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 1939

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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
September 1939
1-Month 		1.38"
(35.05mm)		 1.43"
(36.32mm)		 -0.05"
(-1.27mm)		 71st Driest
Driest since:
 1956
58th Wettest
Wettest since:
 2013
Aug–Sep 1939
2-Month 		2.49"
(63.25mm)		 3.46"
(87.88mm)		 -0.97"
(-24.63mm)		 24th Driest
Driest since:
 1944
105th Wettest
Wettest since:
 2013
Jul–Sep 1939
3-Month 		3.52"
(89.41mm)		 5.56"
(141.22mm)		 -2.04"
(-51.81mm)		 6th Driest
Driest since:
 1900
123rd Wettest
Wettest since:
 2013
Jun–Sep 1939
4-Month 		4.39"
(111.51mm)		 7.10"
(180.34mm)		 -2.71"
(-68.83mm)		 2nd Driest
Driest since:
 1924
127th Wettest
Wettest since:
 1965
May–Sep 1939
5-Month 		5.41"
(137.41mm)		 9.12"
(231.65mm)		 -3.71"
(-94.24mm)		 1st Driest
Driest to Date
 1939
128th Wettest
Wettest since:
 1965
Apr–Sep 1939
6-Month 		6.39"
(162.31mm)		 10.96"
(278.38mm)		 -4.57"
(-116.07mm)		 1st Driest
Driest to Date
 1939
128th Wettest
Wettest since:
 1999
Mar–Sep 1939
7-Month 		7.80"
(198.12mm)		 12.47"
(316.74mm)		 -4.67"
(-118.62mm)		 3rd Driest
Driest to Date
 2002
126th Wettest
Wettest since:
 1941
Feb–Sep 1939
8-Month 		9.14"
(232.16mm)		 13.56"
(344.42mm)		 -4.42"
(-112.26mm)		 5th Driest
Driest to Date
 2002
124th Wettest
Wettest since:
 1941
Jan–Sep 1939
9-Month 		10.80"
(274.32mm)		 14.62"
(371.35mm)		 -3.82"
(-97.03mm)		 5th Driest
Driest since:
 2002
124th Wettest
Wettest since:
 1957
Dec 1938–Sep 1939
10-Month 		11.99"
(304.55mm)		 15.70"
(398.78mm)		 -3.71"
(-94.23mm)		 7th Driest
Driest since:
 2002
121st Wettest
Wettest since:
 1957
Ties: 1931
Nov 1938–Sep 1939
11-Month 		13.01"
(330.45mm)		 16.76"
(425.70mm)		 -3.75"
(-95.25mm)		 7th Driest
Driest since:
 2002
121st Wettest
Wettest since:
 1941
Oct 1938–Sep 1939
12-Month 		14.14"
(359.16mm)		 18.10"
(459.74mm)		 -3.96"
(-100.58mm)		 8th Driest
Driest since:
 2002
120th Wettest
Wettest since:
 1995
Apr 1938–Sep 1939
18-Month 		26.96"
(684.78mm)		 29.08"
(738.63mm)		 -2.12"
(-53.85mm)		 40th Driest
Driest since:
 2002
88th Wettest
Wettest since:
 1942
Oct 1937–Sep 1939
24-Month 		35.27"
(895.86mm)		 36.22"
(919.99mm)		 -0.95"
(-24.13mm)		 48th Driest
Driest since:
 2003
79th Wettest
Wettest since:
 1942
Oct 1936–Sep 1939
36-Month 		51.01"
(1,295.65mm)		 54.27"
(1,378.46mm)		 -3.26"
(-82.81mm)		 34th Driest
Driest since:
 1956
92nd Wettest
Wettest since:
 1997
Oct 1935–Sep 1939
48-Month 		67.26"
(1,708.40mm)		 72.31"
(1,836.67mm)		 -5.05"
(-128.27mm)		 25th Driest
Driest since:
 1956
100th Wettest
Wettest since:
 1998
Oct 1934–Sep 1939
60-Month 		84.88"
(2,155.95mm)		 90.33"
(2,294.38mm)		 -5.45"
(-138.43mm)		 29th Driest
Driest since:
 2022
95th Wettest
Wettest since:
 1999

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