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USGS Daily Statistics for the Nation

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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 01130000 UPPER AMMONOOSUC RIVER NEAR GROVETON, NH


Coos County, New Hampshire
Hydrologic Unit Code 01080101
Latitude  44°37'30", Longitude  71°28'10" NAD27
Drainage area 232  square miles
Gage datum 916.43 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 1939-10-01 -> 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
1 346 245 260 1,090 1,670 656 385 204 197 302 413 466
2 353 235 262 1,080 1,700 649 395 197 190 326 446 444
3 338 236 266 1,020 1,660 664 350 204 177 296 476 418
4 288 250 262 1,000 1,630 612 323 243 172 295 486 399
5 281 246 269 1,040 1,560 521 326 259 167 288 456 380
6 280 227 354 1,110 1,410 505 301 237 174 282 475 392
7 277 214 397 1,150 1,320 503 280 199 171 323 470 420
8 259 208 352 1,100 1,250 470 267 220 175 332 476 408
9 258 204 333 1,060 1,260 460 266 223 172 290 500 364
10 285 203 354 1,100 1,290 452 286 231 176 277 464 370
11 279 216 367 1,130 1,220 448 366 262 196 268 443 416
12 313 236 371 1,200 1,210 478 335 234 245 260 461 435
13 320 225 387 1,290 1,210 499 274 208 222 261 459 411
14 296 206 404 1,430 1,130 493 271 237 225 295 419 409
15 274 202 416 1,550 1,080 492 277 215 219 323 440 385
16 267 214 443 1,660 1,070 486 265 201 196 341 438 371
17 269 210 498 1,650 998 483 256 212 218 340 428 345
18 250 208 570 1,650 985 443 239 211 226 339 410 362
19 262 202 530 1,610 952 389 244 183 213 315 381 389
20 266 194 507 1,680 999 371 246 192 220 307 408 333
21 273 200 528 1,740 935 368 222 180 197 385 443 337
22 256 235 540 1,780 838 378 227 168 193 418 429 422
23 260 274 551 1,860 751 368 225 164 214 368 405 420
24 302 276 548 1,870 696 355 230 169 200 400 402 400
25 329 285 544 1,720 683 342 207 170 194 455 401 389
26 360 299 589 1,660 691 354 201 165 211 391 418 374
27 311 291 714 1,720 721 349 202 153 216 387 496 398
28 279 276 798 1,690 703 361 212 181 223 414 497 405
29 260 310 912 1,660 637 377 220 219 210 387 494 372
30 234   993 1,640 653 395 231 207 237 402 478 374
31 234   1,050   652   210 198   406   372