Climatological Rankings
Look up monthly U.S., Statewide, Divisional
, and Regional
Temperature, Precipitation, Degree Days, and Palmer (Drought) rankings for 1-12, 18, 24, 36, 48, 60-month, and Year-to-Date time periods. Data and statistics are as of January 1895.
Please note, Degree Days are not available for Agricultural Belts
Iowa Precipitation Rankings, May 2013
Driest
≤1⁄10
≤1⁄3
Normal
≥1⁄3
≥1⁄10
Wettest
More information on Climatological Rankings
| Period | Amount | 20th Century Average |
Departure | Rank (out of 119 years) |
Record | Wettest/Driest Since |
|---|---|---|---|---|---|---|
| May 2013 1-month period |
8.84" (224.54 mm) |
4.07" (103.38 mm) |
4.77" (121.16 mm) |
119th Driest | 1934 | Driest since: 2012 |
| 1st Wettest | 2013 | Wettest to Date |


