Ketchikan weather in October: Ketchikan, Alaska: normal highs, lows, rain and records for October
Ketchikan in October has a normal high of 51°F and a normal low of 41°F, a daily mean of 46°F, falling from 55°F on the 1st to 47°F by the 31st. Measurable precipitation falls on 23 days in a normal October, 18.37 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 11°C and low of 5°C, 467 mm of precipitation in October.
- NOAA stationKetchikan International Airport
- Station IDUSW00025325
- Location55.36°N 131.71°W
- Elevation76 ft (23 m)
- Population8,033
- Jan 40° 32°
- Feb 41° 32°
- Mar 44° 32°
- Apr 50° 37°
- May 57° 43°
- Jun 61° 49°
- Jul 65° 53°
- Aug 65° 53°
- Sep 59° 48°
- Oct 51° 41°
- Nov 44° 36°
- Dec 40° 33°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Ketchikan in October?
The normal high is 51°F and the normal low 41°F, for a daily mean of 46.2°F. October is 7.4°F cooler than September and 6.5°F warmer than November. October is the 6th warmest month of the year in Ketchikan and the wettest. Across the month the normal high falls 8°F, from 55°F on October 1 to 47°F on October 31. From one year to the next October's mean temperature typically moves about 1.7°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 45°F and 48°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 77%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 55°F | 45°F | 70% | 57% |
| October 8 | 54°F | 43°F | 73% | 60% |
| October 15 | 51°F | 42°F | 75% | 62% |
| October 22 | 49°F | 40°F | 76% | 63% |
| October 31 | 47°F | 38°F | 77% | 64% |
Every day of October: normal high, low and chance of precipitation (warmest afternoon October 1, coldest night October 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| October 1 | 55°F | 45°F | 70% | 57% | 11 h 40 min |
| October 2 | 55°F | 45°F | 71% | 58% | 11 h 30 min |
| October 3 | 55°F | 45°F | 71% | 58% | 11 h 30 min |
| October 4 | 55°F | 44°F | 72% | 58% | 11 h 20 min |
| October 5 | 54°F | 44°F | 72% | 59% | 11 h 20 min |
| October 6 | 54°F | 44°F | 72% | 59% | 11 h 20 min |
| October 7 | 54°F | 44°F | 73% | 59% | 11 h 10 min |
| October 8 | 54°F | 43°F | 73% | 60% | 11 h 10 min |
| October 9 | 53°F | 43°F | 73% | 60% | 11 h |
| October 10 | 53°F | 43°F | 73% | 61% | 11 h |
| October 11 | 53°F | 43°F | 74% | 61% | 10 h 50 min |
| October 12 | 52°F | 42°F | 74% | 61% | 10 h 50 min |
| October 13 | 52°F | 42°F | 74% | 61% | 10 h 40 min |
| October 14 | 52°F | 42°F | 74% | 62% | 10 h 40 min |
| October 15 | 51°F | 42°F | 75% | 62% | 10 h 40 min |
| October 16 | 51°F | 41°F | 75% | 62% | 10 h 30 min |
| October 17 | 51°F | 41°F | 75% | 62% | 10 h 30 min |
| October 18 | 51°F | 41°F | 75% | 63% | 10 h 20 min |
| October 19 | 50°F | 41°F | 75% | 63% | 10 h 20 min |
| October 20 | 50°F | 40°F | 76% | 63% | 10 h 10 min |
| October 21 | 50°F | 40°F | 76% | 63% | 10 h 10 min |
| October 22 | 49°F | 40°F | 76% | 63% | 10 h |
| October 23 | 49°F | 40°F | 76% | 63% | 10 h |
| October 24 | 49°F | 39°F | 76% | 63% | 10 h |
| October 25 | 48°F | 39°F | 76% | 63% | 9 h 50 min |
| October 26 | 48°F | 39°F | 76% | 63% | 9 h 50 min |
| October 27 | 48°F | 39°F | 76% | 63% | 9 h 40 min |
| October 28 | 48°F | 38°F | 76% | 64% | 9 h 40 min |
| October 29 | 47°F | 38°F | 76% | 64% | 9 h 30 min |
| October 30 | 47°F | 38°F | 77% | 64% | 9 h 30 min |
| October 31 | 47°F | 38°F | 77% | 64% | 9 h 30 min |
- Normal high
- 51°FOctober average
- Normal low
- 41°FOctober average
- Precipitation
- 18.37 inmonth total
- Days with precipitation
- 230.01 inch or more
- Nights at 32°F or colder
- 3
- Daylight
- 11 h 40 min to 9 h 30 minOctober 1 to October 31
- Sunshine
- 50%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00025325; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Ketchikan in October?
On a given October day the chance of 0.01 inch or more is 74% on average, highest around October 31 (77%). In all, 18.37 in falls on 23 days of a normal October, 7 of them with an inch or more.
In a normal October in Ketchikan, 3 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00025325.
How humid and windy is Ketchikan in October?
At 3 p.m. the normal temperature is 45°F with 80% relative humidity and a dew point of 39°F; at 6 a.m. it is 41°F with 88% humidity. The wind averages 8.2 mph, most often from the south-southeast in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 41°F | 38°F | 88% | 7.8 mph | – |
| 9 a.m. | 43°F | 39°F | 85% | 8.6 mph | – |
| noon | 45°F | 39°F | 78% | 9.5 mph | – |
| 3 p.m. | 45°F | 39°F | 80% | 8.5 mph | – |
| 6 p.m. | 42°F | 38°F | 86% | 7.7 mph | – |
| 9 p.m. | 42°F | 38°F | 87% | 7.8 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00025325. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for October in Ketchikan?
The warmest October temperature on this station's record (since 1910) is 72°F, on October 1, 1923; the coldest is 17°F, on October 31, 1984. The wettest October brought 42.37 in (1974); the snowiest, 2.5 inches (1966).
The October mean against the 1991-2020 normal of 46.2°F: 2021 44.5°F (−1.7), 2022 49.6°F (+3.4), 2023 48.0°F (+1.8), 2024 46.4°F (+0.1), 2025 46.7°F (+0.5). 4 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 44.5°F | −1.7°F | 19.43 in |
| 2022 | 49.6°F | +3.4°F | 21.59 in |
| 2023 | 48.0°F | +1.8°F | 17.91 in |
| 2024 | 46.4°F | +0.1°F | 19.74 in |
| 2025 | 46.7°F | +0.5°F | 12.79 in |
Source: records: ACIS, station USW00025325; recent months: ACIS, station USW00025325. Records and recent months use complete months only.
How does October in Ketchikan compare across Alaska?
Across the 85 places PlainClimate covers in Alaska, October normal highs run from 24°F in Nuiqsut to 52°F in Klawock; Ketchikan's is 51°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.