Seward, AK weather in September
September in Seward: cool, with rain on most days. Highs 56°F, lows 43°F, about 17 wet days. Keep rain gear handy.
- Normal high
- 56°F
- Normal low
- 43°F
- Wet days
- 17
- 9.9 in total
- Daylight
- 12.8 h
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 60°F | 51°F |
| Normal low | 47°F | 39°F |
| Chance of a wet day | 55% | 57% |
| Sunrise / sunset | 6:52 am / 9:02 pm | 8:01 am / 7:34 pm |
| Daylight | 14.2 h | 11.6 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Alaska Time).
What kind of days to expect
- Comfortable dayshigh 65-80°F (temperature only: no humidity station nearby)2 of 30
- Beach dayshigh 80-95°F, under 0.05 in of rain (temperature and rain only)0 of 30
- Hot dayshigh 90°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow17 of 30
- Notable rainat least 0.10 in13 of 30
- Freezing nightslow 32°F or below1 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 9.9 in; a dry September brings about 6.2 in and a wet one about 11.5 in (25th and 75th percentiles). About 7 days bring half an inch or more, and about 3 an inch or more. Snow is very rare.
How September varies from year to year
- Warmest September, 1991-20201997: average high 60°F
- Coolest September1992: average high 50°F
- Wettest September1995: 29.7 in
- Driest September2018: 0.1 in
- Highest reading76°F (September 13, 2018)
- Lowest reading30°F (September 28, 2010)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 62°F | 56°F | 46°F |
| Normal low | 50°F | 43°F | 35°F |
| Wet days | 15 | 17 | 17 |
| Comfortable days | 9 | 2 | 0 |
| Daylight | 15.6 h | 12.8 h | 10.1 h |
Highs change by -6°F from August and -10°F into October.
How Seward ranks in September
- Normal high376th warmest of 378 cities; 6th of 8 in Alaska
- Wet days368th driest of 378
What to pack for Seward in September
- A rain jacket or umbrella – rain on about 17 days
Heating and cooling
September has 464 heating degree days and 0 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How cold is Seward in September?
The normal high is 56°F and the normal low is 43°F. From 1991 to 2020 the coldest September reading was 30°F (most recently on September 28, 2010).
Does it rain a lot in Seward in September?
About 17 days in September have at least 0.01 in of precipitation, and the normal total is 9.9 in. The wettest September in 1991-2020 was in 1995 (29.7 in); the driest was in 2018 (0.1 in).
Is September a good time to visit Seward?
September ranks 6th of 12 months on our comfort score for Seward (46 out of 100). It has about 2 comfortable days (judged by temperature only). The best months are June, July and August.
Where the numbers come from
- Temperature, rain and frost dates: Seward Airport (USW00026438), 1.9 mi NNE of the city center, 22 ft (67 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Seward 19N (USC00508377), 18 mi N of the city center, 518 ft (429 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Not available for this location: humidity and wind by hour, cloud cover and daily humidity and wind (no station close enough or similar enough in elevation).