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Get the monthly weather forecast for Seattle, WA, including daily high/low, historical averages, to help you plan ahead.
- September Weather
- Ocean Temperatures
- Daylight Hours in Seattle in September
- Average Hours of Sunshine in Seattle in September
- What to Pack
- Best Things to Do in Seattle in September
- FAQs
- Final Thoughts
If you’ve never traveled to Seattle or anywhere in the Pacific Northwest, you probably have assumptions about the weather there. Most people associate Seattle with an excessive amount of rain and colder temperatures. While it’s true that Seattle is a rainy city and the temperatures can be cooler, that doesn’t mean that you’ll get drenched every mon...
Despite being a major city, Seattle has some beautiful little beaches that are worth checking out during your stay. While most people prefer to lounge in the sand with a good book, a meal, or simply appreciate nature, if you’re considering dipping your toes into the waters or going kayaking, knowing the average water temperatures is a good idea. Th...
When traveling, having plenty of hours of daylight is desirable. This allows you to get into all your activities without worrying about darkness falling on you. For the most part, Seattle sees 12.5 hours of daylight throughout September. August is the month with the most daylight hours, so the earlier you go in the month of September, the more hour...
Daylight and sunshine aren’t the same things. You could have a cloudy day, and it still is daylight! September brings quite a bit of sunshine to Seattle. While there is usually a good amount of cloud coverage, you can still expect around nine hours of sunshine on average throughout September.
Packing for a trip can be exciting but a little challenging when considering the varying weather conditions. September brings moderate temperatures, little rainfall, and no snow to Seattle, so packing should be pretty straightforward. Besides all the standard toiletries and other packing essentials, here are a few things you won’t want to forget wh...
There is an abundance of things to do in Seattle regardless of the time of year, especially in September. This month brings the start of all the fall festivities in the city. Here are some of the best things you can do in Seattle during your visit: 1. Enjoy immaculate city views on the top of the Space Needle 2. Wander through Pike Place Market 3. ...
There’s a lot to know about visiting a new place, including Seattle. If you still have questions about planning your trip to this beautiful city, these frequently asked questions should be able to provide you with some insight.
The weather in Seattle in September is beautiful. Temperatures stay in the 50s, and high 60s throughout the month, sometimes pushing into the low 70s. You’ll be able to wander downtown without getting poured on, experience warmth from the sunshine, and enjoy all the outdoor activities you want. With comfortable temperatures, little to no rainfall, ...
- Caitlin Lloyd
Feb 14, 2024 · The beginning of September in Seattle brings a minor change in the average high-temperature, shifting from a warm 76.3°F (24.6°C) in August to an agreeable 69.6°F (20.9°C). Seattle in September experiences a low-temperature average of 50.5°F (10.3°C).
- September temperatures in Seattle vary between a high-temperature of 69.6°F and a low-temperature of 50.5°F .
- The average relative humidity in September is 75% .
- In Seattle, Washington, during September, the rain falls for 6 days and regularly aggregates up to 0.28" of precipitation .
- April through October and December are months without snowfall .
- In Seattle, in September, the average water temperature is 53.2°F . Swimming in 53.2°F is considered dangerous. Unprotected immersion in temperatur...
- In Seattle, Washington, the average day length in September is 12h and 33min .
- In September, on the first day of the month, sunrise is at 6:28 am and sunset at 7:50 pm . On the last day of the month, sunrise is at 7:07 am and...
- The average sunshine duration in September in Seattle, Washington, is 9.4h .
- The average daily maximum UV index in September in Seattle is 4 . A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exp...
In Seattle during September average daily high temperatures decrease from 75°F to 67°F and the fraction of time spent overcast or mostly cloudy increases from 35% to 45%.
Detailed ⚡ Seattle Weather Forecast for September 2021 – day/night 🌡️ temperatures, precipitations – World-Weather.info.
Weather.com brings you the most accurate monthly weather forecast for Seattle, WA with average/record and high/low temperatures, precipitation and more.
Weather reports from September 2021 in Seattle, Washington, USA with highs and lows.
