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Weather in Coeur d'Alene, Idaho for September 2026

Your guide to Coeur d'Alene weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Coeur d'Alene is cooler than usual, with temperatures averaging 20.7 °F, this is 4.3 °F below the typical seasonal average.

  • The forecast for the next days in Coeur d'Alene predicts temperatures to be around 17 °F, close to the historical average.

  • In general, the average temperature in Coeur d'Alene at the beginning of September is 28.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.1 °F by the end of September.

    • Rain 🌧️

  • Coeur d'Alene experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 32.9 mm.

    • More

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

Average dry days
20
Dry days
Average rainy days
10
Rainy days
Average snowy days
0
Snow days
Average temperatures
25°/13°
Temperatures
Average wind speed
11 km/h
Avg max wind
Average humidity
47 %
Avg humidity

Coeur d'Alene Weather September

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

Temperatures trend during September in Coeur d'Alene

See the weather trend as well as the moving average line

September weather in Coeur d'Alene day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Partly cloudy
Partly cloudy
 34° /15° 0 mm 6
Sept. 2 Partly cloudy
Partly cloudy
 29° /14° 12.9 mm 6
Sept. 3 Cloudy
Cloudy
 27° /15° 14.3 mm 5
Sept. 4 Sunny
Sunny
 26° /14° 20.8 mm 5
Sept. 5 Sunny
Sunny
 29° /11° 0 mm 7
Sept. 6 Sunny
Sunny
 30° /12° 0.5 mm 6
Sept. 7 Overcast
Overcast
 26° /15° 15.5 mm 5
Sept. 8 Partly cloudy
Partly cloudy
 28° /12° 3.5 mm 6
Sept. 9 Partly cloudy
Partly cloudy
 26° /13° 0.9 mm 6
Sept. 10 Partly cloudy
Partly cloudy
 26° /13° 1.4 mm 5
Sept. 11 Moderate rain at times
Moderate rain at times
 20° /12° 4 mm 4
Sept. 12 Heavy rain at times
Heavy rain at times
 21° /11° 1.7 mm 3
Sept. 13 Cloudy
Cloudy
 21° /10° 3 mm 4
Sept. 14 Patchy rain possible
Patchy rain possible
 18° /9° 3.7 mm 4
Sept. 15 Overcast
Overcast
 19° /9° 0.9 mm 4
Sept. 16 Sunny
Sunny
 24° /9° 0 mm 6
Sept. 17 Heavy rain at times
Heavy rain at times
 22° /12° 2.6 mm 5
Sept. 18 Overcast
Overcast
 24° /12° 0 mm 6
Sept. 19 Cloudy
Cloudy
 25° /12° 0 mm 6
Sept. 20 Sunny
Sunny
 24° /12° 0 mm 5
Sept. 21 Sunny
Sunny
 26° /13° 0 mm 4.7
Sept. 22 Overcast
Overcast
 21° /14° 0 mm 4
Sept. 23 Overcast
Overcast
 20° /11° 0 mm 4.2
Sept. 24 Overcast
Overcast
 24° /10° 0 mm 4.3
Sept. 25 Patchy rain possible
Patchy rain possible
 17° /7° 9.5 mm 1.8
Sept. 26 Sunny
Sunny
 13° /2° 0 mm 4
Sept. 27 Overcast
Overcast
 14° /5° 0.1 mm 3
Sept. 28 Patchy rain possible
Patchy rain possible
 11° /4° 0.3 mm 4
Sept. 29 Light rain shower
Light rain shower
 11° /3° 11.8 mm 3
Sept. 30 Mist
Mist
 9° /2° 0.3 mm 3
Next
Important Notice
Our weather forecast for Coeur d'Alene 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 Coeur d'Alene forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Coeur d'Alene in September - FAQ

What are the expected maximum and minimum temperatures in Coeur d'Alene during September?
Enjoy moderate daytime temperatures of up to 25° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Coeur d'Alene during September?
In September, Coeur d'Alene can expect light to moderate rainfall, totaling 32.9 mm across approximately 10 days. Occasional showers are possible, and planning ahead for them could be helpful.

What are the typical wind conditions in Coeur d'Alene during September?
The average wind speed in Coeur d'Alene during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Coeur d'Alene

Explore the daily rainfall trends and prepare for Coeur d'Alenes September weather 💧
Typically, Coeur d'Alene has 10 rainy days in September with a total of 32.9 mm of rainfall.

UV exposure in Coeur d'Alene during September

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

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Location coordinates Where is Coeur d'Alene?

Get accurate weather forecasts for Coeur d'Alene, located at latitude 47.678 and longitude -116.78. Stay updated with localized weather information tailored for Coeur d'Alene.

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