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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 01387420 RAMAPO RIVER AT SUFFERN NY


Rockland County, New York
Hydrologic Unit Code 02030103
Latitude  41°07'06", Longitude  74°09'37" NAD83
Drainage area 93.0  square miles
Gage datum 263.29 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 -> 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
1 218 179 233 395 272 181 68 65 54 103 127 276
2 227 182 251 375 227 173 67 61 133 98 123 305
3 208 216 253 413 211 144 63 73 91 104 184 269
4 216 225 268 436 209 142 63 66 59 100 154 263
5 236 205 262 550 190 135 55 60 50 96 121 241
6 214 181 263 428 236 141 60 53 86 94 123 220
7 192 168 356 311 225 172 79 77 118 82 110 222
8 179 157 305 294 188 172 70 64 135 98 112 234
9 174 145 329 274 179 135 86 57 124 147 143 199
10 227 141 316 337 192 116 98 66 85 93 137 201
11 211 150 387 280 241 101 72 63 61 72 139 253
12 208 166 340 250 271 98 60 67 52 109 187 322
13 215 187 350 260 229 111 86 58 61 166 169 325
14 211 192 412 244 214 132 110 56 78 140 147 308
15 210 186 357 259 179 121 92 61 60 135 146 256
16 186 192 313 412 180 106 88 73 120 101 149 232
17 172 189 290 455 270 107 76 57 184 91 186 251
18 183 199 299 331 227 105 66 50 142 84 176 350
19 229 209 347 275 226 103 55 45 127 94 146 284
20 268 222 324 253 196 85 45 39 95 186 167 214
21 217 247 346 232 162 81 42 50 76 172 208 252
22 178 239 506 236 143 92 44 84 64 122 185 258
23 171 224 440 239 138 101 51 119 65 99 214 247
24 223 249 377 237 153 98 55 77 75 115 193 303
25 279 295 329 235 142 83 47 54 85 110 191 331
26 297 275 294 227 126 68 53 48 91 130 199 276
27 278 241 311 224 125 67 61 41 91 159 247 259
28 274 238 346 213 117 81 52 246 112 207 257 257
29 231 280 384 228 146 71 42 166 123 204 278 236
30 210   383 229 212 67 38 82 110 182 260 228
31 199   392   183   47 53   143   225