Best Time to Drive: Bloomington, IL to Carbondale, IL

The best overall window to drive from Bloomington, IL to Carbondale, IL is June to August. June is especially comfortable, and 7 AM to 10 AM is usually the easiest departure window. The main things to watch are heavy rain and ponding.

Best overall window

June to August

This stretch gives the steadiest mix of comfort, daylight, and lower weather friction.

Easiest departure pattern

7 AM to 10 AM

This is short enough that a mid-morning departure still keeps the whole drive comfortable.

Most challenging stretch

November

November is one of the harder months for this route because the weather friction stacks up faster.

Why This Route Scores Differently

This is a same-day corridor, so departure timing matters almost as much as the month you choose.

The current best window is June to August, when the drive is more likely to feel steady end to end.

This score uses multiple NOAA sample points along the route instead of a single state-wide climate average.

Month-by-Month Driving Conditions

Jan

Fair 20°F

Feb

Fair 23°F

Mar

Fair 29°F

Apr

Fair 37°F

May

Good 44°F

Jun

Good 49°F

Jul

Great 52°F

Aug

Great 50°F

Sep

Good 45°F

Oct

Fair 38°F

Nov

Challenging 30°F

Dec

Challenging 23°F

Best Good/Fair Challenging

Average Conditions by Month

January

Avg high / low 26 / 15°F

Moisture 2.8 in rain

Rating Fair

Best departure

9 AM to 12 PM

Winter mix risk

Temperatures are workable, but not as easy as the best shoulder-season windows.

Weather is mixed enough that departure timing still matters.

February

Avg high / low 29 / 17°F

Moisture 2.5 in rain

Rating Fair

Best departure

9 AM to 12 PM

Winter mix risk

Temperatures are workable, but not as easy as the best shoulder-season windows.

Rain disruption is usually limited compared with wetter months.

March

Avg high / low 36 / 23°F

Moisture 3.5 in rain

Rating Fair

Best departure

9 AM to 12 PM

Steady driving window

Temperatures are workable, but not as easy as the best shoulder-season windows.

Weather is mixed enough that departure timing still matters.

April

Avg high / low 44 / 29°F

Moisture 4.8 in rain

Rating Fair

Best departure

9 AM to 12 PM

Wet stretches

Temperatures are workable, but not as easy as the best shoulder-season windows.

Weather is mixed enough that departure timing still matters.

May

Avg high / low 51 / 36°F

Moisture 5 in rain

Rating Good

Best departure

7 AM to 10 AM

Wet stretches

Temperatures are workable, but not as easy as the best shoulder-season windows.

Weather is mixed enough that departure timing still matters.

June

Avg high / low 56 / 42°F

Moisture 4.6 in rain

Rating Good

Best departure

7 AM to 10 AM

Wet stretches Patchy fog

Temperatures are workable, but not as easy as the best shoulder-season windows.

Weather is mixed enough that departure timing still matters.

July

Avg high / low 58 / 45°F

Moisture 4 in rain

Rating Great

Best departure

7 AM to 10 AM

Holiday traffic

Temperatures are workable, but not as easy as the best shoulder-season windows.

Weather is mixed enough that departure timing still matters.

August

Avg high / low 58 / 43°F

Moisture 3.4 in rain

Rating Great

Best departure

7 AM to 10 AM

Steady driving window

Temperatures are workable, but not as easy as the best shoulder-season windows.

Weather is mixed enough that departure timing still matters.

September

Avg high / low 54 / 37°F

Moisture 3.2 in rain

Rating Good

Best departure

7 AM to 10 AM

Steady driving window

Temperatures are workable, but not as easy as the best shoulder-season windows.

Weather is mixed enough that departure timing still matters.

October

Avg high / low 46 / 29°F

Moisture 3.3 in rain

Rating Fair

Best departure

9 AM to 12 PM

Steady driving window

Temperatures are workable, but not as easy as the best shoulder-season windows.

Weather is mixed enough that departure timing still matters.

November

Avg high / low 37 / 23°F

Moisture 3.7 in rain

Rating Challenging

Best departure

9 AM to 12 PM

Holiday traffic

Temperatures are workable, but not as easy as the best shoulder-season windows.

Weather is mixed enough that departure timing still matters.

December

Avg high / low 29 / 18°F

Moisture 3 in rain

Rating Challenging

Best departure

9 AM to 12 PM

Winter mix risk Holiday traffic

Temperatures are workable, but not as easy as the best shoulder-season windows.

Weather is mixed enough that departure timing still matters.

Seasonal Hazards on This Route

Heavy rain and ponding

May

Short intense downpours can make a same-day drive feel longer than the raw route time suggests.

Morning visibility dips

Jun

Cooler humid mornings can start with patchy fog, so it can be worth waiting a bit before leaving.

Winter mix risk

Jan - Dec

Even light snow or freezing precipitation can matter more than usual when this route turns into a same-day commitment.

Best Departure Time by Season

Spring

9 AM to 12 PM

Waiting for a little daylight and warmer pavement usually makes the drive easier.

Summer

7 AM to 10 AM

This is short enough that a mid-morning departure still keeps the whole drive comfortable.

Fall

9 AM to 12 PM

Waiting for a little daylight and warmer pavement usually makes the drive easier.

Winter

9 AM to 12 PM

Waiting for a little daylight and warmer pavement usually makes the drive easier.

How This Score Was Built

Source

Route-sampled NOAA climate normals

High confidence. Built from 3 NOAA-backed route checkpoints rather than a single statewide estimate.

Origin zone

Midwest

Destination zone

Midwest

Route sample points

Late route

Late route checkpoint

IL BLOOMINGTON WTR WKS (0.9 mi away)

Late route

Late route checkpoint

IL VANDALIA (2.9 mi away)

Destination

Carbondale, IL

IL CARBONDALE SEWAGE PLT (2.8 mi away)

Ready to plan? See the full trip plan from Bloomington, IL to Carbondale, IL with stops, fuel costs, and directions.

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