Pere Marquette State Park
About
Pere Marquette State Park is a 116-acre state park in Illinois, about 3 miles from the town of Grafton. The State Department of Natural Resources manages the land, and the park serves as a base for climbing and hiking in the immediate area. Spring and fall are the most comfortable times to visit. At a nearby weather station, typical averages run to highs around 68°F in April and 69°F in October, while July averages 89°F. Several climbing areas sit about 0.3 miles away, including A: Jenga Diseaster Boulders and C: Hornbein's Wall. For hiking, the Gilbert Lake Hiking Trail is less than a mile off, and the Swan Lake Levee Trail is about 2 miles away.
Park size
116 acres
Location
Pere Marquette State Park
Illinois
Data source: USGS PAD-US 4.1 (Protected Areas Database, public domain)
Facts about this place
When to go
Best time to go: Apr–May. The mildest months here, with typical highs of 68–77°F and lows of 45–56°F.
Typical monthly averages (not a forecast) from the St Charles Co Ap, MO weather station, 4.1 mi away. High / low in °F.
- Jan40° high22° low
- Feb45° high26° low
- Mar56° high34° low
- Apr68° high45° low
- May77° high56° low
- Jun86° high65° low
- Jul89° high68° low
- Aug88° high66° low
- Sep81° high57° low
- Oct69° high46° low
- Nov55° high35° low
- Dec44° high27° low
Where it is
- Pere Marquette State Park · State park
- Nearest town
- Grafton, Illinois · 3.1 mi
- Managed by
- State Department of Natural Resources
Nearby
- A: Jenga Diseaster BouldersRock climbing0.3 mi
- A: Lily WallRock climbing0.3 mi
- C: Hornbein's WallRock climbing0.3 mi
- D: Community Effort WallRock climbing0.3 mi
Gilbert Lake Hiking TrailHikingPhoto: pasa47, CC BY 2.0 (via Flickr)0.9 mi- Duncan Farm TrailHiking1.5 mi
Swan Lake Levee TrailHikingPhoto: U.S. Department of the Interior, CC BY-SA 2.0 (via Wikimedia Commons)2.2 mi- Otter CreekCanoeing7.6 mi
Source: Roamze catalog (indexable pages within 10 miles, PostGIS distance)
Best time to visit Pere Marquette State Park
Best months: March–May and September–November. Best months have typical highs of 55–85 °F, lows of 30 °F or warmer (32 °F where the station doesn't record snow), at most one snowy day and no more than 12 wet days.
Jan
40° / 22°
7 wet
Feb
45° / 26°
7 wet
Mar
56° / 34°
10 wet
Apr
68° / 45°
11 wet
May
77° / 56°
12 wet
Jun
86° / 65°
11 wet
Jul
89° / 68°
9 wet
Aug
88° / 66°
9 wet
Sep
81° / 57°
10 wet
Oct
69° / 46°
9 wet
Nov
55° / 35°
8 wet
Dec
44° / 27°
8 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at St Charles Co Ap, MO, 4.1 mi away at 436 ft. We don't have this place's elevation, so higher spots nearby can run cooler. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
