Raymond, Mississippi · field elev 247 ft
Density Altitude at John Bell Williams (KJVW)
John Bell Williams sits at 247 ft, and even a typical July afternoon (93 °F) only lifts density altitude to about 2,490 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 | 46.9 | −484 ft | 58.6 | 297 ft |
| February | 50.7 | −228 ft | 63.0 | 585 ft |
| March | 58.0 | 257 ft | 70.2 | 1,050 ft |
| April | 64.8 | 702 ft | 77.0 | 1,481 ft |
| May | 73.0 | 1,228 ft | 84.4 | 1,944 ft |
| June | 79.8 | 1,657 ft | 90.6 | 2,325 ft |
| July | 82.3 | 1,813 ft | 93.3 | 2,490 ft |
| August | 81.6 | 1,770 ft | 93.3 | 2,490 ft |
| September | 76.8 | 1,469 ft | 89.3 | 2,246 ft |
| October | 66.7 | 825 ft | 80.5 | 1,701 ft |
| November | 55.2 | 72 ft | 68.6 | 947 ft |
| December | 49.6 | −302 ft | 60.9 | 448 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 KJVW
DENSITY ALTITUDE
Field elevation 247 ft — the air behaves like 2,471 ft.
- PRESSURE ALT
- 248 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
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- KJAN — Jackson-Medgar Wiley Evers International
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- KMBO — Bruce Campbell Field
Madison · elev 325 ft
- M11 — Copiah County
Crystal Springs · elev 435 ft
- KVKS — Vicksburg Municipal
Vicksburg · elev 107 ft
- 87I — Yazoo County
Yazoo City · elev 105 ft
- 17M — Magee Municipal
Magee · elev 556 ft
- 1R7 — Brookhaven-Lincoln County
Brookhaven · elev 492 ft
Frequently asked questions
How high does density altitude get at KJVW in summer?
On a typical July afternoon — around 93 °F at the nearest NOAA normals station — density altitude at John Bell Williams reaches roughly 2,490 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 KJVW on an average day?
It swings with the seasons: from roughly −484 ft at the coldest month's average temperature to about 1,813 ft at the warmest month's — all from a constant field elevation of 247 ft. The month-by-month table above carries the full year.
What is the field elevation of John Bell Williams?
247 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KJVW (ICAO) / JVW (FAA), in Raymond, Mississippi.