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 1991

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
May 1991
1-Month		1.63"
(41.40mm)		2.02"
(51.31mm)		-0.39"
(-9.91mm)		46th Driest
Driest since:
1974
83rd Wettest
Wettest since:
2015
Ties: 1945
Apr–May 1991
2-Month		2.90"
(73.66mm)		3.86"
(98.04mm)		-0.96"
(-24.38mm)		31st Driest
Driest since:
2002
98th Wettest
Wettest since:
1957
Mar–May 1991
3-Month		4.88"
(123.95mm)		5.37"
(136.40mm)		-0.49"
(-12.45mm)		56th Driest
Driest since:
2002
73rd Wettest
Wettest since:
1957
Feb–May 1991
4-Month		5.32"
(135.13mm)		6.46"
(164.08mm)		-1.14"
(-28.95mm)		27th Driest
Driest since:
2002
102nd Wettest
Wettest since:
1905
Jan–May 1991
5-Month		6.12"
(155.45mm)		7.52"
(191.01mm)		-1.40"
(-35.56mm)		25th Driest
Driest since:
2002
104th Wettest
Wettest since:
1957
Dec 1990–May 1991
6-Month		7.07"
(179.58mm)		8.60"
(218.44mm)		-1.53"
(-38.86mm)		21st Driest
Driest since:
2002
107th Wettest
Wettest since:
1957
Nov 1990–May 1991
7-Month		8.48"
(215.39mm)		9.66"
(245.36mm)		-1.18"
(-29.97mm)		30th Driest
Driest since:
2002
98th Wettest
Wettest since:
1957
Oct 1990–May 1991
8-Month		10.09"
(256.29mm)		11.00"
(279.40mm)		-0.91"
(-23.11mm)		50th Driest
Driest since:
2002
78th Wettest
Wettest since:
1995
Sep 1990–May 1991
9-Month		12.19"
(309.63mm)		12.43"
(315.72mm)		-0.24"
(-6.09mm)		61st Driest
Driest since:
2002
67th Wettest
Wettest since:
1942
Ties: 1994
Aug 1990–May 1991
10-Month		13.95"
(354.33mm)		14.44"
(366.78mm)		-0.49"
(-12.45mm)		56th Driest
Driest since:
2002
72nd Wettest
Wettest since:
1942
Ties: 2010
Jul 1990–May 1991
11-Month		17.20"
(436.88mm)		16.54"
(420.12mm)		0.66"
(16.76mm)		75th Driest
Driest since:
2002
53rd Wettest
Wettest since:
1942
Jun 1990–May 1991
12-Month		17.94"
(455.68mm)		18.08"
(459.23mm)		-0.14"
(-3.55mm)		61st Driest
Driest since:
2002
67th Wettest
Wettest since:
1942
Dec 1989–May 1991
18-Month		26.73"
(678.94mm)		26.70"
(678.18mm)		0.03"
(0.76mm)		65th Driest
Driest since:
2013
62nd Wettest
Wettest since:
1942
Jun 1989–May 1991
24-Month		35.15"
(892.81mm)		36.18"
(918.97mm)		-1.03"
(-26.16mm)		52nd Driest
Driest since:
1902
75th Wettest
Wettest since:
1942
Jun 1988–May 1991
36-Month		50.40"
(1,280.16mm)		54.21"
(1,376.93mm)		-3.81"
(-96.77mm)		31st Driest
Driest since:
2022
95th Wettest
Wettest since:
1943
Jun 1987–May 1991
48-Month		67.69"
(1,719.33mm)		72.23"
(1,834.64mm)		-4.54"
(-115.31mm)		28th Driest
Driest since:
1956
97th Wettest
Wettest since:
1944
Jun 1986–May 1991
60-Month		89.41"
(2,271.01mm)		90.24"
(2,292.10mm)		-0.83"
(-21.09mm)		53rd Driest
Driest since:
2022
71st Wettest
Wettest since:
1987

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