Urbana, Ohio · field elev 1,150 ft
Density Altitude at Cook (38I)
Cook sits at 1,150 ft, and even a typical July afternoon (85 °F) only lifts density altitude to about 3,070 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 | 27.2 | −719 ft | 35.4 | −147 ft |
| February | 29.8 | −536 ft | 38.6 | 74 ft |
| March | 38.9 | 94 ft | 48.8 | 764 ft |
| April | 50.2 | 857 ft | 61.8 | 1,619 ft |
| May | 60.9 | 1,561 ft | 72.3 | 2,291 ft |
| June | 70.2 | 2,158 ft | 81.5 | 2,866 ft |
| July | 73.5 | 2,367 ft | 84.8 | 3,070 ft |
| August | 71.9 | 2,266 ft | 83.6 | 2,996 ft |
| September | 65.0 | 1,826 ft | 77.2 | 2,599 ft |
| October | 53.0 | 1,043 ft | 64.3 | 1,781 ft |
| November | 41.7 | 285 ft | 51.0 | 910 ft |
| December | 32.0 | −382 ft | 39.7 | 149 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 38I
DENSITY ALTITUDE
Field elevation 1,150 ft — the air behaves like 3,082 ft.
- PRESSURE ALT
- 1,151 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
- I74 — Grimes Field
Urbana · elev 1,068 ft
- I54 — Mad River Airpark
Tremont City · elev 958 ft
- KUYF — Madison County
London · elev 1,082 ft
- KSGH — Springfield/Beckley Municipal
Springfield · elev 1,051 ft
- KMRT — Union County
Marysville · elev 1,021 ft
- KEDJ — Bellefontaine Regional
Bellefontaine · elev 1,122 ft
- KSCA — Sidney Municipal
Sidney · elev 1,044 ft
- 1WF — Waco Field
Troy · elev 817 ft
Frequently asked questions
How high does density altitude get at 38I in summer?
On a typical July afternoon — around 85 °F at the nearest NOAA normals station — density altitude at Cook reaches roughly 3,070 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 38I on an average day?
It swings with the seasons: from roughly −719 ft at the coldest month's average temperature to about 2,367 ft at the warmest month's — all from a constant field elevation of 1,150 ft. The month-by-month table above carries the full year.
What is the field elevation of Cook?
1,150 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 38I (FAA), in Urbana, Ohio.