Westphalia, Michigan · field elev 772 ft
Density Altitude at Forest Hill (3F5)
Forest Hill sits at 772 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,510 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 | −1,405 ft | 30.6 | −952 ft |
| February | 25.8 | −1,291 ft | 33.0 | −785 ft |
| March | 34.9 | −653 ft | 43.7 | −49 ft |
| April | 46.6 | 148 ft | 56.9 | 833 ft |
| May | 58.8 | 958 ft | 69.3 | 1,637 ft |
| June | 68.8 | 1,605 ft | 78.9 | 2,243 ft |
| July | 72.8 | 1,859 ft | 83.2 | 2,510 ft |
| August | 71.0 | 1,745 ft | 81.3 | 2,392 ft |
| September | 63.9 | 1,290 ft | 74.8 | 1,986 ft |
| October | 52.2 | 523 ft | 61.7 | 1,147 ft |
| November | 40.0 | −301 ft | 47.3 | 195 ft |
| December | 30.0 | −995 ft | 36.0 | −576 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 3F5
DENSITY ALTITUDE
Field elevation 772 ft — the air behaves like 2,498 ft.
- PRESSURE ALT
- 773 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
- 51C — Orban
Dewitt · elev 882 ft
- 97G — Glowacki
St Johns · elev 775 ft
- 4D0 — Abrams Municipal
Grand Ledge · elev 841 ft
- KLAN — Capital Region International
Lansing · elev 861 ft
- 41G — University Airpark
Bath · elev 856 ft
- M99 — Shady Lane
St Johns · elev 680 ft
- 39T — Tripp Creek
St Johns · elev 717 ft
- 3S5 — Schiffer Acres
St Johns · elev 741 ft
Frequently asked questions
How high does density altitude get at 3F5 in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Forest Hill reaches roughly 2,510 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 3F5 on an average day?
It swings with the seasons: from roughly −1,405 ft at the coldest month's average temperature to about 1,859 ft at the warmest month's — all from a constant field elevation of 772 ft. The month-by-month table above carries the full year.
What is the field elevation of Forest Hill?
772 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 3F5 (FAA), in Westphalia, Michigan.