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Jul 18, 2022 · 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.
Get the monthly weather forecast for Seattle, WA, including daily high/low, historical averages, to help you plan ahead.
Feb 16, 2021 · Although blistering sunny weather is infrequent in Seattle, overcast but not rainy days are not unusual. The record number of consecutive dry days is 55, set in 2017, and your best chance for a clear forecast falls between June and September.
September Weather in Seattle Washington, United States. Daily high temperatures decrease by 8°F, from 75°F to 67°F, rarely falling below 59°F or exceeding 83°F. Daily low temperatures decrease by 5°F, from 57°F to 51°F, rarely falling below 45°F or exceeding 61°F.
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).
Nearly every September day warms to over 60 degrees Fahrenheit (16 degrees Celsius) in Seattle. The city averages 4 days this month when the thermometer reaches into the 80s °F (over 27 °C). Temperatures above 90 °F (32 °C) are unusual here during September.
The weather in Seattle in September is mildly cool, humid but cool, with average highs of 71°F (22°C) and lows of 52°F (11°C).
Weather reports from September 2021 in Seattle, Washington, USA with highs and lows.
September is generally a very mild month. The average temperature is of 17 °C (63 °F), with a minimum of 12 °C (53.6 °F) and a maximum of 22 °C (71.6 °F). On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 7.5 °C (45.5 °F). However, it dropped to 5.6 °C (42.1 °F) in September 1999.
Get Seattle weather conditions in September. We provide day and night temperatures, sunshine hours and precipitations averages for Seattle in September.
