Rio Grande City, Texas · field elev 290 ft
Density Altitude at Rio Grande City Municipal (67R)
Rio Grande City Municipal sits at 290 ft, and even a typical August afternoon (99 °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 | 57.9 | 304 ft | 70.7 | 1,134 ft |
| February | 63.1 | 644 ft | 76.3 | 1,490 ft |
| March | 69.1 | 1,032 ft | 82.0 | 1,847 ft |
| April | 75.7 | 1,452 ft | 88.6 | 2,255 ft |
| May | 81.9 | 1,841 ft | 93.8 | 2,572 ft |
| June | 86.2 | 2,107 ft | 98.1 | 2,832 ft |
| July | 87.1 | 2,163 ft | 99.0 | 2,886 ft |
| August | 87.3 | 2,175 ft | 99.4 | 2,910 ft |
| September | 82.5 | 1,878 ft | 93.9 | 2,578 ft |
| October | 75.9 | 1,465 ft | 88.4 | 2,243 ft |
| November | 66.5 | 865 ft | 78.7 | 1,641 ft |
| December | 59.2 | 389 ft | 71.9 | 1,211 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 67R
DENSITY ALTITUDE
Field elevation 290 ft — the air behaves like 2,886 ft.
- PRESSURE ALT
- 291 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
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- KTXW — Mid Valley
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- KHBV — Jim Hogg County
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- KBKS — Brooks County
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- KHRL — Valley International
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- KLRD — Laredo International
Laredo · elev 508 ft
Frequently asked questions
How high does density altitude get at 67R in summer?
On a typical August afternoon — around 99 °F at the nearest NOAA normals station — density altitude at Rio Grande City 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 67R on an average day?
It swings with the seasons: from roughly 304 ft at the coldest month's average temperature to about 2,175 ft at the warmest month's — all from a constant field elevation of 290 ft. The month-by-month table above carries the full year.
What is the field elevation of Rio Grande City Municipal?
290 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 67R (FAA), in Rio Grande City, Texas.