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USGS Daily Statistics for Virginia

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The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 02056000 ROANOKE RIVER AT NIAGARA, VA


Roanoke County, Virginia
Hydrologic Unit Code 03010101
Latitude  37°15'18", Longitude  79°52'18" NAD27
Drainage area 509  square miles
Gage datum 819.7 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1926-10-01 -> 2025-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 595 611 907 916 610 500 304 279 358 456 319 580
2 563 674 776 830 656 466 333 259 271 513 347 508
3 622 732 756 791 676 462 367 258 249 336 362 478
4 681 877 917 785 653 448 477 354 259 328 519 586
5 522 740 915 925 687 521 392 330 281 306 438 531
6 516 755 888 792 706 453 350 305 557 272 346 429
7 536 830 892 814 703 433 347 274 420 275 360 493
8 611 719 764 832 661 441 330 273 398 359 354 522
9 615 681 718 881 605 518 296 303 267 371 333 496
10 602 657 735 955 560 487 337 288 279 315 388 469
11 545 739 715 837 554 474 321 314 257 401 375 494
12 587 696 731 760 540 449 344 324 245 359 617 481
13 516 827 815 901 557 449 327 290 239 318 454 472
14 536 943 865 937 545 432 330 406 231 276 371 488
15 630 828 809 822 592 444 316 437 213 319 345 504
16 586 887 739 1,010 608 448 319 550 316 302 429 519
17 505 843 900 859 565 577 330 459 385 431 365 469
18 532 841 951 776 608 540 276 489 485 367 359 482
19 742 838 923 704 628 447 273 399 402 495 410 432
20 711 775 908 809 654 448 262 310 372 401 388 415
21 639 784 1,040 725 742 600 270 286 288 345 327 449
22 650 901 917 762 717 510 286 292 430 389 317 493
23 769 1,000 869 642 569 401 309 292 398 379 332 487
24 642 944 1,000 784 591 369 292 289 272 363 354 485
25 753 903 904 898 574 320 254 290 247 342 382 520
26 784 833 909 882 502 358 263 302 273 347 382 568
27 664 749 887 823 516 441 294 272 381 359 365 510
28 692 756 971 758 708 377 277 274 530 353 383 541
29 650 693 923 676 622 405 287 277 439 347 551 622
30 621   917 640 642 351 301 258 573 314 449 614
31 701   873   626   271 354   318   579