Eureka
September
Weather in Eureka for September 2025
Your guide to Eureka weather in September - trends and predictions
In general, the average temperature in Eureka at the beginning of September is 27.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 22.9 °F by the end of September.
Eureka experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 110.8 mm.
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Temperatures
Rain 🌧️
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23
Dry days
7
Rainy days
0
Snow days
27°/17°
Temperatures
13 km/h
Avg max wind
64 %
Avg humidity
Eureka Weather September
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  31° | 2  27° | 3  26° | 4 30° | 5  31° | 6  28° | |
| 7 22° | 8 24° | 9 29° | 10 31° | 11 33° | 12 28° | 13 24° |
| 14 26° | 15 27° | 16 31° | 17  28° | 18 31° | 19 33° | 20  32° |
| 21  27° | 22 31° | 23 18° | 24 20° | 25 24° | 26 24° | 27 22° |
| 28 22° | 29 22° | 30 26° |
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Temperatures trend during September in Eureka
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Fog | 31° /19° | 0 mm | 7 | |
| Sept. 2 | Sunny | 27° /16° | 0 mm | 7 | |
| Sept. 3 | Overcast | 26° /14° | 0 mm | 6 | |
| Sept. 4 | Sunny | 30° /14° | 0 mm | 8 | |
| Sept. 5 | Partly cloudy | 31° /17° | 0 mm | 8 | |
| Sept. 6 | Patchy rain possible | 28° /18° | 0.2 mm | 6 | |
| Sept. 7 | Sunny | 22° /11° | 0 mm | 6 | |
| Sept. 8 | Sunny | 24° /8° | 0 mm | 6 | |
| Sept. 9 | Sunny | 29° /11° | 0 mm | 7 | |
| Sept. 10 | Sunny | 31° /13° | 0 mm | 8 | |
| Sept. 11 | Partly cloudy | 33° /17° | 0 mm | 8 | |
| Sept. 12 | Sunny | 28° /17° | 0 mm | 7 | |
| Sept. 13 | Patchy rain possible | 24° /17° | 4.4 mm | 5 | |
| Sept. 14 | Mist | 26° /17° | 0 mm | 6 | |
| Sept. 15 | Light rain shower | 27° /18° | 0.8 mm | 6 | |
| Sept. 16 | Partly cloudy | 31° /19° | 0 mm | 8 | |
| Sept. 17 | Cloudy | 28° /18° | 0 mm | 6 | |
| Sept. 18 | Sunny | 31° /17° | 0 mm | 8 | |
| Sept. 19 | Sunny | 33° /17° | 0 mm | 8 | |
| Sept. 20 | Moderate rain at times | 32° /22° | 3.3 mm | 7 | |
| Sept. 21 | Thundery outbreaks possible | 27° /23° | 0 mm | 6 | |
| Sept. 22 | Moderate or heavy rain shower | 31° /21° | 21.4 mm | 7 | |
| Sept. 23 | Moderate or heavy rain shower | 18° /16° | 67.7 mm | 4 | |
| Sept. 24 | Moderate or heavy rain shower | 20° /18° | 11.2 mm | 5 | |
| Sept. 25 | Fog | 24° /12° | 0 mm | 5 | |
| Sept. 26 | Fog | 24° /12° | 0 mm | 5 | |
| Sept. 27 | Overcast | 22° /18° | 0 mm | 5 | |
| Sept. 28 | Overcast | 22° /17° | 1.9 mm | 5 | |
| Sept. 29 | Overcast | 22° /19° | 0 mm | 5 | |
| Sept. 30 | Mist | 26° /18° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Eureka in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Eureka forecast closer to your planned date for the most up-to-date weather information.
Eureka in September - FAQ
What are the expected maximum and minimum temperatures in Eureka during September?
During September, expect a variety of temperatures with highs around 27° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in Eureka during September?
Significant rainfall exceeding 110.8 mm is expected in Eureka during September, occurring over more than 7 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Eureka during September?
The average wind speed in Eureka during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Eureka
Explore the daily rainfall trends and prepare for Eurekas September weather 💧
UV exposure in Eureka during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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