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 1977

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 1977
1-Month
0.87"
(22.10mm)
0.45"
(11.43mm)
0.42"
(10.67mm)
109th Driest
Driest since:
1974
20th Wettest
Wettest since:
1918
Aug–Sep 1977
2-Month
1.62"
(41.15mm)
0.69"
(17.53mm)
0.93"
(23.62mm)
124th Driest
Driest since:
1937, 2018
5th Wettest
Wettest since:
1983
Ties: 1982, 1989
Jul–Sep 1977
3-Month
1.70"
(43.18mm)
0.87"
(22.10mm)
0.83"
(21.08mm)
122nd Driest
Driest since:
1928
7th Wettest
Wettest since:
1976
Jun–Sep 1977
4-Month
2.05"
(52.07mm)
1.22"
(30.99mm)
0.83"
(21.08mm)
119th Driest
Driest since:
2002
10th Wettest
Wettest since:
1982
May–Sep 1977
5-Month
3.93"
(99.82mm)
2.10"
(53.34mm)
1.83"
(46.48mm)
125th Driest
Driest since:
1924
4th Wettest
Wettest since:
1998
Apr–Sep 1977
6-Month
4.16"
(105.66mm)
3.74"
(95.00mm)
0.42"
(10.66mm)
93rd Driest
Driest since:
1924
36th Wettest
Wettest since:
1896
Mar–Sep 1977
7-Month
5.80"
(147.32mm)
6.95"
(176.53mm)
-1.15"
(-29.21mm)
54th Driest
Driest since:
2008
75th Wettest
Wettest since:
1995
Feb–Sep 1977
8-Month
6.96"
(176.78mm)
10.80"
(274.32mm)
-3.84"
(-97.54mm)
21st Driest
Driest since:
2021
108th Wettest
Wettest since:
1998
Jan–Sep 1977
9-Month
8.94"
(227.08mm)
15.05"
(382.27mm)
-6.11"
(-155.19mm)
17th Driest
Driest since:
2022
112th Wettest
Wettest since:
1998
Dec 1976–Sep 1977
10-Month
9.49"
(241.05mm)
18.67"
(474.22mm)
-9.18"
(-233.17mm)
3rd Driest
Driest since:
1924
125th Wettest
Wettest since:
1983
Nov 1976–Sep 1977
11-Month
10.35"
(262.89mm)
21.25"
(539.75mm)
-10.90"
(-276.86mm)
2nd Driest
Driest since:
1924
126th Wettest
Wettest since:
1983
Oct 1976–Sep 1977
12-Month
10.86"
(275.84mm)
22.45"
(570.23mm)
-11.59"
(-294.39mm)
2nd Driest
Driest since:
1924
126th Wettest
Wettest since:
1983
Apr 1976–Sep 1977
18-Month
14.95"
(379.73mm)
26.19"
(665.23mm)
-11.24"
(-285.50mm)
2nd Driest
Driest since:
2021
126th Wettest
Wettest since:
1983
Oct 1975–Sep 1977
24-Month
25.52"
(648.21mm)
44.90"
(1,140.46mm)
-19.38"
(-492.25mm)
1st Driest
Driest since:
1977
126th Wettest
Wettest since:
1983
Oct 1974–Sep 1977
36-Month
47.58"
(1,208.53mm)
67.32"
(1,709.93mm)
-19.74"
(-501.40mm)
4th Driest
Driest since:
2022
122nd Wettest
Wettest since:
1984
Oct 1973–Sep 1977
48-Month
75.53"
(1,918.46mm)
89.51"
(2,273.55mm)
-13.98"
(-355.09mm)
19th Driest
Driest since:
2015
106th Wettest
Wettest since:
1998
Oct 1972–Sep 1977
60-Month
100.90"
(2,562.86mm)
111.69"
(2,836.93mm)
-10.79"
(-274.07mm)
32nd Driest
Driest since:
1991
92nd Wettest
Wettest since:
1999

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