Hartford, WI: how dark is the sky here?
Satellite radiance puts Hartford in the suburban band. Light dome dominates much of the sky. Only the brightest stars and planets stand out clearly. That's brighter than 69.3% of the 3,206 US cities in this dataset.
This comes from a satellite measuring light radiating upward, not a person's eyes on the ground, so it isn't the same as a Bortle class, though the two track each other closely.
Where to go for a darker sky near Hartford
Richfield, WI, about 9 miles away as the crow flies, measures in the rural band, one step darker than Hartford. Actual driving distance will run longer than that straight-line figure.
Richfield, WI is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How Hartford compares nationally
Hartford, WI counts roughly 15,984 residents, among the 3,206 US cities this site tracks. Hartford places 2,208 of 3,206 cities in this dataset's darkest-to-brightest order.