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.

Massachusetts

Precipitation Rankings, September 1940

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
September 1940
1-Month
3.07"
(77.98mm)
3.79"
(96.27mm)
-0.72"
(-18.29mm)
57th Driest
Driest since:
1914
72nd Wettest
Wettest since:
1938
Aug–Sep 1940
2-Month
4.80"
(121.92mm)
7.69"
(195.33mm)
-2.89"
(-73.41mm)
14th Driest
Driest since:
1984
115th Wettest
Wettest since:
2011
Jul–Sep 1940
3-Month
8.44"
(214.38mm)
11.37"
(288.80mm)
-2.93"
(-74.42mm)
19th Driest
Driest since:
1968
110th Wettest
Wettest since:
2021
Jun–Sep 1940
4-Month
11.42"
(290.07mm)
15.02"
(381.51mm)
-3.60"
(-91.44mm)
19th Driest
Driest since:
1957
110th Wettest
Wettest since:
1938
May–Sep 1940
5-Month
16.33"
(414.78mm)
18.61"
(472.69mm)
-2.28"
(-57.91mm)
33rd Driest
Driest since:
1964
96th Wettest
Wettest since:
1938
Apr–Sep 1940
6-Month
22.10"
(561.34mm)
22.51"
(571.75mm)
-0.41"
(-10.41mm)
61st Driest
Driest since:
1964
68th Wettest
Wettest since:
1938
Mar–Sep 1940
7-Month
26.55"
(674.37mm)
26.45"
(671.83mm)
0.10"
(2.54mm)
66th Driest
Driest since:
1965
63rd Wettest
Wettest since:
1938
Feb–Sep 1940
8-Month
30.61"
(777.49mm)
29.66"
(753.36mm)
0.95"
(24.13mm)
70th Driest
Driest since:
1957
59th Wettest
Wettest since:
2008
Jan–Sep 1940
9-Month
33.00"
(838.20mm)
33.30"
(845.82mm)
-0.30"
(-7.62mm)
56th Driest
Driest since:
1957
73rd Wettest
Wettest since:
2008
Dec 1939–Sep 1940
10-Month
35.94"
(912.88mm)
37.13"
(943.10mm)
-1.19"
(-30.22mm)
50th Driest
Driest since:
1957
78th Wettest
Wettest since:
2008
Nov 1939–Sep 1940
11-Month
37.28"
(946.91mm)
41.15"
(1,045.21mm)
-3.87"
(-98.30mm)
33rd Driest
Driest since:
1965
95th Wettest
Wettest since:
2008
Oct 1939–Sep 1940
12-Month
41.79"
(1,061.47mm)
44.66"
(1,134.36mm)
-2.87"
(-72.89mm)
39th Driest
Driest since:
1965
89th Wettest
Wettest since:
2006
Apr 1939–Sep 1940
18-Month
59.93"
(1,522.22mm)
67.07"
(1,703.58mm)
-7.14"
(-181.36mm)
20th Driest
Driest since:
1965
108th Wettest
Wettest since:
2006
Oct 1938–Sep 1940
24-Month
80.31"
(2,039.87mm)
89.25"
(2,266.95mm)
-8.94"
(-227.08mm)
17th Driest
Driest since:
1966
110th Wettest
Wettest since:
2007
Oct 1937–Sep 1940
36-Month
139.60"
(3,545.84mm)
133.88"
(3,400.55mm)
5.72"
(145.29mm)
76th Driest
Driest since:
1966
50th Wettest
Wettest since:
2008
Oct 1936–Sep 1940
48-Month
188.07"
(4,776.98mm)
178.50"
(4,533.90mm)
9.57"
(243.08mm)
78th Driest
Driest since:
1966
47th Wettest
Wettest since:
2009
Oct 1935–Sep 1940
60-Month
233.68"
(5,935.47mm)
223.10"
(5,666.74mm)
10.58"
(268.73mm)
77th Driest
Driest since:
1966
47th Wettest
Wettest since:
2010

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