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 1999

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 1999
1-Month
9.03"
(229.36mm)
3.79"
(96.27mm)
5.24"
(133.09mm)
126th Driest
Driest since:
1914
3rd Wettest
Wettest since:
1938
Aug–Sep 1999
2-Month
11.93"
(303.02mm)
7.69"
(195.33mm)
4.24"
(107.69mm)
117th Driest
Driest since:
1984
12th Wettest
Wettest since:
2011
Jul–Sep 1999
3-Month
14.85"
(377.19mm)
11.37"
(288.80mm)
3.48"
(88.39mm)
111th Driest
Driest since:
1968
18th Wettest
Wettest since:
2021
Jun–Sep 1999
4-Month
16.29"
(413.77mm)
15.02"
(381.51mm)
1.27"
(32.26mm)
81st Driest
Driest since:
1957
48th Wettest
Wettest since:
1938
Ties: 1973, 1994
May–Sep 1999
5-Month
20.20"
(513.08mm)
18.61"
(472.69mm)
1.59"
(40.39mm)
82nd Driest
Driest since:
1964
47th Wettest
Wettest since:
1938
Apr–Sep 1999
6-Month
21.32"
(541.53mm)
22.51"
(571.75mm)
-1.19"
(-30.22mm)
54th Driest
Driest since:
1964
75th Wettest
Wettest since:
1938
Mar–Sep 1999
7-Month
26.21"
(665.73mm)
26.45"
(671.83mm)
-0.24"
(-6.10mm)
58th Driest
Driest since:
1965
71st Wettest
Wettest since:
1938
Ties: 1959
Feb–Sep 1999
8-Month
29.80"
(756.92mm)
29.66"
(753.36mm)
0.14"
(3.56mm)
61st Driest
Driest since:
1957
68th Wettest
Wettest since:
2008
Jan–Sep 1999
9-Month
36.20"
(919.48mm)
33.30"
(845.82mm)
2.90"
(73.66mm)
89th Driest
Driest since:
1957
40th Wettest
Wettest since:
2008
Dec 1998–Sep 1999
10-Month
37.78"
(959.61mm)
37.13"
(943.10mm)
0.65"
(16.51mm)
66th Driest
Driest since:
1957
62nd Wettest
Wettest since:
2008
Nov 1998–Sep 1999
11-Month
40.11"
(1,018.79mm)
41.15"
(1,045.21mm)
-1.04"
(-26.42mm)
54th Driest
Driest since:
1965
74th Wettest
Wettest since:
2008
Oct 1998–Sep 1999
12-Month
45.10"
(1,145.54mm)
44.66"
(1,134.36mm)
0.44"
(11.18mm)
62nd Driest
Driest since:
1965
66th Wettest
Wettest since:
2006
Ties: 1931
Apr 1998–Sep 1999
18-Month
70.98"
(1,802.89mm)
67.07"
(1,703.58mm)
3.91"
(99.31mm)
78th Driest
Driest since:
1965
50th Wettest
Wettest since:
2006
Oct 1997–Sep 1999
24-Month
98.08"
(2,491.23mm)
89.25"
(2,266.95mm)
8.83"
(224.28mm)
95th Driest
Driest since:
1966
32nd Wettest
Wettest since:
2007
Oct 1996–Sep 1999
36-Month
145.23"
(3,688.84mm)
133.88"
(3,400.55mm)
11.35"
(288.29mm)
94th Driest
Driest since:
1966
32nd Wettest
Wettest since:
2008
Oct 1995–Sep 1999
48-Month
204.78"
(5,201.41mm)
178.50"
(4,533.90mm)
26.28"
(667.51mm)
115th Driest
Driest since:
1966
10th Wettest
Wettest since:
2009
Oct 1994–Sep 1999
60-Month
239.75"
(6,089.65mm)
223.10"
(5,666.74mm)
16.65"
(422.91mm)
95th Driest
Driest since:
1966
29th Wettest
Wettest since:
2010

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