| Station: | Washington, D.C. | Continent: | North America | ||
| River: | Potomac | Major Basin : | Atlantic Ocean | ||
| Country: | United States | Discharge into : | Atlantic Ocean | ||
| Observation Period: | 1930 - 1984 | Total Months: | 658 | ||
| Latitude (dec deg): | 38.96 N | Area (km2): | 29940 | ||
| Longitude (dec deg): | 77.15 W | Elevation (m): | 12 | ||
| Annual Discharge: (m3/s): | 311.4 | (km3/yr): | 9.8 | ||
| Annual Runoff: (l/s/km2): | 10.4 | (mm/yr): | 328.2 |
| Mean for Observation Period | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| m3/sec | 368.7 | 482.5 | 645.0 | 566.5 | 397.2 | 253.7 | 133.1 | 138.4 | 120.2 | 175.7 | 184.2 | 287.0 |
| km3/mo | 1.0 | 1.2 | 1.7 | 1.5 | 1.1 | 0.7 | 0.4 | 0.4 | 0.3 | 0.5 | 0.5 | 0.8 |
| mm/mo | 33.0 | 39.0 | 57.7 | 49.0 | 35.5 | 22.0 | 11.9 | 12.4 | 10.4 | 15.7 | 15.9 | 25.7 |
| l/s/km2 | 12.3 | 16.1 | 21.5 | 18.9 | 13.3 | 8.5 | 4.4 | 4.6 | 4.0 | 5.9 | 6.2 | 9.6 |
