Henry's Fork
The best month to fish the Henry's Fork is October. The month to avoid is July. Right now, in September, it is worth going.
- January: 61 out of 100
- February: 68 out of 100
- March: 76 out of 100
- April: 55 out of 100
- May: 55 out of 100
- June: 43 out of 100
- July: 37 out of 100
- August: 54 out of 100
- September: 71 out of 100
- October: 80 out of 100
- November: 73 out of 100
- December: 61 out of 100
GAUGE 13056500 · COLOURED BY SEPTEMBER
Month by month
| MONTH | TYPICAL FLOW | RANGE (P20–P80) | WATER | AIR HIGH | RAIN | SCORE |
|---|---|---|---|---|---|---|
| January | 1,794 cfs | 1,603–2,000 | 32.1°F | — | — | 61 |
| February | 1,758 cfs | 1,658–1,965 | 32.7°F | — | — | 68 |
| March | 1,778 cfs | 1,556–1,904 | 41.3°F | — | — | 76 |
| April | 2,103 cfs | 1,754–2,999 | 48.1°F | — | — | 55 |
| May | 3,802 cfs | 2,774–5,536 | 53.9°F | — | — | 55 |
| June | 3,560 cfs | 1,685–5,290 | 61.3°F | — | — | 43 |
| July | 1,047 cfs | 820–1,351 | 68.9°F | — | — | 37 |
| August | 954 cfs | 826–1,071 | 66.6°F | — | — | 54 |
| SeptemberNOW | 1,014 cfs | 920–1,484 | 58.7°F | — | — | 71 |
| October | 1,422 cfs | 1,077–1,623 | 47.8°F | — | — | 80 |
| November | 1,693 cfs | 1,444–1,815 | 37.8°F | — | — | 73 |
| December | 1,801 cfs | 1,493–2,024 | 32.5°F | — | — | 61 |
WHERE THESE NUMBERS COME FROM
Flow and water temperature are medians of the monthly means reported by USGS gauge 13056500 over 2006-2025. Air temperature and precipitation are ten-year normals from Open-Meteo at this river’s gauge coordinates.
The window is deliberate. USGS’s own full-record statistics for a dammed river reach back before the dam — at Lees Ferry, to 1922, forty-one years before Glen Canyon closed — and describe a river that no longer exists.
Flow is scored against this river’s own fishable band of 1,422–1,801 cfs. There is no universal band: 8,000 cfs is low water on a big tailwater and a flood on a spring creek.
Water temperature is a ceiling rather than a weight. Above about 68°F a trout that is fought and released frequently dies anyway, so no month above that line is scored as worth booking, however good its flow.
The Henry's Fork is at its best in October — water around 48°F, flows near 1,422 cfs.
← RIVERS GOING WELL IN SEPTEMBERRegulations, licences and access change without notice and are not reproduced here as fact — check the state agency before you travel. A median describes twenty years; it does not forecast your week. Source: U.S. Geological Survey, National Water Information System.