Sitka, AK weather in September
September in Sitka: cool, with rain on most days. Highs 58°F, lows 49°F, rain on about 22 days. Keep rain gear handy.
- Normal high
- 58°F
- Normal low
- 49°F
- Wet days
- 22
- 11.7 in total
- Muggy days
- 0
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 61°F | 55°F |
| Normal low | 51°F | 46°F |
| Chance of a wet day | 72% | 77% |
| Sunrise / sunset | 6:03 am / 7:58 pm | 7:03 am / 6:39 pm |
| Daylight | 13.9 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).
A typical September day
- 6 am51°Fdew point 47°F
- 9 am53°Fdew point 48°F
- Noon56°Fdew point 49°F
- 3 pm56°Fdew point 49°F
- 6 pm55°Fdew point 49°F
- 9 pm52°Fdew point 48°F
NOAA hourly normals (local standard time) from Sitka Airport (1 mi away); average wind 7 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F2 of 30
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph0 of 30
- Hot dayshigh 90°F or more0 of 30
- Muggy daysdaily mean dew point 65°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow22 of 30
- Notable rainat least 0.10 in18 of 30
- Freezing nightslow 32°F or below0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 11.7 in; a dry September brings about 9.5 in and a wet one about 14.2 in (25th and 75th percentiles). About 8 days bring half an inch or more, and about 3 an inch or more.
How September varies from year to year
- Warmest September, 1991-20201995: average high 63°F
- Coolest September1992: average high 54°F
- Wettest September1991: 18.7 in
- Driest September2018: 3.5 in
- Highest reading75°F (September 17, 1995)
- Lowest reading33°F (September 30, 1996)
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 | 58°F | 51°F |
| Normal low | 53°F | 49°F | 42°F |
| Wet days | 19 | 22 | 24 |
| Comfortable days | 7 | 2 | 0 |
| Daylight | 15.2 h | 12.8 h | 10.3 h |
Highs change by -4°F from August and -7°F into October.
Nearby alternatives in September
- Drier: Skagway, AK166 mi · high 57°F · 17 wet days
How Sitka ranks in September
- Normal high372nd warmest of 378 cities; 2nd of 8 in Alaska
- Wet days377th driest of 378
- Comfortable days255th most of 342
What to pack for Sitka in September
- A rain jacket or umbrella – rain on about 22 days
Heating and cooling
September has 354 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 Sitka in September?
The normal high is 58°F and the normal low is 49°F. From 1991 to 2020 the coldest September reading was 33°F (most recently on September 30, 1996).
Does it rain a lot in Sitka in September?
About 22 days in September have at least 0.01 in of precipitation, and the normal total is 11.7 in. The wettest September in 1991-2020 was in 1991 (18.7 in); the driest was in 2018 (3.6 in).
Is September a good time to visit Sitka?
September ranks 6th of 12 months on our comfort score for Sitka (43 out of 100). It has about 2 comfortable days. The best months are June, July and August.
Where the numbers come from
- Temperature, rain, frost dates and humidity and wind by hour: Sitka Airport (USW00025333), 1.4 mi WSW of the city center, 14 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Sitka Rocky Gutierrez Arpt (703710-25333), 1.4 mi WSW of the city center, 20 ft . Hourly observations, 1991-2020.
- Not available for this location: snowfall, snow depth and cloud cover (no station close enough or similar enough in elevation).