Hyampom, California · field elev 1,277 ft
Density Altitude at Hyampom (H47)
Hyampom sits at 1,277 ft, and even a typical July afternoon (97 °F) only lifts density altitude to about 3,933 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 | 42.0 | 463 ft | 49.6 | 974 ft |
| February | 45.2 | 680 ft | 55.5 | 1,365 ft |
| March | 49.5 | 968 ft | 62.3 | 1,808 ft |
| April | 53.9 | 1,259 ft | 68.9 | 2,231 ft |
| May | 61.1 | 1,730 ft | 78.4 | 2,829 ft |
| June | 67.3 | 2,129 ft | 86.4 | 3,323 ft |
| July | 74.8 | 2,604 ft | 96.5 | 3,933 ft |
| August | 73.8 | 2,541 ft | 95.4 | 3,867 ft |
| September | 68.1 | 2,180 ft | 89.0 | 3,481 ft |
| October | 57.5 | 1,496 ft | 74.3 | 2,573 ft |
| November | 47.2 | 814 ft | 56.8 | 1,450 ft |
| December | 40.9 | 389 ft | 47.7 | 848 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 H47
DENSITY ALTITUDE
Field elevation 1,277 ft — the air behaves like 3,963 ft.
- PRESSURE ALT
- 1,278 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
- D63 — Dinsmore
Dinsmore · elev 2,393 ft
- F62 — Hayfork
Hayfork · elev 2,334 ft
- O19 — Kneeland
Eureka · elev 2,741 ft
- O54 — Lonnie Pool Field/Weaverville
Weaverville · elev 2,350 ft
- T42 — Ruth
Ruth · elev 2,781 ft
- O21 — Hoopa
Hoopa · elev 356 ft
- KFOT — Rohnerville
Fortuna · elev 393 ft
- KEKA — Murray Field
Eureka · elev 11 ft
Frequently asked questions
How high does density altitude get at H47 in summer?
On a typical July afternoon — around 97 °F at the nearest NOAA normals station — density altitude at Hyampom reaches roughly 3,933 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 H47 on an average day?
It swings with the seasons: from roughly 389 ft at the coldest month's average temperature to about 2,604 ft at the warmest month's — all from a constant field elevation of 1,277 ft. The month-by-month table above carries the full year.
What is the field elevation of Hyampom?
1,277 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is H47 (FAA), in Hyampom, California.