Chemehuevi Valley, California · field elev 638 ft
Density Altitude at Chemehuevi Valley (49X)
Chemehuevi Valley sits at 638 ft, and even a typical July afternoon (109 °F) only lifts density altitude to about 3,916 ft — heat still trims performance, but the field rarely turns high-and-hot.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 53.9 | 470 ft | 65.2 | 1,209 ft |
| February | 58.1 | 747 ft | 70.4 | 1,542 ft |
| March | 64.8 | 1,183 ft | 78.1 | 2,029 ft |
| April | 71.7 | 1,625 ft | 85.8 | 2,507 ft |
| May | 81.1 | 2,216 ft | 95.2 | 3,080 ft |
| June | 90.3 | 2,783 ft | 105.1 | 3,670 ft |
| July | 96.0 | 3,128 ft | 109.3 | 3,916 ft |
| August | 95.2 | 3,080 ft | 108.1 | 3,846 ft |
| September | 88.2 | 2,654 ft | 101.9 | 3,480 ft |
| October | 75.3 | 1,853 ft | 89.1 | 2,709 ft |
| November | 62.4 | 1,028 ft | 74.9 | 1,828 ft |
| December | 52.8 | 397 ft | 63.8 | 1,118 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 49X
DENSITY ALTITUDE
Field elevation 638 ft — the air behaves like 3,899 ft.
- PRESSURE ALT
- 639 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
- KEED — Needles
Needles · elev 983 ft
- KBLH — Blythe
Blythe · elev 400 ft
- KTNP — Twentynine Palms
Twentynine Palms · elev 1,888 ft
- L77 — Chiriaco Summit
Chiriaco Summit · elev 1,711 ft
- 0O2 — Baker
Baker · elev 922 ft
- KCLR — Cliff Hatfield Meml
Calipatria · elev −182 ft
- L22 — Yucca Valley
Yucca Valley · elev 3,224 ft
- KTRM — Jacqueline Cochran Regional
Palm Springs · elev −114 ft
Frequently asked questions
How high does density altitude get at 49X in summer?
On a typical July afternoon — around 109 °F at the nearest NOAA normals station — density altitude at Chemehuevi Valley reaches roughly 3,916 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 49X on an average day?
It swings with the seasons: from roughly 397 ft at the coldest month's average temperature to about 3,128 ft at the warmest month's — all from a constant field elevation of 638 ft. The month-by-month table above carries the full year.
What is the field elevation of Chemehuevi Valley?
638 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 49X (FAA), in Chemehuevi Valley, California.