Illinois State Parks · Illinois

Weldon Springs State Park

Illinois State Parks · Illinois, United States

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Group sites
Yes
Drinking water
Yes
Showers
Yes
Pets
Yes
Elevation
741 ft
Dark sky
Bortle class 4
Cell coverage
Verizon weak · AT&T good · T-Mobile none (carriers' 4G LTE filings to the FCC, 2025-12; not measured here)
Nearest town
Clinton
Address
4734 Weldon Springs Road, Clinton, IL 61727
Phone
(217) 935-2644
Activities
Camping, Group Camping

About

Weldon Springs State Park is an Illinois DNR state park in the East Central region of Illinois. Camping site types: Class A (showers, electricity, vehicular access); Class B/S (showers, vehicular access, no electric); Class C (vehicular access without showers, or walk-in with shower access). Also offers: Youth group camping. Pets ARE allowed (leashed, with water, never left unattended or in a parked vehicle) - IDNR's general statewide practice, confirmed via Starved Rock State Park's own IDNR FAQ. Reservable online through Illinois DNR's own Explore More Illinois system (camp.exploremoreil.com, redirects to the live recreation.exploremoreil.com/IllinoisWeb/ booking platform). Advance booking requires at least 3 days' notice; most sites are reservable May 1-October 31 (some year-round - confirm per park).

Fees

Class A: $20/night ($30 holiday weekends) - showers, electricity, vehicular access. Class B/S: $10/night - showers and vehicular access, no electric. Class C: $8/night - vehicular access without showers, or walk-in sites with shower access. Youth group (Class Y): $2/person/night, $20/day minimum. Reservation fee $5/reservation (non-refundable) plus first night's camping fee; camping fees refunded if cancelled online 3+ days before arrival. Discounts (about half the listed camping fee, full utility fee still applies) for Illinois residents 62+ or disabled with a Class 2/2A card; Illinois disabled veterans and POWs camp free aside from the utility fee; no entrance fee to any Illinois state park (dnr.illinois.gov).

Weather, month by month

MonthTypical highTypical lowColdest nightHottest dayYears with a night below 32°F
January32°19°-10°62°11 of 11
February38°23°-11°65°11 of 11
March53°34°11°77°9 of 11
April64°43°25°81°5 of 11
May75°57°41°88°0 of 11
June82°64°47°93°0 of 11
July84°68°59°92°0 of 11
August82°67°56°92°0 of 11
September80°63°51°93°0 of 11
October63°46°30°83°2 of 10
November52°34°11°72°6 of 10
December41°26°-11°65°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

All public campgrounds in Illinois · Every state and province · Facts read from the operator 2026-08-25. Confirm fees, rules and current status with the operator before you go.