Mason City, Iowa · field elev 1,213 ft
Density Altitude at Mason City Municipal (KMCW)
Mason City Municipal sits at 1,213 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 3,005 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 | 15.7 | −1,463 ft | 24.2 | −852 ft |
| February | 20.0 | −1,152 ft | 28.5 | −549 ft |
| March | 32.9 | −241 ft | 42.1 | 391 ft |
| April | 46.0 | 654 ft | 57.5 | 1,417 ft |
| May | 58.2 | 1,463 ft | 69.6 | 2,197 ft |
| June | 68.5 | 2,127 ft | 79.6 | 2,825 ft |
| July | 71.5 | 2,318 ft | 82.5 | 3,005 ft |
| August | 68.9 | 2,153 ft | 80.2 | 2,863 ft |
| September | 61.4 | 1,671 ft | 74.1 | 2,482 ft |
| October | 48.2 | 802 ft | 59.9 | 1,573 ft |
| November | 33.9 | −172 ft | 43.6 | 492 ft |
| December | 21.6 | −1,038 ft | 29.7 | −464 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 KMCW
DENSITY ALTITUDE
Field elevation 1,213 ft — the air behaves like 3,036 ft.
- PRESSURE ALT
- 1,214 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
- KFXY — Forest City Municipal/Trimble Field
Forest City · elev 1,229 ft
- 0Y6 — Lake Mills Municipal
Lake Mills · elev 1,260 ft
- 5D2 — Northwood Municipal
Northwood · elev 1,226 ft
- Y48 — Belmond Municipal
Belmond · elev 1,201 ft
- D02 — Osage Municipal
Osage · elev 1,168 ft
- KHPT — Hampton Municipal
Hampton · elev 1,176 ft
- KCAV — Clarion Municipal
Clarion · elev 1,157 ft
- KCCY — Northeast Iowa Regional
Charles City · elev 1,125 ft
Frequently asked questions
How high does density altitude get at KMCW in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Mason City Municipal reaches roughly 3,005 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 KMCW on an average day?
It swings with the seasons: from roughly −1,463 ft at the coldest month's average temperature to about 2,318 ft at the warmest month's — all from a constant field elevation of 1,213 ft. The month-by-month table above carries the full year.
What is the field elevation of Mason City Municipal?
1,213 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KMCW (ICAO) / MCW (FAA), in Mason City, Iowa.