United StatesThe weather in September in Eureka
It's pleasantly warm in September in Eureka with an average temperature of 19°C. Temperatures this month range from a low of 18°C to a high of 22°C. At night, you can expect temperatures between 10°C and 13°C.
Looking for great weather? September is a good time to be in Eureka. The temperatures are nice, and there’s not too much 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 Eureka, California. 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, Eureka reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 12°C in 2016. The extreme nighttime temperatures ranged from a lowest recorded value of 5°C to a highest value of 17°C.
Water temperature
The water temperature at Eureka is 13°C this month. This is too cold to swim without protective gear.
Rainfall amount
In September, there is an average of 49 mm of precipitation, spread over 7 days. The wind speed is around 4 Bft, mostly coming from the West.
Daily weather in September for Eureka
Click on any day in September to get detailed info about the usual weather on that day in Eureka. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Eureka | New York | |
|---|---|---|
| Average temperature | 19°C | 27°C |
| Max. temperature | 22°C | 31°C |
| Min. temperature | 10°C | -5°C |
| Total precipitation | 49 mm | 57 mm |
| Rainy days | 7 days | 9 days |
Start of September
The month of September starts in Eureka with mild temps, averaging around 20°C during the day and nights around 12°C.
Mid September
By mid-September, daytime temps stay steady at around 20°C, with nights around 12°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 Eureka is around 20°C, while nighttime temps are about 11°C. A shower might pop up, but overall, the weather will be dry and sunny.
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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.
Check out the climate of Eureka for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in Eureka, California. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Eureka
Temperature in September in Eureka over the years
Precipitation charts
These charts show the average amount of precipitation in September in Eureka, California. 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 Eureka
Total precipitation in September in Eureka over the years
Daily UV index in September in Eureka
This chart shows the average daily UV index in September in Eureka, 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 Eureka
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Average weather in Eureka by month
Click on a month below to see detailed weather info for Eureka. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.