Napoleon, Ohio · field elev 683 ft
Density Altitude at Henry County (7W5)
Henry County sits at 683 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 2,445 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 | 25.1 | −1,452 ft | 32.8 | −910 ft |
| February | 27.2 | −1,303 ft | 35.5 | −722 ft |
| March | 36.9 | −625 ft | 46.1 | 3 ft |
| April | 48.4 | 158 ft | 59.6 | 900 ft |
| May | 60.7 | 972 ft | 71.5 | 1,668 ft |
| June | 70.3 | 1,591 ft | 80.8 | 2,253 ft |
| July | 73.5 | 1,795 ft | 83.9 | 2,445 ft |
| August | 71.7 | 1,680 ft | 83.0 | 2,389 ft |
| September | 64.6 | 1,225 ft | 76.3 | 1,971 ft |
| October | 53.0 | 466 ft | 63.7 | 1,167 ft |
| November | 40.6 | −371 ft | 49.1 | 205 ft |
| December | 30.6 | −1,064 ft | 37.4 | −590 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 7W5
DENSITY ALTITUDE
Field elevation 683 ft — the air behaves like 2,451 ft.
- PRESSURE ALT
- 684 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 Ohio fields
- 6D7 — Deshler Municipal Landing Strip
Deshler · elev 706 ft
- KUSE — Fulton County
Wauseon · elev 781 ft
- R47 — Ruhes
Leipsic · elev 801 ft
- KDFI — Defiance Meml
Defiance · elev 707 ft
- KTOL — Eugene F Kranz Toledo Express
Toledo · elev 684 ft
- 1G0 — Wood County Regional
Bowling Green · elev 673 ft
- 0G6 — Williams County
Bryan · elev 730 ft
- KOWX — Putnam County
Ottawa · elev 764 ft
Frequently asked questions
How high does density altitude get at 7W5 in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Henry County reaches roughly 2,445 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 7W5 on an average day?
It swings with the seasons: from roughly −1,452 ft at the coldest month's average temperature to about 1,795 ft at the warmest month's — all from a constant field elevation of 683 ft. The month-by-month table above carries the full year.
What is the field elevation of Henry County?
683 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 7W5 (FAA), in Napoleon, Ohio.