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, April 2020

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
April 2020
1-Month
0.80"
(20.32mm)
1.84"
(46.74mm)
-1.04"
(-26.42mm)
9th Driest
Driest since:
2002
120th Wettest
Wettest since:
1900
Mar–Apr 2020
2-Month
2.15"
(54.61mm)
3.35"
(85.09mm)
-1.20"
(-30.48mm)
18th Driest
Driest since:
2002
111th Wettest
Wettest since:
1906
Ties: 1913, 2008
Feb–Apr 2020
3-Month
3.24"
(82.30mm)
4.44"
(112.78mm)
-1.20"
(-30.48mm)
21st Driest
Driest since:
2002
108th Wettest
Wettest since:
1905
Jan–Apr 2020
4-Month
3.96"
(100.58mm)
5.51"
(139.95mm)
-1.55"
(-39.37mm)
15th Driest
Driest since:
2002
114th Wettest
Wettest since:
1905
Ties: 2006
Dec 2019–Apr 2020
5-Month
5.23"
(132.84mm)
6.58"
(167.13mm)
-1.35"
(-34.29mm)
20th Driest
Driest since:
2002
108th Wettest
Wettest since:
1905
Nov 2019–Apr 2020
6-Month
6.34"
(161.04mm)
7.65"
(194.31mm)
-1.31"
(-33.27mm)
29th Driest
Driest since:
1904
99th Wettest
Wettest since:
1984
Oct 2019–Apr 2020
7-Month
7.31"
(185.67mm)
8.98"
(228.09mm)
-1.67"
(-42.42mm)
29th Driest
Driest since:
2002
99th Wettest
Wettest since:
1942
Sep 2019–Apr 2020
8-Month
8.02"
(203.71mm)
10.41"
(264.41mm)
-2.39"
(-60.70mm)
9th Driest
Driest since:
1902, 2002
119th Wettest
Wettest since:
1942
Aug 2019–Apr 2020
9-Month
9.49"
(241.05mm)
12.42"
(315.47mm)
-2.93"
(-74.42mm)
12th Driest
Driest since:
2002
116th Wettest
Wettest since:
1942
Jul 2019–Apr 2020
10-Month
11.07"
(281.18mm)
14.52"
(368.81mm)
-3.45"
(-87.63mm)
9th Driest
Driest since:
1902
119th Wettest
Wettest since:
1942
Jun 2019–Apr 2020
11-Month
12.85"
(326.39mm)
16.07"
(408.18mm)
-3.22"
(-81.79mm)
15th Driest
Driest since:
1981
113th Wettest
Wettest since:
1942
Ties: 1936
May 2019–Apr 2020
12-Month
15.69"
(398.53mm)
18.08"
(459.23mm)
-2.39"
(-60.70mm)
25th Driest
Driest since:
2013
103rd Wettest
Wettest since:
1942
Nov 2018–Apr 2020
18-Month
24.49"
(622.05mm)
25.76"
(654.30mm)
-1.27"
(-32.25mm)
48th Driest
Driest since:
2013
79th Wettest
Wettest since:
1942
May 2018–Apr 2020
24-Month
33.62"
(853.95mm)
36.16"
(918.46mm)
-2.54"
(-64.51mm)
34th Driest
Driest since:
1902
93rd Wettest
Wettest since:
1942
May 2017–Apr 2020
36-Month
50.09"
(1,272.29mm)
54.22"
(1,377.19mm)
-4.13"
(-104.90mm)
29th Driest
Driest since:
1955
97th Wettest
Wettest since:
1985
May 2016–Apr 2020
48-Month
67.93"
(1,725.42mm)
72.24"
(1,834.90mm)
-4.31"
(-109.48mm)
31st Driest
Driest since:
1904
94th Wettest
Wettest since:
1986
May 2015–Apr 2020
60-Month
90.81"
(2,306.57mm)
90.24"
(2,292.10mm)
0.57"
(14.47mm)
62nd Driest
Driest since:
1957
62nd Wettest
Wettest since:
1987

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