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 2017

View Period (Months):
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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 2017
1-Month
0.43"
(10.92mm)
0.45"
(11.43mm)
-0.02"
(-0.51mm)
83rd Driest
Driest since:
1974
46th Wettest
Wettest since:
1918
Ties: 1921
Aug–Sep 2017
2-Month
0.70"
(17.78mm)
0.69"
(17.53mm)
0.01"
(0.25mm)
85th Driest
Driest since:
1937, 2018
44th Wettest
Wettest since:
1983
Ties: 1921, 1941, 1945, 1955, 1973
Jul–Sep 2017
3-Month
0.79"
(20.07mm)
0.87"
(22.10mm)
-0.08"
(-2.03mm)
69th Driest
Driest since:
1928
60th Wettest
Wettest since:
1976
Jun–Sep 2017
4-Month
1.05"
(26.67mm)
1.22"
(30.99mm)
-0.17"
(-4.32mm)
58th Driest
Driest since:
2002
71st Wettest
Wettest since:
1982
Ties: 1922, 1938
May–Sep 2017
5-Month
1.48"
(37.59mm)
2.10"
(53.34mm)
-0.62"
(-15.75mm)
30th Driest
Driest since:
1924
99th Wettest
Wettest since:
1998
Ties: 1917, 1940
Apr–Sep 2017
6-Month
4.24"
(107.70mm)
3.74"
(95.00mm)
0.50"
(12.70mm)
94th Driest
Driest since:
1924
35th Wettest
Wettest since:
1896
Mar–Sep 2017
7-Month
6.69"
(169.93mm)
6.95"
(176.53mm)
-0.26"
(-6.60mm)
72nd Driest
Driest since:
2008
57th Wettest
Wettest since:
1995
Ties: 1902
Feb–Sep 2017
8-Month
14.63"
(371.60mm)
10.80"
(274.32mm)
3.83"
(97.28mm)
114th Driest
Driest since:
2021
15th Wettest
Wettest since:
1998
Jan–Sep 2017
9-Month
24.55"
(623.57mm)
15.05"
(382.27mm)
9.50"
(241.30mm)
123rd Driest
Driest since:
2022
6th Wettest
Wettest since:
1998
Dec 2016–Sep 2017
10-Month
29.04"
(737.62mm)
18.67"
(474.22mm)
10.37"
(263.40mm)
120th Driest
Driest since:
1924
8th Wettest
Wettest since:
1983
Nov 2016–Sep 2017
11-Month
31.20"
(792.48mm)
21.25"
(539.75mm)
9.95"
(252.73mm)
121st Driest
Driest since:
1924
7th Wettest
Wettest since:
1983
Oct 2016–Sep 2017
12-Month
35.02"
(889.51mm)
22.45"
(570.23mm)
12.57"
(319.28mm)
124th Driest
Driest since:
1924
4th Wettest
Wettest since:
1983
Apr 2016–Sep 2017
18-Month
37.80"
(960.12mm)
26.19"
(665.23mm)
11.61"
(294.89mm)
122nd Driest
Driest since:
2021
6th Wettest
Wettest since:
1983
Oct 2015–Sep 2017
24-Month
57.74"
(1,466.60mm)
44.90"
(1,140.46mm)
12.84"
(326.14mm)
117th Driest
Driest since:
1977
10th Wettest
Wettest since:
1983
Oct 2014–Sep 2017
36-Month
74.52"
(1,892.81mm)
67.32"
(1,709.93mm)
7.20"
(182.88mm)
96th Driest
Driest since:
2022
30th Wettest
Wettest since:
1984
Oct 2013–Sep 2017
48-Month
86.91"
(2,207.51mm)
89.51"
(2,273.55mm)
-2.60"
(-66.04mm)
61st Driest
Driest since:
2015
64th Wettest
Wettest since:
1998
Oct 2012–Sep 2017
60-Month
103.86"
(2,638.04mm)
111.69"
(2,836.93mm)
-7.83"
(-198.89mm)
47th Driest
Driest since:
1991
77th Wettest
Wettest since:
1999
Ties: 1947

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