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USGS Daily Statistics for Pennsylvania

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[!] Over the next year, the USGS Pennsylvania Water Science Center will be updating the geodetic vertical elevation (gage datum) for many locations. Click HERE for additional information including a current list of streamgages with upcoming datum changes. This update in gage datum does not affect the location of the streamgage, nor the observed local gage height or discharge recorded at the streamgage.


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 01473000 Perkiomen Creek at Graterford, PA


Montgomery County, Pennsylvania
Hydrologic Unit Code 02040203
Latitude  40°13'46", Longitude  75°27'07" NAD27
Drainage area 279  square miles
Gage datum 112.66 feet above NGVD29
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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 1956-10-01 -> 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
1 606 378 718 852 681 392 332 173 315 404 304 607
2 648 525 812 1,120 380 428 219 273 497 214 281 524
3 570 787 587 995 411 339 170 180 233 226 441 504
4 559 714 655 850 470 388 204 555 187 196 249 478
5 491 561 778 938 426 334 173 263 147 209 242 636
6 421 484 791 786 510 327 219 207 272 200 235 497
7 471 491 852 703 566 325 369 182 365 141 253 598
8 563 561 702 653 475 273 168 176 244 318 401 572
9 603 391 804 604 493 225 181 172 231 293 368 621
10 567 436 801 761 444 264 200 181 176 275 323 511
11 415 516 784 526 455 264 256 190 173 223 284 768
12 523 507 735 536 487 317 306 186 413 215 403 739
13 459 741 780 718 498 426 316 379 375 186 411 655
14 500 596 932 548 572 306 413 229 309 202 394 741
15 455 582 773 724 371 224 282 187 368 214 325 532
16 431 608 639 1,040 567 271 213 162 416 201 368 623
17 379 551 705 687 499 312 186 196 289 224 456 758
18 429 534 660 456 369 200 190 168 427 216 325 743
19 635 585 687 458 418 241 174 175 246 520 310 458
20 703 550 817 499 390 332 149 126 283 339 433 405
21 554 580 932 434 325 365 207 132 183 292 349 863
22 474 558 1,110 422 309 419 220 312 293 209 358 521
23 464 632 953 437 347 307 298 243 303 234 563 532
24 756 913 828 425 458 252 257 158 342 245 339 562
25 955 1,060 772 491 358 297 235 132 262 244 472 795
26 969 793 644 479 342 235 194 123 216 235 538 583
27 696 632 759 549 419 248 259 119 404 390 534 519
28 643 729 692 531 332 372 397 589 393 459 698 626
29 508 550 737 491 546 266 273 184 443 385 555 544
30 443   700 586 582 218 219 151 230 405 613 436
31 478   765   509   190 153   298   423