Bluefield, West Virginia · field elev 2,857 ft
Density Altitude at Mercer County (KBLF)
Mercer County sits at 2,857 ft, and even a typical July afternoon (79 °F) only lifts density altitude to about 4,788 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 | 31.9 | 1,739 ft | 39.9 | 2,282 ft |
| February | 34.9 | 1,944 ft | 43.4 | 2,517 ft |
| March | 42.2 | 2,437 ft | 51.4 | 3,046 ft |
| April | 52.7 | 3,131 ft | 62.7 | 3,775 ft |
| May | 60.3 | 3,622 ft | 69.7 | 4,217 ft |
| June | 67.1 | 4,054 ft | 76.0 | 4,609 ft |
| July | 70.3 | 4,255 ft | 78.9 | 4,788 ft |
| August | 69.3 | 4,192 ft | 77.9 | 4,726 ft |
| September | 63.5 | 3,826 ft | 72.5 | 4,392 ft |
| October | 53.7 | 3,196 ft | 62.8 | 3,782 ft |
| November | 43.5 | 2,524 ft | 52.2 | 3,098 ft |
| December | 35.5 | 1,985 ft | 43.2 | 2,504 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 KBLF
DENSITY ALTITUDE
Field elevation 2,857 ft — the air behaves like 4,794 ft.
- PRESSURE ALT
- 2,859 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 West Virginia fields
- I16 — Kee Field
Pineville · elev 1,783 ft
- KBKW — Raleigh County Meml
Beckley · elev 2,504 ft
- 6L4 — Logan County
Logan · elev 1,666 ft
- KEBD — Southern West Virginia Regional
Williamson · elev 1,883 ft
- KLWB — Greenbrier Valley
Lewisburg · elev 2,302 ft
- KSXL — Summersville
Summersville · elev 1,820 ft
- 3I4 — Richwood Municipal
Richwood · elev 2,486 ft
- KCRW — West Virginia International Yeager
Charleston · elev 947 ft
Frequently asked questions
How high does density altitude get at KBLF in summer?
On a typical July afternoon — around 79 °F at the nearest NOAA normals station — density altitude at Mercer County reaches roughly 4,788 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 KBLF on an average day?
It swings with the seasons: from roughly 1,739 ft at the coldest month's average temperature to about 4,255 ft at the warmest month's — all from a constant field elevation of 2,857 ft. The month-by-month table above carries the full year.
What is the field elevation of Mercer County?
2,857 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KBLF (ICAO) / BLF (FAA), in Bluefield, West Virginia.