Starved Rock State Park Climate and Average Weather
Climate of Starved Rock State Park: average temperatures, rainfall and seasons month by month.
Climate in Starved Rock State Park month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 30° | 16° | 2,3 in | ★★☆☆☆ |
| February | 43° | 24° | 0,6 in | ★★★☆☆ |
| March | 56° | 35° | 4,4 in | ★★★☆☆ |
| April | 64° | 45° | 4,7 in | ★★★☆☆ |
| May | 73° | 52° | 3,6 in | ★★★★☆ |
| June | 82° | 64° | 5,4 in | ★★★★☆ |
| July | 84° | 67° | 5,4 in | ★★★★☆ |
| August | 82° | 64° | 2,7 in | ★★★★☆ |
| September | 79° | 59° | 2,6 in | ★★★★☆ |
| October | 67° | 49° | 2,6 in | ★★★★☆ |
| November | 51° | 36° | 2,7 in | ★★★☆☆ |
| December | 39° | 26° | 2,3 in | ★★☆☆☆ |
Climate type: Continental. Source: Open-Meteo archive (ERA5).
Recent extremes in Starved Rock State Park
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Starved Rock State Park compares with nearby places
Annual averages, and the difference against Starved Rock State Park.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| O'Hare International Airport | 72 mi | 52°F | 33°F cooler | 40 in |
| Wicker Park | 79 mi | 52°F | 33°F cooler | 38 in |
| Area Code 312 | 80 mi | 52°F | 33°F cooler | 40 in |
| Cook County | 80 mi | 52°F | 33°F cooler | 40 in |
| Chicago | 80 mi | 52°F | 33°F cooler | 40 in |
Best time to visit Starved Rock State Park
Go in May, August, September and October. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
What this means for Starved Rock State Park
Today is slightly cooler than average for August. The forecast high of 76°F is 6.3°F below the 82°F typical for this month.
Rain is very unlikely today - plans do not need a backup.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 84°F.
What to pack, what to skip
- Sunglasses, a brimmed hat and SPF 30+
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
Summary
Starved Rock State Park is a state park in Illinois. Starved Rock State Park is known for 18 canyons above the Illinois River.
Right now it is 71°F (21°C) in Starved Rock State Park with clear sky. It feels like 71°F. Today runs from 55°F to 76°F. Chance of precipitation is 0%. Sightseeing conditions score 9.8/10 - excellent - go now.
The best time to visit Starved Rock State Park is May, August, September and October. The climate is continental. January, February and December tend to be the least comfortable months. July is the warmest month with average highs near 84°F, while January is the coldest with lows near 16°F.
The closest major airport is O'Hare International Airport (ORD), about 72 mi away. Nearby highlights include Indiana Dunes National Park, Gateway Arch National Park and Lake Michigan.
In plain terms. Today is slightly cooler than average for August. The forecast high of 76°F is 6.3°F below the 82°F typical for this month. The best window to be outside is roughly 9 AM to 12 PM, when temperature, rain chance and wind line up best. sightseeing is the strongest bet in Starved Rock State Park today at 9.8/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Starved Rock State Park
| Type | State park |
|---|---|
| State | Illinois |
| Country | United States |
| Continent | North America |
| Coordinates | 41°19′9.1″N 88°59′35.2″W (41.3192, -88.9931) |
| Established | 1911 |
| Known for | 18 canyons above the Illinois River |
| Local time | 7:33 PM (UTC-05:00) |
| Best months | May, August, September and October |
| Climate | Continental |
Weather map for Starved Rock State Park
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Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore Starved Rock State Park
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Frequently asked questions
Where is Starved Rock State Park?
Starved Rock State Park is a state park in Illinois. Its coordinates are 41.3192, -88.9931. It lies in North America.
What is the weather like in Starved Rock State Park right now?
It is currently 71°F (21°C) with clear sky. Humidity is 62% and wind is 3 mph.
When is the best time to visit Starved Rock State Park?
May, August, September and October offer the most comfortable conditions in Starved Rock State Park, which has a continental climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is Starved Rock State Park in?
Starved Rock State Park observes America/Chicago (UTC-05:00). The local time is 7:33 PM.
What is the nearest airport to Starved Rock State Park?
The closest airports are O'Hare International Airport (ORD), 72 mi away.
What are the top things to do in Starved Rock State Park?
Popular options include Indiana Dunes National Park, Gateway Arch National Park and Lake Michigan.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (state-parks) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 23, 2026 at 7:33 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
