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 1987

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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
May 1987
1-Month 		3.22"
(81.79mm)		 2.02"
(51.31mm)		 1.20"
(30.48mm)		 120th Driest
Driest since:
 1974
9th Wettest
Wettest since:
 2015
Apr–May 1987
2-Month 		4.08"
(103.63mm)		 3.86"
(98.04mm)		 0.22"
(5.59mm)		 85th Driest
Driest since:
 2002
44th Wettest
Wettest since:
 1957
Mar–May 1987
3-Month 		5.71"
(145.03mm)		 5.37"
(136.40mm)		 0.34"
(8.63mm)		 83rd Driest
Driest since:
 2002
46th Wettest
Wettest since:
 1957
Feb–May 1987
4-Month 		7.52"
(191.01mm)		 6.46"
(164.08mm)		 1.06"
(26.93mm)		 108th Driest
Driest since:
 2002
21st Wettest
Wettest since:
 1905
Jan–May 1987
5-Month 		8.63"
(219.20mm)		 7.52"
(191.01mm)		 1.11"
(28.19mm)		 104th Driest
Driest since:
 2002
25th Wettest
Wettest since:
 1957
Dec 1986–May 1987
6-Month 		9.22"
(234.19mm)		 8.60"
(218.44mm)		 0.62"
(15.75mm)		 90th Driest
Driest since:
 2002
38th Wettest
Wettest since:
 1957
Nov 1986–May 1987
7-Month 		11.00"
(279.40mm)		 9.66"
(245.36mm)		 1.34"
(34.04mm)		 102nd Driest
Driest since:
 2002
26th Wettest
Wettest since:
 1957
Oct 1986–May 1987
8-Month 		13.12"
(333.25mm)		 11.00"
(279.40mm)		 2.12"
(53.85mm)		 107th Driest
Driest since:
 2002
21st Wettest
Wettest since:
 1995
Sep 1986–May 1987
9-Month 		15.18"
(385.57mm)		 12.43"
(315.72mm)		 2.75"
(69.85mm)		 116th Driest
Driest since:
 2002
12th Wettest
Wettest since:
 1942
Aug 1986–May 1987
10-Month 		17.31"
(439.67mm)		 14.44"
(366.78mm)		 2.87"
(72.89mm)		 117th Driest
Driest since:
 2002
11th Wettest
Wettest since:
 1942
Jul 1986–May 1987
11-Month 		19.64"
(498.86mm)		 16.54"
(420.12mm)		 3.10"
(78.74mm)		 118th Driest
Driest since:
 2002
10th Wettest
Wettest since:
 1942
Jun 1986–May 1987
12-Month 		21.72"
(551.69mm)		 18.08"
(459.23mm)		 3.64"
(92.46mm)		 121st Driest
Driest since:
 2002
7th Wettest
Wettest since:
 1942
Dec 1985–May 1987
18-Month 		29.35"
(745.49mm)		 26.70"
(678.18mm)		 2.65"
(67.31mm)		 104th Driest
Driest since:
 2013
23rd Wettest
Wettest since:
 1942
Jun 1985–May 1987
24-Month 		40.63"
(1,032.00mm)		 36.18"
(918.97mm)		 4.45"
(113.03mm)		 115th Driest
Driest since:
 1902
12th Wettest
Wettest since:
 1942
Jun 1984–May 1987
36-Month 		62.32"
(1,582.93mm)		 54.21"
(1,376.93mm)		 8.11"
(206.00mm)		 121st Driest
Driest since:
 2022
5th Wettest
Wettest since:
 1943
Jun 1983–May 1987
48-Month 		82.19"
(2,087.63mm)		 72.23"
(1,834.64mm)		 9.96"
(252.99mm)		 122nd Driest
Driest since:
 1956
3rd Wettest
Wettest since:
 1944
Jun 1982–May 1987
60-Month 		104.14"
(2,645.16mm)		 90.24"
(2,292.10mm)		 13.90"
(353.06mm)		 123rd Driest
Driest since:
 2022
1st Wettest
Wettest to Date
 1987

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