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


Iowa

Precipitation Rankings, September 1977

View Period (Months):All1234567891011121824364860
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Wettest/Driest
Since
Record
September 1977
1-Month
4.69"
(119.13mm)
3.67"
(93.22mm)
1.02"
(25.91mm)
96th Driest Driest since: 1976 1939
32nd Wettest Wettest since: 1973 1965
Aug–Sep 1977
2-Month
12.89"
(327.41mm)
7.51"
(190.75mm)
5.38"
(136.66mm)
124th Driest Driest since: 1976 1976
4th Wettest Wettest since: 1965 2018
Jul–Sep 1977
3-Month
16.88"
(428.75mm)
11.36"
(288.54mm)
5.52"
(140.21mm)
119th Driest Driest since: 1976 2013
9th Wettest Wettest since: 1965 1993
Jun–Sep 1977
4-Month
19.55"
(496.57mm)
16.00"
(406.40mm)
3.55"
(90.17mm)
111th Driest Driest since: 1976 2012
17th Wettest Wettest since: 1965 1993
May–Sep 1977
5-Month
22.32"
(566.93mm)
20.04"
(509.02mm)
2.28"
(57.91mm)
96th Driest Driest since: 1976 1976
32nd Wettest Wettest since: 1973 1993
Apr–Sep 1977
6-Month
24.85"
(631.19mm)
22.99"
(583.95mm)
1.86"
(47.24mm)
89th Driest Driest since: 1976 1988
39th Wettest Wettest since: 1973 1993
Mar–Sep 1977
7-Month
28.75"
(730.25mm)
24.94"
(633.48mm)
3.81"
(96.77mm)
103rd Driest Driest since: 1976 1988
25th Wettest Wettest since: 1973 1993
Feb–Sep 1977
8-Month
29.26"
(743.20mm)
25.96"
(659.38mm)
3.30"
(83.82mm)
99th Driest Driest since: 1976 1988
29th Wettest Wettest since: 1973 1993
Jan–Sep 1977
9-Month
29.76"
(755.90mm)
26.93"
(684.02mm)
2.83"
(71.88mm)
96th Driest Driest since: 1976 1988
32nd Wettest Wettest since: 1973 1993
Dec 1976–Sep 1977
10-Month
30.07"
(763.78mm)
28.04"
(712.22mm)
2.03"
(51.56mm)
83rd Driest Driest since: 1976 1988
44th Wettest Wettest since: 1973 1993
Nov 1976–Sep 1977
11-Month
30.17"
(766.32mm)
29.78"
(756.41mm)
0.39"
(9.91mm)
68th Driest Driest since: 1976 1934
59th Wettest Wettest since: 1974 1993
Oct 1976–Sep 1977
12-Month
31.70"
(805.18mm)
32.09"
(815.09mm)
-0.39"
(-9.91mm)
57th Driest Driest since: 1976 1934
70th Wettest Wettest since: 1974 1993
Ties: 2020
Apr 1976–Sep 1977
18-Month
48.24"
(1,225.30mm)
55.13"
(1,400.30mm)
-6.89"
(-175.00mm)
16th Driest Driest since: 1976 1934
111th Wettest Wettest since: 1975 1993
Oct 1975–Sep 1977
24-Month
57.90"
(1,470.66mm)
64.26"
(1,632.20mm)
-6.36"
(-161.54mm)
21st Driest Driest since: 1976 1956
105th Wettest Wettest since: 1975 1993
Oct 1974–Sep 1977
36-Month
88.86"
(2,257.04mm)
96.36"
(2,447.54mm)
-7.50"
(-190.50mm)
19th Driest Driest since: 1968 1957
106th Wettest Wettest since: 1976 2010
Oct 1973–Sep 1977
48-Month
122.26"
(3,105.40mm)
128.36"
(3,260.34mm)
-6.10"
(-154.94mm)
31st Driest Driest since: 1969 1958
93rd Wettest Wettest since: 1976 2010
Oct 1972–Sep 1977
60-Month
165.44"
(4,202.18mm)
160.34"
(4,072.64mm)
5.10"
(129.54mm)
75th Driest Driest since: 1972 1957
48th Wettest Wettest since: 1976 2010

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published June 2022, retrieved on July 6, 2022 from https://www.ncei.noaa.gov/cag/