Mason, Michigan · field elev 919 ft
Density Altitude at Mason Jewett Field (KTEW)
Mason Jewett Field sits at 919 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,677 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 | 24.7 | −1,185 ft | 31.8 | −685 ft |
| February | 26.6 | −1,050 ft | 34.4 | −504 ft |
| March | 36.0 | −393 ft | 44.9 | 215 ft |
| April | 47.5 | 390 ft | 57.7 | 1,067 ft |
| May | 59.3 | 1,172 ft | 70.2 | 1,875 ft |
| June | 68.5 | 1,766 ft | 79.4 | 2,454 ft |
| July | 72.1 | 1,995 ft | 83.0 | 2,677 ft |
| August | 70.6 | 1,900 ft | 81.4 | 2,578 ft |
| September | 63.6 | 1,451 ft | 75.5 | 2,210 ft |
| October | 51.5 | 658 ft | 61.6 | 1,322 ft |
| November | 40.2 | −104 ft | 48.2 | 437 ft |
| December | 30.3 | −790 ft | 37.1 | −317 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 KTEW
DENSITY ALTITUDE
Field elevation 919 ft — the air behaves like 2,677 ft.
- PRESSURE ALT
- 920 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
- 60G — Skyway Estates
Eaton Rapids · elev 931 ft
- KLAN — Capital Region International
Lansing · elev 861 ft
- 41G — University Airpark
Bath · elev 856 ft
- KFPK — Fitch H Beach
Charlotte · elev 891 ft
- 69G — Richmond Field
Gregory · elev 921 ft
- KJXN — Jackson County/Reynolds Field
Jackson · elev 1,001 ft
- 65G — Maple Grove
Fowlerville · elev 906 ft
- 4D0 — Abrams Municipal
Grand Ledge · elev 841 ft
Frequently asked questions
How high does density altitude get at KTEW in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Mason Jewett Field reaches roughly 2,677 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 KTEW on an average day?
It swings with the seasons: from roughly −1,185 ft at the coldest month's average temperature to about 1,995 ft at the warmest month's — all from a constant field elevation of 919 ft. The month-by-month table above carries the full year.
What is the field elevation of Mason Jewett Field?
919 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KTEW (ICAO) / TEW (FAA), in Mason, Michigan.