Wisconsin State Parks · Wisconsin
Nelson Dewey State Park
Wisconsin State Parks · Wisconsin, United States
- Sites
- 48
- Hookups
- 21 electric, 27 no hookups
- Group sites
- Yes
- Drinking water
- Yes
- Restrooms
- Yes
- Showers
- Yes
- Pets
- Yes
- Elevation
- 633 ft
- Dark sky
- Bortle class 2
- Cell coverage
- T-Mobile weak · Verizon weak · AT&T none (carriers' 4G LTE filings to the FCC, 2025-12; not measured here)
- Nearest town
- Cassville
- Address
- 12190 Co Hwy VV
- Activities
- Camping, Group Camping
About
Nelson Dewey State Park overlooks the Mississippi River near where it meets the Wisconsin River, on the grounds of Wisconsin's first governor's 19th-century estate. The 45-site family campground has 18 electric sites plus four walk-to sites with river views; three electric group sites hold up to 120 campers combined.
Fees
Wisconsin DNR statewide camping system: a vehicle admission sticker is required at every state park or forest entrance, including for registered campers - $28/year for Wisconsin residents ($13/year age 65+) or $50/year for non-residents, or $13/day resident / $16/day non-resident. Nightly campsite rates vary by electricity, amenities, location, site type, day of week and season, and are shown when you select a specific site during booking; non-resident campers pay a flat $15/night surcharge on top of the site's own rate. A $9.30 reservation fee applies per booking, plus a $10 cancellation fee or $6 change fee if plans change. Pets are allowed at this campground on a leash no longer than 8 feet at all times, per Wisconsin State Park System's statewide pet policy; owners must clean up and properly dispose of pet waste.
Weather, month by month
| Month | Typical high | Typical low | Coldest night | Hottest day | Years with a night below 32°F |
|---|---|---|---|---|---|
| January | 27° | 10° | -15° | 49° | 11 of 11 |
| February | 32° | 16° | -16° | 63° | 11 of 11 |
| March | 46° | 30° | 4° | 75° | 11 of 11 |
| April | 59° | 40° | 24° | 79° | 5 of 11 |
| May | 70° | 53° | 36° | 87° | 0 of 11 |
| June | 81° | 64° | 51° | 93° | 0 of 11 |
| July | 83° | 68° | 61° | 92° | 0 of 11 |
| August | 80° | 66° | 58° | 89° | 0 of 11 |
| September | 78° | 61° | 47° | 89° | 0 of 11 |
| October | 61° | 46° | 30° | 78° | 2 of 10 |
| November | 45° | 32° | 7° | 70° | 6 of 10 |
| December | 36° | 24° | -10° | 69° | 10 of 10 |
Mid-month figures from 2016–2026 of daily weather at this spot (ERA5 reanalysis via Open-Meteo, CC BY 4.0), in °F. Typical is the median; coldest and hottest are the extremes seen.
Nearby campgrounds
- Frenchtown Park · City, County & Regional Parks · 9 mi · 3 sites
- Buck Creek · City, County & Regional Parks · 15 mi · 2 sites
- Grant River · Army Corps of Engineers · 16 mi · 74 sites
- Motor Mill Historic Site · City, County & Regional Parks · 18 mi · 5 sites
- Wyalusing State Park · Wisconsin State Parks · 18 mi · 114 sites
All public campgrounds in Wisconsin · Every state and province · Facts read from the operator 2026-08-25. Confirm fees, rules and current status with the operator before you go.