Bluffton, Indiana · field elev 845 ft
Density Altitude at Miller (C40)
Miller sits at 845 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,562 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 | 24.5 | −1,292 ft | 31.9 | −770 ft |
| February | 27.4 | −1,086 ft | 35.6 | −513 ft |
| March | 37.3 | −396 ft | 46.7 | 245 ft |
| April | 49.3 | 419 ft | 59.9 | 1,120 ft |
| May | 60.8 | 1,179 ft | 71.1 | 1,841 ft |
| June | 70.0 | 1,771 ft | 79.6 | 2,376 ft |
| July | 73.0 | 1,961 ft | 82.6 | 2,562 ft |
| August | 71.0 | 1,835 ft | 80.9 | 2,457 ft |
| September | 64.7 | 1,431 ft | 75.6 | 2,125 ft |
| October | 52.8 | 653 ft | 63.2 | 1,334 ft |
| November | 40.6 | −169 ft | 48.9 | 393 ft |
| December | 30.1 | −896 ft | 37.2 | −402 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 C40
DENSITY ALTITUDE
Field elevation 845 ft — the air behaves like 2,587 ft.
- PRESSURE ALT
- 846 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 Indiana fields
- KHHG — Huntington Municipal
Huntington · elev 806 ft
- KFWA — Fort Wayne International
Fort Wayne · elev 815 ft
- KPLD — Portland Municipal
Portland · elev 925 ft
- KMZZ — Marion Municipal - Mckinney Field
Marion · elev 859 ft
- KIWH — Wabash Municipal
Wabash · elev 796 ft
- KSMD — Smith Field
Fort Wayne · elev 836 ft
- KMIE — Delaware County Regional
Muncie · elev 937 ft
- 1I8 — Converse
Converse · elev 840 ft
Frequently asked questions
How high does density altitude get at C40 in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Miller reaches roughly 2,562 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 C40 on an average day?
It swings with the seasons: from roughly −1,292 ft at the coldest month's average temperature to about 1,961 ft at the warmest month's — all from a constant field elevation of 845 ft. The month-by-month table above carries the full year.
What is the field elevation of Miller?
845 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is C40 (FAA), in Bluffton, Indiana.