Monroe, Washington · field elev 50 ft
Density Altitude at First Air Field (W16)
First Air Field sits at 50 ft, and even a typical August afternoon (75 °F) only lifts density altitude to about 1,095 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 | 38.0 | −1,338 ft | 44.0 | −925 ft |
| February | 39.8 | −1,214 ft | 47.6 | −681 ft |
| March | 43.4 | −966 ft | 52.0 | −385 ft |
| April | 48.0 | −654 ft | 57.4 | −26 ft |
| May | 53.9 | −258 ft | 63.9 | 401 ft |
| June | 58.3 | 34 ft | 68.0 | 666 ft |
| July | 63.0 | 342 ft | 74.2 | 1,063 ft |
| August | 63.1 | 349 ft | 74.7 | 1,095 ft |
| September | 58.1 | 21 ft | 68.7 | 711 ft |
| October | 49.5 | −553 ft | 57.7 | −6 ft |
| November | 41.9 | −1,069 ft | 48.5 | −620 ft |
| December | 37.1 | −1,400 ft | 42.7 | −1,014 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 W16
DENSITY ALTITUDE
Field elevation 50 ft — the air behaves like 1,114 ft.
- PRESSURE ALT
- 51 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
- S43 — Harvey Field
Snohomish · elev 23 ft
- KPAE — Seattle Paine Field International
Everett · elev 607 ft
- KAWO — Arlington Municipal
Arlington · elev 142 ft
- W10 — Whidbey Air Park
Langley · elev 271 ft
- KBFI — Boeing Field/King County International
Seattle · elev 22 ft
- KRNT — Renton Municipal
Renton · elev 32 ft
- 1S2 — Darrington Municipal
Darrington · elev 553 ft
- S88 — Skykomish State
Skykomish · elev 1,002 ft
Frequently asked questions
How high does density altitude get at W16 in summer?
On a typical August afternoon — around 75 °F at the nearest NOAA normals station — density altitude at First Air Field reaches roughly 1,095 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 W16 on an average day?
It swings with the seasons: from roughly −1,400 ft at the coldest month's average temperature to about 349 ft at the warmest month's — all from a constant field elevation of 50 ft. The month-by-month table above carries the full year.
What is the field elevation of First Air Field?
50 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is W16 (FAA), in Monroe, Washington.