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 1990

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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 1990 1-Month	2.10" (53.34mm)	1.43" (36.32mm)	0.67" (17.02mm)	106th Driest	Driest since: 1989	1956
	2.10" (53.34mm)	1.43" (36.32mm)	0.67" (17.02mm)	23rd Wettest	Wettest since: 1985	2013
	Ties: 2002
Aug–Sep 1990 2-Month	3.86" (98.04mm)	3.46" (87.88mm)	0.40" (10.16mm)	92nd Driest	Driest since: 1989	1944
Aug–Sep 1990 2-Month	3.86" (98.04mm)	3.46" (87.88mm)	0.40" (10.16mm)	37th Wettest	Wettest since: 1986	2013
Jul–Sep 1990 3-Month	7.11" (180.59mm)	5.56" (141.22mm)	1.55" (39.37mm)	114th Driest	Driest since: 1989	1900
Jul–Sep 1990 3-Month	7.11" (180.59mm)	5.56" (141.22mm)	1.55" (39.37mm)	15th Wettest	Wettest since: 1982	2013
Jun–Sep 1990 4-Month	7.85" (199.39mm)	7.10" (180.34mm)	0.75" (19.05mm)	89th Driest	Driest since: 1989	1924
Jun–Sep 1990 4-Month	7.85" (199.39mm)	7.10" (180.34mm)	0.75" (19.05mm)	40th Wettest	Wettest since: 1986	1965
May–Sep 1990 5-Month	9.82" (249.43mm)	9.12" (231.65mm)	0.70" (17.78mm)	89th Driest	Driest since: 1989	1939
May–Sep 1990 5-Month	9.82" (249.43mm)	9.12" (231.65mm)	0.70" (17.78mm)	40th Wettest	Wettest since: 1986	1965
Apr–Sep 1990 6-Month	11.90" (302.26mm)	10.96" (278.38mm)	0.94" (23.88mm)	94th Driest	Driest since: 1989	1939
Apr–Sep 1990 6-Month	11.90" (302.26mm)	10.96" (278.38mm)	0.94" (23.88mm)	35th Wettest	Wettest since: 1986	1999
Mar–Sep 1990 7-Month	13.89" (352.81mm)	12.47" (316.74mm)	1.42" (36.07mm)	103rd Driest	Driest since: 1989	2002
Mar–Sep 1990 7-Month	13.89" (352.81mm)	12.47" (316.74mm)	1.42" (36.07mm)	26th Wettest	Wettest since: 1983	1941
Feb–Sep 1990 8-Month	14.97" (380.24mm)	13.56" (344.42mm)	1.41" (35.82mm)	103rd Driest	Driest since: 1989	2002
	14.97" (380.24mm)	13.56" (344.42mm)	1.41" (35.82mm)	26th Wettest	Wettest since: 1986	1941
	Ties: 1949
Jan–Sep 1990 9-Month	15.93" (404.62mm)	14.62" (371.35mm)	1.31" (33.27mm)	98th Driest	Driest since: 1989	2002
Jan–Sep 1990 9-Month	15.93" (404.62mm)	14.62" (371.35mm)	1.31" (33.27mm)	31st Wettest	Wettest since: 1983	1957
Dec 1989–Sep 1990 10-Month	16.64" (422.66mm)	15.70" (398.78mm)	0.94" (23.88mm)	93rd Driest	Driest since: 1989	2002
Dec 1989–Sep 1990 10-Month	16.64" (422.66mm)	15.70" (398.78mm)	0.94" (23.88mm)	35th Wettest	Wettest since: 1985	1957
Nov 1989–Sep 1990 11-Month	17.04" (432.82mm)	16.76" (425.70mm)	0.28" (7.12mm)	73rd Driest	Driest since: 1989	2002
Nov 1989–Sep 1990 11-Month	17.04" (432.82mm)	16.76" (425.70mm)	0.28" (7.12mm)	55th Wettest	Wettest since: 1987	1941
Oct 1989–Sep 1990 12-Month	17.83" (452.88mm)	18.10" (459.74mm)	-0.27" (-6.86mm)	66th Driest	Driest since: 1989	2002
Oct 1989–Sep 1990 12-Month	17.83" (452.88mm)	18.10" (459.74mm)	-0.27" (-6.86mm)	62nd Wettest	Wettest since: 1987	1995
Apr 1989–Sep 1990 18-Month	27.22" (691.39mm)	29.08" (738.63mm)	-1.86" (-47.24mm)	45th Driest	Driest since: 1989	2002
Apr 1989–Sep 1990 18-Month	27.22" (691.39mm)	29.08" (738.63mm)	-1.86" (-47.24mm)	83rd Wettest	Wettest since: 1988	1942
Oct 1988–Sep 1990 24-Month	33.42" (848.87mm)	36.22" (919.99mm)	-2.80" (-71.12mm)	35th Driest	Driest since: 1989	2003
Oct 1988–Sep 1990 24-Month	33.42" (848.87mm)	36.22" (919.99mm)	-2.80" (-71.12mm)	92nd Wettest	Wettest since: 1988	1942
Oct 1987–Sep 1990 36-Month	51.19" (1,300.23mm)	54.27" (1,378.46mm)	-3.08" (-78.23mm)	36th Driest	Driest since: 1979	1956
Oct 1987–Sep 1990 36-Month	51.19" (1,300.23mm)	54.27" (1,378.46mm)	-3.08" (-78.23mm)	90th Wettest	Wettest since: 1989	1997
Oct 1986–Sep 1990 48-Month	70.72" (1,796.29mm)	72.31" (1,836.67mm)	-1.59" (-40.38mm)	51st Driest	Driest since: 1980	1956
Oct 1986–Sep 1990 48-Month	70.72" (1,796.29mm)	72.31" (1,836.67mm)	-1.59" (-40.38mm)	74th Wettest	Wettest since: 1989	1998
Oct 1985–Sep 1990 60-Month	90.97" (2,310.64mm)	90.33" (2,294.38mm)	0.64" (16.26mm)	65th Driest	Driest since: 1981	2022
Oct 1985–Sep 1990 60-Month	90.97" (2,310.64mm)	90.33" (2,294.38mm)	0.64" (16.26mm)	59th Wettest	Wettest since: 1989	1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published May 2023, retrieved on June 4, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings