Jackson, Michigan · field elev 1,001 ft
Density Altitude at Jackson County/Reynolds Field (KJXN)
Jackson County/Reynolds Field sits at 1,001 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,746 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 | 24.4 | −1,104 ft | 31.3 | −617 ft |
| February | 26.6 | −948 ft | 34.5 | −395 ft |
| March | 36.0 | −291 ft | 45.3 | 344 ft |
| April | 47.8 | 512 ft | 58.5 | 1,221 ft |
| May | 58.8 | 1,240 ft | 69.8 | 1,950 ft |
| June | 68.0 | 1,835 ft | 78.9 | 2,523 ft |
| July | 71.6 | 2,064 ft | 82.5 | 2,746 ft |
| August | 69.9 | 1,956 ft | 80.4 | 2,616 ft |
| September | 62.6 | 1,488 ft | 73.6 | 2,191 ft |
| October | 51.2 | 739 ft | 61.1 | 1,390 ft |
| November | 39.9 | −23 ft | 47.7 | 506 ft |
| December | 29.9 | −715 ft | 36.2 | −277 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 KJXN
DENSITY ALTITUDE
Field elevation 1,001 ft — the air behaves like 2,777 ft.
- PRESSURE ALT
- 1,002 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 Michigan fields
- 6H4 — Van Wagnen
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- 3NP — Napoleon
Napoleon · elev 963 ft
- 26W — Wolf Lake
Napoleon · elev 980 ft
- 6G8 — Brooklyn
Brooklyn · elev 981 ft
- KTEW — Mason Jewett Field
Mason · elev 919 ft
- 75G — Rossettie
Manchester · elev 1,005 ft
- 69G — Richmond Field
Gregory · elev 921 ft
- KJYM — Hillsdale Municipal
Hillsdale · elev 1,184 ft
Frequently asked questions
How high does density altitude get at KJXN in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Jackson County/Reynolds Field reaches roughly 2,746 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 KJXN on an average day?
It swings with the seasons: from roughly −1,104 ft at the coldest month's average temperature to about 2,064 ft at the warmest month's — all from a constant field elevation of 1,001 ft. The month-by-month table above carries the full year.
What is the field elevation of Jackson County/Reynolds Field?
1,001 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KJXN (ICAO) / JXN (FAA), in Jackson, Michigan.