King Salmon weather in September: King Salmon, Alaska: normal highs, lows, rain and records for September
King Salmon in September has a normal high of 56°F and a normal low of 41°F, a daily mean of 49°F, falling from 61°F on the 1st to 51°F by the 30th. Measurable precipitation falls on 18 days in a normal September, 3.40 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 13°C and low of 5°C, 86 mm of precipitation in September.
- NOAA stationKing Salmon Airport
- Station IDUSW00025503
- Location58.68°N 156.63°W
- Elevation63 ft (19 m)
- Population (census place)354
- Jan 24° 10°
- Feb 30° 15°
- Mar 32° 15°
- Apr 45° 28°
- May 55° 36°
- Jun 62° 44°
- Jul 65° 49°
- Aug 63° 48°
- Sep 56° 41°
- Oct 44° 29°
- Nov 32° 18°
- Dec 26° 11°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is King Salmon in September?
The normal high is 56°F and the normal low 41°F, for a daily mean of 48.7°F. September is 7.0°F cooler than August and 12.3°F warmer than October. September is the 4th warmest month of the year in King Salmon and the wettest. Across the month the normal high falls 10°F, from 61°F on September 1 to 51°F on September 30. From one year to the next September's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 46°F and 51°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 61%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 61°F | 46°F | 60% | 33% |
| September 8 | 59°F | 44°F | 60% | 34% |
| September 15 | 57°F | 41°F | 60% | 33% |
| September 22 | 54°F | 39°F | 58% | 32% |
| September 30 | 51°F | 36°F | 55% | 30% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 61°F | 46°F | 60% | 33% | 14 h 10 min |
| September 2 | 61°F | 45°F | 60% | 33% | 14 h |
| September 3 | 60°F | 45°F | 60% | 33% | 14 h |
| September 4 | 60°F | 45°F | 60% | 33% | 13 h 50 min |
| September 5 | 60°F | 45°F | 61% | 34% | 13 h 50 min |
| September 6 | 60°F | 44°F | 61% | 34% | 13 h 40 min |
| September 7 | 59°F | 44°F | 61% | 34% | 13 h 40 min |
| September 8 | 59°F | 44°F | 60% | 34% | 13 h 30 min |
| September 9 | 59°F | 43°F | 60% | 34% | 13 h 30 min |
| September 10 | 58°F | 43°F | 60% | 34% | 13 h 20 min |
| September 11 | 58°F | 43°F | 60% | 34% | 13 h 20 min |
| September 12 | 58°F | 42°F | 60% | 34% | 13 h 10 min |
| September 13 | 57°F | 42°F | 60% | 34% | 13 h 10 min |
| September 14 | 57°F | 42°F | 60% | 34% | 13 h |
| September 15 | 57°F | 41°F | 60% | 33% | 13 h |
| September 16 | 56°F | 41°F | 60% | 33% | 12 h 50 min |
| September 17 | 56°F | 41°F | 59% | 33% | 12 h 50 min |
| September 18 | 56°F | 40°F | 59% | 33% | 12 h 40 min |
| September 19 | 55°F | 40°F | 59% | 33% | 12 h 40 min |
| September 20 | 55°F | 40°F | 59% | 33% | 12 h 30 min |
| September 21 | 55°F | 39°F | 59% | 33% | 12 h 30 min |
| September 22 | 54°F | 39°F | 58% | 32% | 12 h 20 min |
| September 23 | 54°F | 38°F | 58% | 32% | 12 h 20 min |
| September 24 | 53°F | 38°F | 57% | 32% | 12 h 10 min |
| September 25 | 53°F | 38°F | 57% | 32% | 12 h 10 min |
| September 26 | 53°F | 37°F | 57% | 31% | 12 h |
| September 27 | 52°F | 37°F | 56% | 31% | 12 h |
| September 28 | 52°F | 37°F | 56% | 31% | 11 h 50 min |
| September 29 | 51°F | 36°F | 55% | 30% | 11 h 50 min |
| September 30 | 51°F | 36°F | 55% | 30% | 11 h 40 min |
- Normal high
- 56°FSeptember average
- Normal low
- 41°FSeptember average
- Precipitation
- 3.40 inmonth total
- Days with precipitation
- 180.01 inch or more
- Nights at 32°F or colder
- 6
- Daylight
- 14 h 10 min to 11 h 40 minSeptember 1 to September 30
- Sunshine
- 61%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00025503; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in King Salmon in September?
On a given September day the chance of 0.01 inch or more is 59% on average, highest around September 5 (61%). In all, 3.40 in falls on 18 days of a normal September.
In a normal September in King Salmon, 6 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00025503.
How humid and windy is King Salmon in September?
At 3 p.m. the normal temperature is 49°F with 64% relative humidity and a dew point of 38°F; at 6 a.m. it is 39°F with 88% humidity. The wind averages 9.3 mph, most often from the northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 39°F | 35°F | 88% | 8.3 mph | – |
| 9 a.m. | 40°F | 37°F | 87% | 8.2 mph | 16% |
| noon | 47°F | 38°F | 72% | 10.8 mph | – |
| 3 p.m. | 49°F | 38°F | 64% | 11.9 mph | 13% |
| 6 p.m. | 48°F | 38°F | 68% | 10.2 mph | – |
| 9 p.m. | 42°F | 37°F | 83% | 8.3 mph | 20% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00025503. 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 September in King Salmon?
The warmest September temperature on King Salmon's official record (since 1917) is 76°F, on September 14, 2018; the coldest is 13°F, on September 26, 2021. The wettest September brought 7.30 in (1961).
The September mean against the 1991-2020 normal of 48.7°F: 2021 43.1°F (−5.6), 2022 47.7°F (−1.0), 2023 47.1°F (−1.6), 2024 48.1°F (−0.6), 2025 46.7°F (−2.0), 2026 49.3°F (+0.6). 1 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 43.1°F | −5.6°F | 2.94 in |
| 2022 | 47.7°F | −1.0°F | 4.85 in |
| 2023 | 47.1°F | −1.6°F | 2.61 in |
| 2024 | 48.1°F | −0.6°F | 2.88 in |
| 2025 | 46.7°F | −2.0°F | 2.42 in |
| 2026 | 49.3°F | +0.6°F | 1.58 in |
Source: records: ACIS, NWS threaded record AKNthr; recent months: ACIS, station USW00025503. Records and recent months use complete months only.
How does September in King Salmon compare across Alaska?
Across the 85 places PlainClimate covers in Alaska, September normal highs run from 37°F in Utqiaġvik to 60°F in Klawock; King Salmon's is 56°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.