Best Time to Drive: Sterling, AK to Ketchikan, AK

The best overall window to drive from Sterling, AK to Ketchikan, AK is June. June is especially comfortable, and 8 AM to 11 AM is usually the easiest departure window. The main things to watch are heavy rain and ponding.

Best overall window

June

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

January to April

November 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 June, 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

Difficult 22°F

Feb

Difficult 26°F

Mar

Difficult 28°F

Apr

Difficult 38°F

May

Fair 47°F

Jun

Great 54°F

Jul

Good 57°F

Aug

Fair 56°F

Sep

Fair 49°F

Oct

Difficult 38°F

Nov

Difficult 28°F

Dec

Difficult 24°F

Best Good/Fair Challenging

Average Conditions by Month

January

Avg high / low 28 / 16°F

Moisture 9.1 in rain

Rating Difficult

Best departure

7 AM to 10 AM

Storm-prone

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

Rain is common enough that extra buffer time makes sense.

February

Avg high / low 32 / 19°F

Moisture 7.2 in rain

Rating Difficult

Best departure

7 AM to 10 AM

Storm-prone

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

Rain is common enough that extra buffer time makes sense.

March

Avg high / low 37 / 20°F

Moisture 6.3 in rain

Rating Difficult

Best departure

7 AM to 10 AM

Storm-prone

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

Rain is common enough that extra buffer time makes sense.

April

Avg high / low 46 / 31°F

Moisture 6.3 in rain

Rating Difficult

Best departure

7 AM to 10 AM

Storm-prone

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

Rain is common enough that extra buffer time makes sense.

May

Avg high / low 56 / 38°F

Moisture 5.5 in rain

Rating Fair

Best departure

7 AM to 10 AM

Storm-prone

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

Rain is common enough that extra buffer time makes sense.

June

Avg high / low 62 / 45°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.

July

Avg high / low 65 / 49°F

Moisture 4.7 in rain

Rating Good

Best departure

8 AM to 11 AM

Wet stretches Patchy fog Holiday traffic

Daytime temperatures usually stay in a comfortable driving range.

Weather is mixed enough that departure timing still matters.

August

Avg high / low 64 / 48°F

Moisture 7.2 in rain

Rating Fair

Best departure

7 AM to 10 AM

Storm-prone Patchy fog

Daytime temperatures usually stay in a comfortable driving range.

Rain is common enough that extra buffer time makes sense.

September

Avg high / low 56 / 42°F

Moisture 12.5 in rain

Rating Fair

Best departure

7 AM to 10 AM

Storm-prone Patchy fog

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

Rain is common enough that extra buffer time makes sense.

October

Avg high / low 44 / 32°F

Moisture 11.6 in rain

Rating Difficult

Best departure

7 AM to 10 AM

Storm-prone

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

Rain is common enough that extra buffer time makes sense.

November

Avg high / low 34 / 23°F

Moisture 10.4 in rain

Rating Difficult

Best departure

7 AM to 10 AM

Storm-prone 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.

December

Avg high / low 30 / 19°F

Moisture 10.5 in rain

Rating Difficult

Best departure

7 AM to 10 AM

Storm-prone 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

Jan - Dec

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

Best Departure Time by Season

Spring

7 AM to 10 AM

A morning departure gives you more room to adjust if rain slows the drive down.

Summer

7 AM to 10 AM

A morning departure gives you more room to adjust if rain slows the drive down.

Fall

7 AM to 10 AM

A morning departure gives you more room to adjust if rain slows the drive down.

Winter

7 AM to 10 AM

A morning departure gives you more room to adjust if rain slows the drive down.

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

Alaska

Destination zone

Alaska

Route sample points

Late route

Late route checkpoint

AK STERLING 6SW (6.1 mi away)

Late route

Late route checkpoint

AK MOOSE PASS 3NW (4.7 mi away)

Late route

Late route checkpoint

AK PORTAGE GLACIER VISITOR CTR (1.9 mi away)

Destination

Ketchikan, AK

AK BEAVER FALLS (2.2 mi away)

Ready to plan? See the full trip plan from Sterling, AK to Ketchikan, AK with stops, fuel costs, and directions.

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