Baltimore, Maryland · field elev 143 ft
Density Altitude at Baltimore/Washington International Thurgood Marshall (KBWI)
Baltimore/Washington International Thurgood Marshall sits at 143 ft, and even a typical July afternoon (89 °F) only lifts density altitude to about 2,088 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 | 34.3 | −1,479 ft | 43.2 | −864 ft |
| February | 36.6 | −1,319 ft | 46.4 | −647 ft |
| March | 44.3 | −789 ft | 54.8 | −83 ft |
| April | 55.0 | −70 ft | 66.5 | 684 ft |
| May | 64.4 | 548 ft | 75.5 | 1,259 ft |
| June | 73.5 | 1,132 ft | 84.4 | 1,817 ft |
| July | 78.3 | 1,436 ft | 88.8 | 2,088 ft |
| August | 76.2 | 1,303 ft | 86.5 | 1,947 ft |
| September | 69.2 | 858 ft | 79.7 | 1,524 ft |
| October | 57.4 | 89 ft | 68.3 | 800 ft |
| November | 46.9 | −613 ft | 57.3 | 83 ft |
| December | 38.6 | −1,181 ft | 47.5 | −572 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 KBWI
DENSITY ALTITUDE
Field elevation 143 ft — the air behaves like 2,100 ft.
- PRESSURE ALT
- 144 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
- KFME — Fort Meade Exec
Fort Meade (Odenton) · elev 150 ft
- W48 — Essex Skypark
Baltimore · elev 14 ft
- KANP — Lee
Annapolis · elev 34 ft
- W00 — Freeway
Bowie · elev 168 ft
- KMTN — Martin State
Baltimore · elev 22 ft
- KCGS — College Park
College Park · elev 49 ft
- W29 — Bay Bridge
Stevensville · elev 15 ft
- 3W3 — Kentmorr Airpark
Stevensville · elev 10 ft
Frequently asked questions
How high does density altitude get at KBWI in summer?
On a typical July afternoon — around 89 °F at the nearest NOAA normals station — density altitude at Baltimore/Washington International Thurgood Marshall reaches roughly 2,088 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 KBWI on an average day?
It swings with the seasons: from roughly −1,479 ft at the coldest month's average temperature to about 1,436 ft at the warmest month's — all from a constant field elevation of 143 ft. The month-by-month table above carries the full year.
What is the field elevation of Baltimore/Washington International Thurgood Marshall?
143 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KBWI (ICAO) / BWI (FAA), in Baltimore, Maryland.