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USGS Daily Statistics for Colorado

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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 09034250 COLORADO RIVER AT WINDY GAP, NEAR GRANBY, CO.


Grand County, Colorado
Hydrologic Unit Code 14010001
Latitude  40°06'30", Longitude 106°00'13" NAD27
Drainage area 788  square miles
Gage datum 7,790.48 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 1981-10-01 -> 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 78 79 81 179 392 910 820 266 145 120 112 88
2 78 78 81 190 404 945 806 249 130 121 110 88
3 79 79 81 195 417 926 748 235 127 120 105 86
4 79 78 81 198 444 924 680 224 128 120 107 84
5 78 80 82 203 467 951 628 214 128 123 107 83
6 79 79 82 208 483 967 588 213 127 128 105 83
7 79 79 83 221 496 991 562 207 126 125 103 82
8 79 79 84 242 520 977 567 196 126 117 104 82
9 80 79 85 259 542 964 553 185 123 115 103 82
10 79 79 84 261 565 934 558 184 125 114 102 81
11 79 80 86 252 597 930 565 193 122 109 104 80
12 79 79 88 257 585 927 550 193 123 105 104 80
13 79 79 91 270 565 938 532 187 122 108 104 80
14 80 80 93 276 571 950 507 180 131 106 106 81
15 79 79 94 277 597 939 484 176 131 108 101 81
16 79 79 98 270 628 944 466 170 129 105 97 80
17 79 79 102 289 650 961 451 170 124 103 102 81
18 79 79 105 299 671 995 423 169 122 103 100 80
19 79 79 107 298 687 995 415 170 120 104 100 80
20 79 79 113 296 727 1,020 408 173 115 103 100 80
21 79 79 120 311 710 1,040 402 173 115 104 99 81
22 78 81 128 317 713 1,070 388 168 117 106 95 80
23 79 79 136 324 735 1,090 365 167 120 107 97 80
24 78 79 143 349 736 1,000 353 166 117 106 92 80
25 78 80 142 358 767 958 338 162 117 109 93 79
26 79 80 149 355 734 893 313 157 116 109 94 79
27 79 80 154 354 730 854 290 154 117 107 92 79
28 78 80 159 345 753 839 280 152 122 107 89 79
29 78 81 165 350 816 816 280 149 123 107 91 79
30 79   166 359 861 782 279 144 124 104 89 79
31 78   172   891   274 144   110   79