Jackson, Mississippi · field elev 346 ft
Density Altitude at Jackson-Medgar Wiley Evers International (KJAN)
Jackson-Medgar Wiley Evers International sits at 346 ft, and even a typical August afternoon (92 °F) only lifts density altitude to about 2,543 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 | −354 ft | 57.4 | 340 ft |
| February | 50.9 | −92 ft | 62.0 | 642 ft |
| March | 57.9 | 373 ft | 69.4 | 1,120 ft |
| April | 64.9 | 830 ft | 76.5 | 1,571 ft |
| May | 72.9 | 1,343 ft | 83.8 | 2,027 ft |
| June | 79.6 | 1,766 ft | 89.9 | 2,403 ft |
| July | 82.1 | 1,922 ft | 92.1 | 2,537 ft |
| August | 81.8 | 1,903 ft | 92.2 | 2,543 ft |
| September | 76.9 | 1,596 ft | 87.8 | 2,274 ft |
| October | 66.2 | 914 ft | 78.3 | 1,684 ft |
| November | 55.4 | 208 ft | 67.2 | 979 ft |
| December | 49.1 | −212 ft | 59.6 | 485 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 KJAN
DENSITY ALTITUDE
Field elevation 346 ft — the air behaves like 2,531 ft.
- PRESSURE ALT
- 347 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 Mississippi fields
- KHKS — Hawkins Field
Jackson · elev 341 ft
- KMBO — Bruce Campbell Field
Madison · elev 325 ft
- KJVW — John Bell Williams
Raymond · elev 247 ft
- M11 — Copiah County
Crystal Springs · elev 435 ft
- 2M4 — G V Montgomery
Forest · elev 518 ft
- 17M — Magee Municipal
Magee · elev 556 ft
- 08M — Carthage-Leake County
Carthage · elev 457 ft
- 87I — Yazoo County
Yazoo City · elev 105 ft
Frequently asked questions
How high does density altitude get at KJAN in summer?
On a typical August afternoon — around 92 °F at the nearest NOAA normals station — density altitude at Jackson-Medgar Wiley Evers International reaches roughly 2,543 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 KJAN on an average day?
It swings with the seasons: from roughly −354 ft at the coldest month's average temperature to about 1,922 ft at the warmest month's — all from a constant field elevation of 346 ft. The month-by-month table above carries the full year.
What is the field elevation of Jackson-Medgar Wiley Evers International?
346 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KJAN (ICAO) / JAN (FAA), in Jackson, Mississippi.