NOAA's National Centers for Environmental Information
Divisional Rankings
Iowa, Climate Division 4
December 2019 Palmer Z-Index Rankings
| Period | Value | 1901-2000 Mean | Anomaly | Rank (1895-2025) | Driest/Wettest Since | Record |
|---|---|---|---|---|---|---|
| December 2019 1-Month | 1.48 | 0.05 | 1.43 | 112th Driest | Driest since: | 1976 |
| 19th Wettest | Wettest since: | 2015 | ||||
| Nov– 2-Month | 1.34 | 0.10 | 1.24 | 109th Driest | Driest since: | 1976 |
| 22nd Wettest | Wettest since: | 2015 | ||||
| Oct– 3-Month | 2.28 | 0.11 | 2.17 | 121st Driest | Driest since: | 1955 |
| 10th Wettest | Wettest since: | 2015 | ||||
| Sep– 4-Month | 2.24 | 0.14 | 2.10 | 120th Driest | Driest since: | 1939 |
| 11th Wettest | Wettest since: | 2015 | ||||
| Aug– 5-Month | 1.84 | 0.12 | 1.72 | 117th Driest | Driest since: | 1976 |
| 14th Wettest | Wettest since: | 2015 | ||||
| Jul– 6-Month | 1.49 | 0.13 | 1.36 | 109th Driest | Driest since: | 1976 |
| 22nd Wettest | Wettest since: | 2015 | ||||
| Ties: 1961 | ||||||
| Jun– 7-Month | 1.05 | 0.13 | 0.92 | 107th Driest | Driest since: | 1976 |
| 24th Wettest | Wettest since: | 2015 | ||||
| Ties: 1926, 1965 | ||||||
| May– 8-Month | 1.44 | 0.13 | 1.31 | 111th Driest | Driest since: | 1936 |
| 20th Wettest | Wettest since: | 2015 | ||||
| Apr– 9-Month | 1.17 | 0.13 | 1.04 | 108th Driest | Driest since: | 1934 |
| 23rd Wettest | Wettest since: | 2015 | ||||
| Mar– 10-Month | 1.18 | 0.10 | 1.08 | 108th Driest | Driest since: | 1934 |
| 23rd Wettest | Wettest since: | 2015 | ||||
| Feb– 11-Month | 1.27 | 0.11 | 1.16 | 111th Driest | Driest since: | 1934 |
| 20th Wettest | Wettest since: | 2015 | ||||
| Ties: 1965 | ||||||
| Jan– 12-Month | 1.14 | 0.11 | 1.03 | 109th Driest | Driest since: | 1934 |
| 22nd Wettest | Wettest since: | 2015 | ||||
| Jul 2018– 18-Month | 1.57 | 0.13 | 1.44 | 123rd Driest | Driest since: | 1956 |
| 7th Wettest | Wettest since: | 2015 | ||||
| Jan 2018– 24-Month | 1.40 | 0.12 | 1.28 | 123rd Driest | Driest since: | 1934 |
| 7th Wettest | Wettest since: | 2015 | ||||
| Jan 2017– 36-Month | 1.15 | 0.12 | 1.03 | 123rd Driest | Driest since: | 1936 |
| 6th Wettest | Wettest since: | 2009 | ||||
| Jan 2016– 48-Month | 1.00 | 0.12 | 0.88 | 122nd Driest | Driest since: | 1936 |
| 6th Wettest | Wettest since: | 2010 | ||||
| Jan 2015– 60-Month | 1.23 | 0.11 | 1.12 | 125th Driest | Driest since: | 1937 |
| 2nd Wettest | Wettest since: | 2018 | ||||
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 31, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings
