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, January 1899

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2023)
Wettest/Driest
Since
Record
January 1899
1-Month
1.07"
(27.18mm)
1.06"
(26.92mm)
0.01"
(0.26mm)
80th Driest
Driest since:
1919, 1931
50th Wettest
Wettest since:
1916
Ties: 1917, 1999
Dec 1898–Jan 1899
2-Month
2.26"
(57.40mm)
2.13"
(54.10mm)
0.13"
(3.30mm)
79th Driest
Driest since:
1931
50th Wettest
Wettest since:
1914
Nov 1898–Jan 1899
3-Month
3.46"
(87.88mm)
3.20"
(81.28mm)
0.26"
(6.60mm)
91st Driest
Driest since:
1904
38th Wettest
Wettest since:
1979
Oct 1898–Jan 1899
4-Month
4.25"
(107.95mm)
4.54"
(115.32mm)
-0.29"
(-7.37mm)
48th Driest
Driest since:
1977
81st Wettest
Wettest since:
1909
Ties: 2012
Sep 1898–Jan 1899
5-Month
5.05"
(128.27mm)
5.96"
(151.38mm)
-0.91"
(-23.11mm)
34th Driest
Driest to Date
1904
95th Wettest
Wettest since:
1942
Aug 1898–Jan 1899
6-Month
6.50"
(165.10mm)
7.98"
(202.69mm)
-1.48"
(-37.59mm)
21st Driest
Driest to Date
1901
108th Wettest
Wettest since:
1942
Ties: 1927
Jul 1898–Jan 1899
7-Month
8.86"
(225.04mm)
10.08"
(256.03mm)
-1.22"
(-30.99mm)
32nd Driest
Driest to Date
1901
97th Wettest
Wettest since:
2007
Jun 1898–Jan 1899
8-Month
10.47"
(265.94mm)
11.62"
(295.15mm)
-1.15"
(-29.21mm)
41st Driest
Driest to Date
1901, 1981
88th Wettest
Wettest since:
1942
Ties: 1956
May 1898–Jan 1899
9-Month
14.09"
(357.89mm)
13.64"
(346.46mm)
0.45"
(11.43mm)
76th Driest
Driest since:
1901
53rd Wettest
Wettest since:
1942
Ties: 1979
Apr 1898–Jan 1899
10-Month
15.61"
(396.49mm)
15.52"
(394.21mm)
0.09"
(2.28mm)
70th Driest
Driest since:
1940
59th Wettest
Wettest since:
1942
Mar 1898–Jan 1899
11-Month
16.62"
(422.15mm)
17.02"
(432.31mm)
-0.40"
(-10.16mm)
55th Driest
Driest since:
2021
74th Wettest
Wettest since:
1942
Feb 1898–Jan 1899
12-Month
17.06"
(433.32mm)
18.10"
(459.74mm)
-1.04"
(-26.42mm)
48th Driest
Driest since:
2003
81st Wettest
Wettest since:
1942
Aug 1897–Jan 1899
18-Month
26.53"
(673.86mm)
26.08"
(662.43mm)
0.45"
(11.43mm)
74th Driest
Driest since:
2003
54th Wettest
Wettest since:
1942
Feb 1897–Jan 1899
24-Month
38.37"
(974.60mm)
36.16"
(918.46mm)
2.21"
(56.14mm)
98th Driest
Driest since:
2003
30th Wettest
Wettest to Date
1943
Feb 1896–Jan 1899
36-Month
54.53"
(1,385.06mm)
54.20"
(1,376.68mm)
0.33"
(8.38mm)
64th Driest
Driest to Date
1977
63rd Wettest
Wettest since:
1943
Feb 1895–Jan 1899
48-Month
73.32"
(1,862.33mm)
72.24"
(1,834.90mm)
1.08"
(27.43mm)
77th Driest
Driest to Date
1957
49th Wettest
Wettest to Date
1987

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