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 1956

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
September 1956
1-Month 		0.11"
(2.79mm)		 1.43"
(36.32mm)		 -1.32"
(-33.53mm)		 1st Driest
Driest to Date
 1956
128th Wettest
Wettest since:
 2013
Aug–Sep 1956
2-Month 		1.63"
(41.40mm)		 3.46"
(87.88mm)		 -1.83"
(-46.48mm)		 2nd Driest
Driest since:
 1944
127th Wettest
Wettest since:
 2013
Jul–Sep 1956
3-Month 		3.68"
(93.47mm)		 5.56"
(141.22mm)		 -1.88"
(-47.75mm)		 9th Driest
Driest since:
 1900
120th Wettest
Wettest since:
 2013
Jun–Sep 1956
4-Month 		4.42"
(112.27mm)		 7.10"
(180.34mm)		 -2.68"
(-68.07mm)		 4th Driest
Driest since:
 1924
125th Wettest
Wettest since:
 1965
Ties: 1900
May–Sep 1956
5-Month 		5.64"
(143.26mm)		 9.12"
(231.65mm)		 -3.48"
(-88.39mm)		 3rd Driest
Driest since:
 1939
126th Wettest
Wettest since:
 1965
Apr–Sep 1956
6-Month 		7.12"
(180.85mm)		 10.96"
(278.38mm)		 -3.84"
(-97.53mm)		 5th Driest
Driest since:
 1939
124th Wettest
Wettest since:
 1999
Mar–Sep 1956
7-Month 		7.85"
(199.39mm)		 12.47"
(316.74mm)		 -4.62"
(-117.35mm)		 4th Driest
Driest since:
 2002
125th Wettest
Wettest since:
 1941
Feb–Sep 1956
8-Month 		8.96"
(227.58mm)		 13.56"
(344.42mm)		 -4.60"
(-116.84mm)		 2nd Driest
Driest to Date
 2002
127th Wettest
Wettest since:
 1941
Jan–Sep 1956
9-Month 		10.83"
(275.08mm)		 14.62"
(371.35mm)		 -3.79"
(-96.27mm)		 6th Driest
Driest since:
 2002
123rd Wettest
Wettest since:
 1957
Dec 1955–Sep 1956
10-Month 		11.70"
(297.18mm)		 15.70"
(398.78mm)		 -4.00"
(-101.60mm)		 5th Driest
Driest to Date
 2002
123rd Wettest
Wettest since:
 1957
Nov 1955–Sep 1956
11-Month 		12.98"
(329.69mm)		 16.76"
(425.70mm)		 -3.78"
(-96.01mm)		 6th Driest
Driest since:
 2002
122nd Wettest
Wettest since:
 1941
Oct 1955–Sep 1956
12-Month 		13.44"
(341.38mm)		 18.10"
(459.74mm)		 -4.66"
(-118.36mm)		 6th Driest
Driest since:
 2002
122nd Wettest
Wettest since:
 1995
Apr 1955–Sep 1956
18-Month 		23.30"
(591.82mm)		 29.08"
(738.63mm)		 -5.78"
(-146.81mm)		 5th Driest
Driest since:
 2002
123rd Wettest
Wettest since:
 1942
Oct 1954–Sep 1956
24-Month 		29.05"
(737.87mm)		 36.22"
(919.99mm)		 -7.17"
(-182.12mm)		 3rd Driest
Driest to Date
 2003
124th Wettest
Wettest since:
 1942
Oct 1953–Sep 1956
36-Month 		43.91"
(1,115.31mm)		 54.27"
(1,378.46mm)		 -10.36"
(-263.15mm)		 1st Driest
Driest to Date
 1956
125th Wettest
Wettest since:
 1997
Oct 1952–Sep 1956
48-Month 		58.78"
(1,493.01mm)		 72.31"
(1,836.67mm)		 -13.53"
(-343.66mm)		 1st Driest
Driest to Date
 1956
124th Wettest
Wettest since:
 1998
Oct 1951–Sep 1956
60-Month 		77.93"
(1,979.42mm)		 90.33"
(2,294.38mm)		 -12.40"
(-314.96mm)		 2nd Driest
Driest to Date
 2022
122nd Wettest
Wettest since:
 1999

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