Eureka (CA)
September
Weather in Eureka, California for September 2027
Your guide to Eureka weather in September - trends and predictions
In general, the average temperature in Eureka at the beginning of September is 17.3 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 15.3 °C by the end of September.
With an average of 4 rainy days, Eureka experiences minimal rainfall in September.
Is September a good time to visit Eureka? check out the best time to travel to Eureka page.
✨ Is September a good time to visit Eureka? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
26
Dry days
4
Rainy days
0
Snow days
16°/12°
Temperatures
15 km/h
Avg max wind
87 %
Avg humidity
Eureka Weather September
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Temperatures trend during September in Eureka
See the weather trend as well as the moving average line
September weather in Eureka day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain | 17° /12° | 4.3 mm | 3 | |
| Sept. 2 |  Moderate rain | 16° /12° | 22.7 mm | 3 | |
| Sept. 3 |  Patchy rain possible | 17° /12° | 0.4 mm | 4 | |
| Sept. 4 | Patchy rain possible | 18° /12° | 0 mm | 6 | |
| Sept. 5 |  Sunny | 17° /12° | 0 mm | 5 | |
| Sept. 6 | Patchy rain possible | 17° /12° | 0.1 mm | 5 | |
| Sept. 7 | Patchy rain possible | 19° /13° | 0.2 mm | 3 | |
| Sept. 8 | Patchy rain possible | 19° /11° | 0 mm | 4 | |
| Sept. 9 | Patchy rain possible | 18° /13° | 0 mm | 5 | |
| Sept. 10 |  Partly cloudy | 16° /12° | 0 mm | 3 | |
| Sept. 11 | Light rain shower | 16° /11° | 0.7 mm | 3 | |
| Sept. 12 | Patchy rain possible | 16° /11° | 0.1 mm | 4 | |
| Sept. 13 | Patchy rain possible | 16° /12° | 0.4 mm | 5 | |
| Sept. 14 |  Overcast | 16° /12° | 0.9 mm | 5 | |
| Sept. 15 | Patchy rain possible | 16° /12° | 0.2 mm | 5 | |
| Sept. 16 | Patchy rain possible | 16° /12° | 0.1 mm | 5 | |
| Sept. 17 | Light rain | 15° /12° | 3.8 mm | 4 | |
| Sept. 18 |  Fog | 15° /12° | 0 mm | 5 | |
| Sept. 19 | Fog | 15° /13° | 0.2 mm | 4 | |
| Sept. 20 | Mist | 16° /12° | 0.4 mm | 3 | |
| Sept. 21 | Partly cloudy | 15° /12° | 0.4 mm | 3 | |
| Sept. 22 | Partly cloudy | 16° /12° | 0.2 mm | 4 | |
| Sept. 23 | Partly cloudy | 18° /12° | 0 mm | 5 | |
| Sept. 24 |  Cloudy | 17° /13° | 0.9 mm | 3 | |
| Sept. 25 | Patchy rain possible | 14° /12° | 1.7 mm | 3 | |
| Sept. 26 | Fog | 15° /11° | 0 mm | 4 | |
| Sept. 27 | Mist | 15° /11° | 0.1 mm | 4 | |
| Sept. 28 | Mist | 14° /10° | 0 mm | 4 | |
| Sept. 29 | Light rain | 16° /11° | 3.4 mm | 4 | |
| Sept. 30 | Light rain | 16° /12° | 3 mm | 4 | |
| Next | |||||
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.
Change Month
Eureka in September - FAQ
What are the expected maximum and minimum temperatures in Eureka during September?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Eureka during September?
In September, Eureka can expect light to moderate rainfall, totaling 44.1 mm across approximately 4 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Eureka during September?
The average wind speed in Eureka during September is 15 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 💧
Typically, Eureka has 4 rainy days in September with a total of 44.1 mm of rainfall.
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