NOAA's National Centers for Environmental Information
Divisional Rankings
Oregon, Climate Division 1
December 2018 Palmer Z-Index Rankings
| Period | Value | 1901-2000 Mean | Anomaly | Rank (1895-2025) | Driest/Wettest Since | Record |
|---|---|---|---|---|---|---|
| December 2018 1-Month | -0.76 | -0.20 | -0.56 | 53rd Driest | Driest since: | 2013 |
| 78th Wettest | Wettest since: | 2015 | ||||
| Nov– 2-Month | -0.84 | -0.04 | -0.80 | 36th Driest | Driest since: | 2013 |
| 95th Wettest | Wettest since: | 1973 | ||||
| Ties: 1922 | ||||||
| Oct– 3-Month | -0.96 | -0.11 | -0.85 | 24th Driest | Driest since: | 2013 |
| 107th Wettest | Wettest since: | 2016 | ||||
| Sep– 4-Month | -1.10 | -0.05 | -1.05 | 16th Driest | Driest since: | 1976 |
| 115th Wettest | Wettest since: | 1973 | ||||
| Aug– 5-Month | -1.35 | -0.07 | -1.28 | 4th Driest | Driest since: | 1936 |
| 127th Wettest | Wettest since: | 1968 | ||||
| Jul– 6-Month | -1.66 | -0.07 | -1.59 | 1st Driest | Driest to Date | 2018 |
| 130th Wettest | Wettest since: | 1920 | ||||
| Jun– 7-Month | -1.72 | -0.06 | -1.66 | 1st Driest | Driest to Date | 2018 |
| 130th Wettest | Wettest since: | 1920 | ||||
| May– 8-Month | -1.93 | -0.05 | -1.88 | 1st Driest | Driest to Date | 2018 |
| 130th Wettest | Wettest since: | 1968 | ||||
| Apr– 9-Month | -1.43 | -0.03 | -1.40 | 2nd Driest | Driest since: | 1938 |
| 129th Wettest | Wettest since: | 1937 | ||||
| Mar– 10-Month | -1.30 | -0.05 | -1.25 | 2nd Driest | Driest since: | 1992 |
| 129th Wettest | Wettest since: | 1920, 1937 | ||||
| Feb– 11-Month | -1.39 | -0.04 | -1.35 | 1st Driest | Driest to Date | 2018 |
| 130th Wettest | Wettest since: | 1983 | ||||
| Jan– 12-Month | -1.29 | -0.04 | -1.25 | 2nd Driest | Driest since: | 1992 |
| 129th Wettest | Wettest since: | 1983 | ||||
| Jul 2017– 18-Month | -1.08 | -0.04 | -1.04 | 2nd Driest | Driest since: | 1992 |
| 128th Wettest | Wettest since: | 1983, 1996 | ||||
| Ties: 1939 | ||||||
| Jan 2017– 24-Month | -0.33 | -0.04 | -0.29 | 40th Driest | Driest since: | 1930 |
| 90th Wettest | Wettest since: | 1984 | ||||
| Jan 2016– 36-Month | -0.23 | -0.03 | -0.20 | 46th Driest | Driest since: | 1930 |
| 83rd Wettest | Wettest since: | 1997 | ||||
| Jan 2015– 48-Month | -0.45 | -0.04 | -0.41 | 19th Driest | Driest since: | 1926 |
| 109th Wettest | Wettest since: | 1998 | ||||
| Ties: 1935, 1941, 2005 | ||||||
| Jan 2014– 60-Month | -0.38 | -0.04 | -0.34 | 27th Driest | Driest since: | 1926, 1932 |
| 100th Wettest | Wettest since: | 1999 | ||||
| Ties: 2006, 2008 | ||||||
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 26, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings
