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.

Alaska

Precipitation Rankings, September 1939

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Period Value 1925-2000
Mean		 Anomaly Rank
(1925-2022)		 Wettest/Driest
Since		 Record
September 1939
1-Month 		4.89"
(124.21mm)		 4.57"
(116.08mm)		 0.32"
(8.13mm)		 56th Driest
Driest since:
 1969
43rd Wettest
Wettest since:
 1925
Aug–Sep 1939
2-Month 		11.40"
(289.56mm)		 8.95"
(227.33mm)		 2.45"
(62.23mm)		 95th Driest
Driest since:
 1941
4th Wettest
Wettest to Date
 2022
Jul–Sep 1939
3-Month 		15.26"
(387.60mm)		 12.23"
(310.64mm)		 3.03"
(76.96mm)		 93rd Driest
Driest since:
 1968
6th Wettest
Wettest since:
 2022
Ties: 1928
Jun–Sep 1939
4-Month 		17.36"
(440.94mm)		 14.57"
(370.08mm)		 2.79"
(70.86mm)		 88th Driest
Driest since:
 1968
11th Wettest
Wettest since:
 2012
Ties: 1945
May–Sep 1939
5-Month 		19.34"
(491.24mm)		 16.68"
(423.67mm)		 2.66"
(67.57mm)		 88th Driest
Driest since:
 1969
11th Wettest
Wettest since:
 2012
Apr–Sep 1939
6-Month 		21.55"
(547.37mm)		 18.57"
(471.68mm)		 2.98"
(75.69mm)		 91st Driest
Driest since:
 1969
8th Wettest
Wettest since:
 1961
Mar–Sep 1939
7-Month 		23.66"
(600.96mm)		 20.80"
(528.32mm)		 2.86"
(72.64mm)		 89th Driest
Driest since:
 1969
10th Wettest
Wettest since:
 2016
Feb–Sep 1939
8-Month 		26.02"
(660.91mm)		 23.12"
(587.25mm)		 2.90"
(73.66mm)		 88th Driest
Driest since:
 1969
11th Wettest
Wettest since:
 1928
Jan–Sep 1939
9-Month 		28.98"
(736.09mm)		 25.85"
(656.59mm)		 3.13"
(79.50mm)		 85th Driest
Driest since:
 1969
14th Wettest
Wettest since:
 1928
Dec 1938–Sep 1939
10-Month 		32.52"
(826.01mm)		 28.92"
(734.57mm)		 3.60"
(91.44mm)		 86th Driest
Driest since:
 1969
12th Wettest
Wettest since:
 1928
Nov 1938–Sep 1939
11-Month 		37.06"
(941.32mm)		 32.29"
(820.17mm)		 4.77"
(121.15mm)		 92nd Driest
Driest since:
 1969
6th Wettest
Wettest since:
 1944
Oct 1938–Sep 1939
12-Month 		41.82"
(1,062.23mm)		 36.68"
(931.67mm)		 5.14"
(130.56mm)		 91st Driest
Driest since:
 1969
7th Wettest
Wettest since:
 1944
Apr 1938–Sep 1939
18-Month 		64.20"
(1,630.68mm)		 55.22"
(1,402.59mm)		 8.98"
(228.09mm)		 96th Driest
Driest since:
 1969
2nd Wettest
Wettest to Date
 1944
Oct 1937–Sep 1939
24-Month 		79.88"
(2,028.95mm)		 73.25"
(1,860.55mm)		 6.63"
(168.40mm)		 86th Driest
Driest since:
 1969
11th Wettest
Wettest since:
 1930
Oct 1936–Sep 1939
36-Month 		123.36"
(3,133.34mm)		 109.82"
(2,789.43mm)		 13.54"
(343.91mm)		 94th Driest
Driest since:
 1974
2nd Wettest
Wettest since:
 1930
Oct 1935–Sep 1939
48-Month 		156.93"
(3,986.02mm)		 146.31"
(3,716.27mm)		 10.62"
(269.75mm)		 87th Driest
Driest since:
 1969
8th Wettest
Wettest since:
 1932
Oct 1934–Sep 1939
60-Month 		196.12"
(4,981.45mm)		 182.77"
(4,642.36mm)		 13.35"
(339.09mm)		 89th Driest
Driest since:
 1972
5th Wettest
Wettest since:
 1932

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