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 October 2019. For more information, please see Climatological Rankings.


Pennsylvania

Precipitation Rankings, May 1999

View Period (Months):All1234567891011121824364860
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2019)
Wettest/Driest
Since
Record
May 1999
1-Month
2.56"
(65.02mm)
3.93"
(99.82mm)
-1.37"
(-34.80mm)
22nd Driest Driest since: 1993 1964
104th Wettest Wettest since: 1998 1989
Apr–May 1999
2-Month
6.52"
(165.61mm)
7.57"
(192.28mm)
-1.05"
(-26.67mm)
48th Driest Driest since: 1997 1926
78th Wettest Wettest since: 1998 2011
Mar–May 1999
3-Month
9.98"
(253.49mm)
11.06"
(280.92mm)
-1.08"
(-27.43mm)
46th Driest Driest since: 1997 1926
80th Wettest Wettest since: 1998 2011
Feb–May 1999
4-Month
11.88"
(301.75mm)
13.66"
(346.96mm)
-1.78"
(-45.21mm)
31st Driest Driest since: 1995 1941
95th Wettest Wettest since: 1998 2011
Jan–May 1999
5-Month
17.72"
(450.09mm)
16.71"
(424.43mm)
1.01"
(25.66mm)
84th Driest Driest since: 1997 1941
42nd Wettest Wettest since: 1998 2011
Ties: 2000
Dec 1998–May 1999
6-Month
19.18"
(487.17mm)
19.81"
(503.17mm)
-0.63"
(-16.00mm)
53rd Driest Driest since: 1995 1941
72nd Wettest Wettest since: 1998 2011
Nov 1998–May 1999
7-Month
20.37"
(517.40mm)
23.02"
(584.71mm)
-2.65"
(-67.31mm)
23rd Driest Driest since: 1988 1934
102nd Wettest Wettest since: 1998 1952
Ties: 1935
Oct 1998–May 1999
8-Month
23.45"
(595.63mm)
26.19"
(665.23mm)
-2.74"
(-69.60mm)
28th Driest Driest since: 1995 1925
97th Wettest Wettest since: 1998 2011
Sep 1998–May 1999
9-Month
25.58"
(649.73mm)
29.75"
(755.65mm)
-4.17"
(-105.92mm)
17th Driest Driest since: 1995 1941
108th Wettest Wettest since: 1998 2019
Aug 1998–May 1999
10-Month
28.51"
(724.15mm)
33.62"
(853.95mm)
-5.11"
(-129.80mm)
12th Driest Driest since: 1969 1931
113th Wettest Wettest since: 1998 2019
Jul 1998–May 1999
11-Month
31.38"
(797.05mm)
37.82"
(960.63mm)
-6.44"
(-163.58mm)
8th Driest Driest since: 1969 1931
117th Wettest Wettest since: 1998 2019
Jun 1998–May 1999
12-Month
36.53"
(927.86mm)
41.97"
(1,066.04mm)
-5.44"
(-138.18mm)
14th Driest Driest since: 1992 1931
111th Wettest Wettest since: 1998 2019
Dec 1997–May 1999
18-Month
60.78"
(1,543.81mm)
61.76"
(1,568.70mm)
-0.98"
(-24.89mm)
52nd Driest Driest since: 1992 1931
72nd Wettest Wettest since: 1998 2019
Ties: 2006
Jun 1997–May 1999
24-Month
82.60"
(2,098.04mm)
83.91"
(2,131.31mm)
-1.31"
(-33.27mm)
43rd Driest Driest since: 1993 1931
81st Wettest Wettest since: 1998 2019
Jun 1996–May 1999
36-Month
132.41"
(3,363.21mm)
125.93"
(3,198.62mm)
6.48"
(164.59mm)
91st Driest Driest since: 1994 1965
32nd Wettest Wettest since: 1998 2019
Jun 1995–May 1999
48-Month
177.43"
(4,506.72mm)
167.92"
(4,265.17mm)
9.51"
(241.55mm)
96th Driest Driest since: 1995 1966
26th Wettest Wettest since: 1998 2019
Jun 1994–May 1999
60-Month
218.69"
(5,554.73mm)
209.84"
(5,329.94mm)
8.85"
(224.79mm)
92nd Driest Driest since: 1996 1967
29th Wettest Wettest since: 1998 2008

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published November 2019, retrieved on November 18, 2019 from https://www.ncdc.noaa.gov/cag/