Climate at a Glance

Statewide Rankings

Look up monthly rankings for 1-12, 18, 24, 36, 48, and 60-month time periods using the options below. Data and statistics are as of August 2020. For more information, please see Climatological Rankings.


Maryland

Precipitation Rankings, September 1999

View Period (Months):All1234567891011121824364860
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2019)
Wettest/Driest
Since
Record
September 1999
1-Month
10.35"
(262.89mm)
3.56"
(90.42mm)
6.79"
(172.47mm)
125th Driest Driest since: 1998 1941
1st Wettest Wettest to Date 1999
Aug–Sep 1999
2-Month
14.75"
(374.65mm)
7.95"
(201.93mm)
6.80"
(172.72mm)
124th Driest Driest since: 1998 1930
2nd Wettest Wettest to Date 2011
Jul–Sep 1999
3-Month
17.36"
(440.94mm)
12.13"
(308.10mm)
5.23"
(132.84mm)
115th Driest Driest since: 1998 1930
11th Wettest Wettest since: 1996 2018
Jun–Sep 1999
4-Month
19.55"
(496.57mm)
15.98"
(405.89mm)
3.57"
(90.68mm)
103rd Driest Driest since: 1998 1930
23rd Wettest Wettest since: 1996 2018
May–Sep 1999
5-Month
21.08"
(535.43mm)
19.71"
(500.63mm)
1.37"
(34.80mm)
77th Driest Driest since: 1998 1930
49th Wettest Wettest since: 1996 2018
Apr–Sep 1999
6-Month
24.12"
(612.65mm)
23.19"
(589.03mm)
0.93"
(23.62mm)
79th Driest Driest since: 1998 1930
47th Wettest Wettest since: 1996 2018
Mar–Sep 1999
7-Month
28.43"
(722.12mm)
26.97"
(685.04mm)
1.46"
(37.08mm)
82nd Driest Driest since: 1998 1930
44th Wettest Wettest since: 1996 2018
Feb–Sep 1999
8-Month
30.99"
(787.15mm)
29.85"
(758.19mm)
1.14"
(28.96mm)
74th Driest Driest since: 1997 1930
52nd Wettest Wettest since: 1998 2018
Jan–Sep 1999
9-Month
36.39"
(924.31mm)
33.21"
(843.53mm)
3.18"
(80.78mm)
96th Driest Driest since: 1997 1930
30th Wettest Wettest since: 1998 2018
Dec 1998–Sep 1999
10-Month
38.50"
(977.90mm)
36.49"
(926.85mm)
2.01"
(51.05mm)
77th Driest Driest since: 1997 1930
48th Wettest Wettest since: 1998 2003
Nov 1998–Sep 1999
11-Month
39.54"
(1,004.32mm)
39.48"
(1,002.79mm)
0.06"
(1.53mm)
67th Driest Driest since: 1997 1930
58th Wettest Wettest since: 1998 2003
Oct 1998–Sep 1999
12-Month
41.31"
(1,049.27mm)
42.62"
(1,082.55mm)
-1.31"
(-33.28mm)
58th Driest Driest since: 1995 1930
67th Wettest Wettest since: 1998 2003
Apr 1998–Sep 1999
18-Month
61.29"
(1,556.77mm)
65.72"
(1,669.29mm)
-4.43"
(-112.52mm)
36th Driest Driest since: 1995 1966
89th Wettest Wettest since: 1998 2019
Oct 1997–Sep 1999
24-Month
90.25"
(2,292.35mm)
85.14"
(2,162.56mm)
5.11"
(129.79mm)
82nd Driest Driest since: 1995 1930
42nd Wettest Wettest since: 1998 2004
Oct 1996–Sep 1999
36-Month
131.64"
(3,343.66mm)
127.72"
(3,244.09mm)
3.92"
(99.57mm)
71st Driest Driest since: 1995 1931
52nd Wettest Wettest since: 1998 2005
Oct 1995–Sep 1999
48-Month
189.66"
(4,817.36mm)
170.22"
(4,323.59mm)
19.44"
(493.77mm)
115th Driest Driest since: 1998 1932
7th Wettest Wettest since: 1975 2006
Oct 1994–Sep 1999
60-Month
222.58"
(5,653.53mm)
212.69"
(5,402.33mm)
9.89"
(251.20mm)
87th Driest Driest since: 1995 1966
34th Wettest Wettest since: 1998 1975

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published September 2020, retrieved on September 22, 2020 from https://www.ncdc.noaa.gov/cag/