Hooper, Utah · field elev 4,234 ft
Density Altitude at Fremont Island Lower (1UT)
From a field elevation of 4,234 ft, a typical July afternoon at Fremont Island Lower (95 °F) raises density altitude to about 7,404 ft — solidly into the range where performance charts deserve a close read.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 29.1 | 3,260 ft | 38.0 | 3,862 ft |
| February | 34.4 | 3,620 ft | 44.2 | 4,273 ft |
| March | 44.1 | 4,266 ft | 55.9 | 5,032 ft ▲ |
| April | 50.8 | 4,703 ft | 63.0 | 5,482 ft ▲ |
| May | 60.2 | 5,305 ft | 73.8 | 6,153 ft ▲ |
| June | 70.2 | 5,931 ft | 85.5 | 6,861 ft ▲ |
| July | 78.3 | 6,427 ft | 94.7 | 7,404 ft ▲ |
| August | 76.7 | 6,330 ft | 93.9 | 7,357 ft ▲ |
| September | 65.8 | 5,658 ft | 80.8 | 6,579 ft ▲ |
| October | 52.7 | 4,826 ft | 66.5 | 5,701 ft ▲ |
| November | 39.5 | 3,962 ft | 50.4 | 4,678 ft |
| December | 30.2 | 3,335 ft | 38.6 | 3,902 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 1UT
DENSITY ALTITUDE caution
Field elevation 4,234 ft — the air behaves like 7,422 ft.
- PRESSURE ALT
- 4,236 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
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- 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
- 2UT — Fremont Island Upper
Hooper · elev 4,654 ft
- KOGD — Ogden-Hinckley
Ogden · elev 4,473 ft
- KBMC — Brigham City Regional
Brigham City · elev 4,230 ft
- KBTF — Skypark
Bountiful · elev 4,237 ft
- 42U — Morgan County
Morgan · elev 5,020 ft
- KSLC — Salt Lake City International
Salt Lake City · elev 4,231 ft
- KTVY — Bolinder Field/Tooele Valley
Tooele · elev 4,321 ft
- KSVR — South Valley Regional
Salt Lake City · elev 4,606 ft
Frequently asked questions
How high does density altitude get at 1UT in summer?
On a typical July afternoon — around 95 °F at the nearest NOAA normals station — density altitude at Fremont Island Lower reaches roughly 7,404 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 1UT on an average day?
It swings with the seasons: from roughly 3,260 ft at the coldest month's average temperature to about 6,427 ft at the warmest month's — all from a constant field elevation of 4,234 ft. The month-by-month table above carries the full year.
What is the field elevation of Fremont Island Lower?
4,234 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 1UT (FAA), in Hooper, Utah.