O'Fallon, MO cannabis price index
Flower in O'Fallon typically costs $8.57 per gram (average $8.06) — measured across 133 priced listings at 1 licensed dispensaries.
Comparable range $5–$11.43 per gram · index refreshed Sep 23, 2026
↑ See the statewide Missouri flower price index
O'Fallon flower prices by package size
Averages of the real packages on O'Fallon menus — not a per-gram figure multiplied up.
| Size | Average | Lowest | Average per gram | Listings |
|---|---|---|---|---|
| Eighth (3.5g) | $33.70 | $20 | $9.63 | 76 |
| Quarter (7g) | $50.10 | $45 | $7.16 | 21 |
| Half (14g) | $72.50 | $70 | $5.18 | 20 |
| Ounce (28g) | $151.19 | $120 | $5.40 | 16 |
How this index is built
Each priced flower listing in O'Fallon whose package size is published on the menu is converted to a price per gram. Listings with no published size are excluded rather than estimated, which is why the listing count here is smaller than the total menu count.
Go deeper: cheapest weed in O'Fallon, cheap ounces, cheapest flower per gram, O'Fallon deals.
Figures come from licensed Missouri dispensary menus and change constantly. Adults 21+ only.