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 1940

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
September 1940
1-Month
2.43"
(61.72mm)
1.24"
(31.50mm)
1.19"
(30.22mm)
121st Driest
Driest since:
1979
8th Wettest
Wettest since:
1923
Aug–Sep 1940
2-Month
2.91"
(73.91mm)
2.31"
(58.67mm)
0.60"
(15.24mm)
102nd Driest
Driest since:
2012
27th Wettest
Wettest since:
1923
Jul–Sep 1940
3-Month
3.97"
(100.84mm)
3.59"
(91.19mm)
0.38"
(9.65mm)
89th Driest
Driest since:
1964
40th Wettest
Wettest since:
1923
Jun–Sep 1940
4-Month
5.33"
(135.38mm)
5.43"
(137.92mm)
-0.10"
(-2.54mm)
69th Driest
Driest since:
2012
60th Wettest
Wettest since:
1923
Ties: 1958
May–Sep 1940
5-Month
6.17"
(156.72mm)
7.64"
(194.06mm)
-1.47"
(-37.34mm)
28th Driest
Driest since:
1919
101st Wettest
Wettest since:
1915
Apr–Sep 1940
6-Month
9.22"
(234.19mm)
9.42"
(239.27mm)
-0.20"
(-5.08mm)
63rd Driest
Driest since:
2012
66th Wettest
Wettest since:
1941
Mar–Sep 1940
7-Month
10.31"
(261.87mm)
10.67"
(271.02mm)
-0.36"
(-9.15mm)
57th Driest
Driest since:
2012
72nd Wettest
Wettest since:
1941
Ties: 1972
Feb–Sep 1940
8-Month
11.54"
(293.12mm)
11.63"
(295.40mm)
-0.09"
(-2.28mm)
67th Driest
Driest since:
2012
62nd Wettest
Wettest since:
1945
Jan–Sep 1940
9-Month
13.15"
(334.01mm)
12.70"
(322.58mm)
0.45"
(11.43mm)
77th Driest
Driest since:
1919
52nd Wettest
Wettest since:
1915, 1945
Dec 1939–Sep 1940
10-Month
13.66"
(346.96mm)
13.71"
(348.23mm)
-0.05"
(-1.27mm)
66th Driest
Driest since:
1919
62nd Wettest
Wettest since:
1923
Nov 1939–Sep 1940
11-Month
13.68"
(347.47mm)
14.74"
(374.40mm)
-1.06"
(-26.93mm)
43rd Driest
Driest since:
1919
85th Wettest
Wettest since:
1923
Oct 1939–Sep 1940
12-Month
14.63"
(371.60mm)
15.94"
(404.88mm)
-1.31"
(-33.28mm)
38th Driest
Driest since:
1919
90th Wettest
Wettest since:
1995
Apr 1939–Sep 1940
18-Month
21.54"
(547.12mm)
25.35"
(643.89mm)
-3.81"
(-96.77mm)
20th Driest
Driest since:
2021
108th Wettest
Wettest since:
1945
Oct 1938–Sep 1940
24-Month
28.09"
(713.49mm)
31.88"
(809.75mm)
-3.79"
(-96.26mm)
22nd Driest
Driest since:
2002
105th Wettest
Wettest since:
1998
Oct 1937–Sep 1940
36-Month
45.54"
(1,156.72mm)
47.81"
(1,214.37mm)
-2.27"
(-57.65mm)
36th Driest
Driest since:
2002
90th Wettest
Wettest since:
1997
Oct 1936–Sep 1940
48-Month
62.59"
(1,589.79mm)
63.72"
(1,618.49mm)
-1.13"
(-28.70mm)
56th Driest
Driest since:
2003
69th Wettest
Wettest since:
1998
Oct 1935–Sep 1940
60-Month
77.37"
(1,965.20mm)
79.56"
(2,020.82mm)
-2.19"
(-55.62mm)
47th Driest
Driest since:
2004
77th Wettest
Wettest since:
1999

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