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, May 2015

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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
May 2015 1-Month	5.30" (134.62mm)	2.02" (51.31mm)	3.28" (83.31mm)	128th Driest	Driest since: 2014	1974
May 2015 1-Month	5.30" (134.62mm)	2.02" (51.31mm)	3.28" (83.31mm)	1st Wettest	Wettest to Date	2015
Apr–May 2015 2-Month	7.18" (182.37mm)	3.86" (98.04mm)	3.32" (84.33mm)	126th Driest	Driest since: 2014	2002
Apr–May 2015 2-Month	7.18" (182.37mm)	3.86" (98.04mm)	3.32" (84.33mm)	3rd Wettest	Wettest since: 1995	1957
Mar–May 2015 3-Month	8.04" (204.22mm)	5.37" (136.40mm)	2.67" (67.82mm)	123rd Driest	Driest since: 2014	2002
Mar–May 2015 3-Month	8.04" (204.22mm)	5.37" (136.40mm)	2.67" (67.82mm)	6th Wettest	Wettest since: 1995	1957
Feb–May 2015 4-Month	9.39" (238.51mm)	6.46" (164.08mm)	2.93" (74.43mm)	123rd Driest	Driest since: 2014	2002
Feb–May 2015 4-Month	9.39" (238.51mm)	6.46" (164.08mm)	2.93" (74.43mm)	6th Wettest	Wettest since: 1995	1905
Jan–May 2015 5-Month	10.04" (255.02mm)	7.52" (191.01mm)	2.52" (64.01mm)	121st Driest	Driest since: 2014	2002
Jan–May 2015 5-Month	10.04" (255.02mm)	7.52" (191.01mm)	2.52" (64.01mm)	8th Wettest	Wettest since: 1995	1957
Dec 2014–May 2015 6-Month	11.35" (288.29mm)	8.60" (218.44mm)	2.75" (69.85mm)	119th Driest	Driest since: 2014	2002
Dec 2014–May 2015 6-Month	11.35" (288.29mm)	8.60" (218.44mm)	2.75" (69.85mm)	9th Wettest	Wettest since: 1995	1957
Nov 2014–May 2015 7-Month	12.47" (316.74mm)	9.66" (245.36mm)	2.81" (71.38mm)	119th Driest	Driest since: 2014	2002
Nov 2014–May 2015 7-Month	12.47" (316.74mm)	9.66" (245.36mm)	2.81" (71.38mm)	9th Wettest	Wettest since: 1995	1957
Oct 2014–May 2015 8-Month	13.55" (344.17mm)	11.00" (279.40mm)	2.55" (64.77mm)	115th Driest	Driest since: 2014	2002
Oct 2014–May 2015 8-Month	13.55" (344.17mm)	11.00" (279.40mm)	2.55" (64.77mm)	13th Wettest	Wettest since: 1999	1995
Sep 2014–May 2015 9-Month	15.63" (397.00mm)	12.43" (315.72mm)	3.20" (81.28mm)	120th Driest	Driest since: 2014	2002
Sep 2014–May 2015 9-Month	15.63" (397.00mm)	12.43" (315.72mm)	3.20" (81.28mm)	8th Wettest	Wettest since: 1995	1942
Aug 2014–May 2015 10-Month	18.22" (462.79mm)	14.44" (366.78mm)	3.78" (96.01mm)	124th Driest	Driest since: 2014	2002
Aug 2014–May 2015 10-Month	18.22" (462.79mm)	14.44" (366.78mm)	3.78" (96.01mm)	4th Wettest	Wettest since: 1995	1942
Jul 2014–May 2015 11-Month	20.98" (532.89mm)	16.54" (420.12mm)	4.44" (112.77mm)	125th Driest	Driest since: 2014	2002
Jul 2014–May 2015 11-Month	20.98" (532.89mm)	16.54" (420.12mm)	4.44" (112.77mm)	3rd Wettest	Wettest since: 1942	1942
Jun 2014–May 2015 12-Month	22.17" (563.12mm)	18.08" (459.23mm)	4.09" (103.89mm)	124th Driest	Driest since: 2014	2002
Jun 2014–May 2015 12-Month	22.17" (563.12mm)	18.08" (459.23mm)	4.09" (103.89mm)	4th Wettest	Wettest since: 1942	1942
Dec 2013–May 2015 18-Month	30.00" (762.00mm)	26.70" (678.18mm)	3.30" (83.82mm)	114th Driest	Driest since: 2014	2013
Dec 2013–May 2015 18-Month	30.00" (762.00mm)	26.70" (678.18mm)	3.30" (83.82mm)	13th Wettest	Wettest since: 1998	1942
Jun 2013–May 2015 24-Month	41.88" (1,063.75mm)	36.18" (918.97mm)	5.70" (144.78mm)	121st Driest	Driest since: 2014	1902
Jun 2013–May 2015 24-Month	41.88" (1,063.75mm)	36.18" (918.97mm)	5.70" (144.78mm)	6th Wettest	Wettest since: 1999	1942
Jun 2012–May 2015 36-Month	55.49" (1,409.45mm)	54.21" (1,376.93mm)	1.28" (32.52mm)	83rd Driest	Driest since: 2014	2022
	55.49" (1,409.45mm)	54.21" (1,376.93mm)	1.28" (32.52mm)	43rd Wettest	Wettest since: 2009	1943
	Ties: 1909
Jun 2011–May 2015 48-Month	70.19" (1,782.83mm)	72.23" (1,834.64mm)	-2.04" (-51.81mm)	45th Driest	Driest since: 2014	1956
Jun 2011–May 2015 48-Month	70.19" (1,782.83mm)	72.23" (1,834.64mm)	-2.04" (-51.81mm)	80th Wettest	Wettest since: 2011	1944
Jun 2010–May 2015 60-Month	88.79" (2,255.27mm)	90.24" (2,292.10mm)	-1.45" (-36.83mm)	49th Driest	Driest since: 2014	2022
Jun 2010–May 2015 60-Month	88.79" (2,255.27mm)	90.24" (2,292.10mm)	-1.45" (-36.83mm)	75th Wettest	Wettest since: 2011	1987

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published January 2023, retrieved on February 1, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings