Summer Road Trips in Illinois

Routes

Avg Distance

377 mi

Avg Drive

7h 23m

Destinations

Methodology

Routes filtered by drive score and typical seasonal conditions. Historical hazard counts pulled from FEMA disaster declarations and USGS seismic feeds; monthly weather context from NOAA 1991–2020 normals.

Data sources: OSRM • NOAA NCEI climate normals • FEMA OpenFEMA • USGS Earthquake Hazards • EIA weekly fuel survey

Last reviewed

Jun 3, 2026

0 seconds ago

Curated by the US Trip Planner editorial team.
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Illinois in summer offers a network of 30 routes averaging 377 miles and nearly 7.5 hours. These drives feature mostly flat terrain with max elevations around 780 ft. With excellent EV coverage on many options, you can explore the state's parks without range anxiety. Expect high drive scores, with most routes rated 8 out of 10.

Fuel snapshot for this state

Regular

$4.22/gal

Diesel: $5.35/gal

Typical trip cost

$60–$72

One-way, ~377 mi avg @ 25.4 MPG

CO₂ per trip

~132 kg

ICE vehicle, one-way average

Source: US Energy Information Administration • week of 2026-06-01

Climate through the year: Illinois

Illinois peaks at around 85°F in Jul and cools to 32°F / 19°F in Jan. Wettest month is May at ~4.5 in of rain. Table highlights Summer months.

Month	High °F	Low °F	Rain in	Snow in
Jan	32	19	2	11.3
Feb	36	22	2	10.7
Mar	47	31	2.5	5.5
Apr	59	40	3.8	1.3
May	71	51	4.5	—
Jun peak	80	61	4.1	—
Jul peak	85	66	3.7	—
Aug peak	83	65	4.3	—
Sep	76	57	3.2	—
Oct	63	45	3.4	0.2
Nov	48	34	2.4	1.8
Dec	37	24	2.1	7.6

Source: NOAA NCEI Monthly Climate Normals, 1991–2020 reference period. Sampled at the major-airport station for IL — microclimates along specific routes can vary significantly.

Planning Tips

Carry extra water — summer heat in the car and at rest stops dehydrates faster than you think.
Start drives early or late to avoid peak afternoon heat, especially through desert or plains stretches.
Check your tire pressure before long summer drives — hot pavement increases blowout risk with underinflated tires.

Frequently Asked Questions

We've identified 30 routes in Illinois that work well for summer travel, based on drive quality, typical weather conditions, and distance (averaging 377 miles).

Current regular gas averages $4.22/gallon in Illinois (week of 2026-06-01). Diesel: $5.35/gallon. A typical one-way trip on these routes costs between $60 and $72. Source: US Energy Information Administration.

Across Jun, Jul, Aug, Illinois typically sees daytime highs in the 80–85°F range with about 4 in of rain per month on average. Based on NOAA 1991–2020 monthly climate normals.

Drive times and distances come from OSRM routing over real OpenStreetMap road networks. Fuel costs use weekly US Energy Information Administration state-level gas prices. Drive scores factor in elevation profile, road variety, and terrain. EV charging data is sourced from NREL. Climate normals come from NOAA NCEI (1991–2020 reference period). Hazard data comes from FEMA and USGS public feeds.

Yes. Click any route to see its full trip page with turn-by-turn directions, fuel cost estimates, elevation profile, stop suggestions, weather conditions, and more.

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