Churchville, Maryland · field elev 412 ft
Density Altitude at Harford County (0W3)
Harford County sits at 412 ft, and even a typical July afternoon (88 °F) only lifts density altitude to about 2,336 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 | 32.5 | −1,269 ft | 40.1 | −742 ft |
| February | 34.6 | −1,123 ft | 43.0 | −544 ft |
| March | 42.3 | −591 ft | 51.0 | −3 ft |
| April | 53.9 | 190 ft | 63.9 | 847 ft |
| May | 63.7 | 834 ft | 73.5 | 1,462 ft |
| June | 73.3 | 1,450 ft | 82.7 | 2,040 ft |
| July | 78.0 | 1,746 ft | 87.5 | 2,336 ft |
| August | 76.2 | 1,633 ft | 85.3 | 2,201 ft |
| September | 69.4 | 1,201 ft | 78.8 | 1,796 ft |
| October | 57.4 | 422 ft | 66.9 | 1,040 ft |
| November | 45.8 | −353 ft | 55.0 | 263 ft |
| December | 37.8 | −901 ft | 45.0 | −408 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 0W3
DENSITY ALTITUDE
Field elevation 412 ft — the air behaves like 2,367 ft.
- PRESSURE ALT
- 413 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 Maryland fields
- W42 — Fallston
Fallston · elev 460 ft
- 58M — Claremont
Elkton · elev 106 ft
- KMTN — Martin State
Baltimore · elev 22 ft
- W48 — Essex Skypark
Baltimore · elev 14 ft
- MD1 — Massey Aerodrome
Massey · elev 73 ft
- KBWI — Baltimore/Washington International Thurgood Marshall
Baltimore · elev 143 ft
- W29 — Bay Bridge
Stevensville · elev 15 ft
- KDMW — Carroll County Regional/Jack B Poage Field
Westminster · elev 789 ft
Frequently asked questions
How high does density altitude get at 0W3 in summer?
On a typical July afternoon — around 88 °F at the nearest NOAA normals station — density altitude at Harford County reaches roughly 2,336 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 0W3 on an average day?
It swings with the seasons: from roughly −1,269 ft at the coldest month's average temperature to about 1,746 ft at the warmest month's — all from a constant field elevation of 412 ft. The month-by-month table above carries the full year.
What is the field elevation of Harford County?
412 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 0W3 (FAA), in Churchville, Maryland.