Updated October 2026
Pere Marquette State Park: Weather by Month and When to Go
Pere Marquette State Park is a state park in Illinois. The USGS Protected Areas Database maps about 120 acres under its name. Average highs range from 40°F in January to 89°F in July.
Average highs sit between 60°F and 80°F in April through May and October. They run above 80°F in June through September and below 60°F in November through March. The figures are NOAA climate normals for 1991–2020, measured at a weather station 3.6 miles from the park.
Warmest average high
89°F
July
Coldest average low
22°F
January
Most precipitation
4.6 in
May and June
Longest days
14.7 h
June
Pere Marquette State Park weather by month
| Month | Average high | Average low | Precipitation | Daylight |
|---|---|---|---|---|
| January | 40°F | 22°F | 2.5 in | 9.6 h |
| February | 45°F | 26°F | 1.9 in | 10.5 h |
| March | 56°F | 34°F | 3.1 in | 11.7 h |
| April | 68°F | 45°F | 4.2 in | 13.0 h |
| May | 77°F | 56°F | 4.6 in | 14.1 h |
| June | 86°F | 65°F | 4.6 in | 14.7 h |
| July | 89°F | 68°F | 3.7 in | 14.5 h |
| August | 88°F | 66°F | 3.7 in | 13.5 h |
| September | 81°F | 57°F | 3.0 in | 12.2 h |
| October | 69°F | 46°F | 2.7 in | 10.9 h |
| November | 55°F | 35°F | 3.2 in | 9.8 h |
| December | 44°F | 27°F | 2.4 in | 9.3 h |
Temperature and precipitation figures are NOAA climate normals for 1991–2020 from station USW00053904, the nearest station with a complete set of temperature normals, 3.6 miles from the park. Conditions in the park can differ from the station's, most of all where the two sit at different elevations. Daylight is calculated for the park's latitude at the middle of each month. The acreage is what the USGS Protected Areas Database maps under the park's name. The state's own figure can differ, because the database may hold part of a park under another name.
What the averages show
- Temperature. July is the warmest month, with an average high of 89°F and an average low of 68°F. January is the coldest month, with an average low of 22°F and an average high of 40°F.
- Precipitation. May and June are the wettest months, each averaging 4.6 inches of precipitation, and February is the driest, at 1.9 inches. An average year brings about 39.6 inches in total.
- Snowfall. The station has no snowfall normal, so snowfall is left out of the table. That is a gap in the station's record, not a sign that it never snows here.
- Daylight. Days run from about 9.3 hours of daylight in December to 14.7 hours in June.
Camping, trails, maps and fees
Whether Pere Marquette State Park has camping or cabins, where its trails run, when it opens and what it charges are all published by the agency that runs the park. Its official page is the place to check before a trip.
Official Pere Marquette State Park page
For the forecast rather than the averages, the National Weather Service issues a point forecast for the park's location.
National Weather Service forecast for Pere Marquette State Park
Where to stay near Pere Marquette State Park
Hotels, cabins and vacation rentals near Pere Marquette State Park, with live availability and prices.
Top-rated places to stay near Pere Marquette State Park
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Frequently Asked Questions
July is the warmest month, with an average high of 89°F and an average low of 68°F. January is the coldest month, with an average low of 22°F and an average high of 40°F. These are NOAA 1991–2020 climate normals from a weather station 3.6 miles from the park.
Average highs sit between 60°F and 80°F in April through May and October. They run above 80°F in June through September and below 60°F in November through March.
May and June are the wettest months, each averaging 4.6 inches of precipitation, and February is the driest, at 1.9 inches. An average year brings about 39.6 inches in total. The station has no snowfall normal, so no snowfall figure is available.
Days run from about 9.3 hours of daylight in December to 14.7 hours in June. The hours are calculated for the park's latitude.
Nearest National Park Service sites
- Gateway Arch National Park28 miles away
- Ulysses S Grant National Historic Site30 miles away
- Lincoln Home National Historic Site72 miles away
Nearby state parks
- Castlewood State Park30 miles away · Missouri
- Elephant Rocks State Park92 miles away · Missouri
Distances are measured in a straight line from the park, so the drive is longer.
Sources: NOAA NCEI U.S. Climate Normals 1991–2020; USGS Protected Areas Database for location and acreage; the official Illinois state park listing for the park's name.