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.


Illinois

Precipitation Rankings, May 1978

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
May 1978
1-Month
4.86"
(123.44mm)
4.08"
(103.63mm)
0.78"
(19.81mm)
85th Driest Driest since: 1977 1934
41st Wettest Wettest since: 1974 1995
Apr–May 1978
2-Month
8.53"
(216.66mm)
7.80"
(198.12mm)
0.73"
(18.54mm)
85th Driest Driest since: 1977 1934
41st Wettest Wettest since: 1974 1927
Mar–May 1978
3-Month
11.54"
(293.12mm)
10.89"
(276.61mm)
0.65"
(16.51mm)
81st Driest Driest since: 1977 1934
45th Wettest Wettest since: 1975 1927
Feb–May 1978
4-Month
12.21"
(310.13mm)
12.75"
(323.85mm)
-0.54"
(-13.72mm)
52nd Driest Driest since: 1972 1934
74th Wettest Wettest since: 1977 2019
Jan–May 1978
5-Month
13.43"
(341.12mm)
14.87"
(377.70mm)
-1.44"
(-36.58mm)
41st Driest Driest since: 1977 1934
85th Wettest Wettest since: 1976 2019
Dec 1977–May 1978
6-Month
16.08"
(408.43mm)
17.20"
(436.88mm)
-1.12"
(-28.45mm)
43rd Driest Driest since: 1977 1934
82nd Wettest Wettest since: 1976 2019
Nov 1977–May 1978
7-Month
18.68"
(474.47mm)
19.95"
(506.73mm)
-1.27"
(-32.26mm)
41st Driest Driest since: 1977 1934
84th Wettest Wettest since: 1976 2019
Oct 1977–May 1978
8-Month
22.72"
(577.09mm)
22.74"
(577.60mm)
-0.02"
(-0.51mm)
61st Driest Driest since: 1977 1934
64th Wettest Wettest since: 1975 2019
Sep 1977–May 1978
9-Month
27.54"
(699.52mm)
26.24"
(666.50mm)
1.30"
(33.02mm)
76th Driest Driest since: 1977 1934
49th Wettest Wettest since: 1975 1927
Aug 1977–May 1978
10-Month
34.40"
(873.76mm)
29.74"
(755.40mm)
4.66"
(118.36mm)
102nd Driest Driest since: 1977 1934
23rd Wettest Wettest since: 1974 1927
Jul 1977–May 1978
11-Month
38.18"
(969.77mm)
33.37"
(847.60mm)
4.81"
(122.17mm)
97th Driest Driest since: 1977 1934
28th Wettest Wettest since: 1974 1927
Jun 1977–May 1978
12-Month
41.87"
(1,063.50mm)
37.43"
(950.72mm)
4.44"
(112.78mm)
94th Driest Driest since: 1977 1934
31st Wettest Wettest since: 1974 1927
Dec 1976–May 1978
18-Month
55.67"
(1,414.02mm)
54.62"
(1,387.35mm)
1.05"
(26.67mm)
63rd Driest Driest since: 1977 1902
61st Wettest Wettest since: 1976 2009
Jun 1976–May 1978
24-Month
69.86"
(1,774.44mm)
74.85"
(1,901.19mm)
-4.99"
(-126.75mm)
28th Driest Driest since: 1977 1941
96th Wettest Wettest since: 1976 1974
Jun 1975–May 1978
36-Month
106.26"
(2,699.00mm)
112.24"
(2,850.90mm)
-5.98"
(-151.90mm)
25th Driest Driest since: 1977 1902
98th Wettest Wettest since: 1976 2011
Jun 1974–May 1978
48-Month
146.22"
(3,713.99mm)
149.63"
(3,800.60mm)
-3.41"
(-86.61mm)
44th Driest Driest since: 1967 1956
78th Wettest Wettest since: 1977 2011
Jun 1973–May 1978
60-Month
193.84"
(4,923.54mm)
187.07"
(4,751.58mm)
6.77"
(171.96mm)
78th Driest Driest since: 1972 1934
43rd Wettest Wettest since: 1977 2011

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published November 2019, retrieved on November 12, 2019 from https://www.ncdc.noaa.gov/cag/