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USGS Surface-Water 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 01387400 RAMAPO RIVER AT RAMAPO NY


Rockland County, New York
Hydrologic Unit Code 02030103
Latitude  41°08'25", Longitude  74°10'07" NAD83
Drainage area 86.9  square miles
Gage datum 295.78 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 1978-10-01 -> 2024-09-30)

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
1 203 165 221 380 268 187 72 67 53 102 126 274
2 214 168 239 359 228 178 72 59 127 95 122 301
3 196 198 238 379 206 147 67 69 93 105 179 262
4 201 208 256 387 201 145 68 64 61 101 151 257
5 217 192 251 500 184 140 60 62 51 94 121 237
6 200 171 245 394 225 144 61 54 82 94 120 215
7 180 161 326 295 216 175 77 73 118 82 109 219
8 167 151 281 280 183 176 71 63 130 93 109 231
9 161 141 302 266 173 139 89 52 123 142 140 196
10 153 136 273 325 187 120 104 59 85 93 135 196
11 170 142 352 267 231 106 79 59 65 72 135 229
12 189 158 319 228 263 102 66 65 56 105 175 287
13 188 176 329 236 224 112 85 59 64 159 165 299
14 192 183 396 234 208 131 111 57 79 137 146 293
15 200 178 339 243 175 120 97 63 62 134 145 244
16 175 184 298 392 173 107 92 74 118 103 146 219
17 161 186 275 440 253 109 82 59 172 93 183 239
18 171 193 285 316 217 108 70 52 145 85 174 255
19 225 201 327 260 218 106 60 48 131 94 144 207
20 249 213 311 238 187 90 50 43 94 180 166 179
21 207 235 337 220 155 86 47 56 75 167 201 225
22 169 230 493 228 139 98 48 90 65 120 174 236
23 161 216 418 234 132 101 55 115 64 97 199 227
24 212 238 341 231 147 99 61 79 77 112 184 288
25 257 280 308 228 138 85 51 57 87 111 189 322
26 275 264 279 221 125 72 58 51 94 135 194 268
27 257 233 297 221 125 71 63 44 89 162 238 244
28 250 229 326 207 118 86 56 223 110 206 243 222
29 201 270 368 220 146 77 47 160 126 204 270 204
30 188   369 220 214 74 42 83 114 183 256 207
31 181   379   184   50 54   142   210