Climate guide for Ketchikan, Alaska

Best Time to Visit
Ketchikan

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About Ketchikan

Ketchikan stacks totem poles and fishing docks along the Inside Passage, with Misty Fjords floatplane trips nearby. Plan around June-September for the strongest nature conditions, then fine-tune with monthly climate scores.

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Travel Tips

Plan ahead for Ketchikan
Check local weather forecasts and seasonal daylight hours before traveling to Ketchikan.

Things to do in Ketchikan

Ketchikan, Alaska. Live activities and tours from GetYourGuide, matched to this destination.

When to visit Ketchikan: the short answer

The best time to visit Ketchikan is June, followed by July, August. Those months combine the most usable temperatures with the fewest lost days to rain: June averages 13°C with 139 mm of rain and about 18 sunny days. The months to avoid unless you have a specific reason are December, January. If budget matters more than perfect weather, October is the strongest of the low-rate months at 3.3/10.

Across the year Ketchikan swings from 0°C in January to 15°C in August, a 15-degree spread, while rainfall ranges from 137 mm in July to 345 mm in October. That is the whole planning problem in one sentence: Ketchikan is not equally good year-round, and the difference between the best and worst month here is 6 points on a 10-point scale.

Warmest month: August (15°C). Coolest: January (0°C). Driest: July (137 mm). Wettest: October (345 mm).

Ketchikan month by month

January in Ketchikan — the hardest end of the year

Hardest · 1.4/10

January averages 0°C (33°F), cold enough that sightseeing works in bursts rather than in one long day on foot.

307 mm of rain puts this in monsoon territory — about 0 sunny days across the whole month, and multi-day washouts are normal.

It scores 1.4/10 here, 11th of 12 months, against 7.4/10 in the destination's best month.

Expect mid-season pricing, and crowds are light for this destination.

Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, June is materially better in Ketchikan — 6 points higher on the same scale.

February in Ketchikan — the hardest end of the year

Hardest · 1.9/10

February averages 1°C (33°F), cold enough that sightseeing works in bursts rather than in one long day on foot.

251 mm of rain puts this in monsoon territory — about 0 sunny days across the whole month, and multi-day washouts are normal.

It scores 1.9/10 here, 10th of 12 months, against 7.4/10 in the destination's best month.

Expect low-season pricing, and crowds are light for this destination.

Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, June is materially better in Ketchikan — 5.5 points higher on the same scale.

March in Ketchikan — the hardest end of the year

Hardest · 3.1/10

March averages 2°C (35°F), cold enough that sightseeing works in bursts rather than in one long day on foot.

At 178 mm this is a genuinely wet month: about 2 sunny days in total, and outdoor plans need an indoor fallback.

It scores 3.1/10 here, 8th of 12 months, against 7.4/10 in the destination's best month.

Expect mid-season pricing, and crowds are light for this destination.

Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, June is materially better in Ketchikan — 4.3 points higher on the same scale.

April in Ketchikan — workable with trade-offs

Trade-offs · 5/10

April averages 5°C (40°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.

At 173 mm this is a genuinely wet month: about 10 sunny days in total, and outdoor plans need an indoor fallback.

It scores 5/10 here, 5th of 12 months, against 7.4/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, June is materially better in Ketchikan — 2.4 points higher on the same scale.

May in Ketchikan — workable with trade-offs

Trade-offs · 6.6/10

May averages 9°C (48°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.

At 158 mm this is a genuinely wet month: about 17 sunny days in total, and outdoor plans need an indoor fallback.

It scores 6.6/10 here, 4th of 12 months, against 7.4/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.

June in Ketchikan — the year's strongest window

Best window · 7.4/10

June averages 13°C (55°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.

At 139 mm this is a genuinely wet month: about 18 sunny days in total, and outdoor plans need an indoor fallback.

On our climate-comfort scale this is the top-ranked month of the year for Ketchikan at 7.4/10 — the reference point every other month on this page is measured against.

Expect mid-season pricing, and crowds are moderate.

Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella, footwear you can get muddy.

July in Ketchikan — reliably good (2nd best month)

Good · 7.2/10

July averages 15°C (59°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.

At 137 mm this is a genuinely wet month: about 16 sunny days in total, and outdoor plans need an indoor fallback.

It scores 7.2/10 here, 2nd of 12 months, against 7.4/10 in the destination's best month.

Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.

Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella, footwear you can get muddy.

August in Ketchikan — workable with trade-offs

Trade-offs · 6.7/10

August averages 15°C (60°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.

At 156 mm this is a genuinely wet month: about 14 sunny days in total, and outdoor plans need an indoor fallback.

It scores 6.7/10 here, 3rd of 12 months, against 7.4/10 in the destination's best month.

Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.

Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella, footwear you can get muddy.

September in Ketchikan — the hardest end of the year

Hardest · 4.5/10

September averages 12°C (53°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.

274 mm of rain puts this in monsoon territory — about 1 sunny days across the whole month, and multi-day washouts are normal.

It scores 4.5/10 here, 6th of 12 months, against 7.4/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, June is materially better in Ketchikan — 2.9 points higher on the same scale.

October in Ketchikan — the hardest end of the year

Hardest · 3.3/10

October averages 8°C (46°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.

345 mm of rain puts this in monsoon territory — about 0 sunny days across the whole month, and multi-day washouts are normal.

It scores 3.3/10 here, 7th of 12 months, against 7.4/10 in the destination's best month.

Expect low-season pricing, and crowds are light for this destination.

Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, June is materially better in Ketchikan — 4.1 points higher on the same scale.

November in Ketchikan — the hardest end of the year

Hardest · 2/10

November averages 2°C (36°F), cold enough that sightseeing works in bursts rather than in one long day on foot.

314 mm of rain puts this in monsoon territory — about 0 sunny days across the whole month, and multi-day washouts are normal.

It scores 2/10 here, 9th of 12 months, against 7.4/10 in the destination's best month.

Expect low-season pricing, and crowds are light for this destination.

Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, June is materially better in Ketchikan — 5.4 points higher on the same scale.

December in Ketchikan — the hardest end of the year

Hardest · 1.4/10

December averages 1°C (34°F), cold enough that sightseeing works in bursts rather than in one long day on foot.

333 mm of rain puts this in monsoon territory — about 0 sunny days across the whole month, and multi-day washouts are normal.

It scores 1.4/10 here, 12th of 12 months, against 7.4/10 in the destination's best month.

Expect mid-season pricing, and crowds are light for this destination.

Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, June is materially better in Ketchikan — 6 points higher on the same scale.

Frequently asked

When is the best time to visit Ketchikan, Alaska?
In Ideal Weather mode, the best months to visit Ketchikan are June, July. June is the single peak month with an Ideal Weather score of 7.4/10 based on temperature, rainfall, humidity, daylight and historical sunny days.
What is the weather like in Ketchikan year-round?
Ketchikan has a climate profile suited to nature and wildlife travel. Average monthly temperatures range from 0°C in January to 15°C in August, with Ideal Weather scores between 1.4 and 7.4 out of 10.
Which months should I avoid in Ketchikan?
The lowest Ideal Weather-scoring months in Ketchikan are January (1.4/10), December (1.4/10), February (1.9/10). These months typically combine less comfortable temperatures, higher rainfall or fewer sunny days.
When is the rainy season in Ketchikan?
October is the wettest month in Ketchikan, averaging about 345 mm of rainfall. July is the driest, at roughly 137 mm.
Which is the sunniest month in Ketchikan?
June sees the most sun in Ketchikan, with about 18 sunny days on average - ideal for outdoor plans.
Is Ketchikan a good destination for nature and wildlife travel?
Ketchikan is well suited to nature and wildlife travel. Its highest Ideal Weather window (June, July) aligns with the conditions travelers usually look for in this style of trip.
How is the bestime.to score for Ketchikan calculated?
Each month receives an Ideal Weather score from 0-10 using ERA5 climate normals for Ketchikan: temperature comfort, precipitation, humidity, daylight hours, and historical sunny days - weighted for nature and wildlife travel.

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