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 1931

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 1931
1-Month
0.26"
(6.60mm)
0.45"
(11.43mm)
-0.19"
(-4.83mm)
55th Driest
Driest since:
1974
74th Wettest
Wettest since:
1918
Ties: 1960, 1969
Aug–Sep 1931
2-Month
0.83"
(21.08mm)
0.69"
(17.53mm)
0.14"
(3.55mm)
93rd Driest
Driest since:
1937, 2018
36th Wettest
Wettest since:
1983
Jul–Sep 1931
3-Month
0.87"
(22.10mm)
0.87"
(22.10mm)
0.00"
(0.00mm)
81st Driest
Driest since:
1928
48th Wettest
Wettest since:
1976
Jun–Sep 1931
4-Month
1.65"
(41.91mm)
1.22"
(30.99mm)
0.43"
(10.92mm)
106th Driest
Driest since:
2002
23rd Wettest
Wettest since:
1982
May–Sep 1931
5-Month
2.61"
(66.29mm)
2.10"
(53.34mm)
0.51"
(12.95mm)
98th Driest
Driest since:
1924
31st Wettest
Wettest since:
1998
Apr–Sep 1931
6-Month
3.86"
(98.04mm)
3.74"
(95.00mm)
0.12"
(3.04mm)
85th Driest
Driest since:
1924
44th Wettest
Wettest since:
1896
Mar–Sep 1931
7-Month
5.31"
(134.87mm)
6.95"
(176.53mm)
-1.64"
(-41.66mm)
43rd Driest
Driest since:
2008
86th Wettest
Wettest since:
1995
Feb–Sep 1931
8-Month
7.78"
(197.61mm)
10.80"
(274.32mm)
-3.02"
(-76.71mm)
32nd Driest
Driest since:
2021
97th Wettest
Wettest since:
1998
Ties: 1965
Jan–Sep 1931
9-Month
11.36"
(288.54mm)
15.05"
(382.27mm)
-3.69"
(-93.73mm)
39th Driest
Driest since:
2022
90th Wettest
Wettest since:
1998
Dec 1930–Sep 1931
10-Month
11.91"
(302.51mm)
18.67"
(474.22mm)
-6.76"
(-171.71mm)
12th Driest
Driest since:
1924
116th Wettest
Wettest since:
1983
Nov 1930–Sep 1931
11-Month
13.92"
(353.57mm)
21.25"
(539.75mm)
-7.33"
(-186.18mm)
11th Driest
Driest since:
1924
117th Wettest
Wettest since:
1983
Oct 1930–Sep 1931
12-Month
14.34"
(364.24mm)
22.45"
(570.23mm)
-8.11"
(-205.99mm)
7th Driest
Driest since:
1924
121st Wettest
Wettest since:
1983
Apr 1930–Sep 1931
18-Month
17.91"
(454.91mm)
26.19"
(665.23mm)
-8.28"
(-210.32mm)
9th Driest
Driest since:
2021
119th Wettest
Wettest since:
1983
Oct 1929–Sep 1931
24-Month
32.60"
(828.04mm)
44.90"
(1,140.46mm)
-12.30"
(-312.42mm)
13th Driest
Driest since:
1977
114th Wettest
Wettest since:
1983
Oct 1928–Sep 1931
36-Month
47.86"
(1,215.64mm)
67.32"
(1,709.93mm)
-19.46"
(-494.29mm)
5th Driest
Driest since:
2022
121st Wettest
Wettest since:
1984
Oct 1927–Sep 1931
48-Month
67.01"
(1,702.05mm)
89.51"
(2,273.55mm)
-22.50"
(-571.50mm)
3rd Driest
Driest since:
2015
122nd Wettest
Wettest since:
1998
Oct 1926–Sep 1931
60-Month
94.48"
(2,399.79mm)
111.69"
(2,836.93mm)
-17.21"
(-437.14mm)
13th Driest
Driest since:
1991
111th Wettest
Wettest since:
1999

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