NOAA's National Centers for Environmental Information
Divisional Mapping
Divisional Palmer Z-Index Rank (130 years)
October - December 1920
Driest⇣⅒⇣ ⅓Near Normal⇡ ⅓⇡⅒Wettest
Illinois (Hover over a Climate Division)
Z-IndexPalmer Z-Index:
Anomaly:
Rank:
Mean:
Climate Division | Value | Anomaly | Rank 130 Years | 1901- |
|---|---|---|---|---|
| 1. Northwest | -2.04 | -2.01 | 12 | -0.03 |
| 2. Northeast | -2.18 | -2.12 | 11 | -0.06 |
| 3. West | -2.13 | -2.01 | 10 | -0.12 |
| 4. Central | -2.03 | -1.98 | 7 | -0.05 |
| 5. East | -2.44 | -2.37 | 10 | -0.07 |
| 6. West Southwest | -1.59 | -1.54 | 13 | -0.05 |
| 7. East Southeast | -1.46 | -1.41 | 16 | -0.05 |
| 8. Southwest | -1.66 | -1.60 | 14 | -0.06 |
| 9. Southeast | -0.86 | -0.84 | 33 | -0.02 |
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published June 2025, retrieved on June 26, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping
