Twentynine Palms, California · field elev 1,888 ft
Density Altitude at Twentynine Palms (KTNP)
From a field elevation of 1,888 ft, a typical July afternoon at Twentynine Palms (104 °F) raises density altitude to about 5,116 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 | 52.6 | 1,928 ft | 63.3 | 2,624 ft |
| February | 55.7 | 2,132 ft | 67.2 | 2,873 ft |
| March | 61.7 | 2,521 ft | 74.1 | 3,308 ft |
| April | 67.8 | 2,911 ft | 81.1 | 3,742 ft |
| May | 76.4 | 3,451 ft | 89.9 | 4,278 ft |
| June | 85.1 | 3,987 ft | 99.4 | 4,845 ft |
| July | 90.7 | 4,326 ft | 104.0 | 5,116 ft ▲ |
| August | 89.6 | 4,260 ft | 102.7 | 5,039 ft ▲ |
| September | 82.9 | 3,852 ft | 96.5 | 4,673 ft |
| October | 71.2 | 3,126 ft | 84.7 | 3,963 ft |
| November | 59.3 | 2,366 ft | 71.6 | 3,151 ft |
| December | 50.9 | 1,816 ft | 62.0 | 2,540 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 KTNP
DENSITY ALTITUDE caution
Field elevation 1,888 ft — the air behaves like 5,116 ft.
- PRESSURE ALT
- 1,889 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 California fields
- L22 — Yucca Valley
Yucca Valley · elev 3,224 ft
- KUDD — Bermuda Dunes
Palm Springs · elev 73 ft
- L77 — Chiriaco Summit
Chiriaco Summit · elev 1,711 ft
- KTRM — Jacqueline Cochran Regional
Palm Springs · elev −114 ft
- KPSP — Palm Springs International
Palm Springs · elev 477 ft
- L35 — Big Bear City
Big Bear City · elev 6,752 ft
- KBNG — Banning Municipal
Banning · elev 2,222 ft
- KSAS — Salton Sea
Salton City · elev −84 ft
Frequently asked questions
How high does density altitude get at KTNP in summer?
On a typical July afternoon — around 104 °F at the nearest NOAA normals station — density altitude at Twentynine Palms reaches roughly 5,116 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 KTNP on an average day?
It swings with the seasons: from roughly 1,816 ft at the coldest month's average temperature to about 4,326 ft at the warmest month's — all from a constant field elevation of 1,888 ft. The month-by-month table above carries the full year.
What is the field elevation of Twentynine Palms?
1,888 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KTNP (ICAO) / TNP (FAA), in Twentynine Palms, California.