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, October 2021

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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
October 2021
1-Month 		3.66"
(92.96mm)		 1.20"
(30.48mm)		 2.46"
(62.48mm)		 125th Driest
Driest since:
 1917
4th Wettest
Wettest since:
 1962
Sep–Oct 2021
2-Month 		4.02"
(102.11mm)		 1.65"
(41.91mm)		 2.37"
(60.20mm)		 127th Driest
Driest since:
 2020
2nd Wettest
Wettest since:
 1962
Aug–Oct 2021
3-Month 		4.12"
(104.65mm)		 1.89"
(48.01mm)		 2.23"
(56.64mm)		 126th Driest
Driest since:
 1995, 2002
3rd Wettest
Wettest since:
 1962
Ties: 1904
Jul–Oct 2021
4-Month 		4.41"
(112.01mm)		 2.07"
(52.58mm)		 2.34"
(59.43mm)		 126th Driest
Driest since:
 2002, 2020
3rd Wettest
Wettest since:
 1962
Jun–Oct 2021
5-Month 		4.55"
(115.57mm)		 2.42"
(61.47mm)		 2.13"
(54.10mm)		 125th Driest
Driest since:
 2002
4th Wettest
Wettest since:
 1982
May–Oct 2021
6-Month 		4.66"
(118.36mm)		 3.30"
(83.82mm)		 1.36"
(34.54mm)		 114th Driest
Driest since:
 2002
15th Wettest
Wettest since:
 1957
Ties: 2010
Apr–Oct 2021
7-Month 		4.95"
(125.73mm)		 4.93"
(125.22mm)		 0.02"
(0.51mm)		 75th Driest
Driest since:
 2002
54th Wettest
Wettest since:
 1963
Mar–Oct 2021
8-Month 		6.68"
(169.67mm)		 8.14"
(206.76mm)		 -1.46"
(-37.09mm)		 48th Driest
Driest since:
 2008
81st Wettest
Wettest since:
 1983
Feb–Oct 2021
9-Month 		8.07"
(204.98mm)		 11.99"
(304.55mm)		 -3.92"
(-99.57mm)		 22nd Driest
Driest since:
 1966
107th Wettest
Wettest since:
 1998
Jan–Oct 2021
10-Month 		11.72"
(297.69mm)		 16.24"
(412.50mm)		 -4.52"
(-114.81mm)		 31st Driest
Driest since:
 2022
98th Wettest
Wettest since:
 1998
Dec 2020–Oct 2021
11-Month 		13.55"
(344.17mm)		 19.87"
(504.70mm)		 -6.32"
(-160.53mm)		 20th Driest
Driest since:
 1977
108th Wettest
Wettest since:
 1983
Nov 2020–Oct 2021
12-Month 		14.74"
(374.40mm)		 22.44"
(569.98mm)		 -7.70"
(-195.58mm)		 9th Driest
Driest since:
 1977
119th Wettest
Wettest since:
 1983
May 2020–Oct 2021
18-Month 		16.34"
(415.04mm)		 25.75"
(654.05mm)		 -9.41"
(-239.01mm)		 5th Driest
Driest since:
 1977
123rd Wettest
Wettest since:
 1983
Nov 2019–Oct 2021
24-Month 		30.27"
(768.86mm)		 44.87"
(1,139.70mm)		 -14.60"
(-370.84mm)		 5th Driest
Driest since:
 1977
122nd Wettest
Wettest since:
 1983
Nov 2018–Oct 2021
36-Month 		58.10"
(1,475.74mm)		 67.29"
(1,709.17mm)		 -9.19"
(-233.43mm)		 31st Driest
Driest since:
 2022
95th Wettest
Wettest since:
 1984
Nov 2017–Oct 2021
48-Month 		74.28"
(1,886.71mm)		 89.47"
(2,272.54mm)		 -15.19"
(-385.83mm)		 18th Driest
Driest since:
 2015
107th Wettest
Wettest since:
 1998
Nov 2016–Oct 2021
60-Month 		105.82"
(2,687.83mm)		 111.65"
(2,835.91mm)		 -5.83"
(-148.08mm)		 55th Driest
Driest since:
 1991
69th Wettest
Wettest since:
 1999

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