Divisional Rankings

Divisional 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, Climate Division 2. Colorado Drainage

Precipitation Rankings, May 2021

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
May 2021
1-Month
1.27"
(32.26mm)
1.66"
(42.16mm)
-0.39"
(-9.90mm)
48th Driest
Driest since:
1974
81st Wettest
Wettest since:
1995
Ties: 1964, 2005
Apr–May 2021
2-Month
1.97"
(50.04mm)
3.69"
(93.73mm)
-1.72"
(-43.69mm)
12th Driest
Driest since:
1899
117th Wettest
Wettest since:
1957
Mar–May 2021
3-Month
3.90"
(99.06mm)
5.83"
(148.08mm)
-1.93"
(-49.02mm)
19th Driest
Driest since:
2012
110th Wettest
Wettest since:
1906
Feb–May 2021
4-Month
5.68"
(144.27mm)
7.63"
(193.80mm)
-1.95"
(-49.53mm)
22nd Driest
Driest since:
2002
107th Wettest
Wettest since:
1906
Jan–May 2021
5-Month
6.74"
(171.20mm)
9.50"
(241.30mm)
-2.76"
(-70.10mm)
13th Driest
Driest since:
2002
116th Wettest
Wettest since:
1957
Dec 2020–May 2021
6-Month
8.17"
(207.52mm)
11.28"
(286.51mm)
-3.11"
(-78.99mm)
13th Driest
Driest since:
2002
115th Wettest
Wettest since:
1957
Nov 2020–May 2021
7-Month
9.56"
(242.82mm)
12.88"
(327.15mm)
-3.32"
(-84.33mm)
11th Driest
Driest since:
1977
117th Wettest
Wettest since:
1979
Oct 2020–May 2021
8-Month
10.24"
(260.10mm)
14.68"
(372.87mm)
-4.44"
(-112.77mm)
7th Driest
Driest since:
1977
121st Wettest
Wettest since:
1979
Sep 2020–May 2021
9-Month
11.25"
(285.75mm)
16.35"
(415.29mm)
-5.10"
(-129.54mm)
5th Driest
Driest since:
1977
123rd Wettest
Wettest since:
1995
Aug 2020–May 2021
10-Month
11.68"
(296.67mm)
18.17"
(461.52mm)
-6.49"
(-164.85mm)
3rd Driest
Driest since:
1977
125th Wettest
Wettest since:
1995
Jul 2020–May 2021
11-Month
12.82"
(325.63mm)
19.80"
(502.92mm)
-6.98"
(-177.29mm)
3rd Driest
Driest since:
1977
125th Wettest
Wettest since:
1920
Jun 2020–May 2021
12-Month
13.74"
(349.00mm)
20.84"
(529.34mm)
-7.10"
(-180.34mm)
3rd Driest
Driest since:
1977
125th Wettest
Wettest since:
1985
Dec 2019–May 2021
18-Month
22.67"
(575.82mm)
32.10"
(815.34mm)
-9.43"
(-239.52mm)
2nd Driest
Driest since:
1977
125th Wettest
Wettest since:
1958
Jun 2019–May 2021
24-Month
28.99"
(736.35mm)
41.68"
(1,058.67mm)
-12.69"
(-322.32mm)
2nd Driest
Driest since:
1902
125th Wettest
Wettest since:
1985
Jun 2018–May 2021
36-Month
51.72"
(1,313.69mm)
62.45"
(1,586.23mm)
-10.73"
(-272.54mm)
9th Driest
Driest since:
1902
117th Wettest
Wettest since:
1986
Jun 2017–May 2021
48-Month
66.57"
(1,690.88mm)
83.20"
(2,113.28mm)
-16.63"
(-422.40mm)
3rd Driest
Driest since:
1902
122nd Wettest
Wettest since:
1986
Jun 2016–May 2021
60-Month
87.32"
(2,217.93mm)
103.95"
(2,640.33mm)
-16.63"
(-422.40mm)
5th Driest
Driest since:
1904
119th Wettest
Wettest since:
1987

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