Rotan/Roby, Texas · field elev 1,941 ft
Density Altitude at Fisher County (56F)
Fisher County sits at 1,941 ft, and even a typical July afternoon (96 °F) only lifts density altitude to about 4,690 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 | 44.9 | 1,483 ft | 56.4 | 2,243 ft |
| February | 49.1 | 1,763 ft | 61.0 | 2,541 ft |
| March | 56.7 | 2,262 ft | 69.2 | 3,064 ft |
| April | 65.8 | 2,848 ft | 78.5 | 3,646 ft |
| May | 74.4 | 3,391 ft | 85.8 | 4,094 ft |
| June | 82.0 | 3,862 ft | 92.5 | 4,499 ft |
| July | 85.2 | 4,058 ft | 95.7 | 4,690 ft |
| August | 84.2 | 3,997 ft | 95.0 | 4,648 ft |
| September | 76.6 | 3,528 ft | 87.1 | 4,173 ft |
| October | 66.4 | 2,887 ft | 77.9 | 3,609 ft |
| November | 54.8 | 2,138 ft | 66.3 | 2,880 ft |
| December | 46.5 | 1,590 ft | 57.5 | 2,314 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 56F
DENSITY ALTITUDE
Field elevation 1,941 ft — the air behaves like 4,708 ft.
- PRESSURE ALT
- 1,942 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
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- AIR DENSITY
- —
- WATER · GRAINS/LB
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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 Texas fields
- KSWW — Avenger Field
Sweetwater · elev 2,380 ft
- T60 — Stonewall County
Aspermont · elev 1,744 ft
- 22F — Kent County
Jayton · elev 2,008 ft
- KSNK — Winston Field
Snyder · elev 2,430 ft
- T88 — Colorado City
Colorado City · elev 2,214 ft
- F56 — Arledge Field
Stamford · elev 1,561 ft
- 15F — Haskell Municipal
Haskell · elev 1,625 ft
- KABI — Abilene Regional
Abilene · elev 1,791 ft
Frequently asked questions
How high does density altitude get at 56F in summer?
On a typical July afternoon — around 96 °F at the nearest NOAA normals station — density altitude at Fisher County reaches roughly 4,690 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 56F on an average day?
It swings with the seasons: from roughly 1,483 ft at the coldest month's average temperature to about 4,058 ft at the warmest month's — all from a constant field elevation of 1,941 ft. The month-by-month table above carries the full year.
What is the field elevation of Fisher County?
1,941 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 56F (FAA), in Rotan/Roby, Texas.