United StatesAverage weather for Sequim in September
It's cool to moderate in September in Sequim with an average temperature of 18°C. Temperatures this month range from a low of 15°C to a high of 20°C. At night, you can expect temperatures between 10°C and 12°C.
Start of September
The month of September starts in Sequim with mild temps, averaging around 19°C during the day and nights around 12°C. There’s little chance of precipitation. The weather’s mostly sunny and dry.
Mid September
By mid-September, daytime temps drop to around 18°C, with nights around 12°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
End of September
By the end of September, the average daytime temperature in Sequim is around 17°C, while nighttime temps are about 11°C. There’s hardly any chance of precipitation. The weather will be mostly dry with plenty of sun.
In September, there is an average of 35 mm of precipitation, spread over 7 days. The wind speed is around 3 Bft, mostly coming from the West.
Sequim in September |
New York | ||
|---|---|---|---|
 Average temperature |
18°C | 27°C | |
 Max. temperature |
20°C | 31°C | |
| Min. temperature |
15°C | -5°C | |
 Total precipitation |
35 mm | 57 mm | |
| Rainy days |
7 days | 9 days | |
August
UV index
The UV index is a maximum of 5 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is September a good time to visit Sequim?
Looking for great weather? September is a good time to be in Sequim. The temperatures are nice, and there’s not too much rain.
Temperature records
With 27°C in 2017, Sequim 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 17°C.
Check out the climate of Sequim for all months and discover the best travel time
Daily Temperature in September in Sequim
This chart shows the average daily high and low temperatures in September for Sequim, 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 Sequim
The chart below shows the average daily precipitation in September for Sequim, 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 7 days of precipitation in Sequim.
Daily UV index in September in Sequim
This chart shows the average daily UV index in September in Sequim, 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 Sequim over the years
This chart shows the average temperature in September in Sequim, measured in degrees Celsius, over the past few years.
Total precipitation in September in Sequim over the years
This chart shows the average precipitation in September in Sequim, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Sequim
Click on any day in September to get detailed info about the usual weather on that day in Sequim. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Sequim
Have you been to Sequim in September?
Share your weather experience in September in Sequim.
Average weather in Sequim by month
Click on a month below to see detailed weather info for Sequim. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
