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.

Wyoming

Precipitation Rankings, December 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
December 1990 1-Month	0.82" (20.83mm)	1.01" (25.65mm)	-0.19" (-4.82mm)	46th Driest	Driest since: 1988	1986
	0.82" (20.83mm)	1.01" (25.65mm)	-0.19" (-4.82mm)	83rd Wettest	Wettest since: 1989	1964, 1996
	Ties: 1965, 1969, 2009
Nov–Dec 1990 2-Month	2.05" (52.07mm)	2.05" (52.07mm)	0.00" (0.00mm)	68th Driest	Driest since: 1989	1914
	2.05" (52.07mm)	2.05" (52.07mm)	0.00" (0.00mm)	61st Wettest	Wettest since: 1988	1983
	Ties: 1998
Oct–Dec 1990 3-Month	3.19" (81.03mm)	3.24" (82.30mm)	-0.05" (-1.27mm)	62nd Driest	Driest since: 1989	1976
	3.19" (81.03mm)	3.24" (82.30mm)	-0.05" (-1.27mm)	67th Wettest	Wettest since: 1986	1942
	Ties: 1899
Sep–Dec 1990 4-Month	4.24" (107.70mm)	4.48" (113.79mm)	-0.24" (-6.09mm)	56th Driest	Driest since: 1988	1952
Sep–Dec 1990 4-Month	4.24" (107.70mm)	4.48" (113.79mm)	-0.24" (-6.09mm)	73rd Wettest	Wettest since: 1989	2013
Aug–Dec 1990 5-Month	5.36" (136.14mm)	5.55" (140.97mm)	-0.19" (-4.83mm)	59th Driest	Driest since: 1988	1904
	5.36" (136.14mm)	5.55" (140.97mm)	-0.19" (-4.83mm)	70th Wettest	Wettest since: 1989	1923
	Ties: 1897
Jul–Dec 1990 6-Month	7.26" (184.40mm)	6.83" (173.48mm)	0.43" (10.92mm)	83rd Driest	Driest since: 1989	1939
Jul–Dec 1990 6-Month	7.26" (184.40mm)	6.83" (173.48mm)	0.43" (10.92mm)	46th Wettest	Wettest since: 1986	1923
Jun–Dec 1990 7-Month	8.45" (214.63mm)	8.67" (220.22mm)	-0.22" (-5.59mm)	65th Driest	Driest since: 1989	1935
Jun–Dec 1990 7-Month	8.45" (214.63mm)	8.67" (220.22mm)	-0.22" (-5.59mm)	64th Wettest	Wettest since: 1986	1923
May–Dec 1990 8-Month	10.22" (259.59mm)	10.88" (276.35mm)	-0.66" (-16.76mm)	47th Driest	Driest since: 1988	1900
May–Dec 1990 8-Month	10.22" (259.59mm)	10.88" (276.35mm)	-0.66" (-16.76mm)	82nd Wettest	Wettest since: 1989	1923
Apr–Dec 1990 9-Month	12.27" (311.66mm)	12.66" (321.56mm)	-0.39" (-9.90mm)	55th Driest	Driest since: 1989	1954
Apr–Dec 1990 9-Month	12.27" (311.66mm)	12.66" (321.56mm)	-0.39" (-9.90mm)	74th Wettest	Wettest since: 1986	1941
Mar–Dec 1990 10-Month	13.71" (348.23mm)	13.91" (353.31mm)	-0.20" (-5.08mm)	61st Driest	Driest since: 1989	2012
Mar–Dec 1990 10-Month	13.71" (348.23mm)	13.91" (353.31mm)	-0.20" (-5.08mm)	68th Wettest	Wettest since: 1986	1941
Feb–Dec 1990 11-Month	14.40" (365.76mm)	14.88" (377.95mm)	-0.48" (-12.19mm)	53rd Driest	Driest since: 1989	2012
Feb–Dec 1990 11-Month	14.40" (365.76mm)	14.88" (377.95mm)	-0.48" (-12.19mm)	76th Wettest	Wettest since: 1986	1941
Jan–Dec 1990 12-Month	15.38" (390.65mm)	15.94" (404.88mm)	-0.56" (-14.23mm)	53rd Driest	Driest since: 1989	2012
Jan–Dec 1990 12-Month	15.38" (390.65mm)	15.94" (404.88mm)	-0.56" (-14.23mm)	76th Wettest	Wettest since: 1986	1927
Jul 1989–Dec 1990 18-Month	22.01" (559.05mm)	22.77" (578.36mm)	-0.76" (-19.31mm)	57th Driest	Driest since: 1989	1934
Jul 1989–Dec 1990 18-Month	22.01" (559.05mm)	22.77" (578.36mm)	-0.76" (-19.31mm)	71st Wettest	Wettest since: 1987	1927
Jan 1989–Dec 1990 24-Month	30.40" (772.16mm)	31.87" (809.50mm)	-1.47" (-37.34mm)	46th Driest	Driest since: 1989	2002
Jan 1989–Dec 1990 24-Month	30.40" (772.16mm)	31.87" (809.50mm)	-1.47" (-37.34mm)	82nd Wettest	Wettest since: 1987	1983
Jan 1988–Dec 1990 36-Month	41.82" (1,062.23mm)	47.82" (1,214.63mm)	-6.00" (-152.40mm)	15th Driest	Driest since: 1989	2002
Jan 1988–Dec 1990 36-Month	41.82" (1,062.23mm)	47.82" (1,214.63mm)	-6.00" (-152.40mm)	112th Wettest	Wettest since: 1988	1947
Jan 1987–Dec 1990 48-Month	56.68" (1,439.67mm)	63.72" (1,618.49mm)	-7.04" (-178.82mm)	12th Driest	Driest since: 1962	2003
	56.68" (1,439.67mm)	63.72" (1,618.49mm)	-7.04" (-178.82mm)	114th Wettest	Wettest since: 1989	1998
	Ties: 1962
Jan 1986–Dec 1990 60-Month	74.59" (1,894.59mm)	79.58" (2,021.33mm)	-4.99" (-126.74mm)	29th Driest	Driest since: 1989	1935
Jan 1986–Dec 1990 60-Month	74.59" (1,894.59mm)	79.58" (2,021.33mm)	-4.99" (-126.74mm)	96th Wettest	Wettest since: 1987	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