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United StatesThe weather in September in Ilwaco
It's pleasantly warm in September in Ilwaco with an average temperature of 21°C. Temperatures this month range from a low of 18°C to a high of 26°C. At night, you can expect temperatures between 10°C and 14°C.
Looking for sun? September isn’t a good month to be in Ilwaco. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Ilwaco, Washington. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 33°C in 2017, Ilwaco reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 11°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of 3°C to a highest value of 17°C.
Rainfall amount
In September, there is an average of 173 mm of precipitation, spread over 16 days. The wind speed is around 4 Bft, mostly coming from the Southwest.
Daily weather in September for Ilwaco
Click on any day in September to get detailed info about the usual weather on that day in Ilwaco. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Ilwaco | New York | |
|---|---|---|
| Average temperature | 21°C | 27°C |
| Max. temperature | 26°C | 31°C |
| Min. temperature | 10°C | -5°C |
| Total precipitation | 173 mm | 57 mm |
| Rainy days | 16 days | 9 days |
Start of September
The month of September starts in Ilwaco with warm temps, averaging around 23°C during the day and nights around 14°C.
Mid September
By mid-September, daytime temps drop to around 20°C, with nights around 12°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of September
By the end of September, the average daytime temperature in Ilwaco is around 20°C, while nighttime temps are about 12°C. There’s a significant chance of many days with precipitation.
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UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of Ilwaco for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in Ilwaco, Washington. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Ilwaco
Temperature in September in Ilwaco over the years
Precipitation charts
These charts show the average amount of precipitation in September in Ilwaco, Washington. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Ilwaco
Total precipitation in September in Ilwaco over the years
Daily UV index in September in Ilwaco
This chart shows the average daily UV index in September in Ilwaco, 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.
Weather experiences in September in Ilwaco
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Average weather in Ilwaco by month
Click on a month below to see detailed weather info for Ilwaco. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.