Climate at a Glance

National 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 2022. For more information, please see Climatological Rankings.


Contiguous U.S.

Precipitation Rankings, May 1999

View Period (Months):All1234567891011121824364860
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
May 1999
1-Month
2.91"
(73.91mm)
2.91"
(73.91mm)
0.00"
(0.00mm)
61st Driest Driest since: 1998 1934
68th Wettest Wettest since: 1996 2019
Apr–May 1999
2-Month
5.78"
(146.81mm)
5.43"
(137.92mm)
0.35"
(8.89mm)
86th Driest Driest since: 1998 1934
43rd Wettest Wettest since: 1996 1957
Mar–May 1999
3-Month
7.97"
(202.44mm)
7.94"
(201.68mm)
0.03"
(0.76mm)
68th Driest Driest since: 1994 1925
61st Wettest Wettest since: 1998 1957, 1991
Ties: 2013
Feb–May 1999
4-Month
9.89"
(251.21mm)
10.07"
(255.78mm)
-0.18"
(-4.57mm)
60th Driest Driest since: 1994 1925
69th Wettest Wettest since: 1998 2019
Jan–May 1999
5-Month
13.02"
(330.71mm)
12.39"
(314.71mm)
0.63"
(16.00mm)
91st Driest Driest since: 1996 1934
38th Wettest Wettest since: 1998 2019
Dec 1998–May 1999
6-Month
15.10"
(383.54mm)
14.73"
(374.14mm)
0.37"
(9.40mm)
74th Driest Driest since: 1996 1931
54th Wettest Wettest since: 1998 2019
Nov 1998–May 1999
7-Month
17.73"
(450.34mm)
16.96"
(430.78mm)
0.77"
(19.56mm)
90th Driest Driest since: 1996 1934
38th Wettest Wettest since: 1998 1983
Oct 1998–May 1999
8-Month
20.70"
(525.78mm)
19.13"
(485.90mm)
1.57"
(39.88mm)
101st Driest Driest since: 1996 1934
27th Wettest Wettest since: 1998 2019
Sep 1998–May 1999
9-Month
23.21"
(589.53mm)
21.62"
(549.15mm)
1.59"
(40.38mm)
104th Driest Driest since: 1996 1934
24th Wettest Wettest since: 1998 2019
Ties: 1919, 1987
Aug 1998–May 1999
10-Month
25.63"
(651.00mm)
24.25"
(615.95mm)
1.38"
(35.05mm)
97th Driest Driest since: 1996 1918
31st Wettest Wettest since: 1998 2019
Jul 1998–May 1999
11-Month
28.49"
(723.65mm)
27.03"
(686.56mm)
1.46"
(37.09mm)
95th Driest Driest since: 1996 1931
33rd Wettest Wettest since: 1998 2019
Jun 1998–May 1999
12-Month
31.81"
(807.97mm)
29.95"
(760.73mm)
1.86"
(47.24mm)
98th Driest Driest since: 1996 1934
30th Wettest Wettest since: 1998 2019
Ties: 1987
Dec 1997–May 1999
18-Month
49.22"
(1,250.19mm)
44.70"
(1,135.38mm)
4.52"
(114.81mm)
116th Driest Driest since: 1996 1931
11th Wettest Wettest since: 1998 2019
Jun 1997–May 1999
24-Month
65.36"
(1,660.14mm)
59.92"
(1,521.97mm)
5.44"
(138.17mm)
117th Driest Driest since: 1997 1931
10th Wettest Wettest since: 1998 2020
Jun 1996–May 1999
36-Month
99.64"
(2,530.86mm)
89.88"
(2,282.95mm)
9.76"
(247.91mm)
120th Driest Driest since: 1998 1955
6th Wettest Wettest since: 1984 2019
Jun 1995–May 1999
48-Month
130.46"
(3,313.68mm)
119.78"
(3,042.41mm)
10.68"
(271.27mm)
119th Driest Driest since: 1997 1956
6th Wettest Wettest since: 1998 2019
Jun 1994–May 1999
60-Month
163.78"
(4,160.01mm)
149.64"
(3,800.86mm)
14.14"
(359.15mm)
121st Driest Driest since: 1998 1957
3rd Wettest Wettest to Date 2020

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: National Time Series, Precipitation, published September 2022, retrieved on September 28, 2022 from https://www.ncdc.noaa.gov/cag/