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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
1 606 378 726 817 690 378 332 173 315 404 304 607
2 648 525 821 1,130 384 424 219 273 497 214 281 524
3 570 787 593 1,000 416 337 170 180 233 226 441 504
4 559 714 662 844 470 389 204 555 187 196 249 478
5 491 561 787 941 426 335 173 263 147 209 242 636
6 421 484 783 756 513 328 219 207 272 200 235 497
7 471 491 857 695 569 321 369 182 365 141 253 598
8 563 561 707 650 479 272 168 176 244 318 401 572
9 603 391 812 605 470 223 181 172 231 293 368 621
10 567 436 809 766 435 257 200 181 176 275 323 511
11 415 521 793 528 455 261 256 190 173 223 284 768
12 523 512 743 499 490 317 306 186 413 215 403 739
13 459 748 789 711 502 426 316 379 375 186 411 655
14 500 597 944 547 520 306 413 229 309 202 394 741
15 455 586 782 728 349 224 282 187 368 214 325 532
16 431 580 647 1,050 508 271 213 162 416 201 368 623
17 379 527 708 692 478 312 186 196 289 224 456 758
18 429 534 664 459 363 200 190 168 427 216 325 743
19 635 589 693 462 418 241 174 175 246 520 310 458
20 703 554 826 503 390 332 149 126 283 339 433 405
21 554 586 937 437 325 365 207 132 183 292 349 863
22 474 564 1,120 425 300 419 220 312 293 209 358 521
23 464 639 963 441 332 307 298 243 303 234 563 532
24 756 924 837 429 456 252 257 158 342 245 339 562
25 955 1,070 779 496 357 297 235 132 262 244 472 795
26 969 803 650 483 342 235 194 123 216 235 538 583
27 696 639 767 554 422 248 259 119 404 390 534 519
28 643 737 700 536 333 372 397 589 393 459 698 626
29 508 550 745 496 545 266 273 184 443 385 555 544
30 443   708 593 585 218 219 151 230 405 613 436
31 478   773   444   190 153   298   423