Gilmer, Texas · field elev 415 ft
Density Altitude at Fox Stephens Field/Gilmer Municipal (KJXI)
Fox Stephens Field/Gilmer Municipal sits at 415 ft, and even a typical July afternoon (93 °F) only lifts density altitude to about 2,651 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 | 44.1 | −465 ft | 55.6 | 307 ft |
| February | 47.7 | −221 ft | 60.2 | 609 ft |
| March | 54.8 | 254 ft | 67.0 | 1,051 ft |
| April | 61.9 | 720 ft | 74.5 | 1,529 ft |
| May | 70.4 | 1,269 ft | 81.6 | 1,975 ft |
| June | 77.9 | 1,744 ft | 88.6 | 2,407 ft |
| July | 81.5 | 1,969 ft | 92.6 | 2,651 ft |
| August | 80.8 | 1,925 ft | 92.2 | 2,627 ft |
| September | 74.8 | 1,548 ft | 87.4 | 2,334 ft |
| October | 64.3 | 876 ft | 77.2 | 1,700 ft |
| November | 53.3 | 154 ft | 65.5 | 954 ft |
| December | 45.7 | −356 ft | 57.4 | 425 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 KJXI
DENSITY ALTITUDE
Field elevation 415 ft — the air behaves like 2,676 ft.
- PRESSURE ALT
- 416 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 KJXI in summer?
On a typical July afternoon — around 93 °F at the nearest NOAA normals station — density altitude at Fox Stephens Field/Gilmer Municipal reaches roughly 2,651 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 KJXI on an average day?
It swings with the seasons: from roughly −465 ft at the coldest month's average temperature to about 1,969 ft at the warmest month's — all from a constant field elevation of 415 ft. The month-by-month table above carries the full year.
What is the field elevation of Fox Stephens Field/Gilmer Municipal?
415 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KJXI (ICAO) / JXI (FAA), in Gilmer, Texas.