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.

California

Precipitation Rankings, September 1899

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
September 1899
1-Month 		0.13"
(3.30mm)		 0.45"
(11.43mm)		 -0.32"
(-8.13mm)		 28th Driest
Driest since:
 1974
101st Wettest
Wettest since:
 1918
Aug–Sep 1899
2-Month 		0.35"
(8.89mm)		 0.69"
(17.53mm)		 -0.34"
(-8.64mm)		 36th Driest
Driest since:
 1937, 2018
93rd Wettest
Wettest since:
 1983
Ties: 1900, 1953, 2001
Jul–Sep 1899
3-Month 		0.41"
(10.41mm)		 0.87"
(22.10mm)		 -0.46"
(-11.69mm)		 26th Driest
Driest since:
 1928
103rd Wettest
Wettest since:
 1976
Ties: 1907, 1915
Jun–Sep 1899
4-Month 		0.90"
(22.86mm)		 1.22"
(30.99mm)		 -0.32"
(-8.13mm)		 45th Driest
Driest since:
 2002
84th Wettest
Wettest since:
 1982
May–Sep 1899
5-Month 		1.89"
(48.01mm)		 2.10"
(53.34mm)		 -0.21"
(-5.33mm)		 62nd Driest
Driest since:
 1924
67th Wettest
Wettest since:
 1998
Apr–Sep 1899
6-Month 		2.60"
(66.04mm)		 3.74"
(95.00mm)		 -1.14"
(-28.96mm)		 26th Driest
Driest since:
 1924
103rd Wettest
Wettest since:
 1896
Ties: 1919
Mar–Sep 1899
7-Month 		8.05"
(204.47mm)		 6.95"
(176.53mm)		 1.10"
(27.94mm)		 92nd Driest
Driest since:
 2008
37th Wettest
Wettest since:
 1995
Feb–Sep 1899
8-Month 		8.86"
(225.04mm)		 10.80"
(274.32mm)		 -1.94"
(-49.28mm)		 51st Driest
Driest since:
 2021
78th Wettest
Wettest since:
 1998
Jan–Sep 1899
9-Month 		13.63"
(346.20mm)		 15.05"
(382.27mm)		 -1.42"
(-36.07mm)		 61st Driest
Driest since:
 2022
68th Wettest
Wettest since:
 1998
Dec 1898–Sep 1899
10-Month 		15.02"
(381.51mm)		 18.67"
(474.22mm)		 -3.65"
(-92.71mm)		 43rd Driest
Driest since:
 1924
85th Wettest
Wettest since:
 1983
Ties: 1949
Nov 1898–Sep 1899
11-Month 		16.43"
(417.32mm)		 21.25"
(539.75mm)		 -4.82"
(-122.43mm)		 34th Driest
Driest since:
 1924
94th Wettest
Wettest since:
 1983
Oct 1898–Sep 1899
12-Month 		17.13"
(435.10mm)		 22.45"
(570.23mm)		 -5.32"
(-135.13mm)		 35th Driest
Driest since:
 1924
93rd Wettest
Wettest since:
 1983
Apr 1898–Sep 1899
18-Month 		20.76"
(527.30mm)		 26.19"
(665.23mm)		 -5.43"
(-137.93mm)		 37th Driest
Driest since:
 2021
91st Wettest
Wettest since:
 1983
Oct 1897–Sep 1899
24-Month 		32.29"
(820.17mm)		 44.90"
(1,140.46mm)		 -12.61"
(-320.29mm)		 10th Driest
Driest since:
 1977
117th Wettest
Wettest since:
 1983
Ties: 1960
Oct 1896–Sep 1899
36-Month 		57.46"
(1,459.48mm)		 67.32"
(1,709.93mm)		 -9.86"
(-250.45mm)		 30th Driest
Driest since:
 2022
96th Wettest
Wettest since:
 1984
Oct 1895–Sep 1899
48-Month 		82.19"
(2,087.63mm)		 89.51"
(2,273.55mm)		 -7.32"
(-185.92mm)		 47th Driest
Driest since:
 2015
78th Wettest
Wettest to Date
 1998

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