United StatesAverage weather for Federal Way in September
It's pleasantly warm in September in Federal Way with an average temperature of 22°C. Temperatures this month range from a low of 18°C to a high of 25°C. At night, you can expect temperatures between 11°C and 15°C.
Start of September
The month of September starts in Federal Way with warm temps, averaging around 25°C during the day and nights around 15°C. There’s little chance of precipitation. The weather’s mostly sunny and dry.
Mid September
By mid-September, daytime temps drop to around 22°C, with nights around 14°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in Federal Way is around 20°C, while nighttime temps are about 13°C. A shower might pop up, but overall, the weather will be dry and sunny.
In September, there is an average of 42 mm of precipitation, spread over 8 days. The wind speed is around 3 Bft, mostly coming from the Southwest.
Federal Way in September |
New York | ||
|---|---|---|---|
 Average temperature |
22°C | 27°C | |
 Max. temperature |
25°C | 31°C | |
| Min. temperature |
18°C | -5°C | |
 Total precipitation |
42 mm | 57 mm | |
| Rainy days |
8 days | 9 days | |
August
UV index
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is September a good time to visit Federal Way?
Looking for great weather? September is a good time to be in Federal Way. The temperatures are nice, and there’s not too much rain.
Temperature records
With 32°C in 2020, Federal Way reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 12°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of 6°C to a highest value of 20°C.
Check out the climate of Federal Way for all months and discover the best travel time
Daily Temperature in September in Federal Way
This chart shows the average daily high and low temperatures in September for Federal Way, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Federal Way
The chart below shows the average daily precipitation in September for Federal Way, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 8 days of precipitation in Federal Way.
Daily UV index in September in Federal Way
This chart shows the average daily UV index in September in Federal Way, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Federal Way over the years
This chart shows the average temperature in September in Federal Way, measured in degrees Celsius, over the past few years.
Total precipitation in September in Federal Way over the years
This chart shows the average precipitation in September in Federal Way, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Federal Way
Click on any day in September to get detailed info about the usual weather on that day in Federal Way. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Federal Way
Have you been to Federal Way in September?
Share your weather experience in September in Federal Way.
Average weather in Federal Way by month
Click on a month below to see detailed weather info for Federal Way. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Federal Way for all months at once
