Illinois State Parks · Illinois

Siloam Springs State Park

Illinois State Parks · Illinois, United States

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Drinking water
Yes
Showers
Yes
Pets
Yes
Elevation
699 ft
Dark sky
Bortle class 1
Cell coverage
Verizon weak · T-Mobile none · AT&T none (carriers' 4G LTE filings to the FCC, 2025-12; not measured here)
Nearest town
Clayton
Address
938 East 3003rd Lane, Clayton, IL 62324
Phone
(217) 561-3170
Activities
Camping, Equestrian Camping

About

Siloam Springs State Park is an Illinois DNR state park in the West Central region of Illinois. Camping site types: Class A (showers, electricity, vehicular access); Class B/S (showers, vehicular access, no electric); Class D (tent/primitive walk-in or backpack sites, no vehicular access); Equestrian camping. Rent-A-Camp equipment rental (a furnished large or extra-large tent, $8 or $12/stay plus the site's camping and utility fees) is offered at this park per IDNR's own Camp Classifications table. 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 D: $6/night - tent camping or primitive sites (walk-in or backpack), no vehicular access. Equestrian camping available (specific class/rate varies by site). 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
January33°19°-13°58°11 of 11
February41°24°-8°67°11 of 11
March53°36°11°78°9 of 11
April65°44°27°82°5 of 11
May75°59°42°88°0 of 11
June85°67°52°95°0 of 11
July87°70°61°95°0 of 11
August84°69°58°94°0 of 11
September81°63°52°94°0 of 11
October64°47°31°86°2 of 10
November53°36°11°74°6 of 10
December42°28°-1°71°9 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.