Napoleon, Michigan · field elev 963 ft
Density Altitude at Napoleon (3NP)
Napoleon sits at 963 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,731 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 | 23.3 | −1,230 ft | 31.4 | −658 ft |
| February | 25.3 | −1,087 ft | 34.9 | −414 ft |
| March | 35.2 | −394 ft | 45.3 | 297 ft |
| April | 46.8 | 398 ft | 58.3 | 1,161 ft |
| May | 58.4 | 1,167 ft | 70.1 | 1,922 ft |
| June | 67.5 | 1,756 ft | 79.0 | 2,483 ft |
| July | 71.2 | 1,992 ft | 83.0 | 2,731 ft |
| August | 69.9 | 1,909 ft | 81.0 | 2,607 ft |
| September | 62.6 | 1,441 ft | 74.6 | 2,207 ft |
| October | 50.7 | 659 ft | 61.9 | 1,395 ft |
| November | 38.9 | −139 ft | 47.7 | 458 ft |
| December | 29.4 | −798 ft | 36.5 | −304 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 3NP
DENSITY ALTITUDE
Field elevation 963 ft — the air behaves like 2,731 ft.
- PRESSURE ALT
- 964 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 Michigan fields
- 26W — Wolf Lake
Napoleon · elev 980 ft
- 6H4 — Van Wagnen
Napoleon · elev 988 ft
- 6G8 — Brooklyn
Brooklyn · elev 981 ft
- 75G — Rossettie
Manchester · elev 1,005 ft
- KJXN — Jackson County/Reynolds Field
Jackson · elev 1,001 ft
- 7N4 — Raymond L Kussmaul Jr Meml
Clinton · elev 825 ft
- 3TE — Al Meyers
Tecumseh · elev 812 ft
- 69G — Richmond Field
Gregory · elev 921 ft
Frequently asked questions
How high does density altitude get at 3NP in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Napoleon reaches roughly 2,731 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 3NP on an average day?
It swings with the seasons: from roughly −1,230 ft at the coldest month's average temperature to about 1,992 ft at the warmest month's — all from a constant field elevation of 963 ft. The month-by-month table above carries the full year.
What is the field elevation of Napoleon?
963 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 3NP (FAA), in Napoleon, Michigan.