Fortuna, California · field elev 393 ft
Density Altitude at Rohnerville (KFOT)
Rohnerville sits at 393 ft, and even a typical September afternoon (73 °F) only lifts density altitude to about 1,375 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 | 49.6 | −121 ft | 56.6 | 345 ft |
| February | 50.3 | −74 ft | 57.8 | 425 ft |
| March | 51.4 | 0 ft | 59.2 | 517 ft |
| April | 53.4 | 133 ft | 61.6 | 674 ft |
| May | 56.5 | 339 ft | 64.4 | 856 ft |
| June | 59.3 | 523 ft | 67.2 | 1,036 ft |
| July | 61.8 | 687 ft | 70.0 | 1,216 ft |
| August | 62.9 | 758 ft | 71.6 | 1,318 ft |
| September | 62.2 | 713 ft | 72.5 | 1,375 ft |
| October | 58.4 | 464 ft | 68.6 | 1,126 ft |
| November | 52.7 | 87 ft | 60.6 | 608 ft |
| December | 48.3 | −208 ft | 55.1 | 246 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 KFOT
DENSITY ALTITUDE
Field elevation 393 ft — the air behaves like 1,407 ft.
- PRESSURE ALT
- 394 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
- O19 — Kneeland
Eureka · elev 2,741 ft
- O33 — Samoa Field
Eureka · elev 20 ft
- KEKA — Murray Field
Eureka · elev 11 ft
- D63 — Dinsmore
Dinsmore · elev 2,393 ft
- KACV — California Redwood Coast-Humboldt County
Arcata/Eureka · elev 222 ft
- H47 — Hyampom
Hyampom · elev 1,277 ft
- O16 — Garberville
Garberville · elev 551 ft
- 0Q5 — Shelter Cove
Shelter Cove · elev 73 ft
Frequently asked questions
How high does density altitude get at KFOT in summer?
On a typical September afternoon — around 73 °F at the nearest NOAA normals station — density altitude at Rohnerville reaches roughly 1,375 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 KFOT on an average day?
It swings with the seasons: from roughly −208 ft at the coldest month's average temperature to about 758 ft at the warmest month's — all from a constant field elevation of 393 ft. The month-by-month table above carries the full year.
What is the field elevation of Rohnerville?
393 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KFOT (ICAO) / FOT (FAA), in Fortuna, California.