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, August 2020

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
August 2020
1-Month 		0.10"
(2.54mm)		 0.24"
(6.10mm)		 -0.14"
(-3.56mm)		 31st Driest
Driest since:
 1937, 2002
98th Wettest
Wettest since:
 1983
Ties: 1927, 1981, 2010, 2011, 2021
Jul–Aug 2020
2-Month 		0.15"
(3.81mm)		 0.42"
(10.67mm)		 -0.27"
(-6.86mm)		 9th Driest
Driest since:
 1940
120th Wettest
Wettest since:
 1983
Ties: 1944
Jun–Aug 2020
3-Month 		0.31"
(7.87mm)		 0.77"
(19.56mm)		 -0.46"
(-11.69mm)		 12th Driest
Driest since:
 2002
117th Wettest
Wettest since:
 1913
Ties: 1905, 1949
May–Aug 2020
4-Month 		1.51"
(38.35mm)		 1.65"
(41.91mm)		 -0.14"
(-3.56mm)		 67th Driest
Driest since:
 1924
62nd Wettest
Wettest since:
 1998
Apr–Aug 2020
5-Month 		3.50"
(88.90mm)		 3.28"
(83.31mm)		 0.22"
(5.59mm)		 86th Driest
Driest since:
 2021
43rd Wettest
Wettest since:
 1896
Mar–Aug 2020
6-Month 		6.69"
(169.93mm)		 6.50"
(165.10mm)		 0.19"
(4.83mm)		 76th Driest
Driest since:
 2008
53rd Wettest
Wettest since:
 1995
Feb–Aug 2020
7-Month 		6.90"
(175.26mm)		 10.35"
(262.89mm)		 -3.45"
(-87.63mm)		 23rd Driest
Driest since:
 1997, 2021
106th Wettest
Wettest since:
 1998
Ties: 1951
Jan–Aug 2020
8-Month 		8.96"
(227.58mm)		 14.60"
(370.84mm)		 -5.64"
(-143.26mm)		 21st Driest
Driest since:
 2022
108th Wettest
Wettest since:
 1995
Dec 2019–Aug 2020
9-Month 		13.83"
(351.28mm)		 18.22"
(462.79mm)		 -4.39"
(-111.51mm)		 34th Driest
Driest since:
 1924
94th Wettest
Wettest since:
 1998
Nov 2019–Aug 2020
10-Month 		15.44"
(392.18mm)		 20.80"
(528.32mm)		 -5.36"
(-136.14mm)		 27th Driest
Driest since:
 1924
101st Wettest
Wettest since:
 1983
Oct 2019–Aug 2020
11-Month 		15.60"
(396.24mm)		 22.00"
(558.80mm)		 -6.40"
(-162.56mm)		 17th Driest
Driest since:
 1924
111th Wettest
Wettest since:
 1983
Ties: 2022
Sep 2019–Aug 2020
12-Month 		16.21"
(411.73mm)		 22.44"
(569.98mm)		 -6.23"
(-158.25mm)		 21st Driest
Driest since:
 2021
107th Wettest
Wettest since:
 1983
Mar 2019–Aug 2020
18-Month 		24.28"
(616.71mm)		 28.96"
(735.58mm)		 -4.68"
(-118.87mm)		 39th Driest
Driest since:
 1977
89th Wettest
Wettest since:
 1983
Sep 2018–Aug 2020
24-Month 		44.03"
(1,118.36mm)		 44.90"
(1,140.46mm)		 -0.87"
(-22.10mm)		 66th Driest
Driest since:
 1977
61st Wettest
Wettest since:
 1983
Sep 2017–Aug 2020
36-Month 		60.22"
(1,529.59mm)		 67.31"
(1,709.67mm)		 -7.09"
(-180.08mm)		 40th Driest
Driest since:
 2022
86th Wettest
Wettest since:
 1984
Sep 2016–Aug 2020
48-Month 		94.91"
(2,410.71mm)		 89.50"
(2,273.30mm)		 5.41"
(137.41mm)		 87th Driest
Driest since:
 2015
38th Wettest
Wettest since:
 1998
Sep 2015–Aug 2020
60-Month 		117.86"
(2,993.64mm)		 111.68"
(2,836.67mm)		 6.18"
(156.97mm)		 86th Driest
Driest since:
 1991
38th Wettest
Wettest since:
 1999

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