Statewide Rankings

Statewide Data Info
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, December 1999

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
December 1999
1-Month		0.73"
(18.54mm)		1.08"
(27.43mm)		-0.35"
(-8.89mm)		29th Driest
Driest since:
1976
100th Wettest
Wettest since:
1951
Ties: 1931
Nov–Dec 1999
2-Month		1.10"
(27.94mm)		2.15"
(54.61mm)		-1.05"
(-26.67mm)		12th Driest
Driest since:
1976
117th Wettest
Wettest since:
1983
Ties: 1912
Oct–Dec 1999
3-Month		1.67"
(42.42mm)		3.49"
(88.65mm)		-1.82"
(-46.23mm)		6th Driest
Driest since:
1976
123rd Wettest
Wettest since:
1972
Sep–Dec 1999
4-Month		3.06"
(77.72mm)		4.92"
(124.97mm)		-1.86"
(-47.25mm)		9th Driest
Driest since:
1901
120th Wettest
Wettest since:
1941
Ties: 1980
Aug–Dec 1999
5-Month		6.33"
(160.78mm)		6.95"
(176.53mm)		-0.62"
(-15.75mm)		51st Driest
Driest since:
1900
78th Wettest
Wettest since:
1941
Jul–Dec 1999
6-Month		8.92"
(226.57mm)		9.05"
(229.87mm)		-0.13"
(-3.30mm)		60th Driest
Driest since:
1900
69th Wettest
Wettest since:
2006
Jun–Dec 1999
7-Month		10.56"
(268.22mm)		10.59"
(268.99mm)		-0.03"
(-0.77mm)		64th Driest
Driest since:
1939
65th Wettest
Wettest since:
1965
Ties: 1949
May–Dec 1999
8-Month		13.20"
(335.28mm)		12.61"
(320.29mm)		0.59"
(14.99mm)		79th Driest
Driest since:
1939
50th Wettest
Wettest since:
1941
Apr–Dec 1999
9-Month		17.58"
(446.53mm)		14.45"
(367.03mm)		3.13"
(79.50mm)		119th Driest
Driest since:
1939
10th Wettest
Wettest since:
1941
Mar–Dec 1999
10-Month		18.30"
(464.82mm)		15.97"
(405.64mm)		2.33"
(59.18mm)		109th Driest
Driest since:
1939
20th Wettest
Wettest since:
1941
Feb–Dec 1999
11-Month		18.96"
(481.58mm)		17.06"
(433.32mm)		1.90"
(48.26mm)		106th Driest
Driest since:
1939
23rd Wettest
Wettest since:
1941
Jan–Dec 1999
12-Month		20.03"
(508.76mm)		18.12"
(460.25mm)		1.91"
(48.51mm)		105th Driest
Driest since:
2002
24th Wettest
Wettest since:
1941
Jul 1998–Dec 1999
18-Month		31.03"
(788.16mm)		27.13"
(689.10mm)		3.90"
(99.06mm)		114th Driest
Driest since:
2020
14th Wettest
Wettest since:
1941
Jan 1998–Dec 1999
24-Month		38.80"
(985.52mm)		36.21"
(919.73mm)		2.59"
(65.79mm)		102nd Driest
Driest since:
2003
26th Wettest
Wettest since:
1942
Jan 1997–Dec 1999
36-Month		61.04"
(1,550.42mm)		54.27"
(1,378.46mm)		6.77"
(171.96mm)		119th Driest
Driest since:
1956
8th Wettest
Wettest since:
1942
Jan 1996–Dec 1999
48-Month		80.89"
(2,054.61mm)		72.31"
(1,836.67mm)		8.58"
(217.94mm)		120th Driest
Driest since:
1956
6th Wettest
Wettest since:
1985
Jan 1995–Dec 1999
60-Month		102.68"
(2,608.07mm)		90.35"
(2,294.89mm)		12.33"
(313.18mm)		124th Driest
Driest since:
1956
1st Wettest
Wettest to Date
1999

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