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, April 1978

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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
April 1978 1-Month	1.47" (37.34mm)	1.84" (46.74mm)	-0.37" (-9.40mm)	50th Driest	Driest since: 1974	2002
	1.47" (37.34mm)	1.84" (46.74mm)	-0.37" (-9.40mm)	79th Wettest	Wettest since: 1977	1900
	Ties: 1924
Mar–Apr 1978 2-Month	3.14" (79.76mm)	3.35" (85.09mm)	-0.21" (-5.33mm)	58th Driest	Driest since: 1977	2002
Mar–Apr 1978 2-Month	3.14" (79.76mm)	3.35" (85.09mm)	-0.21" (-5.33mm)	71st Wettest	Wettest since: 1975	1906
Feb–Apr 1978 3-Month	4.21" (106.93mm)	4.44" (112.78mm)	-0.23" (-5.85mm)	61st Driest	Driest since: 1977	2002
	4.21" (106.93mm)	4.44" (112.78mm)	-0.23" (-5.85mm)	68th Wettest	Wettest since: 1975	1905
	Ties: 1917, 2001
Jan–Apr 1978 4-Month	5.69" (144.53mm)	5.51" (139.95mm)	0.18" (4.58mm)	80th Driest	Driest since: 1977	2002
	5.69" (144.53mm)	5.51" (139.95mm)	0.18" (4.58mm)	49th Wettest	Wettest since: 1975	1905
	Ties: 2003
Dec 1977–Apr 1978 5-Month	6.66" (169.16mm)	6.58" (167.13mm)	0.08" (2.03mm)	73rd Driest	Driest since: 1977	2002
Dec 1977–Apr 1978 5-Month	6.66" (169.16mm)	6.58" (167.13mm)	0.08" (2.03mm)	55th Wettest	Wettest since: 1975	1905
Nov 1977–Apr 1978 6-Month	7.91" (200.91mm)	7.65" (194.31mm)	0.26" (6.60mm)	79th Driest	Driest since: 1977	1904
Nov 1977–Apr 1978 6-Month	7.91" (200.91mm)	7.65" (194.31mm)	0.26" (6.60mm)	49th Wettest	Wettest since: 1974	1984
Oct 1977–Apr 1978 7-Month	8.63" (219.20mm)	8.98" (228.09mm)	-0.35" (-8.89mm)	57th Driest	Driest since: 1977	2002
Oct 1977–Apr 1978 7-Month	8.63" (219.20mm)	8.98" (228.09mm)	-0.35" (-8.89mm)	71st Wettest	Wettest since: 1975	1942
Sep 1977–Apr 1978 8-Month	9.47" (240.54mm)	10.41" (264.41mm)	-0.94" (-23.87mm)	45th Driest	Driest since: 1977	1902, 2002
Sep 1977–Apr 1978 8-Month	9.47" (240.54mm)	10.41" (264.41mm)	-0.94" (-23.87mm)	83rd Wettest	Wettest since: 1975	1942
Aug 1977–Apr 1978 9-Month	11.82" (300.23mm)	12.42" (315.47mm)	-0.60" (-15.24mm)	52nd Driest	Driest since: 1977	2002
	11.82" (300.23mm)	12.42" (315.47mm)	-0.60" (-15.24mm)	76th Wettest	Wettest since: 1973	1942
	Ties: 1929
Jul 1977–Apr 1978 10-Month	14.71" (373.63mm)	14.52" (368.81mm)	0.19" (4.82mm)	67th Driest	Driest since: 1977	1902
	14.71" (373.63mm)	14.52" (368.81mm)	0.19" (4.82mm)	61st Wettest	Wettest since: 1973	1942
	Ties: 1971
Jun 1977–Apr 1978 11-Month	15.63" (397.00mm)	16.07" (408.18mm)	-0.44" (-11.18mm)	51st Driest	Driest since: 1977	1981
Jun 1977–Apr 1978 11-Month	15.63" (397.00mm)	16.07" (408.18mm)	-0.44" (-11.18mm)	77th Wettest	Wettest since: 1974	1942
May 1977–Apr 1978 12-Month	17.44" (442.98mm)	18.08" (459.23mm)	-0.64" (-16.25mm)	50th Driest	Driest since: 1977	2013
	17.44" (442.98mm)	18.08" (459.23mm)	-0.64" (-16.25mm)	78th Wettest	Wettest since: 1974	1942
	Ties: 1971
Nov 1976–Apr 1978 18-Month	22.03" (559.56mm)	25.76" (654.30mm)	-3.73" (-94.74mm)	17th Driest	Driest since: 1977	2013
Nov 1976–Apr 1978 18-Month	22.03" (559.56mm)	25.76" (654.30mm)	-3.73" (-94.74mm)	110th Wettest	Wettest since: 1976	1942
May 1976–Apr 1978 24-Month	31.41" (797.81mm)	36.16" (918.46mm)	-4.75" (-120.65mm)	16th Driest	Driest since: 1977	1902
May 1976–Apr 1978 24-Month	31.41" (797.81mm)	36.16" (918.46mm)	-4.75" (-120.65mm)	111th Wettest	Wettest since: 1975	1942
May 1975–Apr 1978 36-Month	46.80" (1,188.72mm)	54.22" (1,377.19mm)	-7.42" (-188.47mm)	14th Driest	Driest since: 1977	1955
May 1975–Apr 1978 36-Month	46.80" (1,188.72mm)	54.22" (1,377.19mm)	-7.42" (-188.47mm)	112th Wettest	Wettest since: 1976	1985
May 1974–Apr 1978 48-Month	61.87" (1,571.50mm)	72.24" (1,834.90mm)	-10.37" (-263.40mm)	5th Driest	Driest since: 1956	1904
May 1974–Apr 1978 48-Month	61.87" (1,571.50mm)	72.24" (1,834.90mm)	-10.37" (-263.40mm)	120th Wettest	Wettest since: 1977	1986
May 1973–Apr 1978 60-Month	80.18" (2,036.57mm)	90.24" (2,292.10mm)	-10.06" (-255.53mm)	7th Driest	Driest since: 1957	1957
May 1973–Apr 1978 60-Month	80.18" (2,036.57mm)	90.24" (2,292.10mm)	-10.06" (-255.53mm)	117th Wettest	Wettest since: 1977	1987

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2023, retrieved on March 27, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings