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, September 1987

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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 1987 1-Month	0.63" (16.00mm)	1.24" (31.50mm)	-0.61" (-15.50mm)	24th Driest	Driest since: 1979	1979
	0.63" (16.00mm)	1.24" (31.50mm)	-0.61" (-15.50mm)	105th Wettest	Wettest since: 1986	1923
	Ties: 2009
Aug–Sep 1987 2-Month	2.02" (51.31mm)	2.31" (58.67mm)	-0.29" (-7.36mm)	56th Driest	Driest since: 1981	2012
Aug–Sep 1987 2-Month	2.02" (51.31mm)	2.31" (58.67mm)	-0.29" (-7.36mm)	73rd Wettest	Wettest since: 1986	1923
Jul–Sep 1987 3-Month	3.99" (101.35mm)	3.59" (91.19mm)	0.40" (10.16mm)	91st Driest	Driest since: 1985	1964
Jul–Sep 1987 3-Month	3.99" (101.35mm)	3.59" (91.19mm)	0.40" (10.16mm)	38th Wettest	Wettest since: 1986	1923
Jun–Sep 1987 4-Month	5.51" (139.95mm)	5.43" (137.92mm)	0.08" (2.03mm)	74th Driest	Driest since: 1985	2012
Jun–Sep 1987 4-Month	5.51" (139.95mm)	5.43" (137.92mm)	0.08" (2.03mm)	55th Wettest	Wettest since: 1986	1923
May–Sep 1987 5-Month	8.37" (212.60mm)	7.64" (194.06mm)	0.73" (18.54mm)	90th Driest	Driest since: 1986	1919
May–Sep 1987 5-Month	8.37" (212.60mm)	7.64" (194.06mm)	0.73" (18.54mm)	39th Wettest	Wettest since: 1982	1915
Apr–Sep 1987 6-Month	8.87" (225.30mm)	9.42" (239.27mm)	-0.55" (-13.97mm)	54th Driest	Driest since: 1985	2012
Apr–Sep 1987 6-Month	8.87" (225.30mm)	9.42" (239.27mm)	-0.55" (-13.97mm)	75th Wettest	Wettest since: 1986	1941
Mar–Sep 1987 7-Month	10.14" (257.56mm)	10.67" (271.02mm)	-0.53" (-13.46mm)	52nd Driest	Driest since: 1985	2012
Mar–Sep 1987 7-Month	10.14" (257.56mm)	10.67" (271.02mm)	-0.53" (-13.46mm)	77th Wettest	Wettest since: 1986	1941
Feb–Sep 1987 8-Month	11.20" (284.48mm)	11.63" (295.40mm)	-0.43" (-10.92mm)	54th Driest	Driest since: 1985	2012
Feb–Sep 1987 8-Month	11.20" (284.48mm)	11.63" (295.40mm)	-0.43" (-10.92mm)	75th Wettest	Wettest since: 1986	1945
Jan–Sep 1987 9-Month	12.10" (307.34mm)	12.70" (322.58mm)	-0.60" (-15.24mm)	50th Driest	Driest since: 1985	1919
Jan–Sep 1987 9-Month	12.10" (307.34mm)	12.70" (322.58mm)	-0.60" (-15.24mm)	79th Wettest	Wettest since: 1986	1915, 1945
Dec 1986–Sep 1987 10-Month	12.32" (312.93mm)	13.71" (348.23mm)	-1.39" (-35.30mm)	36th Driest	Driest since: 1985	1919
Dec 1986–Sep 1987 10-Month	12.32" (312.93mm)	13.71" (348.23mm)	-1.39" (-35.30mm)	92nd Wettest	Wettest since: 1986	1923
Nov 1986–Sep 1987 11-Month	13.73" (348.74mm)	14.74" (374.40mm)	-1.01" (-25.66mm)	44th Driest	Driest since: 1985	1919
Nov 1986–Sep 1987 11-Month	13.73" (348.74mm)	14.74" (374.40mm)	-1.01" (-25.66mm)	84th Wettest	Wettest since: 1986	1923
Oct 1986–Sep 1987 12-Month	15.52" (394.21mm)	15.94" (404.88mm)	-0.42" (-10.67mm)	57th Driest	Driest since: 1985	1919
Oct 1986–Sep 1987 12-Month	15.52" (394.21mm)	15.94" (404.88mm)	-0.42" (-10.67mm)	71st Wettest	Wettest since: 1986	1995
Apr 1986–Sep 1987 18-Month	25.95" (659.13mm)	25.35" (643.89mm)	0.60" (15.24mm)	71st Driest	Driest since: 1985	2021
Apr 1986–Sep 1987 18-Month	25.95" (659.13mm)	25.35" (643.89mm)	0.60" (15.24mm)	57th Wettest	Wettest since: 1986	1945
Oct 1985–Sep 1987 24-Month	33.88" (860.55mm)	31.88" (809.75mm)	2.00" (50.80mm)	90th Driest	Driest since: 1986	2002
Oct 1985–Sep 1987 24-Month	33.88" (860.55mm)	31.88" (809.75mm)	2.00" (50.80mm)	37th Wettest	Wettest since: 1984	1998
Oct 1984–Sep 1987 36-Month	46.97" (1,193.04mm)	47.81" (1,214.37mm)	-0.84" (-21.33mm)	54th Driest	Driest since: 1981	2002
	46.97" (1,193.04mm)	47.81" (1,214.37mm)	-0.84" (-21.33mm)	72nd Wettest	Wettest since: 1986	1997
	Ties: 1970
Oct 1983–Sep 1987 48-Month	65.24" (1,657.10mm)	63.72" (1,618.49mm)	1.52" (38.61mm)	79th Driest	Driest since: 1982	2003
Oct 1983–Sep 1987 48-Month	65.24" (1,657.10mm)	63.72" (1,618.49mm)	1.52" (38.61mm)	46th Wettest	Wettest since: 1986	1998
Oct 1982–Sep 1987 60-Month	82.38" (2,092.45mm)	79.56" (2,020.82mm)	2.82" (71.63mm)	87th Driest	Driest since: 1983	2004
Oct 1982–Sep 1987 60-Month	82.38" (2,092.45mm)	79.56" (2,020.82mm)	2.82" (71.63mm)	37th Wettest	Wettest since: 1986	1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published May 2023, retrieved on June 5, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings