Henderson, Texas · field elev 442 ft
Density Altitude at Rusk County (KRFI)
Rusk County sits at 442 ft, and even a typical August afternoon (95 °F) only lifts density altitude to about 2,829 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 | −235 ft | 58.5 | 531 ft |
| February | 50.7 | 14 ft | 62.7 | 806 ft |
| March | 57.6 | 472 ft | 69.8 | 1,263 ft |
| April | 64.7 | 935 ft | 77.0 | 1,720 ft |
| May | 72.6 | 1,442 ft | 83.6 | 2,132 ft |
| June | 79.6 | 1,883 ft | 90.3 | 2,544 ft |
| July | 82.8 | 2,083 ft | 93.6 | 2,745 ft |
| August | 83.2 | 2,107 ft | 95.0 | 2,829 ft |
| September | 77.2 | 1,733 ft | 89.4 | 2,489 ft |
| October | 66.8 | 1,071 ft | 79.6 | 1,883 ft |
| November | 56.1 | 373 ft | 68.1 | 1,155 ft |
| December | 49.1 | −93 ft | 60.6 | 669 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 KRFI
DENSITY ALTITUDE
Field elevation 442 ft — the air behaves like 2,829 ft.
- PRESSURE ALT
- 443 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 Texas fields
- KGGG — East Texas Regional
Longview · elev 366 ft
- 6X0 — Tarrant Field
Mount Selman · elev 590 ft
- 07F — Gladewater Municipal
Gladewater · elev 297 ft
- KJSO — Cherokee County
Jacksonville · elev 678 ft
- 4F2 — Panola County-Sharpe Field
Carthage · elev 248 ft
- T25 — Aero Estates
Frankston · elev 445 ft
- KTYR — Tyler Pounds Regional
Tyler · elev 544 ft
- KJXI — Fox Stephens Field/Gilmer Municipal
Gilmer · elev 415 ft
Frequently asked questions
How high does density altitude get at KRFI in summer?
On a typical August afternoon — around 95 °F at the nearest NOAA normals station — density altitude at Rusk County reaches roughly 2,829 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 KRFI on an average day?
It swings with the seasons: from roughly −235 ft at the coldest month's average temperature to about 2,107 ft at the warmest month's — all from a constant field elevation of 442 ft. The month-by-month table above carries the full year.
What is the field elevation of Rusk County?
442 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KRFI (ICAO) / RFI (FAA), in Henderson, Texas.