San Martin, California · field elev 284 ft
Density Altitude at San Martin (E16)
San Martin sits at 284 ft, and even a typical July afternoon (87 °F) only lifts density altitude to about 2,162 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 | 49.4 | −269 ft | 60.7 | 480 ft |
| February | 52.2 | −82 ft | 64.0 | 695 ft |
| March | 55.3 | 125 ft | 68.1 | 960 ft |
| April | 58.2 | 316 ft | 71.9 | 1,204 ft |
| May | 63.1 | 637 ft | 77.3 | 1,546 ft |
| June | 67.2 | 902 ft | 82.8 | 1,890 ft |
| July | 70.6 | 1,121 ft | 87.2 | 2,162 ft |
| August | 70.8 | 1,133 ft | 87.2 | 2,162 ft |
| September | 68.7 | 999 ft | 84.9 | 2,020 ft |
| October | 63.4 | 656 ft | 78.8 | 1,640 ft |
| November | 55.0 | 105 ft | 68.3 | 973 ft |
| December | 48.7 | −316 ft | 60.4 | 461 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 E16
DENSITY ALTITUDE
Field elevation 284 ft — the air behaves like 2,149 ft.
- PRESSURE ALT
- 285 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
- 1C9 — Frazier Lake Airpark
Hollister · elev 152 ft
- KWVI — Watsonville Municipal
Watsonville · elev 163 ft
- KCVH — Hollister Municipal
Hollister · elev 231 ft
- KRHV — Reid-Hillview Of Santa Clara County
San Jose · elev 135 ft
- KSJC — Norman Y Mineta San Jose International
San Jose · elev 62 ft
- KSNS — Salinas Municipal
Salinas · elev 84 ft
- KOAR — Marina Municipal
Marina · elev 137 ft
- KMRY — Monterey Regional
Monterey · elev 257 ft
Frequently asked questions
How high does density altitude get at E16 in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at San Martin reaches roughly 2,162 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 E16 on an average day?
It swings with the seasons: from roughly −316 ft at the coldest month's average temperature to about 1,133 ft at the warmest month's — all from a constant field elevation of 284 ft. The month-by-month table above carries the full year.
What is the field elevation of San Martin?
284 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is E16 (FAA), in San Martin, California.