Bethel weather in September: Bethel, Alaska: normal highs, lows, rain and records for September
Bethel in September has a normal high of 53°F and a normal low of 39°F, a daily mean of 46°F, falling from 58°F on the 1st to 46°F by the 30th. Measurable precipitation falls on 17 days in a normal September, 2.89 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 12°C and low of 4°C, 73 mm of precipitation and 1 cm of snow in September.
- NOAA stationBethel Airport
- Station IDUSW00026615
- Location60.78°N 161.83°W
- Elevation102 ft (31 m)
- Population6,335
- Jan 13° 1°
- Feb 20° 7°
- Mar 22° 7°
- Apr 37° 21°
- May 52° 34°
- Jun 62° 45°
- Jul 64° 49°
- Aug 61° 47°
- Sep 53° 39°
- Oct 38° 26°
- Nov 24° 13°
- Dec 16° 4°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Bethel in September?
The normal high is 53°F and the normal low 39°F, for a daily mean of 46.1°F. September is 7.8°F cooler than August and 13.9°F warmer than October. September is the 4th warmest month of the year in Bethel and the 2nd wettest. Across the month the normal high falls 12°F, from 58°F on September 1 to 46°F on September 30. From one year to the next September's mean temperature typically moves about 2.8°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 43°F and 49°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 58%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 58°F | 45°F | 58% | 31% |
| September 8 | 56°F | 43°F | 57% | 30% |
| September 15 | 53°F | 40°F | 56% | 28% |
| September 22 | 50°F | 37°F | 53% | 26% |
| September 30 | 46°F | 33°F | 49% | 23% |
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 | 58°F | 45°F | 58% | 31% | 14 h 20 min |
| September 2 | 58°F | 45°F | 58% | 31% | 14 h 10 min |
| September 3 | 57°F | 44°F | 58% | 30% | 14 h 10 min |
| September 4 | 57°F | 44°F | 58% | 30% | 14 h |
| September 5 | 57°F | 44°F | 58% | 30% | 14 h |
| September 6 | 57°F | 43°F | 57% | 30% | 13 h 50 min |
| September 7 | 56°F | 43°F | 57% | 30% | 13 h 50 min |
| September 8 | 56°F | 43°F | 57% | 30% | 13 h 40 min |
| September 9 | 56°F | 42°F | 57% | 29% | 13 h 40 min |
| September 10 | 55°F | 42°F | 57% | 29% | 13 h 30 min |
| September 11 | 55°F | 41°F | 56% | 29% | 13 h 20 min |
| September 12 | 54°F | 41°F | 56% | 29% | 13 h 20 min |
| September 13 | 54°F | 41°F | 56% | 29% | 13 h 10 min |
| September 14 | 54°F | 40°F | 56% | 28% | 13 h 10 min |
| September 15 | 53°F | 40°F | 56% | 28% | 13 h |
| September 16 | 53°F | 39°F | 55% | 28% | 13 h |
| September 17 | 52°F | 39°F | 55% | 28% | 12 h 50 min |
| September 18 | 52°F | 39°F | 55% | 27% | 12 h 50 min |
| September 19 | 52°F | 38°F | 54% | 27% | 12 h 40 min |
| September 20 | 51°F | 38°F | 54% | 27% | 12 h 30 min |
| September 21 | 51°F | 37°F | 53% | 26% | 12 h 30 min |
| September 22 | 50°F | 37°F | 53% | 26% | 12 h 20 min |
| September 23 | 50°F | 36°F | 52% | 25% | 12 h 20 min |
| September 24 | 49°F | 36°F | 52% | 25% | 12 h 10 min |
| September 25 | 49°F | 36°F | 51% | 25% | 12 h 10 min |
| September 26 | 48°F | 35°F | 51% | 24% | 12 h |
| September 27 | 48°F | 35°F | 50% | 24% | 11 h 50 min |
| September 28 | 47°F | 34°F | 50% | 24% | 11 h 50 min |
| September 29 | 47°F | 34°F | 50% | 23% | 11 h 40 min |
| September 30 | 46°F | 33°F | 49% | 23% | 11 h 40 min |
- Normal high
- 53°FSeptember average
- Normal low
- 39°FSeptember average
- Precipitation
- 2.89 inmonth total
- Days with precipitation
- 170.01 inch or more
- Snowfall
- 0.5 inmonth total
- Nights at 32°F or colder
- 5
- Daylight
- 14 h 20 min to 11 h 40 minSeptember 1 to September 30
- Sunshine
- 59%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00026615; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Bethel in September?
On a given September day the chance of 0.01 inch or more is 55% on average, highest around September 1 (58%). In all, 2.89 in falls on 17 days of a normal September.
In a normal September in Bethel, 5 nights fall to freezing and snowfall averages 0.5 inches.
Snow falls on 1 day in a normal September.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00026615.
How humid and windy is Bethel in September?
At 3 p.m. the normal temperature is 45°F with 70% relative humidity and a dew point of 36°F; at 6 a.m. it is 36°F with 92% humidity. The wind averages 10.7 mph, most often from the north-northeast in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 36°F | 34°F | 92% | 9.6 mph | – |
| 9 a.m. | 36°F | 34°F | 91% | 9.7 mph | 12% |
| noon | 42°F | 36°F | 79% | 12.4 mph | 16% |
| 3 p.m. | 45°F | 36°F | 70% | 13.0 mph | 10% |
| 6 p.m. | 44°F | 35°F | 72% | 11.9 mph | 22% |
| 9 p.m. | 40°F | 35°F | 84% | 9.8 mph | 24% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00026615. 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 Bethel?
The warmest September temperature on Bethel's official record (since 1923) is 76°F, on September 10, 1935; the coldest is 18°F, on September 27, 1957. The wettest September brought 7.43 in (1924); the snowiest, 5.5 inches (2004).
The September mean against the 1991-2020 normal of 46.1°F: 2021 44.2°F (−1.9), 2022 46.8°F (+0.7), 2023 44.5°F (−1.6), 2024 44.4°F (−1.7), 2025 44.0°F (−2.1), 2026 46.2°F (+0.1). 2 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 44.2°F | −1.9°F | 2.29 in |
| 2022 | 46.8°F | +0.7°F | 5.61 in |
| 2023 | 44.5°F | −1.6°F | 2.52 in |
| 2024 | 44.4°F | −1.7°F | 2.15 in |
| 2025 | 44.0°F | −2.1°F | 3.06 in |
| 2026 | 46.2°F | +0.1°F | 2.89 in |
Source: records: ACIS, NWS threaded record BETthr; recent months: ACIS, station USW00026615. Records and recent months use complete months only.
How does September in Bethel 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; Bethel's is 53°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.