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 1998

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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 1998 1-Month	0.89" (22.61mm)	1.43" (36.32mm)	-0.54" (-13.71mm)	34th Driest	Driest since: 1992	1956
September 1998 1-Month	0.89" (22.61mm)	1.43" (36.32mm)	-0.54" (-13.71mm)	95th Wettest	Wettest since: 1997	2013
Aug–Sep 1998 2-Month	2.74" (69.60mm)	3.46" (87.88mm)	-0.72" (-18.28mm)	31st Driest	Driest since: 1983	1944
Aug–Sep 1998 2-Month	2.74" (69.60mm)	3.46" (87.88mm)	-0.72" (-18.28mm)	98th Wettest	Wettest since: 1997	2013
Jul–Sep 1998 3-Month	6.53" (165.86mm)	5.56" (141.22mm)	0.97" (24.64mm)	108th Driest	Driest since: 1996	1900
Jul–Sep 1998 3-Month	6.53" (165.86mm)	5.56" (141.22mm)	0.97" (24.64mm)	21st Wettest	Wettest since: 1997	2013
Jun–Sep 1998 4-Month	7.74" (196.60mm)	7.10" (180.34mm)	0.64" (16.26mm)	88th Driest	Driest since: 1994	1924
Jun–Sep 1998 4-Month	7.74" (196.60mm)	7.10" (180.34mm)	0.64" (16.26mm)	41st Wettest	Wettest since: 1997	1965
May–Sep 1998 5-Month	8.80" (223.52mm)	9.12" (231.65mm)	-0.32" (-8.13mm)	56th Driest	Driest since: 1994	1939
	8.80" (223.52mm)	9.12" (231.65mm)	-0.32" (-8.13mm)	73rd Wettest	Wettest since: 1997	1965
	Ties: 1955, 1970
Apr–Sep 1998 6-Month	10.57" (268.48mm)	10.96" (278.38mm)	-0.39" (-9.90mm)	63rd Driest	Driest since: 1994	1939
Apr–Sep 1998 6-Month	10.57" (268.48mm)	10.96" (278.38mm)	-0.39" (-9.90mm)	66th Wettest	Wettest since: 1997	1999
Mar–Sep 1998 7-Month	12.42" (315.47mm)	12.47" (316.74mm)	-0.05" (-1.27mm)	72nd Driest	Driest since: 1994	2002
Mar–Sep 1998 7-Month	12.42" (315.47mm)	12.47" (316.74mm)	-0.05" (-1.27mm)	57th Wettest	Wettest since: 1997	1941
Feb–Sep 1998 8-Month	13.50" (342.90mm)	13.56" (344.42mm)	-0.06" (-1.52mm)	69th Driest	Driest since: 1994	2002
Feb–Sep 1998 8-Month	13.50" (342.90mm)	13.56" (344.42mm)	-0.06" (-1.52mm)	60th Wettest	Wettest since: 1997	1941
Jan–Sep 1998 9-Month	14.30" (363.22mm)	14.62" (371.35mm)	-0.32" (-8.13mm)	63rd Driest	Driest since: 1994	2002
Jan–Sep 1998 9-Month	14.30" (363.22mm)	14.62" (371.35mm)	-0.32" (-8.13mm)	66th Wettest	Wettest since: 1997	1957
Dec 1997–Sep 1998 10-Month	15.16" (385.06mm)	15.70" (398.78mm)	-0.54" (-13.72mm)	55th Driest	Driest since: 1994	2002
Dec 1997–Sep 1998 10-Month	15.16" (385.06mm)	15.70" (398.78mm)	-0.54" (-13.72mm)	73rd Wettest	Wettest since: 1997	1957
Nov 1997–Sep 1998 11-Month	16.39" (416.31mm)	16.76" (425.70mm)	-0.37" (-9.39mm)	64th Driest	Driest since: 1994	2002
Nov 1997–Sep 1998 11-Month	16.39" (416.31mm)	16.76" (425.70mm)	-0.37" (-9.39mm)	64th Wettest	Wettest since: 1997	1941
Oct 1997–Sep 1998 12-Month	18.64" (473.46mm)	18.10" (459.74mm)	0.54" (13.72mm)	76th Driest	Driest since: 1996	2002
Oct 1997–Sep 1998 12-Month	18.64" (473.46mm)	18.10" (459.74mm)	0.54" (13.72mm)	52nd Wettest	Wettest since: 1997	1995
Apr 1997–Sep 1998 18-Month	33.23" (844.04mm)	29.08" (738.63mm)	4.15" (105.41mm)	120th Driest	Driest since: 1996	2002
Apr 1997–Sep 1998 18-Month	33.23" (844.04mm)	29.08" (738.63mm)	4.15" (105.41mm)	8th Wettest	Wettest since: 1997	1942
Oct 1996–Sep 1998 24-Month	40.80" (1,036.32mm)	36.22" (919.99mm)	4.58" (116.33mm)	117th Driest	Driest since: 1997	2003
Oct 1996–Sep 1998 24-Month	40.80" (1,036.32mm)	36.22" (919.99mm)	4.58" (116.33mm)	10th Wettest	Wettest since: 1996	1942
Oct 1995–Sep 1998 36-Month	58.51" (1,486.15mm)	54.27" (1,378.46mm)	4.24" (107.69mm)	108th Driest	Driest since: 1996	1956
Oct 1995–Sep 1998 36-Month	58.51" (1,486.15mm)	54.27" (1,378.46mm)	4.24" (107.69mm)	18th Wettest	Wettest since: 1997	1997
Oct 1994–Sep 1998 48-Month	82.49" (2,095.25mm)	72.31" (1,836.67mm)	10.18" (258.58mm)	124th Driest	Driest since: 1997	1956
Oct 1994–Sep 1998 48-Month	82.49" (2,095.25mm)	72.31" (1,836.67mm)	10.18" (258.58mm)	1st Wettest	Wettest to Date	1998
Oct 1993–Sep 1998 60-Month	99.27" (2,521.46mm)	90.33" (2,294.38mm)	8.94" (227.08mm)	117th Driest	Driest since: 1996	2022
Oct 1993–Sep 1998 60-Month	99.27" (2,521.46mm)	90.33" (2,294.38mm)	8.94" (227.08mm)	7th Wettest	Wettest since: 1997	1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2023, retrieved on March 26, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings