Ashland, Wisconsin · field elev 827 ft
Density Altitude at John F Kennedy Meml (KASX)
John F Kennedy Meml sits at 827 ft, and even a typical July afternoon (79 °F) only lifts density altitude to about 2,310 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 | 14.0 | −2,072 ft | 22.3 | −1,472 ft |
| February | 17.2 | −1,839 ft | 26.6 | −1,166 ft |
| March | 27.9 | −1,074 ft | 37.8 | −384 ft |
| April | 39.5 | −267 ft | 50.6 | 484 ft |
| May | 51.5 | 544 ft | 64.4 | 1,390 ft |
| June | 61.0 | 1,169 ft | 73.4 | 1,965 ft |
| July | 66.7 | 1,538 ft | 78.9 | 2,310 ft |
| August | 65.1 | 1,435 ft | 77.1 | 2,198 ft |
| September | 57.4 | 934 ft | 69.0 | 1,685 ft |
| October | 45.0 | 108 ft | 55.4 | 802 ft |
| November | 32.3 | −765 ft | 40.1 | −226 ft |
| December | 20.1 | −1,630 ft | 27.6 | −1,095 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 KASX
DENSITY ALTITUDE
Field elevation 827 ft — the air behaves like 2,316 ft.
- PRESSURE ALT
- 828 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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- Y77 — Bayfield County
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- 3CU — Cable Union
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- 5G4 — Eau Claire Lakes
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- KHYR — Sawyer County
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- KOLG — Solon Springs Municipal
Solon Springs · elev 1,102 ft
- KPKF — Park Falls Municipal
Park Falls · elev 1,501 ft
Frequently asked questions
How high does density altitude get at KASX in summer?
On a typical July afternoon — around 79 °F at the nearest NOAA normals station — density altitude at John F Kennedy Meml reaches roughly 2,310 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 KASX on an average day?
It swings with the seasons: from roughly −2,072 ft at the coldest month's average temperature to about 1,538 ft at the warmest month's — all from a constant field elevation of 827 ft. The month-by-month table above carries the full year.
What is the field elevation of John F Kennedy Meml?
827 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KASX (ICAO) / ASX (FAA), in Ashland, Wisconsin.