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, September 1998

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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
September 1998
1-Month
0.89"
(22.61mm)
1.43"
(36.32mm)
-0.54"
(-13.71mm)
34th Driest
Driest since:
1956
95th Wettest
Wettest since:
2013
Aug–Sep 1998
2-Month
2.74"
(69.60mm)
3.46"
(87.88mm)
-0.72"
(-18.28mm)
31st Driest
Driest since:
1944
98th Wettest
Wettest since:
2013
Jul–Sep 1998
3-Month
6.53"
(165.86mm)
5.56"
(141.22mm)
0.97"
(24.64mm)
108th Driest
Driest since:
1900
21st Wettest
Wettest since:
2013
Jun–Sep 1998
4-Month
7.74"
(196.60mm)
7.10"
(180.34mm)
0.64"
(16.26mm)
88th Driest
Driest since:
1924
41st Wettest
Wettest since:
1965
May–Sep 1998
5-Month
8.80"
(223.52mm)
9.12"
(231.65mm)
-0.32"
(-8.13mm)
56th Driest
Driest since:
1939
73rd Wettest
Wettest since:
1965
Ties: 1955, 1970
Apr–Sep 1998
6-Month
10.57"
(268.48mm)
10.96"
(278.38mm)
-0.39"
(-9.90mm)
63rd Driest
Driest since:
1939
66th Wettest
Wettest since:
1999
Mar–Sep 1998
7-Month
12.42"
(315.47mm)
12.47"
(316.74mm)
-0.05"
(-1.27mm)
72nd Driest
Driest since:
2002
57th Wettest
Wettest since:
1941
Feb–Sep 1998
8-Month
13.50"
(342.90mm)
13.56"
(344.42mm)
-0.06"
(-1.52mm)
69th Driest
Driest since:
2002
60th Wettest
Wettest since:
1941
Jan–Sep 1998
9-Month
14.30"
(363.22mm)
14.62"
(371.35mm)
-0.32"
(-8.13mm)
63rd Driest
Driest since:
2002
66th Wettest
Wettest since:
1957
Dec 1997–Sep 1998
10-Month
15.16"
(385.06mm)
15.70"
(398.78mm)
-0.54"
(-13.72mm)
55th Driest
Driest since:
2002
73rd Wettest
Wettest since:
1957
Nov 1997–Sep 1998
11-Month
16.39"
(416.31mm)
16.76"
(425.70mm)
-0.37"
(-9.39mm)
64th Driest
Driest since:
2002
64th Wettest
Wettest since:
1941
Oct 1997–Sep 1998
12-Month
18.64"
(473.46mm)
18.10"
(459.74mm)
0.54"
(13.72mm)
76th Driest
Driest since:
2002
52nd Wettest
Wettest since:
1995
Apr 1997–Sep 1998
18-Month
33.23"
(844.04mm)
29.08"
(738.63mm)
4.15"
(105.41mm)
120th Driest
Driest since:
2002
8th Wettest
Wettest since:
1942
Oct 1996–Sep 1998
24-Month
40.80"
(1,036.32mm)
36.22"
(919.99mm)
4.58"
(116.33mm)
117th Driest
Driest since:
2003
10th Wettest
Wettest since:
1942
Oct 1995–Sep 1998
36-Month
58.51"
(1,486.15mm)
54.27"
(1,378.46mm)
4.24"
(107.69mm)
108th Driest
Driest since:
1956
18th Wettest
Wettest since:
1997
Oct 1994–Sep 1998
48-Month
82.49"
(2,095.25mm)
72.31"
(1,836.67mm)
10.18"
(258.58mm)
124th Driest
Driest since:
1956
1st Wettest
Wettest to Date
1998
Oct 1993–Sep 1998
60-Month
99.27"
(2,521.46mm)
90.33"
(2,294.38mm)
8.94"
(227.08mm)
117th Driest
Driest since:
2022
7th Wettest
Wettest since:
1999

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