Cold Bay weather in September: Cold Bay, Alaska: normal highs, lows, rain and records for September
Cold Bay in September has a normal high of 53°F and a normal low of 43°F, a daily mean of 48°F, falling from 56°F on the 1st to 50°F by the 30th. Measurable precipitation falls on 23 days in a normal September, 4.50 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 12°C and low of 6°C, 114 mm of precipitation in September.
- NOAA stationCold Bay Airport
- Station IDUSW00025624
- Location55.22°N 162.73°W
- Elevation78 ft (24 m)
- Population60
- Jan 33° 24°
- Feb 35° 26°
- Mar 35° 24°
- Apr 40° 30°
- May 47° 36°
- Jun 52° 42°
- Jul 56° 47°
- Aug 57° 48°
- Sep 53° 43°
- Oct 47° 36°
- Nov 40° 31°
- Dec 36° 26°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Cold Bay in September?
The normal high is 53°F and the normal low 43°F, for a daily mean of 48.4°F. September is 4.2°F cooler than August and 7.1°F warmer than October. September is the 3rd warmest month of the year in Cold Bay and the 3rd wettest. Across the month the normal high falls 6°F, from 56°F on September 1 to 50°F on September 30. From one year to the next September's mean temperature typically moves about 1.7°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 47°F and 50°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 78%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 56°F | 47°F | 73% | 35% |
| September 8 | 55°F | 45°F | 74% | 37% |
| September 15 | 54°F | 44°F | 75% | 38% |
| September 22 | 52°F | 42°F | 76% | 40% |
| September 30 | 50°F | 40°F | 78% | 41% |
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 | 56°F | 47°F | 73% | 35% | 13 h 50 min |
| September 2 | 56°F | 47°F | 73% | 35% | 13 h 50 min |
| September 3 | 56°F | 46°F | 73% | 36% | 13 h 40 min |
| September 4 | 56°F | 46°F | 74% | 36% | 13 h 40 min |
| September 5 | 55°F | 46°F | 74% | 36% | 13 h 30 min |
| September 6 | 55°F | 46°F | 74% | 36% | 13 h 30 min |
| September 7 | 55°F | 46°F | 74% | 37% | 13 h 30 min |
| September 8 | 55°F | 45°F | 74% | 37% | 13 h 20 min |
| September 9 | 55°F | 45°F | 74% | 37% | 13 h 20 min |
| September 10 | 55°F | 45°F | 75% | 37% | 13 h 10 min |
| September 11 | 54°F | 45°F | 75% | 37% | 13 h 10 min |
| September 12 | 54°F | 44°F | 75% | 38% | 13 h |
| September 13 | 54°F | 44°F | 75% | 38% | 13 h |
| September 14 | 54°F | 44°F | 75% | 38% | 12 h 50 min |
| September 15 | 54°F | 44°F | 75% | 38% | 12 h 50 min |
| September 16 | 53°F | 43°F | 75% | 39% | 12 h 50 min |
| September 17 | 53°F | 43°F | 76% | 39% | 12 h 40 min |
| September 18 | 53°F | 43°F | 76% | 39% | 12 h 40 min |
| September 19 | 53°F | 43°F | 76% | 39% | 12 h 30 min |
| September 20 | 53°F | 42°F | 76% | 39% | 12 h 30 min |
| September 21 | 52°F | 42°F | 76% | 39% | 12 h 20 min |
| September 22 | 52°F | 42°F | 76% | 40% | 12 h 20 min |
| September 23 | 52°F | 42°F | 77% | 40% | 12 h 10 min |
| September 24 | 52°F | 41°F | 77% | 40% | 12 h 10 min |
| September 25 | 52°F | 41°F | 77% | 40% | 12 h 10 min |
| September 26 | 51°F | 41°F | 77% | 40% | 12 h |
| September 27 | 51°F | 41°F | 77% | 40% | 12 h |
| September 28 | 51°F | 40°F | 77% | 40% | 11 h 50 min |
| September 29 | 51°F | 40°F | 78% | 41% | 11 h 50 min |
| September 30 | 50°F | 40°F | 78% | 41% | 11 h 40 min |
- Normal high
- 53°FSeptember average
- Normal low
- 43°FSeptember average
- Precipitation
- 4.50 inmonth total
- Days with precipitation
- 230.01 inch or more
- Nights at 32°F or colder
- 1
- Daylight
- 13 h 50 min to 11 h 40 minSeptember 1 to September 30
- Sunshine
- 53%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00025624; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Cold Bay in September?
On a given September day the chance of 0.01 inch or more is 75% on average, highest around September 30 (78%). In all, 4.50 in falls on 23 days of a normal September, 1 of them with an inch or more.
In a normal September in Cold Bay, 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00025624.
How humid and windy is Cold Bay in September?
At 3 p.m. the normal temperature is 49°F with 75% relative humidity and a dew point of 41°F; at 6 a.m. it is 43°F with 86% humidity. The wind averages 16.3 mph, most often from the west-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. | 43°F | 40°F | 86% | 14.8 mph | – |
| 9 a.m. | 44°F | 40°F | 87% | 14.9 mph | 5% |
| noon | 48°F | 41°F | 78% | 17.9 mph | – |
| 3 p.m. | 49°F | 41°F | 75% | 19.0 mph | 4% |
| 6 p.m. | 47°F | 41°F | 78% | 17.6 mph | – |
| 9 p.m. | 45°F | 40°F | 85% | 15.6 mph | 7% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00025624. 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 Cold Bay?
The warmest September temperature on Cold Bay's official record (since 1942) is 70°F, on September 1, 1960; the coldest is 26°F, on September 21, 1992. The wettest September brought 9.79 in (1965).
The September mean against the 1991-2020 normal of 48.4°F: 2021 48.0°F (−0.4), 2022 49.8°F (+1.4), 2023 48.6°F (+0.2), 2024 48.6°F (+0.3), 2025 48.8°F (+0.4), 2026 50.4°F (+2.0). 5 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 48.0°F | −0.4°F | 5.13 in |
| 2022 | 49.8°F | +1.4°F | 4.02 in |
| 2023 | 48.6°F | +0.2°F | 5.47 in |
| 2024 | 48.6°F | +0.3°F | 2.82 in |
| 2025 | 48.8°F | +0.4°F | 5.32 in |
| 2026 | 50.4°F | +2.0°F | 2.61 in |
Source: records: ACIS, NWS threaded record CDBthr; recent months: ACIS, station USW00025624. Records and recent months use complete months only.
How does September in Cold Bay 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; Cold Bay's is 53°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.