Collinsville, Texas · field elev 720 ft
Density Altitude at Sudden Stop (T32)
Sudden Stop sits at 720 ft, and even a typical August afternoon (94 °F) only lifts density altitude to about 3,125 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 | 42.2 | −215 ft | 52.6 | 485 ft |
| February | 46.5 | 76 ft | 57.6 | 815 ft |
| March | 54.2 | 591 ft | 65.5 | 1,329 ft |
| April | 62.2 | 1,116 ft | 73.5 | 1,840 ft |
| May | 70.0 | 1,618 ft | 80.0 | 2,248 ft |
| June | 78.6 | 2,161 ft | 88.5 | 2,773 ft |
| July | 83.1 | 2,441 ft | 93.5 | 3,077 ft |
| August | 83.3 | 2,453 ft | 94.3 | 3,125 ft |
| September | 75.9 | 1,991 ft | 86.6 | 2,656 ft |
| October | 64.9 | 1,290 ft | 76.0 | 1,998 ft |
| November | 53.1 | 518 ft | 63.5 | 1,200 ft |
| December | 44.3 | −72 ft | 54.5 | 611 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 T32
DENSITY ALTITUDE
Field elevation 720 ft — the air behaves like 3,107 ft.
- PRESSURE ALT
- 721 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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- T47 — Finney Field
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- 9S1 — Four Winds
Celina · elev 790 ft
- KGYI — North Texas Regional/Perrin Field
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- T80 — Bishop'S Landing
Celina · elev 750 ft
- KGLE — Gainesville Municipal
Gainesville · elev 846 ft
Frequently asked questions
How high does density altitude get at T32 in summer?
On a typical August afternoon — around 94 °F at the nearest NOAA normals station — density altitude at Sudden Stop reaches roughly 3,125 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 T32 on an average day?
It swings with the seasons: from roughly −215 ft at the coldest month's average temperature to about 2,453 ft at the warmest month's — all from a constant field elevation of 720 ft. The month-by-month table above carries the full year.
What is the field elevation of Sudden Stop?
720 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is T32 (FAA), in Collinsville, Texas.