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 October 2020. For more information, please see Climatological Rankings.


Contiguous U.S.

Precipitation Rankings, May 1940

View Period (Months):All1234567891011121824364860
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Wettest/Driest
Since
Record
May 1940
1-Month
2.22"
(56.39mm)
2.91"
(73.91mm)
-0.69"
(-17.52mm)
8th Driest Driest since: 1939 1934
119th Wettest Wettest since: 1938 2019
Apr–May 1940
2-Month
5.26"
(133.60mm)
5.43"
(137.92mm)
-0.17"
(-4.32mm)
55th Driest Driest since: 1939 1934
72nd Wettest Wettest since: 1938 1957
Ties: 1928, 1969
Mar–May 1940
3-Month
7.53"
(191.26mm)
7.94"
(201.68mm)
-0.41"
(-10.42mm)
42nd Driest Driest since: 1939 1925
85th Wettest Wettest since: 1938 1957, 1991
Ties: 1909
Feb–May 1940
4-Month
10.51"
(266.95mm)
10.07"
(255.78mm)
0.44"
(11.17mm)
85th Driest Driest since: 1939 1925
42nd Wettest Wettest since: 1938 2019
Jan–May 1940
5-Month
12.44"
(315.98mm)
12.39"
(314.71mm)
0.05"
(1.27mm)
70th Driest Driest since: 1939 1934
57th Wettest Wettest since: 1938 2019
Dec 1939–May 1940
6-Month
14.32"
(363.73mm)
14.73"
(374.14mm)
-0.41"
(-10.41mm)
49th Driest Driest since: 1939 1931
77th Wettest Wettest since: 1938 2019
Nov 1939–May 1940
7-Month
15.31"
(388.87mm)
16.96"
(430.78mm)
-1.65"
(-41.91mm)
13th Driest Driest since: 1934 1934
113th Wettest Wettest since: 1939 1983
Oct 1939–May 1940
8-Month
16.91"
(429.51mm)
19.13"
(485.90mm)
-2.22"
(-56.39mm)
13th Driest Driest since: 1939 1934
113th Wettest Wettest since: 1938 2019
Sep 1939–May 1940
9-Month
18.53"
(470.66mm)
21.62"
(549.15mm)
-3.09"
(-78.49mm)
6th Driest Driest since: 1934 1934
120th Wettest Wettest since: 1939 2019
Aug 1939–May 1940
10-Month
21.24"
(539.50mm)
24.25"
(615.95mm)
-3.01"
(-76.45mm)
9th Driest Driest since: 1934 1918
117th Wettest Wettest since: 1939 2019
Ties: 2000
Jul 1939–May 1940
11-Month
23.60"
(599.44mm)
27.03"
(686.56mm)
-3.43"
(-87.12mm)
7th Driest Driest since: 1934 1931
119th Wettest Wettest since: 1939 2019
Ties: 1911
Jun 1939–May 1940
12-Month
26.92"
(683.77mm)
29.95"
(760.73mm)
-3.03"
(-76.96mm)
10th Driest Driest since: 1934 1934
116th Wettest Wettest since: 1939 2019
Dec 1938–May 1940
18-Month
40.48"
(1,028.19mm)
44.70"
(1,135.38mm)
-4.22"
(-107.19mm)
9th Driest Driest since: 1934 1931
116th Wettest Wettest since: 1939 2019
Jun 1938–May 1940
24-Month
54.76"
(1,390.90mm)
59.92"
(1,521.97mm)
-5.16"
(-131.07mm)
10th Driest Driest since: 1935 1931
115th Wettest Wettest since: 1939 2020
Jun 1937–May 1940
36-Month
85.99"
(2,184.15mm)
89.88"
(2,282.95mm)
-3.89"
(-98.80mm)
21st Driest Driest since: 1936 1955
103rd Wettest Wettest since: 1939 2019
Jun 1936–May 1940
48-Month
114.45"
(2,907.03mm)
119.78"
(3,042.41mm)
-5.33"
(-135.38mm)
14th Driest Driest since: 1937 1956
109th Wettest Wettest since: 1939 2019
Jun 1935–May 1940
60-Month
142.49"
(3,619.25mm)
149.64"
(3,800.86mm)
-7.15"
(-181.61mm)
10th Driest Driest since: 1938 1957
112th Wettest Wettest since: 1939 2020

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: National Time Series, published November 2020, retrieved on November 25, 2020 from https://www.ncdc.noaa.gov/cag/