Concrete, Washington · field elev 267 ft
Density Altitude at Mears Field (3W5)
Mears Field sits at 267 ft, and even a typical August afternoon (77 °F) only lifts density altitude to about 1,487 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 | 38.1 | −1,061 ft | 42.7 | −744 ft |
| February | 40.3 | −909 ft | 46.9 | −459 ft |
| March | 43.9 | −663 ft | 51.7 | −136 ft |
| April | 49.1 | −310 ft | 58.3 | 302 ft |
| May | 55.3 | 104 ft | 65.3 | 759 ft |
| June | 59.4 | 374 ft | 69.0 | 997 ft |
| July | 64.3 | 694 ft | 75.6 | 1,418 ft |
| August | 65.2 | 752 ft | 76.7 | 1,487 ft |
| September | 60.4 | 440 ft | 70.8 | 1,112 ft |
| October | 51.7 | −136 ft | 59.4 | 374 ft |
| November | 43.2 | −710 ft | 48.6 | −344 ft |
| December | 37.9 | −1,074 ft | 42.2 | −779 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 3W5
DENSITY ALTITUDE
Field elevation 267 ft — the air behaves like 1,506 ft.
- PRESSURE ALT
- 268 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 Washington fields
- 1S2 — Darrington Municipal
Darrington · elev 553 ft
- KBVS — Skagit Regional
Burlington/Mount Vernon · elev 145 ft
- KAWO — Arlington Municipal
Arlington · elev 142 ft
- 13W — Camano Island Airfield
Stanwood · elev 145 ft
- KBLI — Bellingham International
Bellingham · elev 171 ft
- 74S — Anacortes
Anacortes · elev 246 ft
- 38W — Lynden Municipal/Jansen Field
Lynden · elev 106 ft
- S43 — Harvey Field
Snohomish · elev 23 ft
Frequently asked questions
How high does density altitude get at 3W5 in summer?
On a typical August afternoon — around 77 °F at the nearest NOAA normals station — density altitude at Mears Field reaches roughly 1,487 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 3W5 on an average day?
It swings with the seasons: from roughly −1,074 ft at the coldest month's average temperature to about 752 ft at the warmest month's — all from a constant field elevation of 267 ft. The month-by-month table above carries the full year.
What is the field elevation of Mears Field?
267 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 3W5 (FAA), in Concrete, Washington.