Quinlan, Texas · field elev 473 ft
Density Altitude at Rockin M (T14)
Rockin M sits at 473 ft, and even a typical August afternoon (95 °F) only lifts density altitude to about 2,837 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 | 44.2 | −386 ft | 54.6 | 312 ft |
| February | 48.0 | −129 ft | 58.9 | 596 ft |
| March | 55.4 | 365 ft | 66.5 | 1,090 ft |
| April | 63.0 | 863 ft | 74.3 | 1,588 ft |
| May | 71.7 | 1,423 ft | 81.8 | 2,058 ft |
| June | 79.6 | 1,921 ft | 89.5 | 2,533 ft |
| July | 83.3 | 2,151 ft | 93.6 | 2,782 ft |
| August | 83.5 | 2,164 ft | 94.5 | 2,837 ft |
| September | 76.6 | 1,733 ft | 87.9 | 2,435 ft |
| October | 65.5 | 1,025 ft | 77.6 | 1,796 ft |
| November | 54.7 | 319 ft | 65.6 | 1,032 ft |
| December | 46.2 | −250 ft | 56.5 | 438 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 T14
DENSITY ALTITUDE
Field elevation 473 ft — the air behaves like 2,867 ft.
- PRESSURE ALT
- 474 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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Frequently asked questions
How high does density altitude get at T14 in summer?
On a typical August afternoon — around 95 °F at the nearest NOAA normals station — density altitude at Rockin M reaches roughly 2,837 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 T14 on an average day?
It swings with the seasons: from roughly −386 ft at the coldest month's average temperature to about 2,164 ft at the warmest month's — all from a constant field elevation of 473 ft. The month-by-month table above carries the full year.
What is the field elevation of Rockin M?
473 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is T14 (FAA), in Quinlan, Texas.