Normal weather for Ilwaco in September
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.
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.
Ilwaco in September |
New York | ||
|---|---|---|---|
 Average Temperature |
21°C | 27°C | |
 High Temp |
26°C | 31°C | |
| Low Temp |
18°C | 21°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. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
With the temperature difference between day and night, it’s smart to wear layers. A T-shirt, light pants or skirt, and a light jacket are great for the day. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
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.
Since it cools down at night, it’s a good idea to wear layers. During the day, a shirt, maybe a light sweater, and thin pants will do. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
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.
Because temperatures drop in the evening, wearing layers is recommended. During the day, a shirt, maybe a light sweater, and thin pants will do. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
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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.
Is September a good time to visit Ilwaco?
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.
Temperature records for Ilwaco in September
Check out the climate of Ilwaco for all months and discover the best travel time
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Daily Temperature in September in Ilwaco
This chart shows the average daily high and low temperatures in September for Ilwaco, 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 Ilwaco
The chart below shows the average daily precipitation in September for Ilwaco, 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 16 days of precipitation in Ilwaco.
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.
Temperature in September in Ilwaco Over the Years
This chart shows the average temperature in September in Ilwaco, measured in degrees Celsius, over the past few years.
Total Precipitation in September in Ilwaco Over the Years
This chart shows the average precipitation in September in Ilwaco, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily Climate 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.
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.
