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USGS Daily Statistics for Oregon

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 14038530 JOHN DAY RIVER NEAR JOHN DAY, OR


Grant County, Oregon
Hydrologic Unit Code 17070201
Latitude  44°25'07", Longitude 118°54'19" NAD27
Drainage area 386  square miles
Gage datum 3,130.56 feet above NGVD29
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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 1968-10-01 -> 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
1 178 213 244 310 388 453 164 50 37 79 104 130
2 175 187 250 309 388 442 163 48 35 86 104 137
3 179 184 243 305 400 448 157 46 35 88 105 136
4 172 185 253 308 403 456 142 45 35 90 105 135
5 168 188 255 308 421 460 135 45 36 89 109 132
6 167 183 290 317 438 439 132 44 36 88 111 135
7 164 189 289 325 458 423 130 43 36 90 110 137
8 164 180 280 344 443 405 123 43 38 90 112 143
9 171 185 290 365 432 392 116 41 40 90 112 142
10 168 185 292 346 436 374 112 39 41 92 114 152
11 170 189 286 347 419 341 108 38 41 94 114 144
12 166 205 277 342 414 335 102 36 43 93 121 141
13 176 250 284 339 419 324 97 36 47 92 119 145
14 177 234 297 346 439 323 92 35 46 92 119 149
15 183 243 302 348 480 309 89 35 47 93 117 159
16 214 259 321 347 509 301 86 36 49 94 118 143
17 255 243 323 349 497 283 84 34 51 93 124 142
18 262 252 318 350 498 276 81 33 54 94 129 142
19 237 252 317 352 526 268 79 32 55 95 130 144
20 229 236 304 357 531 260 75 32 58 96 125 142
21 222 226 308 364 506 246 72 32 59 95 123 157
22 234 250 312 367 490 230 70 34 60 97 128 163
23 204 286 321 378 483 215 68 36 61 99 127 144
24 218 263 324 388 469 208 66 36 64 100 133 149
25 208 240 312 385 477 205 62 34 66 100 133 154
26 222 226 319 381 477 195 59 33 68 102 131 163
27 204 219 312 384 464 191 58 32 68 101 128 165
28 193 238 302 388 471 184 55 32 69 102 129 163
29 193 244 301 384 480 179 53 31 71 105 134 180
30 192   314 388 477 167 52 32 75 104 130 181
31 227   302   476   51 45   103   185