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 2015

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
May 2015
1-Month
5.30"
(134.62mm)
2.02"
(51.31mm)
3.28"
(83.31mm)
128th Driest
Driest since:
1974
1st Wettest
Wettest to Date
2015
Apr–May 2015
2-Month
7.18"
(182.37mm)
3.86"
(98.04mm)
3.32"
(84.33mm)
126th Driest
Driest since:
2002
3rd Wettest
Wettest since:
1957
Mar–May 2015
3-Month
8.04"
(204.22mm)
5.37"
(136.40mm)
2.67"
(67.82mm)
123rd Driest
Driest since:
2002
6th Wettest
Wettest since:
1957
Feb–May 2015
4-Month
9.39"
(238.51mm)
6.46"
(164.08mm)
2.93"
(74.43mm)
123rd Driest
Driest since:
2002
6th Wettest
Wettest since:
1905
Jan–May 2015
5-Month
10.04"
(255.02mm)
7.52"
(191.01mm)
2.52"
(64.01mm)
121st Driest
Driest since:
2002
8th Wettest
Wettest since:
1957
Dec 2014–May 2015
6-Month
11.35"
(288.29mm)
8.60"
(218.44mm)
2.75"
(69.85mm)
119th Driest
Driest since:
2002
9th Wettest
Wettest since:
1957
Nov 2014–May 2015
7-Month
12.47"
(316.74mm)
9.66"
(245.36mm)
2.81"
(71.38mm)
119th Driest
Driest since:
2002
9th Wettest
Wettest since:
1957
Oct 2014–May 2015
8-Month
13.55"
(344.17mm)
11.00"
(279.40mm)
2.55"
(64.77mm)
115th Driest
Driest since:
2002
13th Wettest
Wettest since:
1995
Sep 2014–May 2015
9-Month
15.63"
(397.00mm)
12.43"
(315.72mm)
3.20"
(81.28mm)
120th Driest
Driest since:
2002
8th Wettest
Wettest since:
1942
Aug 2014–May 2015
10-Month
18.22"
(462.79mm)
14.44"
(366.78mm)
3.78"
(96.01mm)
124th Driest
Driest since:
2002
4th Wettest
Wettest since:
1942
Jul 2014–May 2015
11-Month
20.98"
(532.89mm)
16.54"
(420.12mm)
4.44"
(112.77mm)
125th Driest
Driest since:
2002
3rd Wettest
Wettest since:
1942
Jun 2014–May 2015
12-Month
22.17"
(563.12mm)
18.08"
(459.23mm)
4.09"
(103.89mm)
124th Driest
Driest since:
2002
4th Wettest
Wettest since:
1942
Dec 2013–May 2015
18-Month
30.00"
(762.00mm)
26.70"
(678.18mm)
3.30"
(83.82mm)
114th Driest
Driest since:
2013
13th Wettest
Wettest since:
1942
Jun 2013–May 2015
24-Month
41.88"
(1,063.75mm)
36.18"
(918.97mm)
5.70"
(144.78mm)
121st Driest
Driest since:
1902
6th Wettest
Wettest since:
1942
Jun 2012–May 2015
36-Month
55.49"
(1,409.45mm)
54.21"
(1,376.93mm)
1.28"
(32.52mm)
83rd Driest
Driest since:
2022
43rd Wettest
Wettest since:
1943
Ties: 1909
Jun 2011–May 2015
48-Month
70.19"
(1,782.83mm)
72.23"
(1,834.64mm)
-2.04"
(-51.81mm)
45th Driest
Driest since:
1956
80th Wettest
Wettest since:
1944
Jun 2010–May 2015
60-Month
88.79"
(2,255.27mm)
90.24"
(2,292.10mm)
-1.45"
(-36.83mm)
49th Driest
Driest since:
2022
75th Wettest
Wettest since:
1987

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