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USGS Daily Statistics for New Hampshire

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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 01137500 AMMONOOSUC RIVER AT BETHLEHEM JUNCTION, NH


Grafton County, New Hampshire
Hydrologic Unit Code 01080101
Latitude  44°16'07", Longitude  71°37'51" NAD27
Drainage area 87.6  square miles
Gage datum 1,180.48 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 1938-10-01 -> 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
1 150 96 99 423 684 302 174 104 99 158 221 233
2 148 96 112 383 685 309 171 109 94 158 219 227
3 141 120 107 404 705 298 137 136 83 129 275 206
4 120 120 113 398 662 246 136 125 81 132 214 182
5 123 108 131 416 613 228 140 139 74 117 220 191
6 133 97 158 391 582 236 136 137 83 145 224 184
7 120 90 176 393 553 221 122 109 88 152 231 225
8 118 99 138 387 543 218 114 102 86 145 245 187
9 139 91 146 364 616 210 119 101 83 150 256 191
10 136 85 165 375 575 212 120 132 83 136 209 186
11 145 118 167 404 540 221 127 134 125 131 224 222
12 160 125 151 442 592 210 123 113 109 120 260 235
13 149 104 147 422 543 198 116 103 101 126 224 223
14 145 93 164 525 515 210 126 126 97 147 201 195
15 123 83 173 542 501 217 130 98 99 170 222 174
16 116 85 169 559 532 204 121 106 94 204 220 159
17 114 94 211 594 556 200 108 112 129 198 227 171
18 113 90 215 567 487 174 104 96 98 163 195 262
19 147 93 183 548 493 172 123 94 108 159 179 170
20 140 102 200 605 491 155 118 94 103 171 213 147
21 119 131 200 640 431 151 114 90 87 237 211 240
22 118 146 204 633 402 152 120 90 103 223 198 205
23 122 140 202 711 359 152 117 84 114 169 187 196
24 153 130 201 688 350 155 123 83 114 245 176 193
25 170 163 215 637 347 174 107 81 115 213 212 224
26 162 144 241 644 345 188 99 76 101 219 263 178
27 187 113 324 666 331 177 93 69 110 212 242 192
28 139 112 316 641 314 168 95 108 126 242 234 175
29 108 136 331 677 299 165 109 102 113 208 240 159
30 98   343 623 308 220 117 90 144 253 241 171
31 114   394   294   101 101   203   162