Leonardtown, Maryland · field elev 142 ft
Density Altitude at St Mary'S County Regional (2W6)
St Mary'S County Regional sits at 142 ft, and even a typical July afternoon (88 °F) only lifts density altitude to about 2,032 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 | 37.7 | −1,244 ft | 45.3 | −723 ft |
| February | 39.2 | −1,140 ft | 47.6 | −567 ft |
| March | 46.3 | −655 ft | 54.9 | −77 ft |
| April | 56.4 | 22 ft | 65.4 | 611 ft |
| May | 66.0 | 650 ft | 74.2 | 1,176 ft |
| June | 75.7 | 1,271 ft | 83.8 | 1,778 ft |
| July | 80.3 | 1,560 ft | 87.9 | 2,032 ft |
| August | 78.7 | 1,460 ft | 86.3 | 1,933 ft |
| September | 72.4 | 1,061 ft | 79.9 | 1,535 ft |
| October | 61.0 | 325 ft | 68.7 | 824 ft |
| November | 50.8 | −351 ft | 58.6 | 167 ft |
| December | 42.3 | −927 ft | 50.1 | −398 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 2W6
DENSITY ALTITUDE
Field elevation 142 ft — the air behaves like 2,038 ft.
- PRESSURE ALT
- 143 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
- KCGE — Cambridge-Dorchester Regional
Cambridge · elev 20 ft
- 2W5 — Maryland
Indian Head · elev 175 ft
- KVKX — Potomac Airfield
Friendly · elev 118 ft
- KESN — Easton/Newnam Field
Easton · elev 72 ft
- 3W3 — Kentmorr Airpark
Stevensville · elev 10 ft
- KANP — Lee
Annapolis · elev 34 ft
- W41 — Crisfield-Somerset County
Crisfield · elev 4 ft
- W00 — Freeway
Bowie · elev 168 ft
Frequently asked questions
How high does density altitude get at 2W6 in summer?
On a typical July afternoon — around 88 °F at the nearest NOAA normals station — density altitude at St Mary'S County Regional reaches roughly 2,032 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 2W6 on an average day?
It swings with the seasons: from roughly −1,244 ft at the coldest month's average temperature to about 1,560 ft at the warmest month's — all from a constant field elevation of 142 ft. The month-by-month table above carries the full year.
What is the field elevation of St Mary'S County Regional?
142 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 2W6 (FAA), in Leonardtown, Maryland.