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Climate · Ketchikan

Ketchikan in September

Mild and wet, as the days shorten.

Typical weather, averaged over 30 years

September in Ketchikan is mild: highs near 62°F, lows near 51°F. Rain falls on about five days a week, more often as the month goes on, and the days shorten by 1 hour 38 minutes from the first week to the last.September in Ketchikan is mild: highs near 17°C, lows near 11°C. Rain falls on about five days a week, more often as the month goes on, and the days shorten by 1 hour 38 minutes from the first week to the last.

High
62°F17°Caverage
Low
51°F11°Caverage
Wet days
5a week · 67% of days
Daylight
12h 35mon average

Is September a good time to visit Ketchikan?

A good month, just outside Ketchikan's best months, which run from July to August.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How September sits in the year

week by week

Temperature

Highs near 62°F in September, against 42°F to 67°F through the year.Highs near 17°C in September, against 6°C to 19°C through the year.

Chance of a wet day

67% of days in September, against 53% to 76% through the year.

Cloud cover

70% cover in September, against 65% to 76% through the year.

Daylight

12h 35m in September, against 7h 11m to 17h 21m through the year.

Week by week, lightly smoothed, with September shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. August67°19°low 55°low 13°4 wet days a weekRain on about four days a week.
  2. September62°17°low 51°low 11°5 wet days a weekRain on about five days a week.
  3. October55°13°low 46°low 8°5 wet days a weekRain on about five days a week.

Where Ketchikan sits, in September

America/Sitka
this place
typical high in September 40°F4°C95°F35°C
Sunrise, mid-September
6:17 AMsets 7:07 PM
Above the sea
0 mlow-lying
Latitude
55.3°Nnorthern hemisphere
Nearest of ours
Sitka297 km north-west

The land around Ketchikan, shaded by its typical high in September, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in United States in September

high · low · wet days
See September on the planning mapThe whole year in Ketchikan

Typical weather, averaged over 30 years (1995–2024), read 6 km south-west of Ketchikan. Its own grid square is mostly sea and holds only a daily average, so the page reads the nearest square with a true high and low near the town's height. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (0 m) against the climate model's (162 m).Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (0 m) against the climate model's (162 m). Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.