Superior, Wisconsin · field elev 674 ft
Density Altitude at Richard I Bong (KSUW)
Richard I Bong sits at 674 ft, and even a typical July afternoon (76 °F) only lifts density altitude to about 1,948 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 | 14.1 | −2,258 ft | 22.5 | −1,649 ft |
| February | 18.0 | −1,974 ft | 26.9 | −1,336 ft |
| March | 28.5 | −1,223 ft | 36.1 | −692 ft |
| April | 38.9 | −498 ft | 46.0 | −14 ft |
| May | 49.1 | 194 ft | 57.4 | 745 ft |
| June | 58.2 | 798 ft | 67.0 | 1,369 ft |
| July | 67.1 | 1,375 ft | 76.1 | 1,948 ft |
| August | 66.4 | 1,330 ft | 74.8 | 1,866 ft |
| September | 58.4 | 811 ft | 66.6 | 1,343 ft |
| October | 45.8 | −28 ft | 53.0 | 454 ft |
| November | 32.4 | −949 ft | 39.1 | −485 ft |
| December | 20.2 | −1,815 ft | 27.3 | −1,308 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 KSUW
DENSITY ALTITUDE
Field elevation 674 ft — the air behaves like 1,941 ft.
- PRESSURE ALT
- 675 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
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- AIR DENSITY
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- 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
- KOLG — Solon Springs Municipal
Solon Springs · elev 1,102 ft
- Y77 — Bayfield County
Iron River · elev 1,134 ft
- 5G4 — Eau Claire Lakes
Drummond · elev 1,212 ft
- 23W — Cornucopia Field
Cornucopia · elev 757 ft
- 3CU — Cable Union
Cable · elev 1,360 ft
- KHYR — Sawyer County
Hayward · elev 1,216 ft
- KASX — John F Kennedy Meml
Ashland · elev 827 ft
- 1H9 — Nest Of Eagles
Spooner · elev 1,115 ft
Frequently asked questions
How high does density altitude get at KSUW in summer?
On a typical July afternoon — around 76 °F at the nearest NOAA normals station — density altitude at Richard I Bong reaches roughly 1,948 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 KSUW on an average day?
It swings with the seasons: from roughly −2,258 ft at the coldest month's average temperature to about 1,375 ft at the warmest month's — all from a constant field elevation of 674 ft. The month-by-month table above carries the full year.
What is the field elevation of Richard I Bong?
674 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KSUW (ICAO) / SUW (FAA), in Superior, Wisconsin.