Boulder, Colorado · field elev 5,288 ft
Density Altitude at Boulder Municipal (KBDU)
Boulder Municipal is a genuine high-and-hot field: from 5,288 ft of elevation, a typical July afternoon (88 °F) pushes density altitude to about 8,285 ft — the airplane performs like it is 2,997 ft above the field before the wheels roll.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 34.3 | 4,920 ft | 47.0 | 5,755 ft ▲ |
| February | 35.3 | 4,986 ft | 48.3 | 5,839 ft ▲ |
| March | 43.0 | 5,495 ft | 57.0 | 6,395 ft ▲ |
| April | 48.7 | 5,865 ft | 62.8 | 6,759 ft ▲ |
| May | 57.0 | 6,395 ft | 71.3 | 7,283 ft ▲ |
| June | 66.8 | 7,007 ft | 82.5 | 7,959 ft ▲ |
| July | 72.5 | 7,357 ft | 88.0 | 8,285 ft ⚠ |
| August | 70.7 | 7,247 ft | 86.0 | 8,167 ft ⚠ |
| September | 63.5 | 6,802 ft | 78.8 | 7,738 ft ▲ |
| October | 51.6 | 6,051 ft | 65.9 | 6,951 ft ▲ |
| November | 41.3 | 5,383 ft | 54.5 | 6,236 ft ▲ |
| December | 33.7 | 4,879 ft | 46.3 | 5,710 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 KBDU
DENSITY ALTITUDE high DA
Field elevation 5,288 ft — the air behaves like 8,285 ft.
- PRESSURE ALT
- 5,290 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 Colorado fields
- KLMO — Vance Brand
Longmont · elev 5,055 ft
- KEIK — Erie Municipal
Erie · elev 5,119 ft
- KBJC — Rocky Mountain Metro
Denver · elev 5,673 ft
- 18V — Platte Valley Airpark
Hudson · elev 4,965 ft
- KFNL — Northern Colorado Regional
Fort Collins/Loveland · elev 5,020 ft
- KDEN — Denver International
Denver · elev 5,434 ft
- KGNB — Granby-Grand County
Granby · elev 8,207 ft
- KAPA — Centennial
Denver · elev 5,885 ft
Frequently asked questions
How high does density altitude get at KBDU in summer?
On a typical July afternoon — around 88 °F at the nearest NOAA normals station — density altitude at Boulder Municipal reaches roughly 8,285 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 KBDU on an average day?
It swings with the seasons: from roughly 4,879 ft at the coldest month's average temperature to about 7,357 ft at the warmest month's — all from a constant field elevation of 5,288 ft. The month-by-month table above carries the full year.
What is the field elevation of Boulder Municipal?
5,288 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KBDU (ICAO) / BDU (FAA), in Boulder, Colorado.