Thompsonville, Michigan · field elev 793 ft
Density Altitude at Thompsonville (7Y2)
Thompsonville sits at 793 ft, and even a typical July afternoon (80 °F) only lifts density altitude to about 2,306 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 | 23.2 | −1,450 ft | 29.3 | −1,018 ft |
| February | 24.3 | −1,372 ft | 31.4 | −870 ft |
| March | 32.4 | −800 ft | 41.5 | −172 ft |
| April | 43.5 | −36 ft | 53.6 | 641 ft |
| May | 55.3 | 754 ft | 66.4 | 1,477 ft |
| June | 64.6 | 1,361 ft | 75.6 | 2,062 ft |
| July | 69.2 | 1,656 ft | 79.5 | 2,306 ft |
| August | 68.0 | 1,579 ft | 78.1 | 2,219 ft |
| September | 61.5 | 1,160 ft | 71.4 | 1,796 ft |
| October | 49.7 | 382 ft | 58.1 | 938 ft |
| November | 38.2 | −398 ft | 44.7 | 45 ft |
| December | 28.4 | −1,081 ft | 34.0 | −689 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 7Y2
DENSITY ALTITUDE
Field elevation 793 ft — the air behaves like 2,337 ft.
- PRESSURE ALT
- 794 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
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Traverse City · elev 820 ft
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Frankfort · elev 633 ft
- 4Y9 — Eagles Landing
Harrietta · elev 993 ft
- Y87 — William B Bolton
Empire · elev 944 ft
- KMBL — Manistee County/Blacker
Manistee · elev 621 ft
- KTVC — Cherry Capital
Traverse City · elev 624 ft
- KCAD — Wexford County
Cadillac · elev 1,307 ft
Frequently asked questions
How high does density altitude get at 7Y2 in summer?
On a typical July afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Thompsonville reaches roughly 2,306 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 7Y2 on an average day?
It swings with the seasons: from roughly −1,450 ft at the coldest month's average temperature to about 1,656 ft at the warmest month's — all from a constant field elevation of 793 ft. The month-by-month table above carries the full year.
What is the field elevation of Thompsonville?
793 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 7Y2 (FAA), in Thompsonville, Michigan.