NOAA's National Centers for Environmental Information
National Rankings
Contiguous U.S.
September 1999 Precipitation Rankings
| Period | Value | 1901-2000 Mean | Anomaly | Rank (1895-2025) | Driest/Wettest Since | Record |
|---|---|---|---|---|---|---|
| September 1999 1-Month | 2.52in (64.01mm) | 2.49in (63.25mm) | 0.03in | 73rd Driest | Driest since: | 1956 |
| 58th Wettest | Wettest since: | 1986 | ||||
| Aug– 2-Month | 4.81in (122.17mm) | 5.10in (129.54mm) | -0.29in | 36th Driest | Driest since: | 1956 |
| 95th Wettest | Wettest since: | 1977 | ||||
| Jul– 3-Month | 7.39in (187.71mm) | 7.88in (200.15mm) | -0.49in | 29th Driest | Driest since: | 1930 |
| 102nd Wettest | Wettest since: | 1915 | ||||
| Jun– 4-Month | 10.70in (271.78mm) | 10.80in (274.32mm) | -0.10in | 58th Driest | Driest since: | 1930 |
| 73rd Wettest | Wettest since: | 1915 | ||||
| May– 5-Month | 13.61in (345.69mm) | 13.71in (348.23mm) | -0.10in | 55th Driest | Driest since: | 1956 |
| 76th Wettest | Wettest since: | 1915 | ||||
| Apr– 6-Month | 16.48in (418.59mm) | 16.23in (412.24mm) | 0.25in | 72nd Driest | Driest since: | 1956 |
| 59th Wettest | Wettest since: | 1915 | ||||
| Mar– 7-Month | 18.67in (474.22mm) | 18.74in (476.00mm) | -0.07in | 57th Driest | Driest since: | 1956 |
| 74th Wettest | Wettest since: | 1973 | ||||
| Feb– 8-Month | 20.59in (522.99mm) | 20.87in (530.10mm) | -0.28in | 55th Driest | Driest since: | 1930 |
| 76th Wettest | Wettest since: | 2019 | ||||
| Jan– 9-Month | 23.72in (602.49mm) | 23.18in (588.77mm) | 0.54in | 79th Driest | Driest since: | 1934 |
| 52nd Wettest | Wettest since: | 2019 | ||||
| Dec 1998– 10-Month | 25.80in (655.32mm) | 25.53in (648.46mm) | 0.27in | 66th Driest | Driest since: | 1931 |
| 64th Wettest | Wettest since: | 2019 | ||||
| Nov 1998– 11-Month | 28.43in (722.12mm) | 27.76in (705.10mm) | 0.67in | 76th Driest | Driest since: | 1934 |
| 54th Wettest | Wettest since: | 2019 | ||||
| Oct 1998– 12-Month | 31.40in (797.56mm) | 29.92in (759.97mm) | 1.48in | 91st Driest | Driest since: | 1934 |
| 39th Wettest | Wettest since: | 2019 | ||||
| Apr 1998– 18-Month | 47.68in (1,211.07mm) | 46.17in | 1.51in | 88th Driest | Driest since: | 1931 |
| 42nd Wettest | Wettest since: | 2019 | ||||
| Oct 1997– 24-Month | 64.67in (1,642.62mm) | 59.89in | 4.78in | 115th Driest | Driest since: | 1918 |
| 14th Wettest | Wettest since: | 2020 | ||||
| Oct 1996– 36-Month | 98.16in (2,493.26mm) | 89.82in | 8.34in | 118th Driest | Driest since: | 1956 |
| 10th Wettest | Wettest since: | 2019 | ||||
| Oct 1995– 48-Month | 130.31in (3,309.87mm) | 119.72in | 10.59in | 121st Driest | Driest since: | 1956 |
| 6th Wettest | Wettest since: | 2019 | ||||
| Oct 1994– 60-Month | 163.68in (4,157.47mm) | 149.58in | 14.10in | 123rd Driest | Driest since: | 1956 |
| 3rd Wettest | Wettest to Date | 2020 |
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published March 2025, retrieved on March 29, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings
