Best Time to Drive: Grants Pass, OR to Terrebonne, OR

The best overall window to drive from Grants Pass, OR to Terrebonne, OR is May to September. May is especially comfortable, and 9 AM to 12 PM is usually the easiest departure window. The main things to watch are heavy rain and ponding.

Best overall window

May to September

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

Easiest departure pattern

9 AM to 12 PM

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

Most challenging stretch

November to December

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 May to September, 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

Challenging 27°F

Feb

Challenging 29°F

Mar

Fair 31°F

Apr

Good 34°F

May

Great 39°F

Jun

Great 42°F

Jul

Great 48°F

Aug

Great 47°F

Sep

Great 43°F

Oct

Good 37°F

Nov

Challenging 30°F

Dec

Difficult 26°F

Best Good/Fair Challenging

Average Conditions by Month

January

Avg high / low 33 / 22°F

Moisture 4 in rain

Rating Challenging

Best departure

9 AM to 12 PM

Wet stretches 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 36 / 22°F

Moisture 3.1 in rain

Rating Challenging

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.

March

Avg high / low 39 / 23°F

Moisture 2.9 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 43 / 25°F

Moisture 2.3 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.

May

Avg high / low 48 / 29°F

Moisture 1.8 in rain

Rating Great

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.

June

Avg high / low 53 / 32°F

Moisture 1 in rain

Rating Great

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.

July

Avg high / low 60 / 36°F

Moisture 0.5 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.

Rain disruption is usually limited compared with wetter months.

August

Avg high / low 60 / 35°F

Moisture 0.4 in rain

Rating Great

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.

September

Avg high / low 56 / 31°F

Moisture 0.7 in rain

Rating Great

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.

October

Avg high / low 47 / 26°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.

November

Avg high / low 36 / 24°F

Moisture 3.9 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 31 / 22°F

Moisture 5 in rain

Rating Difficult

Best departure

7 AM to 10 AM

Storm-prone Winter mix risk Holiday traffic

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

Rain is common enough that extra buffer time makes sense.

Seasonal Hazards on This Route

Heavy rain and ponding

Dec

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

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

9 AM to 12 PM

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

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

Pacific Coast

Destination zone

Pacific Coast

Route sample points

Late route

Late route checkpoint

OR GRANTS PASS (1.2 mi away)

Late route

Late route checkpoint

OR PROSPECT 2 SW (12.5 mi away)

Destination

Terrebonne, OR

OR REDMOND 5.4 NNW (1.6 mi away)

Ready to plan? See the full trip plan from Grants Pass, OR to Terrebonne, OR with stops, fuel costs, and directions.

Considering flying instead? Compare driving vs flying for this route.