Best Time to Drive: Irving, TX to Mercedes, TX

The best overall window to drive from Irving, TX to Mercedes, TX is March to October. June is especially comfortable, and 8 AM to 11 AM is usually the easiest departure window.

Best overall window

March to October

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

Easiest departure pattern

8 AM to 11 AM

Mid-morning is usually the steadiest all-around departure window.

Most challenging stretch

December

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

Why This Route Scores Differently

This route is long enough that weather comfort across the whole day matters more than just departure conditions.

The current best window is March to October, 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

Good 40°F

Feb

Good 43°F

Mar

Great 48°F

Apr

Great 53°F

May

Great 59°F

Jun

Great 63°F

Jul

Great 65°F

Aug

Excellent 65°F

Sep

Great 61°F

Oct

Great 54°F

Nov

Good 47°F

Dec

Fair 41°F

Best Good/Fair Challenging

Average Conditions by Month

January

Avg high / low 49 / 32°F

Moisture 2.2 in rain

Rating Good

Best departure

9 AM to 12 PM

Steady driving window

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

Rain disruption is usually limited compared with wetter months.

February

Avg high / low 52 / 35°F

Moisture 2 in rain

Rating Good

Best departure

9 AM to 12 PM

Steady driving window

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 57 / 40°F

Moisture 2.6 in rain

Rating Great

Best departure

8 AM to 11 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.

April

Avg high / low 62 / 45°F

Moisture 2.4 in rain

Rating Great

Best departure

8 AM to 11 AM

Steady driving window

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

Rain disruption is usually limited compared with wetter months.

May

Avg high / low 66 / 51°F

Moisture 4.2 in rain

Rating Great

Best departure

8 AM to 11 AM

Wet stretches

Daytime temperatures usually stay in a comfortable driving range.

Weather is mixed enough that departure timing still matters.

June

Avg high / low 70 / 56°F

Moisture 3.4 in rain

Rating Great

Best departure

8 AM to 11 AM

Steady driving window

Daytime temperatures usually stay in a comfortable driving range.

Weather is mixed enough that departure timing still matters.

July

Avg high / low 72 / 57°F

Moisture 2.1 in rain

Rating Great

Best departure

8 AM to 11 AM

Holiday traffic

Daytime temperatures usually stay in a comfortable driving range.

Rain disruption is usually limited compared with wetter months.

August

Avg high / low 73 / 57°F

Moisture 2.4 in rain

Rating Excellent

Best departure

8 AM to 11 AM

Steady driving window

Daytime temperatures usually stay in a comfortable driving range.

Rain disruption is usually limited compared with wetter months.

September

Avg high / low 68 / 53°F

Moisture 4 in rain

Rating Great

Best departure

8 AM to 11 AM

Wet stretches

Daytime temperatures usually stay in a comfortable driving range.

Weather is mixed enough that departure timing still matters.

October

Avg high / low 63 / 46°F

Moisture 3.4 in rain

Rating Great

Best departure

8 AM to 11 AM

Steady driving window

Daytime temperatures usually stay in a comfortable driving range.

Weather is mixed enough that departure timing still matters.

November

Avg high / low 55 / 39°F

Moisture 2.4 in rain

Rating Good

Best departure

8 AM to 11 AM

Holiday traffic

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

Rain disruption is usually limited compared with wetter months.

December

Avg high / low 49 / 33°F

Moisture 2.4 in rain

Rating Fair

Best departure

9 AM to 12 PM

Holiday traffic

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

Rain disruption is usually limited compared with wetter months.

Best Departure Time by Season

Spring

8 AM to 11 AM

Mid-morning is usually the steadiest all-around departure window.

Summer

8 AM to 11 AM

Mid-morning is usually the steadiest all-around departure window.

Fall

8 AM to 11 AM

Mid-morning is usually the steadiest all-around departure window.

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 4 NOAA-backed route checkpoints rather than a single statewide estimate.

Origin zone

Great Plains

Destination zone

Great Plains

Route sample points

Late route

Late route checkpoint

TX DALLAS FAA AP 72258 (6.8 mi away)

Late route

Late route checkpoint

TX TROY (0.5 mi away)

Late route

Late route checkpoint

TX PLEASANTON (6.3 mi away)

Destination

Mercedes, TX

TX WESLACO (4.1 mi away)

Ready to plan? See the full trip plan from Irving, TX to Mercedes, TX with stops, fuel costs, and directions.

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