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 1939

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 1939
1-Month
1.11"
(28.19mm)
0.45"
(11.43mm)
0.66"
(16.76mm)
119th Driest
Driest since:
1974
10th Wettest
Wettest since:
1918
Aug–Sep 1939
2-Month
1.29"
(32.77mm)
0.69"
(17.53mm)
0.60"
(15.24mm)
116th Driest
Driest since:
1937, 2018
13th Wettest
Wettest since:
1983
Jul–Sep 1939
3-Month
1.47"
(37.34mm)
0.87"
(22.10mm)
0.60"
(15.24mm)
116th Driest
Driest since:
1928
13th Wettest
Wettest since:
1976
Ties: 1984
Jun–Sep 1939
4-Month
1.60"
(40.64mm)
1.22"
(30.99mm)
0.38"
(9.65mm)
103rd Driest
Driest since:
2002
26th Wettest
Wettest since:
1982
May–Sep 1939
5-Month
2.63"
(66.80mm)
2.10"
(53.34mm)
0.53"
(13.46mm)
100th Driest
Driest since:
1924
29th Wettest
Wettest since:
1998
Apr–Sep 1939
6-Month
3.18"
(80.77mm)
3.74"
(95.00mm)
-0.56"
(-14.23mm)
51st Driest
Driest since:
1924
78th Wettest
Wettest since:
1896
Ties: 2018
Mar–Sep 1939
7-Month
5.83"
(148.08mm)
6.95"
(176.53mm)
-1.12"
(-28.45mm)
57th Driest
Driest since:
2008
72nd Wettest
Wettest since:
1995
Feb–Sep 1939
8-Month
7.80"
(198.12mm)
10.80"
(274.32mm)
-3.00"
(-76.20mm)
35th Driest
Driest since:
2021
94th Wettest
Wettest since:
1998
Ties: 1932
Jan–Sep 1939
9-Month
10.87"
(276.10mm)
15.05"
(382.27mm)
-4.18"
(-106.17mm)
33rd Driest
Driest since:
2022
96th Wettest
Wettest since:
1998
Dec 1938–Sep 1939
10-Month
13.60"
(345.44mm)
18.67"
(474.22mm)
-5.07"
(-128.78mm)
25th Driest
Driest since:
1924
103rd Wettest
Wettest since:
1983
Nov 1938–Sep 1939
11-Month
14.84"
(376.94mm)
21.25"
(539.75mm)
-6.41"
(-162.81mm)
17th Driest
Driest since:
1924
111th Wettest
Wettest since:
1983
Oct 1938–Sep 1939
12-Month
16.35"
(415.29mm)
22.45"
(570.23mm)
-6.10"
(-154.94mm)
21st Driest
Driest since:
1924
107th Wettest
Wettest since:
1983
Apr 1938–Sep 1939
18-Month
19.71"
(500.63mm)
26.19"
(665.23mm)
-6.48"
(-164.60mm)
21st Driest
Driest since:
2021
107th Wettest
Wettest since:
1983
Oct 1937–Sep 1939
24-Month
50.06"
(1,271.52mm)
44.90"
(1,140.46mm)
5.16"
(131.06mm)
98th Driest
Driest since:
1977
29th Wettest
Wettest since:
1983
Oct 1936–Sep 1939
36-Month
73.18"
(1,858.77mm)
67.32"
(1,709.93mm)
5.86"
(148.84mm)
91st Driest
Driest since:
2022
35th Wettest
Wettest since:
1984
Oct 1935–Sep 1939
48-Month
96.24"
(2,444.50mm)
89.51"
(2,273.55mm)
6.73"
(170.95mm)
91st Driest
Driest since:
2015
34th Wettest
Wettest since:
1998
Oct 1934–Sep 1939
60-Month
121.20"
(3,078.48mm)
111.69"
(2,836.93mm)
9.51"
(241.55mm)
97th Driest
Driest since:
1991
27th Wettest
Wettest since:
1999

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