Dutch John, Utah · field elev 5,638 ft
Density Altitude at Taylor Flat (TF9)
Taylor Flat is a genuine high-and-hot field: from 5,638 ft of elevation, a typical July afternoon (91 °F) pushes density altitude to about 8,860 ft — the airplane performs like it is 3,222 ft above the field before the wheels roll.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 26.3 | 4,815 ft | 39.9 | 5,723 ft ▲ |
| February | 31.0 | 5,132 ft | 43.8 | 5,978 ft ▲ |
| March | 39.7 | 5,710 ft | 54.6 | 6,672 ft ▲ |
| April | 46.6 | 6,160 ft | 62.1 | 7,143 ft ▲ |
| May | 55.4 | 6,722 ft | 71.9 | 7,746 ft ▲ |
| June | 65.0 | 7,323 ft | 83.1 | 8,419 ft ⚠ |
| July | 72.1 | 7,758 ft | 90.6 | 8,860 ft ⚠ |
| August | 69.2 | 7,581 ft | 87.8 | 8,696 ft ⚠ |
| September | 60.6 | 7,049 ft | 78.6 | 8,150 ft ⚠ |
| October | 48.5 | 6,282 ft | 64.8 | 7,310 ft ▲ |
| November | 35.9 | 5,459 ft | 49.5 | 6,347 ft ▲ |
| December | 26.3 | 4,815 ft | 39.8 | 5,717 ft ▲ |
▲ above 5,000 ft · ⚠ above 8,000 ft. These are planning references at standard pressure and dry air — afternoon humidity and low pressure both push the real number higher. Run today's values below.
Run today’s numbers for TF9
DENSITY ALTITUDE high DA
Field elevation 5,638 ft — the air behaves like 8,883 ft.
- PRESSURE ALT
- 5,640 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
- —
- AIR DENSITY
- —
- WATER · GRAINS/LB
- —
For training and reference · verify with official sources and your POH before flight · no tool on this site renders a go / no-go judgment
Nearby Utah fields
- 33U — Dutch John
Dutch John · elev 6,561 ft
- 40U — Manila
Manila · elev 6,179 ft
- KVEL — Vernal Regional
Vernal · elev 5,274 ft
- 74V — Roosevelt Municipal
Roosevelt · elev 5,176 ft
- U69 — Duchesne Municipal
Duchesne · elev 5,831 ft
- KPUC — Carbon County Regional/Buck Davis Field
Price · elev 5,958 ft
- KHCR — Heber Valley
Heber · elev 5,637 ft
- 42U — Morgan County
Morgan · elev 5,020 ft
Frequently asked questions
How high does density altitude get at TF9 in summer?
On a typical July afternoon — around 91 °F at the nearest NOAA normals station — density altitude at Taylor Flat reaches roughly 8,860 ft at standard pressure. Hotter-than-normal days, low pressure, and humidity all push it higher, so run the day's actual numbers before flying.
What is the density altitude at TF9 on an average day?
It swings with the seasons: from roughly 4,815 ft at the coldest month's average temperature to about 7,758 ft at the warmest month's — all from a constant field elevation of 5,638 ft. The month-by-month table above carries the full year.
What is the field elevation of Taylor Flat?
5,638 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is TF9 (FAA), in Dutch John, Utah.