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USGS Daily Statistics for the Nation

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 01094000 SOUHEGAN RIVER AT MERRIMACK, NH


Hillsborough County, New Hampshire
Hydrologic Unit Code 01070002
Latitude  42°51'27", Longitude  71°30'24" NAD27
Drainage area 171  square miles
Gage datum 159.88 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 1908-10-01 -> 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
1 290 265 391 924 550 264 168 107 92 128 208 308
2 292 250 394 1,020 518 270 163 103 88 103 193 299
3 287 253 387 1,040 488 255 171 95 85 96 201 290
4 291 278 379 1,010 483 257 155 88 82 86 270 285
5 273 291 374 962 486 237 142 125 70 94 255 303
6 265 276 400 957 481 230 135 108 64 87 214 334
7 282 266 458 967 419 238 125 97 82 99 200 365
8 281 280 488 935 395 243 111 94 90 100 220 351
9 279 271 531 821 398 233 133 100 88 98 226 341
10 329 237 540 766 409 264 134 99 87 92 238 350
11 319 246 467 749 396 262 120 95 81 86 258 370
12 304 261 480 758 389 233 110 96 116 93 221 379
13 318 254 556 831 395 230 112 94 117 93 237 363
14 314 267 578 773 412 224 103 95 95 89 291 333
15 299 281 641 731 427 229 97 88 103 115 268 394
16 290 286 654 752 429 224 91 79 86 184 233 329
17 278 281 643 809 422 206 97 75 90 150 234 291
18 252 281 687 744 410 228 92 75 105 148 237 300
19 268 292 795 701 380 204 102 74 119 144 230 346
20 263 267 693 644 364 203 102 78 111 152 245 303
21 246 267 692 615 348 187 95 70 154 146 249 301
22 262 294 709 588 356 202 98 65 169 129 231 317
23 291 321 680 605 360 189 103 73 105 123 243 302
24 304 315 685 619 344 186 112 80 89 138 238 334
25 323 351 712 583 323 234 113 76 86 178 258 329
26 365 405 761 548 322 218 94 72 90 188 286 330
27 359 397 804 572 323 183 87 78 111 172 299 333
28 356 385 880 550 304 170 104 70 102 168 276 329
29 315 347 847 580 294 180 111 88 92 179 309 310
30 279   875 560 267 179 131 84 103 197 305 297
31 267   898   239   119 81   225   295