Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. Degree Days are not available for Great Plains, Souther Plains and Gulf Coast Rockies and Westward, River Basins, or Agricultural Belts. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Great Lakes Basin

Precipitation Rankings, October 2019

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
October 2019
1-Month		5.13"
(130.30mm)		2.75"
(69.85mm)		2.38"
(60.45mm)		125th Driest
Driest since:
1924
4th Wettest
Wettest since:
2017
Sep–Oct 2019
2-Month		9.82"
(249.43mm)		6.12"
(155.45mm)		3.70"
(93.98mm)		127th Driest
Driest since:
1908
2nd Wettest
Wettest since:
1986
Aug–Oct 2019
3-Month		12.85"
(326.39mm)		9.34"
(237.24mm)		3.51"
(89.15mm)		124th Driest
Driest since:
1908
5th Wettest
Wettest since:
1986
Jul–Oct 2019
4-Month		16.37"
(415.80mm)		12.60"
(320.04mm)		3.77"
(95.76mm)		124th Driest
Driest since:
1930
5th Wettest
Wettest since:
1986
Ties: 1992
Jun–Oct 2019
5-Month		20.91"
(531.11mm)		16.06"
(407.92mm)		4.85"
(123.19mm)		126th Driest
Driest since:
1908
3rd Wettest
Wettest since:
1986
May–Oct 2019
6-Month		25.66"
(651.76mm)		19.29"
(489.97mm)		6.37"
(161.79mm)		128th Driest
Driest since:
1895
1st Wettest
Wettest to Date
2019
Apr–Oct 2019
7-Month		29.48"
(748.79mm)		22.08"
(560.83mm)		7.40"
(187.96mm)		128th Driest
Driest since:
1895
1st Wettest
Wettest to Date
2019
Mar–Oct 2019
8-Month		31.46"
(799.08mm)		24.35"
(618.49mm)		7.11"
(180.59mm)		128th Driest
Driest since:
1895
1st Wettest
Wettest to Date
2019
Feb–Oct 2019
9-Month		34.27"
(870.46mm)		26.01"
(660.65mm)		8.26"
(209.81mm)		128th Driest
Driest since:
1895
1st Wettest
Wettest to Date
2019
Jan–Oct 2019
10-Month		36.83"
(935.48mm)		27.98"
(710.69mm)		8.85"
(224.79mm)		128th Driest
Driest since:
1895
1st Wettest
Wettest to Date
2019
Dec 2018–Oct 2019
11-Month		38.86"
(987.04mm)		30.12"
(765.05mm)		8.74"
(221.99mm)		127th Driest
Driest since:
1963
1st Wettest
Wettest to Date
2019
Nov 2018–Oct 2019
12-Month		42.01"
(1,067.05mm)		32.78"
(832.61mm)		9.23"
(234.44mm)		127th Driest
Driest since:
1963
1st Wettest
Wettest to Date
2019
May 2018–Oct 2019
18-Month		65.60"
(1,666.24mm)		52.05"
(1,322.07mm)		13.55"
(344.17mm)		127th Driest
Driest since:
1963
1st Wettest
Wettest to Date
2019
Nov 2017–Oct 2019
24-Month		80.31"
(2,039.87mm)		65.54"
(1,664.72mm)		14.77"
(375.15mm)		126th Driest
Driest since:
1963
1st Wettest
Wettest to Date
2019
Nov 2016–Oct 2019
36-Month		120.95"
(3,072.13mm)		98.30"
(2,496.82mm)		22.65"
(575.31mm)		125th Driest
Driest since:
1964
1st Wettest
Wettest to Date
2019
Nov 2015–Oct 2019
48-Month		158.66"
(4,029.96mm)		131.09"
(3,329.69mm)		27.57"
(700.27mm)		124th Driest
Driest since:
1964
1st Wettest
Wettest to Date
2019
Nov 2014–Oct 2019
60-Month		191.78"
(4,871.21mm)		163.85"
(4,161.79mm)		27.93"
(709.42mm)		121st Driest
Driest since:
1934
3rd Wettest
Wettest to Date
2020

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