Statewide Rankings

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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 1931

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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
September 1931 1-Month	1.44" (36.58mm)	1.43" (36.32mm)	0.01" (0.26mm)	75th Driest	Driest since: 1930	1956
	1.44" (36.58mm)	1.43" (36.32mm)	0.01" (0.26mm)	54th Wettest	Wettest since: 1929	2013
	Ties: 2003
Aug–Sep 1931 2-Month	2.85" (72.39mm)	3.46" (87.88mm)	-0.61" (-15.49mm)	34th Driest	Driest since: 1928	1944
	2.85" (72.39mm)	3.46" (87.88mm)	-0.61" (-15.49mm)	95th Wettest	Wettest since: 1930	2013
	Ties: 1934
Jul–Sep 1931 3-Month	4.26" (108.20mm)	5.56" (141.22mm)	-1.30" (-33.02mm)	20th Driest	Driest since: 1928	1900
Jul–Sep 1931 3-Month	4.26" (108.20mm)	5.56" (141.22mm)	-1.30" (-33.02mm)	109th Wettest	Wettest since: 1930	2013
Jun–Sep 1931 4-Month	5.42" (137.67mm)	7.10" (180.34mm)	-1.68" (-42.67mm)	16th Driest	Driest since: 1924	1924
Jun–Sep 1931 4-Month	5.42" (137.67mm)	7.10" (180.34mm)	-1.68" (-42.67mm)	113th Wettest	Wettest since: 1930	1965
May–Sep 1931 5-Month	7.13" (181.10mm)	9.12" (231.65mm)	-1.99" (-50.55mm)	15th Driest	Driest since: 1924	1939
May–Sep 1931 5-Month	7.13" (181.10mm)	9.12" (231.65mm)	-1.99" (-50.55mm)	114th Wettest	Wettest since: 1930	1965
Apr–Sep 1931 6-Month	8.68" (220.47mm)	10.96" (278.38mm)	-2.28" (-57.91mm)	15th Driest	Driest since: 1924	1939
Apr–Sep 1931 6-Month	8.68" (220.47mm)	10.96" (278.38mm)	-2.28" (-57.91mm)	114th Wettest	Wettest since: 1930	1999
Mar–Sep 1931 7-Month	10.02" (254.51mm)	12.47" (316.74mm)	-2.45" (-62.23mm)	17th Driest	Driest since: 1924	2002
Mar–Sep 1931 7-Month	10.02" (254.51mm)	12.47" (316.74mm)	-2.45" (-62.23mm)	112th Wettest	Wettest since: 1930	1941
Feb–Sep 1931 8-Month	11.49" (291.85mm)	13.56" (344.42mm)	-2.07" (-52.57mm)	19th Driest	Driest since: 1924	2002
Feb–Sep 1931 8-Month	11.49" (291.85mm)	13.56" (344.42mm)	-2.07" (-52.57mm)	110th Wettest	Wettest since: 1930	1941
Jan–Sep 1931 9-Month	11.66" (296.16mm)	14.62" (371.35mm)	-2.96" (-75.19mm)	14th Driest	Driest since: 1924	2002
Jan–Sep 1931 9-Month	11.66" (296.16mm)	14.62" (371.35mm)	-2.96" (-75.19mm)	115th Wettest	Wettest since: 1930	1957
Dec 1930–Sep 1931 10-Month	11.99" (304.55mm)	15.70" (398.78mm)	-3.71" (-94.23mm)	7th Driest	Driest to Date	2002
	11.99" (304.55mm)	15.70" (398.78mm)	-3.71" (-94.23mm)	121st Wettest	Wettest since: 1930	1957
	Ties: 1939
Nov 1930–Sep 1931 11-Month	13.61" (345.69mm)	16.76" (425.70mm)	-3.15" (-80.01mm)	14th Driest	Driest since: 1924	2002
Nov 1930–Sep 1931 11-Month	13.61" (345.69mm)	16.76" (425.70mm)	-3.15" (-80.01mm)	114th Wettest	Wettest since: 1930	1941
Oct 1930–Sep 1931 12-Month	14.84" (376.94mm)	18.10" (459.74mm)	-3.26" (-82.80mm)	13th Driest	Driest since: 1902	2002
Oct 1930–Sep 1931 12-Month	14.84" (376.94mm)	18.10" (459.74mm)	-3.26" (-82.80mm)	115th Wettest	Wettest since: 1930	1995
Apr 1930–Sep 1931 18-Month	26.67" (677.42mm)	29.08" (738.63mm)	-2.41" (-61.21mm)	36th Driest	Driest since: 1925	2002
Apr 1930–Sep 1931 18-Month	26.67" (677.42mm)	29.08" (738.63mm)	-2.41" (-61.21mm)	92nd Wettest	Wettest since: 1930	1942
Oct 1929–Sep 1931 24-Month	32.39" (822.71mm)	36.22" (919.99mm)	-3.83" (-97.28mm)	25th Driest	Driest since: 1902	2003
Oct 1929–Sep 1931 24-Month	32.39" (822.71mm)	36.22" (919.99mm)	-3.83" (-97.28mm)	102nd Wettest	Wettest since: 1930	1942
Oct 1928–Sep 1931 36-Month	53.10" (1,348.74mm)	54.27" (1,378.46mm)	-1.17" (-29.72mm)	51st Driest	Driest since: 1926	1956
Oct 1928–Sep 1931 36-Month	53.10" (1,348.74mm)	54.27" (1,378.46mm)	-1.17" (-29.72mm)	75th Wettest	Wettest since: 1930	1997
Oct 1927–Sep 1931 48-Month	69.77" (1,772.16mm)	72.31" (1,836.67mm)	-2.54" (-64.51mm)	43rd Driest	Driest since: 1913	1956
Oct 1927–Sep 1931 48-Month	69.77" (1,772.16mm)	72.31" (1,836.67mm)	-2.54" (-64.51mm)	82nd Wettest	Wettest since: 1930	1998
Oct 1926–Sep 1931 60-Month	91.45" (2,322.83mm)	90.33" (2,294.38mm)	1.12" (28.45mm)	73rd Driest	Driest since: 1928	2022
Oct 1926–Sep 1931 60-Month	91.45" (2,322.83mm)	90.33" (2,294.38mm)	1.12" (28.45mm)	51st Wettest	Wettest since: 1930	1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published May 2023, retrieved on June 2, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings