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.

Pennsylvania

Precipitation Rankings, October 2021

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
October 2021
1-Month		4.61"
(117.09mm)		3.17"
(80.52mm)		1.44"
(36.57mm)		101st Driest
Driest since:
1963
28th Wettest
Wettest since:
1976
Sep–Oct 2021
2-Month		11.59"
(294.39mm)		6.75"
(171.45mm)		4.84"
(122.94mm)		125th Driest
Driest since:
1963
4th Wettest
Wettest since:
2011
Aug–Oct 2021
3-Month		17.48"
(443.99mm)		10.62"
(269.75mm)		6.86"
(174.24mm)		126th Driest
Driest since:
1930
3rd Wettest
Wettest since:
2011
Jul–Oct 2021
4-Month		23.72"
(602.49mm)		14.81"
(376.17mm)		8.91"
(226.32mm)		125th Driest
Driest since:
1930
4th Wettest
Wettest since:
2018
Jun–Oct 2021
5-Month		27.26"
(692.40mm)		18.98"
(482.09mm)		8.28"
(210.31mm)		124th Driest
Driest since:
1930
5th Wettest
Wettest since:
2018
May–Oct 2021
6-Month		31.54"
(801.12mm)		22.91"
(581.91mm)		8.63"
(219.21mm)		124th Driest
Driest since:
1930
5th Wettest
Wettest since:
2018
Apr–Oct 2021
7-Month		34.33"
(871.98mm)		26.55"
(674.37mm)		7.78"
(197.61mm)		123rd Driest
Driest since:
1963
6th Wettest
Wettest since:
2018
Mar–Oct 2021
8-Month		37.14"
(943.36mm)		30.04"
(763.02mm)		7.10"
(180.34mm)		123rd Driest
Driest since:
1930
6th Wettest
Wettest since:
2011
Feb–Oct 2021
9-Month		40.16"
(1,020.06mm)		32.64"
(829.06mm)		7.52"
(191.00mm)		121st Driest
Driest since:
1963
8th Wettest
Wettest since:
2011
Jan–Oct 2021
10-Month		41.95"
(1,065.53mm)		35.69"
(906.53mm)		6.26"
(159.00mm)		117th Driest
Driest since:
1963
12th Wettest
Wettest since:
2018
Dec 2020–Oct 2021
11-Month		46.39"
(1,178.31mm)		38.79"
(985.27mm)		7.60"
(193.04mm)		117th Driest
Driest since:
1963
11th Wettest
Wettest since:
2011
Nov 2020–Oct 2021
12-Month		49.36"
(1,253.74mm)		42.00"
(1,066.80mm)		7.36"
(186.94mm)		119th Driest
Driest since:
1963
9th Wettest
Wettest since:
2011
May 2020–Oct 2021
18-Month		70.03"
(1,778.76mm)		64.86"
(1,647.44mm)		5.17"
(131.32mm)		98th Driest
Driest since:
1963
30th Wettest
Wettest since:
2019
Nov 2019–Oct 2021
24-Month		91.36"
(2,320.54mm)		83.94"
(2,132.08mm)		7.42"
(188.46mm)		102nd Driest
Driest since:
1964
25th Wettest
Wettest since:
2019
Nov 2018–Oct 2021
36-Month		146.31"
(3,716.27mm)		125.92"
(3,198.37mm)		20.39"
(517.90mm)		119th Driest
Driest since:
1965
7th Wettest
Wettest since:
2019
Nov 2017–Oct 2021
48-Month		204.62"
(5,197.35mm)		167.91"
(4,264.91mm)		36.71"
(932.44mm)		124th Driest
Driest since:
1966
1st Wettest
Wettest to Date
2021
Nov 2016–Oct 2021
60-Month		251.75"
(6,394.45mm)		209.89"
(5,331.21mm)		41.86"
(1,063.24mm)		123rd Driest
Driest since:
1966
1st Wettest
Wettest to Date
2021

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