Casa Grande Ruins National Monument
Sky Score 41/100≈ Bortle 5
Casa Grande Ruins National Monument is a protected area in Arizona with a measured darkness of 54/100 (≈ Bortle 5) — a usable sky for casual stargazing, though city glow is noticeable. The best month to come is typically May, when about 83% of the night sky is clear.
Tonight's outlook: 35/100. The moon is 7% lit and above the horizon 13% of the night; typical August clear-sky odds here are 57%. Updated daily.
Best time to stargaze at Casa Grande Ruins National Monument
| Month | Clear night skies | Sky Score (new moon) |
|---|---|---|
| January | 61% | 37/100 |
| February | 68% | 40/100 |
| March | 67% | 40/100 |
| April | 78% | 45/100 |
| May ★ | 83% | 47/100 |
| June | 80% | 45/100 |
| July | 49% | 32/100 |
| August | 57% | 35/100 |
| September | 75% | 43/100 |
| October | 83% | 47/100 |
| November | 72% | 42/100 |
| December | 64% | 38/100 |
Scores assume a moonless night — check the moon before you drive (methodology).
Where to stay near Casa Grande Ruins National Monument
No lodging within 80 km — this is true wilderness. Plan to camp, or base yourself in the nearest gateway town and drive out for the night.
Nearby spots in Arizona
- Hohokam Pima National Monument — 41.3 km · Sky Score 37/100
- Ironwood Forest National Monument — 61.5 km · Sky Score 56/100
- Sonoran Desert National Monument — 74 km · Sky Score 62/100
- Tonto National Monument — 82.2 km · Sky Score 62/100
- Saguaro National Park - Tucson Mountain District — 84.5 km · Sky Score 45/100