Bannister, Michigan · field elev 683 ft
Density Altitude at Shady Lawn Field (4M4)
Shady Lawn Field sits at 683 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,402 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 | 24.2 | −1,517 ft | 30.6 | −1,064 ft |
| February | 25.8 | −1,403 ft | 33.0 | −896 ft |
| March | 34.9 | −764 ft | 43.7 | −159 ft |
| April | 46.6 | 37 ft | 56.9 | 723 ft |
| May | 58.8 | 848 ft | 69.3 | 1,527 ft |
| June | 68.8 | 1,495 ft | 78.9 | 2,134 ft |
| July | 72.8 | 1,750 ft | 83.2 | 2,402 ft |
| August | 71.0 | 1,636 ft | 81.3 | 2,284 ft |
| September | 63.9 | 1,180 ft | 74.8 | 1,877 ft |
| October | 52.2 | 412 ft | 61.7 | 1,037 ft |
| November | 40.0 | −412 ft | 47.3 | 84 ft |
| December | 30.0 | −1,106 ft | 36.0 | −687 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 4M4
DENSITY ALTITUDE
Field elevation 683 ft — the air behaves like 2,389 ft.
- PRESSURE ALT
- 684 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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- 39T — Tripp Creek
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- C88 — Tkaczyk Field
Oakley · elev 727 ft
- M99 — Shady Lane
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- 50G — Howard Nixon Meml
Chesaning · elev 641 ft
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- KRNP — Owosso Community
Owosso · elev 737 ft
Frequently asked questions
How high does density altitude get at 4M4 in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Shady Lawn Field reaches roughly 2,402 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 4M4 on an average day?
It swings with the seasons: from roughly −1,517 ft at the coldest month's average temperature to about 1,750 ft at the warmest month's — all from a constant field elevation of 683 ft. The month-by-month table above carries the full year.
What is the field elevation of Shady Lawn Field?
683 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 4M4 (FAA), in Bannister, Michigan.