Green Bay, Wisconsin · field elev 695 ft
Density Altitude at Green Bay/Austin Straubel International (KGRB)
Green Bay/Austin Straubel International sits at 695 ft, and even a typical July afternoon (81 °F) only lifts density altitude to about 2,249 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 | 17.5 | −1,984 ft | 24.8 | −1,459 ft |
| February | 20.8 | −1,745 ft | 28.7 | −1,182 ft |
| March | 31.5 | −986 ft | 40.3 | −376 ft |
| April | 43.7 | −144 ft | 53.2 | 494 ft |
| May | 55.9 | 672 ft | 66.3 | 1,350 ft |
| June | 65.5 | 1,298 ft | 76.0 | 1,967 ft |
| July | 70.2 | 1,600 ft | 80.5 | 2,249 ft |
| August | 68.4 | 1,485 ft | 78.4 | 2,118 ft |
| September | 60.7 | 987 ft | 71.2 | 1,663 ft |
| October | 48.3 | 166 ft | 57.4 | 771 ft |
| November | 35.2 | −728 ft | 42.6 | −219 ft |
| December | 23.7 | −1,537 ft | 30.3 | −1,070 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 KGRB
DENSITY ALTITUDE
Field elevation 695 ft — the air behaves like 2,280 ft.
- PRESSURE ALT
- 696 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 Wisconsin fields
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- W34 — Shiocton
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- KOCQ — Oconto/J Douglas Bake Municipal
Oconto · elev 604 ft
- 11Y — Flying Feathers
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- KEZS — Shawano Municipal
Shawano · elev 813 ft
- KCLI — Clintonville Municipal
Clintonville · elev 826 ft
- 79C — Brennand
Neenah · elev 844 ft
Frequently asked questions
How high does density altitude get at KGRB in summer?
On a typical July afternoon — around 81 °F at the nearest NOAA normals station — density altitude at Green Bay/Austin Straubel International reaches roughly 2,249 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 KGRB on an average day?
It swings with the seasons: from roughly −1,984 ft at the coldest month's average temperature to about 1,600 ft at the warmest month's — all from a constant field elevation of 695 ft. The month-by-month table above carries the full year.
What is the field elevation of Green Bay/Austin Straubel International?
695 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KGRB (ICAO) / GRB (FAA), in Green Bay, Wisconsin.