El Monte, California · field elev 296 ft
Density Altitude at San Gabriel Valley (KEMT)
San Gabriel Valley sits at 296 ft, and even a typical August afternoon (88 °F) only lifts density altitude to about 2,201 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 | 57.4 | 278 ft | 68.6 | 1,007 ft |
| February | 57.7 | 298 ft | 68.2 | 981 ft |
| March | 60.7 | 495 ft | 70.9 | 1,154 ft |
| April | 63.2 | 658 ft | 73.8 | 1,339 ft |
| May | 66.6 | 878 ft | 75.6 | 1,453 ft |
| June | 71.2 | 1,174 ft | 80.8 | 1,780 ft |
| July | 75.4 | 1,440 ft | 85.5 | 2,072 ft |
| August | 76.6 | 1,516 ft | 87.6 | 2,201 ft |
| September | 75.1 | 1,421 ft | 86.7 | 2,146 ft |
| October | 69.0 | 1,033 ft | 80.7 | 1,773 ft |
| November | 62.3 | 600 ft | 74.0 | 1,352 ft |
| December | 56.6 | 226 ft | 67.8 | 956 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 KEMT
DENSITY ALTITUDE
Field elevation 296 ft — the air behaves like 2,225 ft.
- PRESSURE ALT
- 297 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
- KPOC — Brackett Field
La Verne · elev 1,014 ft
- KFUL — Fullerton Municipal
Fullerton · elev 96 ft
- KCPM — Compton/Woodley
Compton · elev 99 ft
- KLGB — Long Beach (Daugherty Field)
Long Beach · elev 60 ft
- KCCB — Cable
Upland · elev 1,444 ft
- KBUR — Bob Hope
Burbank · elev 778 ft
- KHHR — Jack Northrop Field/Hawthorne Municipal
Hawthorne · elev 66 ft
- KLAX — Los Angeles International
Los Angeles · elev 128 ft
Frequently asked questions
How high does density altitude get at KEMT in summer?
On a typical August afternoon — around 88 °F at the nearest NOAA normals station — density altitude at San Gabriel Valley reaches roughly 2,201 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 KEMT on an average day?
It swings with the seasons: from roughly 226 ft at the coldest month's average temperature to about 1,516 ft at the warmest month's — all from a constant field elevation of 296 ft. The month-by-month table above carries the full year.
What is the field elevation of San Gabriel Valley?
296 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KEMT (ICAO) / EMT (FAA), in El Monte, California.