Lynden, Washington · field elev 106 ft
Density Altitude at Lynden Municipal/Jansen Field (38W)
Lynden Municipal/Jansen Field sits at 106 ft, and even a typical August afternoon (77 °F) only lifts density altitude to about 1,277 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 | 37.8 | −1,282 ft | 43.5 | −890 ft |
| February | 40.4 | −1,103 ft | 47.5 | −618 ft |
| March | 44.3 | −835 ft | 52.8 | −262 ft |
| April | 49.2 | −503 ft | 59.1 | 156 ft |
| May | 55.5 | −82 ft | 66.3 | 625 ft |
| June | 59.7 | 195 ft | 70.2 | 876 ft |
| July | 63.6 | 450 ft | 76.0 | 1,246 ft |
| August | 63.4 | 437 ft | 76.5 | 1,277 ft |
| September | 58.7 | 129 ft | 71.0 | 928 ft |
| October | 50.5 | −416 ft | 59.3 | 169 ft |
| November | 42.7 | −945 ft | 49.1 | −510 ft |
| December | 37.5 | −1,303 ft | 42.8 | −938 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 38W
DENSITY ALTITUDE
Field elevation 106 ft — the air behaves like 1,309 ft.
- PRESSURE ALT
- 107 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
- KBLI — Bellingham International
Bellingham · elev 171 ft
- KORS — Orcas Island
Eastsound · elev 35 ft
- 1RL — Point Roberts Airpark
Point Roberts · elev 11 ft
- 74S — Anacortes
Anacortes · elev 246 ft
- KBVS — Skagit Regional
Burlington/Mount Vernon · elev 145 ft
- S31 — Lopez Island
Lopez · elev 209 ft
- KFHR — Friday Harbor
Friday Harbor · elev 113 ft
- 3W5 — Mears Field
Concrete · elev 267 ft
Frequently asked questions
How high does density altitude get at 38W in summer?
On a typical August afternoon — around 77 °F at the nearest NOAA normals station — density altitude at Lynden Municipal/Jansen Field reaches roughly 1,277 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 38W on an average day?
It swings with the seasons: from roughly −1,303 ft at the coldest month's average temperature to about 450 ft at the warmest month's — all from a constant field elevation of 106 ft. The month-by-month table above carries the full year.
What is the field elevation of Lynden Municipal/Jansen Field?
106 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 38W (FAA), in Lynden, Washington.