Petersburg, Virginia · field elev 193 ft
Density Altitude at Tri Cities Exec/Dinwiddie County (KPTB)
Tri Cities Exec/Dinwiddie County sits at 193 ft, and even a typical July afternoon (89 °F) only lifts density altitude to about 2,180 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 | 38.7 | −1,111 ft | 49.1 | −402 ft |
| February | 40.7 | −974 ft | 52.2 | −194 ft |
| March | 48.1 | −470 ft | 60.1 | 329 ft |
| April | 58.0 | 191 ft | 70.4 | 996 ft |
| May | 66.6 | 752 ft | 78.2 | 1,491 ft |
| June | 74.8 | 1,276 ft | 85.5 | 1,946 ft |
| July | 79.2 | 1,554 ft | 89.3 | 2,180 ft |
| August | 77.4 | 1,440 ft | 87.4 | 2,063 ft |
| September | 71.1 | 1,041 ft | 81.5 | 1,697 ft |
| October | 59.8 | 309 ft | 71.6 | 1,073 ft |
| November | 49.4 | −382 ft | 61.5 | 420 ft |
| December | 41.6 | −912 ft | 52.6 | −168 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 KPTB
DENSITY ALTITUDE
Field elevation 193 ft — the air behaves like 2,161 ft.
- PRESSURE ALT
- 194 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 Virginia fields
- KFCI — Richmond Exec/Chesterfield County
Richmond · elev 236 ft
- KRIC — Richmond International
Richmond · elev 168 ft
- KBKT — Allan C Perkinson/Blackstone Aaf
Blackstone · elev 437 ft
- W96 — New Kent County
Quinton · elev 121 ft
- KAKQ — Wakefield Municipal
Wakefield · elev 111 ft
- KLVL — Brunswick County
Lawrenceville · elev 329 ft
- W81 — Crewe Municipal
Crewe · elev 422 ft
- KEMV — Emporia-Greensville Regional
Emporia · elev 127 ft
Frequently asked questions
How high does density altitude get at KPTB in summer?
On a typical July afternoon — around 89 °F at the nearest NOAA normals station — density altitude at Tri Cities Exec/Dinwiddie County reaches roughly 2,180 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 KPTB on an average day?
It swings with the seasons: from roughly −1,111 ft at the coldest month's average temperature to about 1,554 ft at the warmest month's — all from a constant field elevation of 193 ft. The month-by-month table above carries the full year.
What is the field elevation of Tri Cities Exec/Dinwiddie County?
193 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KPTB (ICAO) / PTB (FAA), in Petersburg, Virginia.