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.

Colorado

Precipitation Rankings, May 1939

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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
May 1939
1-Month 		1.02"
(25.91mm)		 2.02"
(51.31mm)		 -1.00"
(-25.40mm)		 16th Driest
Driest since:
 1974
113th Wettest
Wettest since:
 2015
Apr–May 1939
2-Month 		2.00"
(50.80mm)		 3.86"
(98.04mm)		 -1.86"
(-47.24mm)		 7th Driest
Driest since:
 2002
122nd Wettest
Wettest since:
 1957
Mar–May 1939
3-Month 		3.41"
(86.61mm)		 5.37"
(136.40mm)		 -1.96"
(-49.79mm)		 13th Driest
Driest since:
 2002
116th Wettest
Wettest since:
 1957
Feb–May 1939
4-Month 		4.75"
(120.65mm)		 6.46"
(164.08mm)		 -1.71"
(-43.43mm)		 18th Driest
Driest since:
 2002
111th Wettest
Wettest since:
 1905
Jan–May 1939
5-Month 		6.41"
(162.81mm)		 7.52"
(191.01mm)		 -1.11"
(-28.20mm)		 30th Driest
Driest since:
 2002
99th Wettest
Wettest since:
 1957
Ties: 1956
Dec 1938–May 1939
6-Month 		7.60"
(193.04mm)		 8.60"
(218.44mm)		 -1.00"
(-25.40mm)		 39th Driest
Driest since:
 2002
89th Wettest
Wettest since:
 1957
Nov 1938–May 1939
7-Month 		8.62"
(218.95mm)		 9.66"
(245.36mm)		 -1.04"
(-26.41mm)		 36th Driest
Driest since:
 2002
92nd Wettest
Wettest since:
 1957
Oct 1938–May 1939
8-Month 		9.75"
(247.65mm)		 11.00"
(279.40mm)		 -1.25"
(-31.75mm)		 43rd Driest
Driest since:
 2002
85th Wettest
Wettest since:
 1995
Sep 1938–May 1939
9-Month 		12.74"
(323.60mm)		 12.43"
(315.72mm)		 0.31"
(7.88mm)		 73rd Driest
Driest since:
 2002
55th Wettest
Wettest since:
 1942
Aug 1938–May 1939
10-Month 		14.35"
(364.49mm)		 14.44"
(366.78mm)		 -0.09"
(-2.29mm)		 62nd Driest
Driest since:
 2002
66th Wettest
Wettest since:
 1942
Jul 1938–May 1939
11-Month 		16.04"
(407.42mm)		 16.54"
(420.12mm)		 -0.50"
(-12.70mm)		 57th Driest
Driest since:
 2002
71st Wettest
Wettest since:
 1942
Ties: 1949, 1969
Jun 1938–May 1939
12-Month 		17.79"
(451.87mm)		 18.08"
(459.23mm)		 -0.29"
(-7.36mm)		 59th Driest
Driest since:
 2002
69th Wettest
Wettest since:
 1942
Dec 1937–May 1939
18-Month 		29.02"
(737.11mm)		 26.70"
(678.18mm)		 2.32"
(58.93mm)		 100th Driest
Driest since:
 2013
27th Wettest
Wettest since:
 1942
Jun 1937–May 1939
24-Month 		37.39"
(949.71mm)		 36.18"
(918.97mm)		 1.21"
(30.74mm)		 82nd Driest
Driest since:
 1902
45th Wettest
Wettest since:
 1942
Jun 1936–May 1939
36-Month 		54.52"
(1,384.81mm)		 54.21"
(1,376.93mm)		 0.31"
(7.88mm)		 69th Driest
Driest since:
 2022
57th Wettest
Wettest since:
 1943
Jun 1935–May 1939
48-Month 		69.15"
(1,756.41mm)		 72.23"
(1,834.64mm)		 -3.08"
(-78.23mm)		 36th Driest
Driest since:
 1956
89th Wettest
Wettest since:
 1944
Jun 1934–May 1939
60-Month 		85.53"
(2,172.46mm)		 90.24"
(2,292.10mm)		 -4.71"
(-119.64mm)		 33rd Driest
Driest since:
 2022
91st Wettest
Wettest since:
 1987

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