Greenville, Pennsylvania · field elev 1,206 ft
Density Altitude at Greenville Municipal (4G1)
Greenville Municipal sits at 1,206 ft, and even a typical July afternoon (81 °F) only lifts density altitude to about 2,910 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 | 25.0 | −804 ft | 33.7 | −194 ft |
| February | 26.4 | −705 ft | 36.3 | −15 ft |
| March | 34.7 | −125 ft | 45.2 | 592 ft |
| April | 46.9 | 706 ft | 59.1 | 1,513 ft |
| May | 57.6 | 1,415 ft | 69.5 | 2,182 ft |
| June | 66.0 | 1,959 ft | 77.5 | 2,686 ft |
| July | 69.9 | 2,208 ft | 81.1 | 2,910 ft |
| August | 68.4 | 2,112 ft | 79.7 | 2,823 ft |
| September | 62.0 | 1,701 ft | 73.6 | 2,442 ft |
| October | 50.9 | 973 ft | 61.9 | 1,695 ft |
| November | 40.3 | 259 ft | 49.5 | 880 ft |
| December | 30.9 | −389 ft | 38.6 | 143 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 4G1
DENSITY ALTITUDE
Field elevation 1,206 ft — the air behaves like 2,904 ft.
- PRESSURE ALT
- 1,207 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 Pennsylvania fields
- KGKJ — Port Meadville
Meadville · elev 1,399 ft
- 29D — Grove City
Grove City · elev 1,371 ft
- KFKL — Venango Regional
Franklin · elev 1,540 ft
- KUCP — New Castle Municipal
New Castle · elev 1,072 ft
- 6G1 — Titusville
Titusville · elev 1,600 ft
- KERI — Erie International/Tom Ridge Field
Erie · elev 732 ft
- KPJC — Zelienople Municipal
Zelienople · elev 907 ft
- 3G9 — Butler Farm Show
Butler · elev 1,333 ft
Frequently asked questions
How high does density altitude get at 4G1 in summer?
On a typical July afternoon — around 81 °F at the nearest NOAA normals station — density altitude at Greenville Municipal reaches roughly 2,910 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 4G1 on an average day?
It swings with the seasons: from roughly −804 ft at the coldest month's average temperature to about 2,208 ft at the warmest month's — all from a constant field elevation of 1,206 ft. The month-by-month table above carries the full year.
What is the field elevation of Greenville Municipal?
1,206 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 4G1 (FAA), in Greenville, Pennsylvania.