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, July 2009

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
July 2009
1-Month
2.31"
(58.67mm)
2.10"
(53.34mm)
0.21"
(5.33mm)
82nd Driest
Driest since:
1900
47th Wettest
Wettest since:
1998
Ties: 1913
Jun–Jul 2009
2-Month
4.95"
(125.73mm)
3.65"
(92.71mm)
1.30"
(33.02mm)
117th Driest
Driest since:
1924
12th Wettest
Wettest since:
1965
May–Jul 2009
3-Month
6.89"
(175.01mm)
5.66"
(143.76mm)
1.23"
(31.25mm)
110th Driest
Driest since:
2002
19th Wettest
Wettest since:
2015
Ties: 1904
Apr–Jul 2009
4-Month
9.25"
(234.95mm)
7.50"
(190.50mm)
1.75"
(44.45mm)
114th Driest
Driest since:
2002
15th Wettest
Wettest since:
1957
Mar–Jul 2009
5-Month
10.38"
(263.65mm)
9.02"
(229.11mm)
1.36"
(34.54mm)
104th Driest
Driest since:
2002
25th Wettest
Wettest since:
1957
Feb–Jul 2009
6-Month
11.16"
(283.46mm)
10.11"
(256.79mm)
1.05"
(26.67mm)
102nd Driest
Driest since:
2002
27th Wettest
Wettest since:
1995
Jan–Jul 2009
7-Month
12.14"
(308.36mm)
11.17"
(283.72mm)
0.97"
(24.64mm)
99th Driest
Driest since:
2002
30th Wettest
Wettest since:
1957
Dec 2008–Jul 2009
8-Month
13.97"
(354.84mm)
12.24"
(310.90mm)
1.73"
(43.94mm)
105th Driest
Driest since:
2002
23rd Wettest
Wettest since:
1957
Nov 2008–Jul 2009
9-Month
14.89"
(378.21mm)
13.31"
(338.07mm)
1.58"
(40.14mm)
102nd Driest
Driest since:
2002
26th Wettest
Wettest since:
1957
Oct 2008–Jul 2009
10-Month
16.16"
(410.46mm)
14.64"
(371.86mm)
1.52"
(38.60mm)
96th Driest
Driest since:
2002
32nd Wettest
Wettest since:
1995
Sep 2008–Jul 2009
11-Month
17.26"
(438.40mm)
16.07"
(408.18mm)
1.19"
(30.22mm)
87th Driest
Driest since:
2002
41st Wettest
Wettest since:
1995
Aug 2008–Jul 2009
12-Month
20.40"
(518.16mm)
18.08"
(459.23mm)
2.32"
(58.93mm)
107th Driest
Driest since:
2002
21st Wettest
Wettest since:
1995
Feb 2008–Jul 2009
18-Month
28.00"
(711.20mm)
28.21"
(716.53mm)
-0.21"
(-5.33mm)
63rd Driest
Driest since:
2002, 2013
65th Wettest
Wettest since:
1942
Ties: 1897
Aug 2007–Jul 2009
24-Month
37.92"
(963.17mm)
36.18"
(918.97mm)
1.74"
(44.20mm)
95th Driest
Driest since:
1902
32nd Wettest
Wettest since:
1942
Aug 2006–Jul 2009
36-Month
58.30"
(1,480.82mm)
54.23"
(1,377.44mm)
4.07"
(103.38mm)
104th Driest
Driest since:
1956
22nd Wettest
Wettest since:
1943
Aug 2005–Jul 2009
48-Month
74.79"
(1,899.67mm)
72.25"
(1,835.15mm)
2.54"
(64.52mm)
85th Driest
Driest since:
1956
40th Wettest
Wettest since:
1944
Aug 2004–Jul 2009
60-Month
93.88"
(2,384.55mm)
90.27"
(2,292.86mm)
3.61"
(91.69mm)
87th Driest
Driest since:
1954
37th Wettest
Wettest since:
1999

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