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

The best overall window to drive from Ketchikan, AK to Juneau, AK is January. May 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

January

This is the clearest single-month sweet spot on the calendar.

Easiest departure pattern

7 AM to 10 AM

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

Most challenging stretch

January to March

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 January, 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 31°F

Feb

Difficult 33°F

Mar

Difficult 36°F

Apr

Challenging 43°F

May

Good 51°F

Jun

Good 56°F

Jul

Fair 58°F

Aug

Fair 58°F

Sep

Fair 52°F

Oct

Challenging 45°F

Nov

Difficult 37°F

Dec

Difficult 33°F

Best Good/Fair Challenging

Average Conditions by Month

January

Avg high / low 35 / 28°F

Moisture 9.6 in rain

Rating Difficult

Best departure

7 AM to 10 AM

Storm-prone Winter mix risk

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 38 / 29°F

Moisture 6.6 in rain

Rating Difficult

Best departure

7 AM to 10 AM

Storm-prone Winter mix risk

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 41 / 31°F

Moisture 7.3 in rain

Rating Difficult

Best departure

7 AM to 10 AM

Storm-prone Winter mix risk

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 50 / 36°F

Moisture 5.8 in rain

Rating Challenging

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 58 / 43°F

Moisture 5.3 in rain

Rating Good

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.

June

Avg high / low 63 / 49°F

Moisture 5 in rain

Rating Good

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.

July

Avg high / low 64 / 53°F

Moisture 6.2 in rain

Rating Fair

Best departure

7 AM to 10 AM

Storm-prone Patchy fog Holiday traffic

Daytime temperatures usually stay in a comfortable driving range.

Rain is common enough that extra buffer time makes sense.

August

Avg high / low 64 / 52°F

Moisture 8.7 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 57 / 48°F

Moisture 13.4 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 49 / 41°F

Moisture 13.1 in rain

Rating Challenging

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.

November

Avg high / low 40 / 33°F

Moisture 11.4 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.

December

Avg high / low 36 / 30°F

Moisture 11.6 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

Jan - 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

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 3 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 BEAVER FALLS (2.2 mi away)

Late route

Late route checkpoint

AK AUKE BAY (0.1 mi away)

Destination

Juneau, AK

AK JUNEAU DWTN (0.4 mi away)

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

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