Klamath Glen, California · field elev 42 ft
Density Altitude at Andy Mc Beth (S51)
Andy Mc Beth sits at 42 ft, and even a typical September afternoon (67 °F) only lifts density altitude to about 566 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 | 47.0 | −731 ft | 54.7 | −214 ft |
| February | 47.4 | −704 ft | 55.8 | −141 ft |
| March | 48.5 | −630 ft | 56.7 | −82 ft |
| April | 50.7 | −482 ft | 58.7 | 50 ft |
| May | 53.8 | −274 ft | 61.2 | 215 ft |
| June | 55.3 | −175 ft | 64.2 | 410 ft |
| July | 59.4 | 96 ft | 66.2 | 540 ft |
| August | 58.6 | 44 ft | 66.3 | 546 ft |
| September | 58.2 | 17 ft | 66.6 | 566 ft |
| October | 54.1 | −254 ft | 63.2 | 345 ft |
| November | 49.3 | −576 ft | 57.7 | −16 ft |
| December | 46.1 | −792 ft | 54.3 | −241 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 S51
DENSITY ALTITUDE
Field elevation 42 ft — the air behaves like 592 ft.
- PRESSURE ALT
- 43 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
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Frequently asked questions
How high does density altitude get at S51 in summer?
On a typical September afternoon — around 67 °F at the nearest NOAA normals station — density altitude at Andy Mc Beth reaches roughly 566 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 S51 on an average day?
It swings with the seasons: from roughly −792 ft at the coldest month's average temperature to about 96 ft at the warmest month's — all from a constant field elevation of 42 ft. The month-by-month table above carries the full year.
What is the field elevation of Andy Mc Beth?
42 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is S51 (FAA), in Klamath Glen, California.