Belle Plaine, Iowa · field elev 771 ft
Density Altitude at Belle Plaine Municipal (KTZT)
Belle Plaine Municipal sits at 771 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 2,534 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 | 19.3 | −1,758 ft | 28.1 | −1,130 ft |
| February | 23.5 | −1,456 ft | 32.8 | −800 ft |
| March | 35.9 | −584 ft | 46.0 | 106 ft |
| April | 48.6 | 281 ft | 60.0 | 1,035 ft |
| May | 60.1 | 1,042 ft | 70.9 | 1,737 ft |
| June | 70.0 | 1,680 ft | 80.3 | 2,329 ft |
| July | 73.3 | 1,890 ft | 83.6 | 2,534 ft |
| August | 71.1 | 1,750 ft | 82.1 | 2,441 ft |
| September | 63.5 | 1,263 ft | 75.8 | 2,047 ft |
| October | 51.0 | 441 ft | 62.9 | 1,224 ft |
| November | 37.2 | −495 ft | 47.2 | 187 ft |
| December | 25.2 | −1,335 ft | 33.6 | −744 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 KTZT
DENSITY ALTITUDE
Field elevation 771 ft — the air behaves like 2,558 ft.
- PRESSURE ALT
- 772 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 Iowa fields
- 8C5 — Toledo Municipal
Toledo · elev 960 ft
- C11 — Amana
Amana · elev 712 ft
- 8C6 — Traer Municipal
Traer · elev 892 ft
- KGGI — Grinnell Regional
Grinnell · elev 1,008 ft
- KVTI — Vinton Veterans Meml Airpark
Vinton · elev 842 ft
- KCID — The Eastern Iowa
Cedar Rapids · elev 869 ft
- 8C2 — Sully Municipal
Sully · elev 922 ft
- KMIW — Marshalltown Municipal
Marshalltown · elev 975 ft
Frequently asked questions
How high does density altitude get at KTZT in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Belle Plaine Municipal reaches roughly 2,534 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 KTZT on an average day?
It swings with the seasons: from roughly −1,758 ft at the coldest month's average temperature to about 1,890 ft at the warmest month's — all from a constant field elevation of 771 ft. The month-by-month table above carries the full year.
What is the field elevation of Belle Plaine Municipal?
771 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KTZT (ICAO) / TZT (FAA), in Belle Plaine, Iowa.