Thomaston, Georgia · field elev 798 ft
Density Altitude at Thomaston-Upson County (KOPN)
Thomaston-Upson County sits at 798 ft, and even a typical July afternoon (91 °F) only lifts density altitude to about 2,990 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 | 45.3 | 92 ft | 56.2 | 819 ft |
| February | 48.4 | 301 ft | 59.8 | 1,055 ft |
| March | 55.0 | 740 ft | 67.1 | 1,528 ft |
| April | 62.4 | 1,225 ft | 74.5 | 1,999 ft |
| May | 70.4 | 1,739 ft | 81.8 | 2,455 ft |
| June | 77.1 | 2,162 ft | 87.3 | 2,794 ft |
| July | 80.2 | 2,356 ft | 90.5 | 2,990 ft |
| August | 79.5 | 2,312 ft | 89.4 | 2,923 ft |
| September | 74.1 | 1,973 ft | 84.9 | 2,647 ft |
| October | 64.0 | 1,328 ft | 75.8 | 2,080 ft |
| November | 54.0 | 674 ft | 65.8 | 1,444 ft |
| December | 47.2 | 220 ft | 57.6 | 911 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 KOPN
DENSITY ALTITUDE
Field elevation 798 ft — the air behaves like 3,020 ft.
- PRESSURE ALT
- 799 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 Georgia fields
- GA2 — Peach State Aerodrome
Williamson · elev 926 ft
- 6A2 — Griffin-Spalding County
Griffin · elev 958 ft
- 5A9 — Roosevelt Meml
Warm Springs · elev 882 ft
- 6A1 — Butler Municipal
Butler · elev 667 ft
- KHMP — Atlanta Speedway
Atlanta · elev 882 ft
- KFFC — Atlanta Regional Falcon Field
Atlanta · elev 808 ft
- KPIM — Harris County
Pine Mountain · elev 902 ft
- KCCO — Newnan Coweta County
Atlanta · elev 970 ft
Frequently asked questions
How high does density altitude get at KOPN in summer?
On a typical July afternoon — around 91 °F at the nearest NOAA normals station — density altitude at Thomaston-Upson County reaches roughly 2,990 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 KOPN on an average day?
It swings with the seasons: from roughly 92 ft at the coldest month's average temperature to about 2,356 ft at the warmest month's — all from a constant field elevation of 798 ft. The month-by-month table above carries the full year.
What is the field elevation of Thomaston-Upson County?
798 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KOPN (ICAO) / OPN (FAA), in Thomaston, Georgia.