1923
Nov 2020–Sep 2021
11-Month
11.86"
(301.24mm)
14.74"
(374.40mm)
-2.88"
(-73.16mm)
16th Driest
Driest since:
1919
112th Wettest
Wettest since:
1923
Oct 2020–Sep 2021
12-Month
12.87"
(326.90mm)
15.94"
(404.88mm)
-3.07"
(-77.98mm)
18th Driest
Driest since:
1919
110th Wettest
Wettest since:
1995
Apr 2020–Sep 2021
18-Month
18.92"
(480.57mm)
25.35"
(643.89mm)
-6.43"
(-163.32mm)
1st Driest
Driest since:
2021
127th Wettest
Wettest since:
1945
Oct 2019–Sep 2021
24-Month
25.26"
(641.60mm)
31.88"
(809.75mm)
-6.62"
(-168.15mm)
5th Driest
Driest since:
2002
122nd Wettest
Wettest since:
1998
Oct 2018–Sep 2021
36-Month
43.87"
(1,114.30mm)
47.81"
(1,214.37mm)
-3.94"
(-100.07mm)
26th Driest
Driest since:
2002
100th Wettest
Wettest since:
1997
Oct 2017–Sep 2021
48-Month
59.93"
(1,522.22mm)
63.72"
(1,618.49mm)
-3.79"
(-96.27mm)
33rd Driest
Driest since:
2003
92nd Wettest
Wettest since:
1998
Oct 2016–Sep 2021
60-Month
79.77"
(2,026.16mm)
79.56"
(2,020.82mm)
0.21"
(5.34mm)
67th Driest
Driest since:
2004
57th Wettest
Wettest since:
1999

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