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Eureka (MO)
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United States weather

Weather in Eureka, Missouri for September 2026

Your guide to Eureka weather in September - trends and predictions

    Temperatures

  • So far, September 2026 in Eureka shows a warmer trend than usual by 2.8 °F.

  • The forecast for the next days in Eureka predicts a temperature of 23.4 °F, which is cooler than the historical average.

  • In general, the average temperature in Eureka at the beginning of September is 30.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 26.4 °F by the end of September.

    • Rain 🌧️

  • The climate of Eureka in September is notably wet, with an average of 11 rainy days, and a total of 324.5 mm of precipitation.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
19
Dry days
Average rainy days
11
Rainy days
Average snowy days
0
Snow days
Average temperatures
28°/17°
Temperatures
Average wind speed
12 km/h
Avg max wind
Average humidity
64 %
Avg humidity

Eureka Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Fog
33°
2
Sunny
33°
3
Overcast
31°
4
Sunny
32°
5
Partly cloudy
31°
6
Patchy rain possible
29°
7
Sunny
27°
8
Sunny
30°
9
Sunny
29°
10
Sunny
29°
11
Partly cloudy
31°
12
Sunny
32°
13
Patchy rain possible
30°
14
Mist
31°
15
Light rain shower
32°
16
Partly cloudy
32°
17
Cloudy
32°
18
Sunny
33°
19
Sunny
34°
20
Moderate rain at times
32°
21
Thundery outbreaks possible
25°
22
Moderate or heavy rain shower
27°
23
Moderate or heavy rain shower
22°
24
Moderate or heavy rain shower
22°
25
Fog
24°
26
Overcast
25°
27
Overcast
27°
28
Sunny
27°
29
Overcast
31°
30
Overcast
29°

Temperatures trend during September in Eureka

See the weather trend as well as the moving average line

September weather in Eureka day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Fog
Fog
 33° /19° 0 mm 7
Sept. 2 Sunny
Sunny
 33° /19° 0 mm 8
Sept. 3 Overcast
Overcast
 31° /18° 0 mm 7
Sept. 4 Sunny
Sunny
 32° /18° 4.8 mm 7
Sept. 5 Partly cloudy
Partly cloudy
 31° /18° 0 mm 7
Sept. 6 Patchy rain possible
Patchy rain possible
 29° /18° 9.4 mm 6
Sept. 7 Sunny
Sunny
 27° /13° 0 mm 7
Sept. 8 Sunny
Sunny
 30° /11° 0 mm 7
Sept. 9 Sunny
Sunny
 29° /14° 1.5 mm 7
Sept. 10 Sunny
Sunny
 29° /16° 21.1 mm 5
Sept. 11 Partly cloudy
Partly cloudy
 31° /19° 0.7 mm 6
Sept. 12 Sunny
Sunny
 32° /19° 0 mm 8
Sept. 13 Patchy rain possible
Patchy rain possible
 30° /20° 1.5 mm 6
Sept. 14 Mist
Mist
 31° /18° 0 mm 7
Sept. 15 Light rain shower
Light rain shower
 32° /21° 1.2 mm 7
Sept. 16 Partly cloudy
Partly cloudy
 32° /20° 1.7 mm 6
Sept. 17 Cloudy
Cloudy
 32° /20° 1 mm 7
Sept. 18 Sunny
Sunny
 33° /19° 0 mm 7
Sept. 19 Sunny
Sunny
 34° /20° 1.3 mm 7
Sept. 20 Moderate rain at times
Moderate rain at times
 32° /21° 11 mm 5
Sept. 21 Thundery outbreaks possible
Thundery outbreaks possible
 25° /20° 32.7 mm 4
Sept. 22 Moderate or heavy rain shower
Moderate or heavy rain shower
 27° /17° 11.8 mm 5
Sept. 23 Moderate or heavy rain shower
Moderate or heavy rain shower
 22° /15° 31.1 mm 5
Sept. 24 Moderate or heavy rain shower
Moderate or heavy rain shower
 22° /17° 113.8 mm 5
Sept. 25 Fog
Fog
 24° /14° 0 mm 4
Sept. 26 Overcast
Overcast
 25° /16° 0 mm 4.6
Sept. 27 Overcast
Overcast
 27° /15° 1.1 mm 5.5
Sept. 28 Sunny
Sunny
 27° /16° 0 mm 6.2
Sept. 29 Overcast
Overcast
 31° /17° 0 mm 6.4
Sept. 30 Overcast
Overcast
 29° /21° 0.1 mm 2.3
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.
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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 28° and lows near 17°, suitable for diverse activities and preferences.

How much rainfall should be expected in Eureka during September?
Significant rainfall exceeding 324.5 mm is expected in Eureka during September, occurring over more than 11 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 12 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 11 rainy days in September with a total of 324.5 mm of rainfall.

UV exposure in Eureka during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Eureka?

Get accurate weather forecasts for Eureka, located at latitude 38.503 and longitude -90.628. Stay updated with localized weather information tailored for Eureka.

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