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 1918

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
September 1918
1-Month 		1.55"
(39.37mm)		 0.45"
(11.43mm)		 1.10"
(27.94mm)		 128th Driest
Driest since:
 1974
1st Wettest
Wettest to Date
 1918
Aug–Sep 1918
2-Month 		1.82"
(46.23mm)		 0.69"
(17.53mm)		 1.13"
(28.70mm)		 126th Driest
Driest since:
 1937, 2018
3rd Wettest
Wettest since:
 1983
Ties: 1904
Jul–Sep 1918
3-Month 		2.06"
(52.32mm)		 0.87"
(22.10mm)		 1.19"
(30.22mm)		 126th Driest
Driest since:
 1928
3rd Wettest
Wettest since:
 1976
Ties: 1904
Jun–Sep 1918
4-Month 		2.18"
(55.37mm)		 1.22"
(30.99mm)		 0.96"
(24.38mm)		 124th Driest
Driest since:
 2002
5th Wettest
Wettest to Date
 1982
May–Sep 1918
5-Month 		2.53"
(64.26mm)		 2.10"
(53.34mm)		 0.43"
(10.92mm)		 92nd Driest
Driest since:
 1924
37th Wettest
Wettest since:
 1998
Apr–Sep 1918
6-Month 		3.14"
(79.76mm)		 3.74"
(95.00mm)		 -0.60"
(-15.24mm)		 46th Driest
Driest since:
 1924
83rd Wettest
Wettest since:
 1896
Ties: 1907, 2013
Mar–Sep 1918
7-Month 		8.47"
(215.14mm)		 6.95"
(176.53mm)		 1.52"
(38.61mm)		 100th Driest
Driest since:
 2008
29th Wettest
Wettest since:
 1995
Feb–Sep 1918
8-Month 		13.67"
(347.22mm)		 10.80"
(274.32mm)		 2.87"
(72.90mm)		 105th Driest
Driest since:
 2021
24th Wettest
Wettest since:
 1998
Ties: 1980
Jan–Sep 1918
9-Month 		14.73"
(374.14mm)		 15.05"
(382.27mm)		 -0.32"
(-8.13mm)		 75th Driest
Driest since:
 2022
54th Wettest
Wettest since:
 1998
Dec 1917–Sep 1918
10-Month 		15.92"
(404.37mm)		 18.67"
(474.22mm)		 -2.75"
(-69.85mm)		 52nd Driest
Driest since:
 1924
76th Wettest
Wettest since:
 1983
Nov 1917–Sep 1918
11-Month 		17.48"
(443.99mm)		 21.25"
(539.75mm)		 -3.77"
(-95.76mm)		 50th Driest
Driest since:
 1924
78th Wettest
Wettest since:
 1983
Oct 1917–Sep 1918
12-Month 		17.49"
(444.25mm)		 22.45"
(570.23mm)		 -4.96"
(-125.98mm)		 40th Driest
Driest since:
 1924
88th Wettest
Wettest since:
 1983
Apr 1917–Sep 1918
18-Month 		20.49"
(520.45mm)		 26.19"
(665.23mm)		 -5.70"
(-144.78mm)		 33rd Driest
Driest since:
 2021
95th Wettest
Wettest since:
 1983
Oct 1916–Sep 1918
24-Month 		36.17"
(918.72mm)		 44.90"
(1,140.46mm)		 -8.73"
(-221.74mm)		 27th Driest
Driest since:
 1977
100th Wettest
Wettest since:
 1983
Oct 1915–Sep 1918
36-Month 		61.25"
(1,555.75mm)		 67.32"
(1,709.93mm)		 -6.07"
(-154.18mm)		 45th Driest
Driest since:
 2022
81st Wettest
Wettest since:
 1984
Oct 1914–Sep 1918
48-Month 		88.13"
(2,238.50mm)		 89.51"
(2,273.55mm)		 -1.38"
(-35.05mm)		 66th Driest
Driest since:
 2015
59th Wettest
Wettest since:
 1998
Oct 1913–Sep 1918
60-Month 		117.28"
(2,978.91mm)		 111.69"
(2,836.93mm)		 5.59"
(141.98mm)		 85th Driest
Driest since:
 1991
39th Wettest
Wettest since:
 1999

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