Statewide Rankings

Statewide Data Info
Please note, Degree Days and Palmer Indices are not available for Alaska. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Iowa

Precipitation Rankings, January 1977

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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
January 1977
1-Month 		0.50"
(12.70mm)		 0.98"
(24.89mm)		 -0.48"
(-12.19mm)		 25th Driest
Driest since:
 1981
104th Wettest
Wettest since:
 1949
Ties: 1900, 1931
Dec 1976–Jan 1977
2-Month 		0.81"
(20.57mm)		 2.08"
(52.83mm)		 -1.27"
(-32.26mm)		 3rd Driest
Driest since:
 2003
125th Wettest
Wettest since:
 2016
Nov 1976–Jan 1977
3-Month 		0.91"
(23.11mm)		 3.82"
(97.03mm)		 -2.91"
(-73.92mm)		 2nd Driest
Driest since:
 2003
126th Wettest
Wettest since:
 1932
Oct 1976–Jan 1977
4-Month 		2.44"
(61.98mm)		 6.13"
(155.70mm)		 -3.69"
(-93.72mm)		 2nd Driest
Driest since:
 1911
126th Wettest
Wettest since:
 1932
Sep 1976–Jan 1977
5-Month 		3.91"
(99.31mm)		 9.83"
(249.68mm)		 -5.92"
(-150.37mm)		 1st Driest
Driest since:
 1977
127th Wettest
Wettest since:
 1932
Aug 1976–Jan 1977
6-Month 		5.39"
(136.91mm)		 13.69"
(347.73mm)		 -8.30"
(-210.82mm)		 1st Driest
Driest since:
 1977
127th Wettest
Wettest since:
 2019
Jul 1976–Jan 1977
7-Month 		7.94"
(201.68mm)		 17.57"
(446.28mm)		 -9.63"
(-244.60mm)		 1st Driest
Driest since:
 1977
127th Wettest
Wettest since:
 2019
Jun 1976–Jan 1977
8-Month 		11.19"
(284.23mm)		 22.18"
(563.37mm)		 -10.99"
(-279.14mm)		 1st Driest
Driest since:
 1977
127th Wettest
Wettest since:
 2019
May 1976–Jan 1977
9-Month 		14.39"
(365.51mm)		 26.22"
(665.99mm)		 -11.83"
(-300.48mm)		 1st Driest
Driest since:
 1977
127th Wettest
Wettest since:
 1994
Apr 1976–Jan 1977
10-Month 		18.98"
(482.09mm)		 29.17"
(740.92mm)		 -10.19"
(-258.83mm)		 2nd Driest
Driest since:
 1911
126th Wettest
Wettest since:
 1994
Mar 1976–Jan 1977
11-Month 		22.39"
(568.71mm)		 31.14"
(790.96mm)		 -8.75"
(-222.25mm)		 4th Driest
Driest since:
 1911
124th Wettest
Wettest since:
 1994
Feb 1976–Jan 1977
12-Month 		23.87"
(606.30mm)		 32.15"
(816.61mm)		 -8.28"
(-210.31mm)		 4th Driest
Driest since:
 1911
124th Wettest
Wettest since:
 1994
Aug 1975–Jan 1977
18-Month 		35.90"
(911.86mm)		 45.86"
(1,164.84mm)		 -9.96"
(-252.98mm)		 3rd Driest
Driest since:
 1957
124th Wettest
Wettest since:
 2020
Feb 1975–Jan 1977
24-Month 		52.64"
(1,337.06mm)		 64.28"
(1,632.71mm)		 -11.64"
(-295.65mm)		 6th Driest
Driest since:
 1990
121st Wettest
Wettest since:
 2020
Feb 1974–Jan 1977
36-Month 		84.94"
(2,157.48mm)		 96.29"
(2,445.77mm)		 -11.35"
(-288.29mm)		 10th Driest
Driest since:
 1958
116th Wettest
Wettest since:
 2011
Feb 1973–Jan 1977
48-Month 		127.34"
(3,234.44mm)		 128.27"
(3,258.06mm)		 -0.93"
(-23.62mm)		 57th Driest
Driest since:
 1959
68th Wettest
Wettest since:
 2011
Ties: 1932
Feb 1972–Jan 1977
60-Month 		165.65"
(4,207.51mm)		 160.30"
(4,071.62mm)		 5.35"
(135.89mm)		 78th Driest
Driest since:
 1957
46th Wettest
Wettest since:
 2011

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