Fairfield, Utah · field elev 4,886 ft
Density Altitude at West Desert Airpark (UT9)
From a field elevation of 4,886 ft, a typical July afternoon at West Desert Airpark (90 °F) raises density altitude to about 7,928 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 | 26.3 | 3,880 ft | 39.3 | 4,755 ft |
| February | 31.1 | 4,206 ft | 44.5 | 5,097 ft ▲ |
| March | 40.4 | 4,828 ft | 56.0 | 5,838 ft ▲ |
| April | 46.3 | 5,214 ft | 63.0 | 6,280 ft ▲ |
| May | 54.4 | 5,736 ft | 72.1 | 6,843 ft ▲ |
| June | 63.2 | 6,292 ft | 82.5 | 7,472 ft ▲ |
| July | 70.6 | 6,751 ft | 90.2 | 7,928 ft ▲ |
| August | 69.0 | 6,652 ft | 88.6 | 7,834 ft ▲ |
| September | 60.2 | 6,104 ft | 80.0 | 7,322 ft ▲ |
| October | 47.6 | 5,299 ft | 66.6 | 6,504 ft ▲ |
| November | 35.8 | 4,522 ft | 51.8 | 5,570 ft ▲ |
| December | 26.7 | 3,907 ft | 40.2 | 4,814 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 UT9
DENSITY ALTITUDE caution
Field elevation 4,886 ft — the air behaves like 7,916 ft.
- PRESSURE ALT
- 4,888 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
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- AIR DENSITY
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- 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
- KPVU — Provo Municipal
Provo · elev 4,497 ft
- KSPK — Spanish Fork Municipal/Woodhouse Field
Spanish Fork · elev 4,530 ft
- KSVR — South Valley Regional
Salt Lake City · elev 4,606 ft
- KTVY — Bolinder Field/Tooele Valley
Tooele · elev 4,321 ft
- U14 — Nephi Municipal
Nephi · elev 5,022 ft
- KSLC — Salt Lake City International
Salt Lake City · elev 4,231 ft
- KHCR — Heber Valley
Heber · elev 5,637 ft
- KBTF — Skypark
Bountiful · elev 4,237 ft
Frequently asked questions
How high does density altitude get at UT9 in summer?
On a typical July afternoon — around 90 °F at the nearest NOAA normals station — density altitude at West Desert Airpark reaches roughly 7,928 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 UT9 on an average day?
It swings with the seasons: from roughly 3,880 ft at the coldest month's average temperature to about 6,751 ft at the warmest month's — all from a constant field elevation of 4,886 ft. The month-by-month table above carries the full year.
What is the field elevation of West Desert Airpark?
4,886 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is UT9 (FAA), in Fairfield, Utah.