United StatesAverage weather for Eureka in September
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.
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. No precipitation expected at the start of the month; it’ll be sunny.
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.
Water temperature
The water temperature at Eureka is 13°C this month. This is too cold to swim without protective gear.
In September, there is an average of 49 mm of precipitation, spread over 3 days. The wind speed is around 4 Bft, mostly coming from the West.
Eureka in September |
New York | ||
|---|---|---|---|
 Average temperature |
19°C | 27°C | |
 Max. temperature |
22°C | 31°C | |
| Min. temperature |
18°C | -5°C | |
 Total precipitation |
49 mm | 57 mm | |
| Rainy days |
3 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 Eureka?
Looking for great weather? September is a good time to be in Eureka. The temperatures are nice, and there’s not too much rain.
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.
Check out the climate of Eureka for all months and discover the best travel time
Daily Temperature in September in Eureka
This chart shows the average daily high and low temperatures in September for Eureka, 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 Eureka
The chart below shows the average daily precipitation in September for Eureka, 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 3 days of precipitation in Eureka.
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.
Temperature in September in Eureka over the years
This chart shows the average temperature in September in Eureka, measured in degrees Celsius, over the past few years.
Total precipitation in September in Eureka over the years
This chart shows the average precipitation in September in Eureka, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
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.
Weather experiences in September in Eureka
Have you been to Eureka in September?
Share your weather experience in September in Eureka.
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.
